Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
2 ~
DOC. NO. 4299-01
CYLINDER LOCK
~ CROSS-REFERENCE TO RELATED APPLICATIONS
The following applications are cross referenced herein
as related applications, are filed on even date herewith,
and are incorporated herein by reference thereto.
1. Title: Cylindrical Lock Assembly
Attorney Docket No. 4300-01
Applicants: James E. Robida; Kenneth W. Strickland
2. Title: Cylindrical Lock Assembly
Attorney Docket No. 4301-01
Applicants: Mohammed A. Haq; Edward T. Leitkowski, Jr.
3. Title: Cylindrical Lock Assembly
Attorney Docket No. 4302-01
Applicants: James E. Robida; Edward T. Leitkowski, Jr.
4. Title: Cylindrical Lock Assembly
Attorney Docket No. 4360-01
Applicants: James E. Robida; Kenneth W. Strickland
BACKGROUND OF THE INVENTION
This invention relates to a cylinder lock and
particularly relates to a cylinder lock having an adjustable
tailpiece.
Typically, a cylindrical lock assembly includes a
rollback or sleeve onto which is assembled a knob or lever
which functions as a lock operator. A spring-biased plate
extends partially from within the sleeve and through a slot
in the sleeve and serves to retain the knob or lever with
21~3~ ~d
the sleeve. The knob or sleeve may be removed from the
sleeve by selective depression of the plate into the sleeve
through an access hole in the knob or sleeve. Since
removal of the knob or lever will expose the inner portions
of the assembly and thereby provide possible unauthorized
entry, it is important that the knob or lever be removable
only by an authorized person.
The cylindrical lock assembly has a cylinder lock which
includes a tailpiece which is rotatable upon operation of
the lock by use of a key. The tailpiece typically
functions upon key operation of the lock to retract a latch
bolt to permit opening of a door to which the assembly is
mounted. In addition, the tailpiece is positioned within
the sleeve adjacent the spring-biased plate and prevents
inward movement of the plate when the cylinder lock is in
the locked condition. When the key is used to unlock the
cylinder lock, the tailpiece is thereby rotated to a
position which permits the depression of the spring-biased
plate by us of an implement positioned through the access
hole of the knob or lever.
Thus, the requirement that a key must be used in the
cylinder lock to facilitate removal of the knob or lever is
a significant security feature of such a system.
Due to the fixed location of the spring-biased plate
within the sleeve and the slot through which it extends,
the tailpiece must be in a precise orientation and location
to prevent manipulation of the plate regardless of whether
the cylinder lock is assembled with a knob or a lever.
Typically, in a lever arrangement, the key slot and a
rib portion of the cylinder lock are oriented horizontally
in which case the tailpiece is also oriented horizontally
and is in proper orientation to prevent movement of the
spring-biased plate. When the key is operated, the
tailpiece is rotated to permit depression of the spring-
2~3~ ~
biased plate and removal of the lever from the sleeve ifdesired.
In a knob arrangement, the key slot and rib portion are
oriented in a vertical direction. However, the tailpiece
must be in the horizontal orientation to preclude movement
of the spring-biased plate.
Therefore, when it is desired to change from a
lever-operated system to a knob-operated system, a cylinder
lock of dedicated design must be provided for each system.
This requires dual manufacturing, packaging and stocking.
Also, it is an added cost to the ultimate customer who is
changing from a lever to a knob system.
Thus, there is a need for versatile cylinder lock which
can be used in both the knob-operated and the
lever-operated systems.
SUMMARY OF THE INVENTION
In view of the foregoing problem, it is an object of
this invention to provide a cylinder lock which has
versatility in use with knob-operated systems and
lever-operated systems.
Another object of this invention is to provide a
cylinder lock which forms a component of a cylinder lock
which forms a component of a cylindrical lock assembly with
versatility in use with a knob-operated or lever-operated
system.
With these and other objects in mind, this invention
contemplates a cylinder lock which includes a shell having
an axial opening for supporting a plug therein. A rib
extends radially from the shell along the length thereof.
The rib and plug are each formed with a plurality of
aligned transaxis holes which receive tumbler pins within
the holes which are retained therein. A key slot is formed
ln a first or entry end of the plug in the axial direction
and extends through a second end thereof. A tailpiece is
-'~ 20~3~
attachable to the second end of the plug. Adjusting means
are provided for adjustably attaching the tailpiece to the
second end of the plug so that the tailpiece can be
adjustably positioned in at least two orientations relative
to the orientation of the key slot.
Other objects, features and advantages of the present
invention will become more fully apparent from the
following detailed description of the preferred embodiment,
the appended claims and the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings:
FIG. 1 is an exploded perspective view of a cylindrical
lock assembly embodying certain principles of the
invention;
FIG. 2 is a plan view of the cylindrical lock assembly
of FIG. 1 as assembled with a door;
FIG. 3 is an exploded perspective view of a chassis of
the cylindrical lock assembly of FIG. l;
FIGS. 4 and 5 are exploded perspective views of
components of the chassis of FIG. 3;
FIG. 6 is an exploded perspective view of a locking
arrangement which can be used with the cylindrical lock
assembly of FIG. 1;
FIG. 7 is a partial plan view of a linkage bar of the
locking arrangement of FIG. 6;
FIG. 8 is an exploded perspective view of a cylinder
lock embodying certain principles of the invention;
FIG. 9 is a rear view of a plug of the cylinder lock of
FIG. 8;
FIG. 10 is a plan view of an actuator of the cylinder
lock of FIG. 8, and
FIG. 11 is a rear view of a cap of the cylinder lock of
FIG. 8.
