Note: Descriptions are shown in the official language in which they were submitted.
BACKGROUND OF THE INVENTION
This invention relates in general to a
lockset and more particularly to a lockset assembly
in which the latch bolt is extendable into a ~ead
bolt function.
In my co-pending Patent Applica-tion Ser.
No. 464,312, entitled Lockset Assembly, there is
disclosed a lockset in which the latch bolt is
extendahle from a latching position into a fully
extended dead bolt posi-tion. According to the
function shown in that application, the latch bolt is
extendable into its dead bolt position either by a
key operated cylinder on the outside operating member
or a turn button on the inside operating member. The
inside operating member can always retract the latch
bolt whether in the latching position or dead bolt
position. However, it is possible to adopt the basic
mechanism shown in that application ~or other
functions.
SUMMARY OF THE INVENTION
-
It is an object of the present invention to
provide an improved lockset assembly which ~unctions
both as a latch bolt and a dead bolt.
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More specifically, it is an object of the
present invention to provide a lockset assembly in
which the latch bolt is automatically extendable
into a dead bolt position when the door is closed.
Yet another object of the present invention is
to provide a lockset assembly in which the latch
bolt is automatically extendable into a dead bolt
position when the door is closed and will remain in
the latching position when the door is open.
A further object of the present invention is
the provision of a lockset assembly in which when an
operating member is in the '~lock" position, the
latch bolt will move into its dead bolt position
automatically when the door is closed, and when the
operating member is in the "unlock" position, the
latch bolt will remain in the latching position
after the door is closed.
Yet another object of the present invention is
the provision of a lockset utilizing a latch
assembly having a latch bolt movable into an
extended dead bolt position and including means for
maintaining the latch bolt in its intermediate
latching position.
These and other objects of the present
invention may be accomplished by the provision of
the lockset to be described below.
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DESCRIPTION OF THE DRAWINGS
Figure 1 is a horizontal sectional view taken
along the horizontal axis of the lockset showing the
lockset mounted within a metal door frame and the
latch bolt in its dead bolt or fully extended
positon;
Figure 2 is a side view in elevation of the
latch bolt assembly with the latch bolt in its dead
bolt or fully extended position;
Figure 3 is a view similar to that of Figure 2
but showing the latch bolt in its latching position;
Figure 4 is a view similar to that of Figure 2
but showing the latch bolt in its open or fully
retracted position;
Figure 5 is a view similar to that of Figure 2,
but showing a bolt moving forward to its extended
position after the door has been closed;
Figure 6 is an end view of the latch assembly
taken along the lines 6 6 of Figure 2;
Figure 7 is a perspective view of the thumb
piece assembly used in connection with the inside
operating member of the lockset;
Figure 8 is a view taken along the lines 8-8 of
Figure 1 and showing the relationship of the turn
button actuator with respect to the pinion extension
when the turn button is in the locked position;
Figure 9 is a view similar to Figure 8 but
showing the relative position of the turn button
actuator with respect to the pinion extension when
the turn button is in the unlocked position;
Figure 10 is a cross-sectional view of the
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latch assembly taken along the lines 10-10 of Figure
1 ;
Figure 11 is an elevational view, partially
in section of a modified form of a latch assembly for
different function and showing the latch bolt in its
extended dead bolt position; and
Figure 12 is a view similar to Figure 11,
but showing the latch bolt in its intermediate latch-
ing position.
DETAILED DESCRIPTION
The basic construction of the lockset of
this invention is described in detail in the above-
mentioned copending application and reference should
be made thereto for a detailed description. -Gener-
ally, according to the drawings and in particularFigure 1 of this application, the lockset mechanism 1
of the present invention is shown mounted in a metal
door 2 and includes an outside hand operated member 4
and an inside hand operated member 6 which in the
preferred embodiment are an outside lever 8 and an
inside lever 10. The outside and inside levers 8 and
10 are used to retract a latch bolt 12 of the latch
bolt assembly 14 of the lockset mechanism from a
strike box 16 and strike plate 18 mounted on the door
jam 20 in conventional fashion. The outside operat-
ing assembly 27 of the lockset may be provided with a
key operated lock cylinder 22 mounted within the
outside lever 8 and the inside operating assembly 38
of the lockset may be provided with a turn button 26
mounted within the inside lever 10.