29~
-5-
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As illustrated in FIG. 1, a cylindrical lock assembly
20 includes an inside subassembly 22 and an outside
subassembly 24. The inside subassembly 22 includes a rose
liner 26, a return spring cassette 28, a rose 30, a lever
32, a lever insert 34 and a turn button 36. The outside
assembly 24 includes a rose liner 38, a return spring
cassette 40, a rose 42, a cylinder lock 44, a lever 46 and
a lever insert 48.
A chassis 50 is located between the inside subassembly
22, and the outside subassembly 24. A latch assembly 52 is
positioned for operable attachment to chassis 38 and
includes a latchbolt 54 which extends outwardly from the
latch assembly in an extended or latched postion in a
direction away from the chassis 50. A strike box 56 and a
strike 58 are mounted in a door frame (not shown~ in
cooperation with the cylindrical lock assembly 20.
Rose liners 26 and 38 are each formed in a circular
configuration with four equally spaced slots 60 in the
periphery thereof. Each of the liners 26 and 38 are formed
with an axial opening 62, as illustrated with respect to
liner 26, around which is formed a circular depression 64
on one side thereof and which appears as a protruding
section 66 on the opposite side thereof as illustrated with
respect to rose liner 38. A pair of screw holes 68 are
formed in the depression 64 and through the protruding
section 66 with clearance walls 70 formed therearound. A
pair of tabs 72 are formed by punching holes 74 through the
rose liners 26 and 38 with the tabs extending toward the
other rose liners.
Cassettes 28 and 40 each include a circular housing 76
formed with a side wall 78 to form a dish-like cavity 80.
Four equally spaced pads 82 are formed in the cavity and
extend radially inwardly from side wall 78. The pads 82
~3 ~ 3~
are formed with an exterior configuration which is
consistent with the shapes of slots 60 of rose liners 26
and 38. A pair of posts 84 and 86 are formed on two
oppositely spaced pads 82 and extend outwardly from cavity
80. Post 84 is formed with an axial hole 88 which is
threaded and extends through the post but does not extend
through an outer face 90 which is illustrated on cassette
28. Post 86 is formed with an unthreaded hole 92 which
extends through outer face 90.
A coil or torsion spring 94 and a lever arbor 96 are
positioned in a concentric axial arrangement within cavity
80 so that the arbor extends into and partially through an
axial opening 98 formed through outer face 90 and a hub 100
which extends outwardly from the outer face. Also, arbor
96 is mounted for rotary movement relative to housing 76.
An outer end of spring 94 is attached to an adjacent
portion of cavity 80 to preclude movement of the outer
end. An inner end of spring 94 is attached to arbor 96 for
movement with the arbor thereby allowing compression of the
coil spring. A cover 102 is positioned within cavity 80
and over coil spring 94 and arbor 96 and is fastened to
housing 76 to retain the spring and arbor in the concentric
and axial arrangement within the cavity.
Roses 30 and 42 are each formed with a circular face
104 and a side wall 106. An axial opening 108 is formed
through the face 104 and extends through a hub 110 which
extends outwardly from the face.
Cylinder lock 44 includes a cylinder shell 112 with a
central axial opening for receiving a cylinder plug 114. A
tailpiece 116 extends axially from one end of plug 114 and
though a tailpiece anchor plate 118 which is held with
shell 112 by a threaded cap 120. A tumbler supporting rib
122 is formed integrally with shell 112 and extends
laterally therefrom. A tumbler cover 124 is positioned
2~31 ~5
over the outer portion of rib 122 to contain pin tumblers
which are contained within the rib in alignment with mating
portions of plug 114 to provide a key-operated locking
facility.
Levers 32 and 46 each include a handle 126 which is
formed integrally with a hub 128. A protrusion 130 is
formed integrally with handle 126 and hub 128 at the inner
corner of the juncture of the handle and hub. Hub 128 is
formed with an axial opening 132 which communicates with an
opening 134 formed in protrusion 130. Further, a slot 136
is formed in hub 128 which communicates with the outward
end portion of axial opening 132 formed in the hub. An
opening 138 is formed through handle 126 in axial alignment
with, and in communication with, axial opening 132.
Opening 138 is of a smaller diameter than the diameter of
opening 132.
Turn button 36 is formed with a finger-grip end 140 at
one end thereof which normally protrudes from opening 138
of lever 32. An attachment structure is formed at the
opposite end of turn button 36 for engagement with elements
within chassis 50 to facilitate locking of the latchbolt 54
in the extended position or latched by rotation of the
button.
Referring now to FIGS. 1 and 3, chassis 50 includes a
retractor 142 which is formed with a rear support 144 and a
pair of vertically spaced, horizontally extending arms 146
and 148. The facing ends of arms 146 and 148 are formed
with lips 150 and 152, respectively. A pair of pockets
(not shown) are formed in the rear of support 144 to
receive one end of a pair of compression springs 154 and
156. The opposite ends of springs 154 and 156 are
positioned over a pair of spaced fingers 158 and 160,
respectively, of an integrally formed retainer 162.
Retractor 142 is formed with a pair of cam surfaces 164 and
2 ~ Ji3
166 on one side thereof. A similar pair of cam surfaces
(not shown) are formed on the opposite side of retractor
142.
A pair of rollbacks or sleeves 168 and 170 are each
formed with an axial through hole 172 and with slots 174,
176, and 178 in one end thereof. Slots 174 and 178 are
aligned-vertically and slot 176 is located on one side of
the sleeves 168 and 170 angularly spaced by ninety degrees
from slots 174 and 178. Sleeve 168 is formed with a pair
of camming elements 180 and 182 which are formed by rolling
back portions of the sleeve which extend from the end of
the cylindrical portion of the sleeve.
A single camming element 184 is formed from sleeve 170. A
tab 186 protrudes outwardly from an intermediate portion of
each of the sleeves 168 and 170. As illustrated in FIG. 3,
tab 186 protrudes from an upper surface of sleeve 170. Tab
186 of sleeve 168 extends from a lower surface of the
sleeve but is not visible in FIG. 3.
Referring to FIGS. 3 and 4, chassis 50 further includes
a case 188 and a sleeve 190. Case 188 is formed in a
U-shaped configuration having a base 192 and a pair of legs
194 and 196 formed integrally with the base. Base 192 is
formed with an opening 198 which communicates with a pair
of notches 200 and 202 formed in the legs 194 and 196,
respectively, at the junctures of the legs and the base.
Base 192 is further formed with a tab 204 which protrudes
slightly into opening 198. Leg 194 is formed with a pair
of spaced, hook-like tabs 206 and 208 at the free end of
the leg with a notch 210 formed in the free end of the leg
between the tabs. In similar fashion, leg 196 is formed
with a pair of spaced, hook-like tabs 212 and 214 at the
free end of the leg with a notch 216 formed in the free end
of the leg between the tabs.
2~S3~ )
Sleeve 190 is formed in a cylindrical shape with a
flange 218 at one end thereof which has a diameter greater
that the diameter of the opening 198 of case 18~. The
periphery of sleeve 190 is threaded and is formed with a
longitudinal slot 220 therein. Further, a longitudinal
slot 222 is formed in the inner wall of sleeve 190.
As illustrated in FIG. 3, the threaded portion of the
sleeve 190 is inserted between legs 194 and 196 and through
opening 198 of case 188 with flange 218 re~ting against the
inner surface of base 192 adjacent the opening. In this
arrangement, the threaded portion of the sleeve 190 extends
from the outer surface of base 192 and combines with case
188 to form a case assembly 224.
Referring again to FIG.4, an inwardly turned tab 226 is
formed along a side edge of leg 194 of case 188. In
similar fashion, an inwardly turned tab 228 is formed along
a side edge of leg 196 of case 188 in spaced and aligned
relation with tab 226.
Referring to FIGS. 3 and 5, a cap 230 in generally
circular and is formed with a central opening 232 and a tab
234 protruding inwardly into the opening. A pair of
diametrically opposed slots 236 and 238 are formed in the
periphery of cap 230. Four spaced through holes 240, 242,
244 and 246 are formed in cap 230. A sleeve 248 is of
cylindrical shape and is formed with a flange 250 at one
end thereof which has a diameter larger than the diameter
of opening 232. The peripheral surface of sleeve 248 is
threaded and is formed with a longitudinal slot 252. A
longitudinal slot 254 is formed in the inner wall of sleeve
248. As illustrated in FIG. 3, cap 230 and sleeve 248 are
assembled to form a cap assembly 256 with the threaded
portion of the sleeve inserted through opening 232 and
extending outwardly from the cap. In this position, flange
250 is flush against the adjacent surface of cap 230.
20~3196
--10--
As illustrated in FIG. 3, chassis 50 further includes a
pair of spaced mounting blocks 258 and 260. Block 258 is
formed with a central body 261 and a pair of spaced
pedestals 262 and 264 which extend outwardly from opposite
ends of a surface 266 of the body. A pair of posts 268 and
270 extend from opposite ends of body 261 of block 258 with
a threaded hole 272 extending longitudinally through the
body and the posts. Block 260 is formed in identical
fashion with a body 274 and spaced pedestals 276 and 278
extending from one surface of the body. A pair of posts
280 and 282 extend from opposite ends of the body 274 and a
threaded hole 284 extends longitudinally through the body
and the posts.
Referring again to FIG. 3, chassis 50 includes a
housing 286 which is generally of cylindrical shape. One
side 288 of housing 286 is completely open while the other
side 290 is formed with a smaller opening 292. Also, side
290 is formed with spaced holes 294 and 296. An opening
298 is formed in the peripheral surface 300 of housing
286. Chassis 50 further includes a retaining ring 302.
In assembly of the components of chassis 50,sleeves 168
and 170 are positioned so that camming elements 180 and 182
are located between cam surfaces 164 and 166 and camming
element 184 is located adjacent to an associated cam
surface on retractor 142. The forward ends of springs 154
and 156 are positioned in mating pockets of retractor 142
and the rear ends of the springs are positioned over
fingers 158 and 160. This forms a retractor subassembly.
The retractor subassembly is then located so that
sleeve 168 is positioned through and extends outwardly from
the axial opening of sleeve 190. In this position,
retractor 142 i5 located in the space between legs 194 and
196 and close to the inner surface of base 192. Retainer
162 is formed with a pair of spaced slots 304 and 306 which
2(~a3 ~ 9~
rest over tabs 226 and 228 of case 188 thereby placing
springs 154 and 156 in a contained position for subsequent
compression.
Cap assembly 256 is then positioned over sleeve 170
with tabs 206, 208, 212 and 214 of case 188 being located
in and through holes 240, 242, 244, 246, respectively.
In this fashion, retractor 142 the inward ends of
sleeves 168 and 170, spring 154 and 156 and retainer 162
are contained within the enclosure formed by the securance
of cap assembly 256 with case 188.
Pedestals 262 and 264 of block 258 are positioned in
notches 200 and 210, respectively of case 188 and pedestals
276 and 278 of block 260 are positioned in notches 202 and
216, respectively, of the case. Housing 286 is then
manipulated 60 that sleeve 168 extends outwardly from
opening 292 of the housing and sleeve 170 extends outwardly
from open side 288 of the housing. In this arrangement,
the secured cap assembly 256 and case 188, and the elements
contained therein as noted above, are located within
housing 286 with lips 150 and 152 of retractor 142 exposed
through opening 298 of the housing.
Retaining ring 302 is positioned about the threaded
portion of sleeve 190 and against side 290 of housing 286
to retain the elements of chassis 50 in the assembly as
described above.