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The outside operating assembly 27 includes the
outside lever 8 which is rotatably mounted within an
outside rose 28 and includes a generally square-
shaped projection 30 extending into the outside rose
28 and is held in place for rotational motion with
respect thereto by a retaining ring 31. Positioned
within the outside rose 28 is an outside operating
cassette 32 having upper and lower ear-like
projections (not shown) which extend therefrom and
which fit into suitable grooves ~not shown) on the
outer surface of a latch bolt assembly holder 34
which is positioned within the door 2. The latch
bolt assembly holder 34 provides a mechanism for
mounting the latch bolt assembly 14 which contains
the latch bolt 12 and includes a suitable slot 36
into which the latch bolt assembly 14 may be
inserted.
In a similar manner, an inside operating
assembly 38 includes the inside lever 10 which is
pivotally mounted within an inside rose 40 and
includes a generally square-shaped projection 42
extending thereinto and which has a retaining ring
44 attached thereto so that the inside lever 10 is
mounted for relative rotation with respect to the
inside rose 40 in a like manner as the outside
operating assembly 27. An inside operating cassette
46 is mounted within the inside rose 40 and includes
upper and lower ear-like projections (not shown)
which extend into grooves (not shown) on the latch
bolt assembly holder 34. A spindle 48 extends
through the latch bolt assembly 14 and between the
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inside and outside operating cassettes 27 and 38 in a
direction perpendicular to the axis of movement oE
the latch bolt 12. The lockset may be assembled in
-the door as described in the above-mentioned Patent
Application Ser. No. 464,312.
The outside operating cassette 32 includes
a housing 50 which has a central opening 52 into
which the projection 30 of the outside lever 8
extends. An actuating member 54 is mounted in the
outside operating cassette 32 with a boss 56 thereof
mounted in the opening 52 in the housing 50 and
includes a generally squared-shaped opening 58 into
which extends the generally square-shaped projection
30 of the outside lever 8. The actuating member 54
includes a base portion 60 and a reduced elongated
tail portion 62 which extends from the base portion
60. The forward end of the tail portion 62 is pro-
. vided with a raised V-shaped cam surface 64 extending
inwardly past the plane of the inner surface of the
tail portion 62.
A spring plate 66 is mounted within the
housing 50 of the outside operating cassette 32 in
overlapping relationship with the actuating member
54. At its forward end the spring plate 66 includes
two spaced fingers 68 (only one of which is shown),
each having a cam follower surface thereon adapted to
be engaged by the V-shaped cam surface 64 on the
actuating member 54. The spring plate 66 is biased
forwardly in the direction of extension of the latch
bolt 14 into engagement with the cam surface 64 on
the actuating member 54 by means of two lever springs
(not shown).
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A generally flat rack plate 70 is mounted
within the housing 84 in overlapping relationship
with the spring plate 66. Gear teeth 72 are provided
on the rack plate 70 formi.ng a rack thereon which
extends parallel to axis of the latch bolt assembly
14. The forward end of the rack plate 70 is provided
with a notch 72 into which extends a lug portion 74
extending inwardly from the forward end of the
actuating member 54 when the rack plate 70 is in its
forward position to prevent rotation of the actuating
member 54. The rack plate 70 is biased into its
forward position by a spring member 76. The rack
plate 70 and spring plate 66 are mounted in the hous-
ing 50 for linear movement in the direction of the
movement of the latch bolt 12 and are so configured
that rearward movement of the spring plate 66 causes
the rack plate 70 to move rearward as more fully
described in the above-mentioned patent application.