It is noted that in the assembled chassis 50, the
threaded holes 272 and 284 of blocks 258 and 260,
receptively, are aligned with slots 236 and 238,
respectively, of cap assembly 256 and holes 294 and 296,
respectively, of housing 286. Also, as illustrated in FIG.
1, rose liner 38 is positioned over sleeve 170 and the
threaded portion of sleeve 248 of cap assembly 256 and
located ad~acent the open side 288 of housing 286. In this
position, screw holes 68 of rose liner 38 are aligned with
--` 20~3~ 9~
the threaded holes 272 and 284 of blocks 258 and 260,
respectively. Screws can then be placed through screw
holes 68 of rose liner 38 and threadedly secured within one
end of holes 272 and 284 of blocks 258 and 260,
respectively, to secure the rose liner with the chassis 50.
Referring now to FIGS. 1 and 3, latch assembly 52
includes a latch case 308 which is secured at one end
thereof to a front plate 309. Latchbolt 54 is contained
partially within case 308 and extends outwardly therefrom
to the extended position and through an opening in front
plate 309. It is noted that latchbolt 54 is retractible
into case 308 to a retracted or unlatched position.
Therefore, latchbolt 54 is movable between the extended or
latched position and the retracted or unlatched position.
As viewed in FIG. 3, a tail piece or link 310 is formed
with a head 312 and lateral through hole 314 at one end
thereof. Link 310 is formed with a T-shaped tail 316 at
the other end thereof and includes cross arms 318 and 320.
Head 312 is located within a slot (not shown) formed in
rear of latchbolt 54 and is pivotally secured thereto by a
pin 322 which is inserted through aligned holes, including
a hole 324, formed in the latchbolt and hole 314 formed in
the head.
Head 312 and the portion of latchbolt 54 to which the
head i8 attached are contained within case 308. Tail 316
extends from the rear of case 308 and is designed to be
positioned eventually through opening 298 of housing 286
with cross arms 318 and 320 being located behind lips 150
and 152 of retractor 142. In this fashion, upon rotation
of sleeves 168 or 170, camming elements 180 and 182 will
engage cam surfaces 164 and 166 to urge retractor 142
rearwardly against the biasing of springs 154 and 156. As
retractor 142 is moved rearwardly, link 310 is pulled with
the retractor to withdraw latchbolt to the retracted
position.
2~319~'
In further assembly of the components of cylindrical
lock assembly 20 of FIG. l, case 308 of latch assembly 52
is positioned within an opening (not shown) in the edge of
a door 326 (FIG. 2) which communicates with a larger door
opening which later receives chassis 50. Chassis 50 with
attached rose liner 38 is then inserted through the larger
door opening in door 326 where the door opening is slightly
larger in diameter than the diameter of housing 286. As
chassis 50 is moved into the larger opening, the chassis
engages and becomes attached to the tail-end of latch case
308. Also, tabs 72 of rose liner 38 are moved into notches
in the door and the rose liner is flush with the adjacent
surface of the door. In this position, housing 286 is
located within the door opening and sleeves 168 and 170
extend from opposite sides of the door. Tail 316 of link
310 is then attached to retractor 142 in the manner
previously described and plate 309 is secured to the edge
of door 326 in a conventional manner. Rose liner 26 is
then moved over sleeve 168 and toward door 326 whereby tabs
72 are moved into notches formed in the adjacent surface of
the door and screw holes 68 are aligned with the other ends
of threaded holes 272 and 284 of blocks 258 and 260,
respectively. Thereafter, a hex nut 319 having a hex
flange 321 and a sleeve section 323 with a threaded axial
hole 325 is threadedly mounted onto sleeve 190 until the
hex flange seats in the depression 64 of rose liner 26.
Screws, such as screws 327, are then positioned through
holes 68 of rose liner 26 and threadedly into holes 272 and
284 to secure the rose liner in the assembled position. In
this position, the head of screw 327 is located adjacent
the periphery of an adjacent flat of hex flange 321 so that
the screw head prevents the hex nut 319 from loosening.
It is noted that in assembling rose liners 26 and 38 in
the manner described above, slots 60 of rose liner 26 are
2~5319~
-14-
aligned with corresponding slots 60 of rose liner 38.
Cassettes 28 and 40 are then positioned over sleeves
168 and 170 so that tabs 186 are positioned within
longitudinal slots formed in the cylindrical opening of
arbors 96 of the cassettes. In this manner, arbors 96 are
keyed to sleeves 168 and 170 to rotate upon rotation of the
sleeves. As cassettes 28 and 40 are moved over sleeves 168
and 170, pads 82 of the cassettes are located in respective
slots 60 of rose liners 26 and 38, respectively. As
cassettes 28 and 40 are assembled in this fashion, posts 84
and 86 of each of the cassettes, are located with
corresponding openings (not shown) in door 326. In this
arrangement, post 84 of cassette 40 is axially aligned with
post 86 of cassette 28 and post 86 of cassette 40 is
axially aligned with post 84 of cassette 28. The threaded
end of a screw 329 is placed through unthreaded hole 92 of
post 86 from the outer face 90 of cassette 28 and into
threaded hole 88 of post 84 of cassette 40. In similar
fashion, the threaded end of another screw 329 is placed
through unthreaded hole 92 of post 86 from the outer face
of cassette 40 and into threaded hole 88 of post 86 of
cassette 28. The screws 329 are then tightened to draw
cassettes 28 and 40 to a secure position on opposite sides
of door 326 whereby the heads of the screws come to rest in
countersunk holes in the outer faces 90 of the cassettes in
alignment with post holes 86.
Roses 30 and 42 are then positioned over cassettes 28
and 40, respectively, and are held in assembly by a dimple
and detent arrangement (not shown) formed in complimentary
fashion in the roses and cassettes. Other arrangements
could be used to secure roses 30 and 42 with cassettes 28
and 40, respectively, such as, for example, a dimple and
L-shaped slot arrangement (not shown). One end of turn
button 36 is then positioned within sleeve 168 to mate with
2 ~ 9 ~
conventional locking facilities within chassis 50 to permit
selective locking of latchbolt 54 in the extended position
upon turning of the turn button. Insert 34 is positioned
within an inward opening of protrusion 130 of lever 32.
Thereafter, opening 138 of lever 32 is positioned onto and
over sleeve 168 so that finger-grip end 140 of turn button
36 extends through the outward end of opening 138.
It is noted that turn button 36 is spring-biased
outwardly from sleeve 168 but is formed with a flange which
precludes movement of the button axially outwardly from
opening 138 other than the extended finger-grip end 140.
It is further noted that a pair of spaced longitudinal ribs
are formed radially inwardly within opening 132 of lever 32
which fit into slots 174 and 178 of sleeve 168 to
facilitate rotation of the sleeve upon actuation of the
lever. Since arbor 96 is keyed to sleeve 168 by tab 186 on
the underside of the sleeve, spring 94 will be compressed
upon actuation of lever 32, by an operator. Compressed
spring 94 will provide the force to return lever 32 to its
home position upon release thereof by the operator.
Opening 132 of lever 32 is formed with a transverse slot or
depression in hub 128 and is positioned for alignment with
a slot 330 formed in sleeve 168. A spring-biased detent or
catch plate extends through slot 330 and into the
depression of opening 132 to retain lever 32 with sleeve
168. A small hole extends from the outer surface of hub
128 and communicates with the depression in opening 132 to
facilitate insertion of an implement to retract the
spring-biased detent and permit extraction of lever 32 from
the assembly.
Cylinder lock 44 is positioned within the axial opening
132 of hub 128 o~ lever 46 whereby the rib 122 and cover
124 are moved through and beyond lever slot 136 and into
opening 134 of protrusion 130. Insert 48 is then assembled
~3~9~
-16-
with lever 46 so that a portion of the insert covers slot
136 and another portion covers opening 134. This provides
an exterior cover for slot 136 and opening 134 which blends
structurally with and follows the contours of adjacent
exterior portions of hub 128 and protrusion 130.
Lever 46, with cylinder lock 44 and insert 48 assembled
therewith, is then manipulated to position axial opening
132 over sleeve 170. Ribs which are formed within opening
132 are moved into slot 174 of the sleeve and a slot of the
sleeve which is diametrically opposite slot 174. Further,
rib 122 and cover 124 of lock assembly 44 are moved into a
slot on the far side of sleeve 170 equally spaced from slot
174 and the diametrically opposite slot. Eventually, a
portion of the spring-biased detent or catch plate extends
through slot 330 (FIG. 3) and sleeve 170 moves into a
transverse slot or depression in hub 128 of lever 46 to
retain the lever with sleeve 170 to complete assembly of
cylindrical lock assembly 20. It is noted that sleeve 170
is formed with the same three-slot arrangement as sleeve
168 which is formed with slots 174, 176 and 178. Sleeves
168 and 170 are thereby interchangeable by merely rotating
the sleeves vertically through one hundred and eighty
degrees whereby slot 174 is on the bottom for the postion
of sleeve 168 and is on the top for the position of sleeve
170.
Referring to FIG. 6, a lock mechanism 332 is
illustrated with a portion of the elements of FIG. 1 to
show an embodiment of a lock mechanism which functions with
cylindrical lock assembly 20. It is to be understood that
other lock mechanisms could be used without departing from
the spirit and scope of applicants' invention.
As illustrated, sleeves 168 and 170 are located on
opposite side6 of retractor 142 of chassis 50. Interposed
between sleeve 170 and retractor 142 are an auxiliary
9 ~
-17-
sleeve or rollback 334, a plunger assembly 336 and a
locking dog 338. Plunger assembly 336 includes a plunger
head 340, a spring 342, a plunger body 344 and a pin 346.
Spring 342 and head 340 are inserted into an opening 348
formed axially in one end of body 344. Pin 346 is then
inserted through an elongated slot 350 and into a hole 352
formed in head 340. Spring 342 normally urges head 340
outwardly from opening 348 but is prevented from moving out
of the opening by virtue of the assembly of pin 346. Also,
since pin 346 is located within elongated slot 350, head
340 is permitted to travel axially with respect to opening
348 within the defined limits of the length of the slot.
Auxiliary sleeve 334 is formed with an axial opening
354 at one end thereof and a cover 356 at the other end
thereof which is formed with a centrally located cross slot
358 located for reception of tailpiece 116 of cylinder lock
44. A camming element 360 is formed at the open end of
auxiliary sleeve 334. Locking dog 338 is formed with an
axial hole 362 and an ear 364 which extends radially from
the hole. The free end of ear 364 is always contained
within slot 254 of sleeve 248 (FIG. 3) to prevent rotation
of dog 338 but to permit axial movement thereof.
A linkage bar 366 is positioned on the outboard side of
sleeve 168 in axial alignment therewith as viewed in FIG.
6. Linkage bar 366 is formed by riveting together two flat
strips 368 and 370 (FIG. 7) of metal. Strips 368 and 370
are formed with spring-biased fingers 372 and 374,
respectively, along an intermediate edge, which flare away
from the assembled strips as shown in FIG. 7. Strips 368
and 370 are also formed with tabs 376 and 378,
respectively, which combine in assembly to form tab 380 of
linkage bar 366. A cup-shaped cap 382 is attached to the
outboard end of linkage bar 366 and is formed with a pair
of oppositely spaced holes 384 and a slot 386. The
~31~
-18-
opposite end 388 is reduced in width to form shoulders 390.