A pinion member 78 extends perpendicular to
the axis of the latch bolt assembly 14 and is mounted
within the outer operating cassette 32 and includes a
set of gear teeth 80 which are in mating engagement
with the gear teeth 72 on -the rack plate 70. The
pinion member 78 also includes a tubular extension
portion 82 which extends through the spring plate 66,
actuating member 54, and housing 50 into an opening
84 in the outside lever 8.
The head portion 86 of -the pinion member 78
has a generally rectangular slot 88 therein of a mating
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cross-section with that of the spindle 48 which
extends therethrough. The tubular extension portion
82 includes internal opposed ribs 90 therein (only
one of which is shown3 which are engagable by a
drive member 92 connected to the lock cylinder 22 in
the outside lever 8 to rotate the pinion member 78
from its extended dead bolt position to its
retracted position or the latch bolt position
depending upon how far the key is turned.
In accordance with the above described
arrangement and again as described in the above-
mentioned patent application, the actuating member
54 has pivotable movement about the axis of the
spindle 48 and is operably attached to the outside
lever 8. The spring plate 66 and rack plate 70 are
mounted within the housing 50 for rectilinear motion
in a direction parallel to the motion of the latch
bolt 12 of the latch bolt assembly 14.
A cover member 94 is provided for the outside
operating cassette 32 to contain the operative parts
within the outside cassette 32 as a unit.
The inside operating assembly 38 includes the
inside rose 40 and the inside lever 10 attached
thereto in a similar manner as the outside operating
assembly 27 by a retaining ring 96. The inside
operating cassette 46 includes basically the same
elements and is constructed similar to that of the
outside operating cassette 32 which has been
described above.
In general inside operating cassette 46
includes an inside housing 98 in which is mounted
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for pivotal movement an inside actuating member
100. The inside actuating member 100 includes a
central generally square-shaped opening 102 into
which the square-shaped projection 42 of the inside
lever 10 projects as well as a raised V-shaped cam
portion 104. A spring plate 106 having cam surfaces
108 (only one of which is shown) for engagement with
the cam portion 104 on the actuating member 100 is
mounted in the inside housing 98. As in the case of
the outside operating mechanism, the spring plate
106 is spring biased forwardly by suitable spring
members (not shown).
A rack plate 110 having gear teeth 112 is
mounted in the inside housing 98 in overlapping
relationship with the spring plate 106. The rack
plate 110 may be spring biased forwardly by a spring
member 114 although this spring may be omitted.
However, in contrast to the rack plate 70 of the
outside operating assembly 27, the forward end of
the rack plate 110 of the inside operating assembly
38 i5 foreshortened and does not include a notch so
that when it is in its forward dead bolt position as
shown in Figure 1 the forward end thereof does not
come into engagement with the lug portion 116 on the
actuating member 100. As a result, the actuating
member 100 is free to pivot when the rack plate 110
is in its forward dead bolt position.
An inside pinion member 118 includes gear teeth
120 thereon in mating engagement with the teeth 112
on the rack plate 110. The pinion member 118
includes a tubular extension 122 having opposed ribs
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124, 126 therein which extends through the inside
operating cassette 46 into an opening 128 in the
inside lever 10. The head portion 130 of the pinion
member 118 also includes a slot 132 through which
one end of the spindle 48 extends. A cover 133 is
attached to the housing 98 to contain the operating
mechanisms.
Referring to Figures 1 and 7, the turn button
26 includes a knob 134 having a rod 136 extending
inwardly therefrom. The end of the rod 136 includes
two opposed radial extending ear portions 138 and
140 for engaging the opposed ribs 124 and 126 in the
tubular extension 122 of the inside pinion member
118. The rod 136 extends through and has relative
rotation with a cam member 142 which has a cam slot
144 therein. A cam follower 146 in the form of a
roll pin extends radially out from the rod 136 into
the cam slot 144. A spring 148 is provided between
the cam member 142 and the knob 144 to bias the knob
144 outwardly.