Turn button 36 is formed with a pair of oppositely
spaced inwardly projecting tabs 392. Turn button 36 is
positioned over cap 382 so that tabs 392 are placed into
holes 384 to retain the button with the cap and with
linkage bar 366.
In assembly, linkage bar 366 with turn button 36 are
moved axially so that end 388 is first moved through sleeve
168, retractor 142 and opening 362 of dog 338. Opening 362
of dog 338 is designed to permit entry of end 388 and to
permit the end and bar 366 to be rotated independently of
the dog when turn button 36 is rotated and to permit
shoulder 390 to move the dog axially. Plunger assembly 336
is inserted into opening 354 of auxiliary sleeve 334 which,
in turn is positioned within opening 172 of sleeve 170. In
this position, camming element 360 of auxiliary sleeve 334
is located adjacent to camming element 184 of sleeve 170.
Linkage bar 366 is moved further inwardly to move dog
338 further within sleeve 248 (FIG. 3) to a position in the
vicinity of opening 172 of sleeve 170 adjacent camming
element 184. In this position ear 364 of dog 338 is
located for selective positioning into a slot 394 formed in
sleeve 170. Plunger body 344 is pressing against end 388
of linkage bar 366 and dog 338 to provide spring biasing of
the linkage bar and turn button 36 by virtue of spring 342.
As linkage bar 366 is moved through sleeve 168, fingers
372 and 374 move through a passage internally of the sleeve
where they are pressed generally together and then spring
back to the position shown in FIG. 7. This permits the
free ends of fingers 372 and 374 to be positioned to engage
shoulders within sleeve 168 to preclude complete retraction
of linkage bar 366 from within the sleeve but to permit
limited axial movement therein.
2 ~
--19--
When linkage bar 366 is in the unlocked position, the
bar is prevented from being rotated by a first tab blocking
structure within sleeve 168 which prevents tab 380 from
moving in an arcing direction. In this position, spring
342 is biasing dog 338 so that ear 364 is outside of slot
394 of sleeve 170 whereby the sleeve can be rotated by
operation of lever 46. This results in movement of
latchbolt 54 from the latched position to the unlatched
position.
When it is desired to lock assembly 20 by use of turn
button 36, the button is pushed axially inward whereby tab
380 clears the first tab blocking structure within sleeve
168. Turn button 36 can now be rotated to move tab 380
through an arc to a position on the inboard side of a
second tab blocking structure within sleeve 168. When turn
button 36 is released, tab 380 engages the second tab
blocking structure and is pressed against the structure by
spring 342 to retain linkage bar 366 and the turn button in
this position.
As linkage bar 366 is moved inwardly and rotated as
described above, shoulders 390 move dog 338 further through
sleeve 248 (FIG. 3) to A position where ear 364 is located
in slot 394 of sleeve 170. This prevents sleeve 170 from
being turned whereby assembly 20 is the locked condition
with respect to operation of the assembly by use of outside
lever 46.
As previously described, cylinder lock 44 includes a
tailpiece 116 (FIG. 1) which extends toward the inboard
side of assembly 20. In assembling the components of
assembly 20, tailpiece 116 is inserted into slot 358. When
cylinder lock 44 is in the locked condition, tailpiece 116
is prevented from turning and assembly 20 is thereby locked
from the outside. In this condition, latchbolt S4 cannot
be moved from the latched position by operation of outside
~3~ '3
-20-
lever 46. When a key is inserted into cylinder lock 44 and
lock tumbler pins are thereby appropriately aligned, the
key can be turned which results in turning of tailpiece
116. This turns auxiliary sleeve 334 whereby camming
element 360 is moved to move retractor 142 and thereby
retract latchbolt 54.
Referring to FIG. 8, cylinder lock 44 includes cylinder
shell 112, cylinder plug 114, tailpiece 116, tailpiece
anchor plate 118 and threaded cap 120. Shell 112 is formed
with tumbler supporting rib 122 and cover 124.
Plug 114 is formed with flange 400 at the forward end
of a body 402 of the plug and with a front face 404. A key
slot 406 is formed in front face 404 and extends through
plug 114 in an axial direction and exits at a rear face 408
(FIG.9) thereof. A hole 410 is formed through body 402 in
an axial direction and is formed with a counterbored
portion 412. Another hole 414 is formed in rear face 408
and extends in an axial direction into body 402 but does
not extend through to front face 404. Simîlarly, hole 416
is formed in rear face 408 and into body 402 in an axial
direction but does not extend to front face 404. Further,
a slot 418 is formed in rear face 408 and extends radially
upwardly. Also, in the embodiment illustrated in FIG. 8,
plug 114 includes six tumbler-pin holes 420, formed
radially in body 402, all of which communicate with key
slot 406. Also, slots 421 and 423 are formed in rear face
408 between key slot 406 and holes 410 and 414,
respectively. With the formation of holes 410 and 414
being recessed in rear face 408, the alignment of slots 421
and 423 with the holes provides a cross slot 425 which is
in the horizontal orientation as viewed in FIG. 9. A
rearward extension 409 of body 402 is threaded and is
reduced in diameter relative to the body to form a shoulder
411 therewith.
-21-
Shell 112 is formed with a cylindrical body 422 having
an axial opening 424. Rib 122 is formed with six radially
arranged tumbler-pin holes 426 which communicate with
opening 424. Six tumbler pins 428, six pusher pins 430 and
six compression springs 432 are arranged to be inserted
into respective ones of holes 426. Cover 124 is then
assembled to retain pins 428 and 430 and springs 432 in the
assembled arrangement.
An actuator spring 434 is aligned for insertion into
the counterbored portion 412 of hole 410. An identifier
pin 436 is formed with a forward shank 438 and a rearward
shank 440 of a diameter larger than the diameter of the
forward shank. Pin 436 is insertible into hole 410 with
shank 438 being located in the forward portion of the hole
and shank 440 being located in the counterbored portion 412
of the hole.
A stop pin 442 is formed with a major portion 444 of a
first diameter and a rearward projection 446 of a diameter
smaller than the first diameter. A stop spring 450 is
axially aligned with pin 442 and both are positioned for
insertion into hole 416 formed in the rear face 408 of plug
114. A stabilizing pin 452 and an axially aligned actuator
spring 454 are aligned for insertion into hole 414 in the
rear face 408 of plug 114.
As viewed in FIGS. 8 and 10, an identifier actuator 456
i8 formed with a cross-bar body 458 with a pair of side
arms 460 and 462 extending forwardly from opposite sides of
the cross-bar body. A key block-out tab 464 extends
forwardly from the bottom of cross-bar body 458. An
upright tab 465 extends upwardly from the cross-bar body
458.
Tailpiece 116 is formed with a forward face 466 which
is aligned to be seated on the rear face of body 458 of
actuator 456. Also, opposite intermediate sides of forward
~3~
face 466 are formed with protrusions 468 which extend along
and taper into the sides of the tailpiece 116 for a short
distance. A rear end 470 of tailpiece 116 is formed with
inwardly tapered surfaces 472. Tailpiece anchor plate 118
is circular in shape and is formed centrally with a
rectangular opening 474 through which the tapered end of
tailpiece 116 is inserted. A pair of tapered grooves 476
are formed in opposite side walls of opening 474 to receive
the tapered protrusions 468 along the sides of the body of
tailpiece 116. This arrangement permits some free movement
of tailpiece 116 relative to anchor plate 118 but
facilitates retention of the tailpiece with the cylinder
lock 44. A pair of spaced rounded slots 478 and 480 are
formed in the periphery of anchor plate 118 and are spaced
ninety degrees apart.
Cap 120 is formed with an axial opening 482
which is threaded. The periphery of cap 120 is knurled to
facilitate gripping thereof. As viewed in FIG. 11, cap 120
i8 formed with a front face 484 having an axial opening 486
which communicates with threaded opening 482. The wall of
opening 486 is ~ormed with a plurality of slots 488 which
combine to form a scalloped edge.
In assembly, plug 114 is positioned within opening 424
of shell 112 so that holes 420 of the plug are aligned with
holes 426 of the shell. Tumbler pins 428, pusher pins 430
and springs 430 are inserted into holes 426 with the
tumbler pins being located within holes 420 of plug 114~
Cover 124 is then attached to the top of rib 122 to retain
the pins 428 and 430, and the springs 432, as assembled.
Springs 434, 450 and 454 are placed in respective holes
410, 416 and 414 with spring 434 being located in the
counterbored portion 412.
2~ 6
Identifier pin 436 is positioned within hole 410 of
plug 114 with shank 438 extending into the forward portion
of hole 410 and shank 440 located within counterbored
portion 412. Stop pin 442 is inserted into hole 416 of
plug 114 with projection 446 extending toward cap 120.
Stabilizer pin 452 is positioned within hole 414 of plug
114.
Identifier actuator 456 is positioned adjacent the rear
face 408 of plug 114 so that arm 460 of the actuator is
positioned in engagement with the rear face of pin 452.
Tab 464 of actuator 456 is positioned within key slot 406
of plug 114 and tab 459 is positioned within key slot 406
of plug 114 and tab 459 is located within slot 418 of the
plug.
Tailpiece 116 is positioned so that forward face 466 is
positioned against actuator 456. Anchor plate 118 is
positioned over tailpiece 116 and cap 120 is threadedly
positioned on threaded extension 4Qs of plug 114. As cap
120 is drawn toward a tight position, actuator 456 presses
pins 436 and 452 into their respective holes 410 and 414
against the biasing compression of springs 434 and 454,
respectively.
Pin 442 is positioned through slot 478 of anchor plate
118 with projection 446 being located in the vicinity of
slots 488. In order to tighten cap 120 in place, pin 442
is depressed to allow the cap to be threadedly rotated on
threaded extension 409 of plug 114. After cap 120 is
located in a tightened position, the cap is positioned to
permit projection 446 of pin 442 to extend into the
adjacent most slot 488 on the cap. Since major portion 444
of pin 442 is too large to extend into any of the slots
488, the pin remains biased by spring 450 against the inner
wall of the cap 120 adjacent the slots. In this position,
projection 446 of pin 442 extends into one of the slots 488
2~3~6
of cap 120 to prevent any rotation of the cap. If
adjustment of cap 120 is required, projection 446 is
depressed against the biasing of spring 450 to clear the
respective slot 488. Cap 120 is then rotated and
projection 446 then locates in another slot 488 to lock the
cap in the adjusted position. When turn button 36 is
operated to lock assembly 20 from inside door 326, free
floating tailpiece 116 is moved toward plug 114 thereby
moving identifier actuator 456 further in the direction of
the plug. With this movement, arm 460 moves identifier pin
436 further into hole 410 of plug 114 against the biasing
action of spring 434. This causes the forward end of shank
438 to move out of hole 410 and extend a slight distance
beyond front face 404 of plug 114. This provides an
indication to someone on the outside of door 326 that lock
assembly 20 is locked from inside the door. This is
particularly useful in a hotel environment where hotel
personnel may wish to enter the room for cleaning purposes,
for example, but will recognize that door 326 is locked
from the inside.
When pin 436 is pressed to cause the forward end of
shank 438 to extend beyond front face 404 of plug 114,
actuator 456 could become tilted if only arm 460 was
performing the forward actuating action. To counter this
possibility, arm 462 is formed on actuator 456 and extends
forwardly in spaced relation with arm 460 the same distance
as arm 460 extends from body 458. Arm 462 engages pin 452
which provides a balancing effect when depressing pin 436.