The cam member 142 includes a bump 150 on its
circumference which mates with an indention (not
shown) in the opening 128 in the inside lever 10 to
prevent rotation of the cam member 142 with respect
25 to the lever 10. The cam member 142 also includes
inwardly projecting tongues 152 having shoulders 154
thereon for retaining the cam member 142 within the
inside lever 10. When mounted in the lever 10, the
rod 136 extends into the pinion member 118 of the
inside operating assembly.
The cam slot 144 extends partially around the
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circumference of the body of the cam member 142 and
includes a generally straight portion 156 and an
axially extending locking groove 158 which forms a
stop shoulder for the cam follower 146. When the
knob 144 is rotated from its locked position wherein
the cam follower 146 is in the straight portion 156
of the cam slot 144 to its unlocked position, the
cam follower 146 will reach the axially extending
locking groove 158. At this point, the knob 144 and
rod 136 will move outwardly under the force of the
spring 148, whereby the stop shoulder will prevent
relative rotation of the rod 136 and cam member 142
holding the knob 134 in the unlocked position until
the knob 144 is manually pushed inwardly and rotated.
Referring to Figures 2-5 and 10, the latch bolt
12 of the latch bolt assembly 14 is shown movable
between its extended dead bolt position in Figure 2,
its intermediate latching position in Figure 3 and
its f~lly retracted open position in ~igure 4. The
latch bolt assembly 14 includes a latch case 160
having two spaced latch plates 162 and 164 (~igure
1) extending rearwardly therefrom. The latch plates
162 and 164 are held mounted together by means of
bushings 166. The latch bolt assembly 14 is mounted
within the slot 36 in the latch bolt assembly holder
34 with the screw 167 which attaches the latch bolt
assembly 14 to the latch bolt assembly holder 38
extending through the rearward one of the bushings
166.
A hub member 168 upon which two lever plates
170 are mounted for rotation therewith is mounted
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between the two latch plates 162 and 164 in suitable
openings therein. The hub member 168 has a generally
rectangular bore 172 therethrough of a shape to
receive the spindle 48. The bolt 12 is mounted
within the latch case 160 and has an arm 174 (Figure
10) extending rearwardly therefrom toward the lever
plates 170. The arm 174 is pivotably attached at its
forward end to the bolt 12 and at its rearward end
has a pivot pin 176 extending through an elongated
slot 178 in each of the lever plates 170. A guide
180 having opposed side walls in which the arm 174 is
positioned is also pivotally attached to the rearward
end of the bolt 12.
As described in the above-mentioned patent
application, a spring biased dowel 182 is mounted in
the bolt 12 and has its end face engaging one corner
on the forward portion of the arm 174. This serves
to bias the arm 174 in a direction such that the
pivot pin 176 will engage the upper edges 184 of the
latch plates 162 and 164.
The upper edges 184 of the latch plates 162
and 164 include a rearward cutout portion 186 forming
rearward facing stop shoulders 188 which is engage-
able by the pin 176 to stop the latch bolt 12 in its
latching position. Forward of the cutout portion 186
the upper edges slope downwardly toward another cut-
out portion which forms a notch 190 to releasably
retain the bolt 12 in the extended, dead bolt
position. A spring 191 extends between -the side
plates 162 and 164 and the latch bolt 12 to bias the
bolt 12 toward its forward, dead bolt
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position.
A latch release plunger 192 is mounted in a
slot 194 in the bolt and has a forwardly extending
strike abutting portion 196 extending forwardly out
of the latch case 160 and cam portion 198 extending
rearward from the case 160. The latch release
plunger 192 is positioned on the side of the bolt 12
opposite the bevel 200. The cam portion 198 is
forked and includes upper and lower rearward facing
cam surfaces 202. An intermediate portion 204 of
the latch release plunger 192 is channel-shpaed in
which a spring 206 is mounted between a shoulder 208
and an inturned projection 210 on the latch case 160
to bias the latch release plunger 192 into its
forward position. When the latch release plunger
192 is biased into its forward position, the forward
face 2t2 of the cam portion 198 abuts the rearwall
214 (Fig. 10) of the latch case 160. In this
position, the strike abutting portion 196 extends
outwardly adjacent the end of the bolt 122
A pair of rearward facing shoulders 216 on the
bolt 12 are adapted to engage a pair of forwardly
facing shoulders 218 on the latch release plunger so
that upon inwardly movement of the bolt 12 when it
is being retracted from its latching position to its
open position, it will move the latch release
plunger 192 inwardly into its open position as seen
in Figure 4. When the latch release plunger 192 is
in its open position, the rearward facing cam
surfaces 202 are rearward of the stop shoulder 108
on the latch plate 162.
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The operation of the operating elements of
the inside and outside cassettes are substantially
the same as described in the above said patent appli-
cation Ser. No. 464,312. Accordingly, the operations
of such elements will not be described in detail
except as needed for an understanding of the present
invention. When the door is closed, and the turn
button 26 is in its locking position, i.e. with the
cam follower 146 in the straight portion 156 of the
cam slot 144, the latch bolt 12 will be in its
extended dead bolt position as shown in Figure 2 and
the latch release plunger 192 will be held in its
rearward open position by the strike 18. In this
position, the outside lever 10 cannot be rotated
since the rack plate 70 is in its Eorward position
and that the lug portion 74 on the actuating member
54 is positioned in the notch 72 thereof. This
arrangement prevents the outside lever 8 from being
turned since the actuating member 54 attached thereto
cannot be rotated. As there is no notch in the rack
plate 110 of the inside operating assembly 38, the
inside lever 10 is free to rotate. Upon rotation of
the inside lever 10, th~ actuating member 100 pivots
about the axis of the spindle 48 and the cam portion
104 thereof engages the cam surfaces 108 on -the ends
of the sp ing plate 106 causing the spring plate 108
to move rearwardly in a linear direction. Due to the
engagement of the spring plate 108 with the rack
plate 110, the rack plate 110 also moves rearwardly
in a linear direction causing -the pinion member 118
to rotate
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thereby rotating the spindle 48 and the hub member
168 of the latch bolt assembly 14 causing the
complete retraction of the latch bolt 12 into the
position substantially as shown in Figure 4. When
the door is opened and the operator releases the
inside lever 10, the latch bolt 14 and latch release
plunger 192 will move forward under the influence of
their respective springs. The latch bolt 14 will
move forward until the pivot pin 176 engages the
stop shoulder 188 in the upper edges of the latch
plates 162 and 164 thereby holding the latch bolt 14
in its latching position. As the door is closed and
moves past the strike 18, the latch bolt 14 and
latch release plunger 192 are moved into their open
position by the strike 18 as shown in Figure 4. In
this position, the pivot pin 176 is rearward of the
cam surfaces 202 of the latch release plunger 192.
When the door is completely closed, the latch bolt
14 moves forwardly under the influence of the latch
spring 191 into the strike box 16 while the latch
release plunger 192 is held in its rearward open
position by the strike 18 as shown in ~igure 5. As
the bolt 12 moves forward into its dead bolt
position, the cam surfaces 202 on the latch release
plunger 192 cause the pivot pin 176 to move upwardly
over the stop shoulder 188 on the upper edges 184 of
the latch plates 162 and 164 enabling the pivot pin
176 to continue forward until it engages the forward
pin receiving notch 1~0 in which position the latch
bolt 12 is in its fully extended dead bolt
position. When the turn button 26 i~ moved into its
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locked position, i.e. the cam follower 146 is
positioned in the locking groove 156 in the cam slot
144, due to the interconnection between the ear 138
and 140 portions on the rod 136 of the turn button
26 and the ribs 124 and 126 in the extension portion
of the pinion member 118, the inside pinion member
118 will be rotated thereby rotating the spindle 148
to rotate the hub 168 of the latch assembly 14 into
its latching position thereby retracting the latch
bolt 12 into its latching position. In this
position, the pinion member 118 and ears 138 and 140
on the rod 136 of the turn button 26 will be
positioned as shown in Figure 9 so that rotation of
the pinion member 118 in a counter-clockwise
direction is prevented by the ribs 124 and 126
engaging the ears 138 and 140 on the rod 135 of the
turn button. Since the cam follower 146 must be
manually released from the locking groove 158 in the
cam slot 144 by depressing the knob 134 and turning,
the latch bolt 12 will be held in its intermediate
position even if the latch release plunger 192 is
moved rearwardly as by closing the door. Thus, the
latch bolt 12 only moves forwardly from its open
position to its latching position when the turn
button 26 is in its unlocked position.