Thus, as actuator 456 is moved, springs 434 and 454 provide
a balancing influence upon the actuator so that pin 436 is
moved axially within opening 410 of plug 114 while the
actuator is maintained in an untilted orientation.
When actuator 456 is moved forward as noted above, tab
464 is moved into key slot 406. If an entry is attempted
by inserting a key into slot 406 from front face 404, the
key could not be inserted a sufficient distance to effect
alignment of the tumbler pins 428 and push pins 430 for
operation of lock 44. Therefore, tab 464 functions as a
key block out which is selectively activated upon locking
the lock assembly 20 by use of turn button 36 from inside
door 326.
A special key for emergency use by hotel personnel can
be made and includes a notched or cut-out section which
allows the key to be fully inserted into key slot 406 and
facilitates the opening of lock 44.
If the forward portion of shank 438 which extends
beyond face 404 of plug 114 is bent, for example, by
tampering, actuator 456 could remain in position with
block-out tab 464 preventing operation of lock 44 by a
conventional key. However, a notched hotel key would
by-pass tab 464 and open the lock whereby spring 454 and
pin 452 would urge actuator 456 rearwardly although pin 436
would not be retracted because of bent shank 438. A
standard key can thereafter operate lock 44.
In an environment where privacy is desired such as, for
example, a hotel room, a pushbutton is accessible to
facilitate forward movement of actuator 456 and identifier
pin 436. In a first option of pushbutton operation, the
pushbutton is attached to the cap end of linkage bar 366
(FIG. 6) in place of turn button 36. Bar 366 is assembled
in the manner previously described and extends through
retractor 142. Referring to FIGS. 1 and 6, end 388 of
linkage bar 366 is moved to a position to eventually engage
the outboard end of tailpiece 116.
When the pushbutton is depressed, the free ends of the
legs of a spring-biased U-shaped element within sleeve 168
are moved into a pair of spaced slots 500 and 502 (FIG. 6)
formed on one edge of bar 366 to retain the bar in the
-26-
depressed position. As bar 366 is being depressed, end 388
thereof engages and pushes tailpiece 116 toward plug 114
whereby tab 464 (FIG. 8) of actuator 456 is moved into key
slot 406 to thereby block full entry of the key. In this
manner, cylinder lock 44 cannot be operated by a regular
key.
If the pushbutton is depressed while door 326 is open,
when the door is closed and latchbolt 54 is momentarily
depressed, a mechanism within sleeve 168 will remove the
free ends of legs of the U-shaped element from slots 500
and 502 and linkage bar 366 will return to its unoperated
position.
In another mode, a spanner key having bifurcated pins
is inserted into the pushbutton whereafter the pushbutton
can be depressed and then rotated. In this mode, the legs
of the U-shaped element do not enter slots 500 and 502.
However, upon rotation of the pushbutton, fingers 372 and
374 of bar 366 are moved behind a projection within sleeve
168 to retain the bar in the depressed and rotated
position. Again, tailpiece 116 is moved to place tab 464
into key slot 406 and thereby block the key as before.
If this operation is effected while door 326 is open,
bar 366 will remain in the depressed and rotated position
when the door is closed. This permits hotel personnel to
lock the door to prevent entry with an ordinary key. The
notched hotel security key can be used by authorized
personnel to bypass the blocking effect of tab 464 and
unlock cylinder lock 44 to permit opening of door 326.
A catch plate is located within sleeve 170 (FIG. 1) and
i5 spring biased to extend partially through slot 330 (FIG.
3). When lever 46 is placed over sleeve 170, the catch
plate will be biased into a depression ~ormed on the inner
wall o~ lever opening 132. A small hole extends through
hub 128 of lever 46 and communicates with the depression to
~ ~ ~3 3 ~ ~ ~
-27-
facilitate depression of the catch plate when it is desired
to remove the lever.
When a lever operator, such as lever 46, is used, key
slot 406 and rib 122 of lock 44 are aligned horizontally.
Also, tailpiece 116 is aligned horizontally. In this
position, tailpiece 116 prevents depression of the catch
plate within sleeve 170 so that lever 46 cannot be
removed. When the key is used to operate lock 44 and turn
tailpiece 116, the catch plate can now be depressed and
lever 46 can be removed.
When a user desires to change from the lever system to
a knob system, key slot 406 is arranged vertically which
results in tailpiece 116 being arranged vertically. Since
the tailpiece 116 must be in the horizontal orientation to
prevent the catch plate from being depressed, the change to
the knob system with a tailpiece of fixed orientation will
not permit the use of the same cylinder lock for both lever
and knob systems. In the past, separate cylinder locks
were made for the lever and knob systems and were not
interchangeable.
With cylinder lock 44, when switching from a lever
sy~tem to a knob system, cap 120 can be removed along with
anchor plate 118 and tailpiece 116. Plate 118 and
tailpiece 116 are then turned ninety degrees from the
previous orientation of alignment with key slot 406 and rib
122 ~o that face 466 of the tailpiece is aligned with
crossbar body 458 of actuator 456. Tailpiece 116, anchor
plate 118 and cap 120 are reassembled with plug 114 in the
manner previously described with stop pin 442 being
po~itioned in slot 478 of the plate and one of the slots
488 to lock the cap in the tightened position.
Thus, the same cylinder lock 44 can be used with a
lever or a knob whereby the orientation of tailpiece 116
can be ad~usted to insure that the catch plate cannot be
2~3 ~ ~
-28-
depressed without key operation of the lock regardless of
whether a lever system or a knob system is used.
In general, the above-described embodiment is not to be
construed as limiting the breadth of the present
invention. Modifications, and other alternative
constructions, will be apparent which are within the spirit
and scope of the invention as defined in the appended
claims.