When the latch bolt 12 is in its intermediate
or latching position, the outside rack plate 70 is
held in its intermediate position wherein the notch
72 is out of engagement with the lug portion 74 on
the actuating member 54 Accordingly~ the actuating
member 54 is free to rotate whereby the outside
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lever 10 can be rotated to move the latch bolt 12
from its latching position to its open position to
open the door.
The lock cylinder 22, by virtue of its drive
member 92 engaging the ribs 90 of the outside pinion
member 92, can be used to open the door when the
door is locked with the latch bolt 12 in its fully
extended dead bolt position. However, the cylinder
22 and key cannot be used to change the function
from either locked to unlocked or from unlocked to
locked.
Figures 11 and 12 show a modified form of a
latch bolt assembly 220 which may be used when both
the outside and inside operating members 4 and 6
utilize a key operated cylinder member with a drive
member extending therefrom into their respective
inside and outside pinion to engage the ribs. The
latch bolt assembly generally similar to that
described in connection with Figures 2-5 and 10, and
includes a latch case 160 having two spaced latch
plates 162 extending rearwardly therefrom (only one
of which is shown3. The latch plates 162 are held
mounted together by means of bushings 166. A hub
member 168 on which two lever plates 170 tonly one
of which is shown~ are mounted for rotation
therewith, is mounted between the two latch plates
in suitable openings therein. The hub member 168
has a generally rectangular bore 17~ therethrough of
a shape to receive the spindle 48. The bolt 12 is
mounted with the latch case 160 and has an arm 174
extending rearwardly therefrom toward the lever
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plates 170. An arm 174 is pivotally attached at its
forward end and the bolt 12 as its rearward end has
a pivot pin 176 extending through elongated slots
178 in each of the lever plates 170O A spring
biased dowel such as shown in the previous
embodiment may be mounted in the bolt 12 and a bolt
spring 191 extends between the side plates and the
latch bolt 12 to bias the bolt 12 toward its forward
dead bolt position. In this case, the hub 168
includes a generally V-shaped tab portion 222. A
spring member 224 has an end portion wrapped
partially around the rear bushing 166 with an
intermediate portion wrapped around the screw 167
which attaches the latch bolt assembly 14 to the
latch bolt assembly holder 38. The spring also
includes a forwardly and downwardly extending
intermediate portion 226 and a forward end portion
228 which extends generally vertical as shown in
Figure 11.
When the latch bolt is in its fully extended
dead bolt position, the tail on the hub engages the
intermediate portion 226 of the spring 224 to bias
the latch bolt into its forward position wherein the
pivot pin is positioned within a notch 230 in the
forward end of the cut out portion 232 on the upper
edges of the latch plates 162. When the latch bolt
12 is moved into its intermediate latching position,
the tail piece engages the generally vertical
portion 226 of a spring which biases the hub 222
against rotation in a clockwise direction into the
open posltion thereby holding the latch bolt in its
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intermediate latching position. In this embodiment,
the key operated cylinders in either the inside or
outside member can be used to retract the dead bolt
from its extended position into the intermediate
position and also can be used to move the hub member
against the bias of the spring to move the dead bolt
from its intermediate position into its locked
position.
While reference has been made above to
specific embodiments it will be apparent to those
skilled in the art that various modifications and
alterations may be made thereto without departing
from the spirit of the present invention.
Therefore, it is intended that the scope of this
invention be ascertained by reference to the
following claims.
