Note: Descriptions are shown in the official language in which they were submitted.
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The invention relates to a cylinder lock assembly
comprising an outer cylinder enclosing a rotatable inner
cylinder and an end member closing, at least partlyJ an
open rear end of the outer cylinder.
In a cylinder lock assembly Or the kind referred toJ
the cylinder lock has a certain key combination. I~ unautho-
rized use o~ the lock occurs, or if the owner of the lock
changes 9 the combination of the lock should prererably be
changeda This means that either the whole cylinder lock has
to be replacedJ which is rather expensive, orJ alternatively,
the combination Or the cylinder lock has to be changed by re~
placing only some combination determining parts thereor. The
latter operation is made possible by providing the ou~er cylinder
with means allowing removal of the combination determining parts,
that is, the inner cylinder with its locking elements, rrom the
outer cylînder.
In known cylinder lock assemblies, the attachment
o~ interior parts Or the lock is often very difficult to
release, which makes `the changing o~ the lock combination so
complicated that it usually is less expensive to replace the
whole lock.
Another problem with known cylinder lock assemblies
is the attachment o~ the cylinder lock into the lock mechanism
Or which it is a part. In many cases the attachment Or the
cylinder lock is so weak that it is possible to break the
,
~ attachment and thus remove the cylinder lock by force.
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The ob~ect of the invention is to solve the two
basic problems referred to above. The lnvention i5 characte-
rized in that the end member and the outer cylinder are provided
with mutually corresponding groove arrangements forming an
axially fully interlocking attachment means, and that the end
member is insertable in radi~l direction in~o the outer cylinder
ror attaching it thereto, whereby the assembly includes an
attachment locking member engaging the outer cylinder and the
end member for locking the end member to the outer cylinder in
a radial direction. This makes the ~astening of the end member
sufficiently strong to resist any possible axial load which
could be applied to break up the assembly or its attachment.
On the other hand, the end member can be quite easily removed,
upon ordinary dismounting o~ the cylinder lock, to allow
changing of the lock combination.
In a cylinder lock assembly according to the invention,
it is of special advantage to use a disc cylinder lock of the
kind originally described in U.~. patent 1 51~ 318. In a
cylinder loGk o~ this type, the rotatable inner cylinder en-
closes a ~umber of locking discs and is locked to the outercylinder by means of an axially extending locking bar partly
recieved in an axial groove in the interior sur~ace of the
outer cylinder. This axial groove and ths open rear end o~ the
outer cylinder makes it possible to remove the inner cylinder,
the locking bar, and the key combination determining locking
discs enclosed in the inner cylinder, All these parts o~ the
lock mechanism can be removed as one unit~ which makes it very
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easy to change the combination in such a lockO Only
the inner cylinder with its content~ has to be replaced by
another inner cylinder with locking discs arranged in another
way. The removed inner cylinder and its contents does not
have to be thrown away but can be used in another lock after
suitable rearrangement o~ the locking discs. These operations
cannot be made as easily in a pin cylinder lock, firstly,
because the inner cylinder cannot be axially extracted in its
locked position, because of the locking pins which are radially
arranged, and secondly,lbecause part of the pins belong to the
outer cylinder and they will easily ~all out and cause conrusion
when the inner cylinder is removed. Also other lock cylinder
types are less favourable in a lock assembly according to the
invention than ths disc cylinder lock referred to.
The end member can easily be secured to the outer
cylinder of the assembly by means o~ an attachment locking
memberJ partly received by chord grooves in the end member and
in the outer cylinder. These chord grooves ~orm Jointly a channel
or duct, into which the attachment locking member is inserted
The attachment locking member can be~ for instance, a pin or
a plate.
According to a preferredembodlment o~ the invention,
the assembly is provided with a latch member operated by the
inner cylinder. The latch member is arranged to move radially
guided by the encl member and the outer cylinder. The latch
member can at a same time act as a member securing the cylinder
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lock assembly in its proper place and also as a latch member of
a lock mechanism Or which the cylinder lock assembly is a part.
This simpliries the construction of the whole lock mechanism.
As an example o~ a lock mechanism) where the invention can be
used with advantage, the lock mechanism according to U.S. patent
3 21~ 65~ can be mentioned
A very strong latch-operating cylinder loc~ assembly
is obta~ned, if the latch described above is arranged to pass
through an opening in the outer cylinder so as to extend radially
out from the outer cylinder outside said opening. In this
embodiment the outer cylinder surrounds the latch at all sides -
which makes the assembly very strong, because the outer cylinder
can easily be made of a material, such as steel, being capable
o~ withstanding great stresses. The opening ~or the latch member
is suitably located at that slde of the outer cylinder, which is
opposite to the side ~rom which the end member is radially
inserted into its proper place. This gives the assembly a great
strength and a short over all length.
In the following, the invention will be described in
greater detail with reference to the attached drawings in which
- Figure 1 shows a sectional side view of a lock assembly
according to the invention,
- Figure 2 shows the section II-II of Figure 1,
- Figure 3 shows a side view of the outer cylinder of the lock
of Figure 1, partly in section~
- Figure 4 shows the section IV-IV o~ Figure 3,
- Figure 5 shows a lock assembly according to the invention -
mounted in a unit to be locked
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In the drawings, the numeral 1 lndicates the outer
cylinder of a cylinder lock. In this outer cylinder there is
a rotatable inner cylinder 2 enclos:Lng a plurality o~ locking
discs 3. An axial locking bar 4 is arranged in a slot in the
inner cylinder 2 between the outer cylinder 1 and the locking
dlscs ~. The outer cylinder 1 is provided with a groove 5
partly receiving the locking bar 4 :Ln its locking position9 that
is, the position in which it locks the inner cylinder 2 to the
outer cylinder 1. From this locking position the locking bar 4
is movable to a releasing position out form the groove 5, and
is then partly received by channel ~ormed ~ointly by notches
(not shown) in the periphera]. edges of the locking discs ~ when
they are brought to a certain position by turning the key of the
lock. When the locking bar 4 is in its releasing position the
inner cylinder 2 is rree to rotate inslde the outer cylinder 1,
It is rotated by turning ~urther the key o~ the lock and its
rotational movement is used to operate the locking mechanism
of which the cylinder lock is a part, in this case a latch 7.
The lock assembly ~urther comprises an end member 6
radially insertable into~the outer cylinder 1. The end member
comprises a protrusion 10 (Figure 2) and a groove 12 which
correspond to a groove 9 and a protrusion 11, respectively, ln
the outer cylinder 1. This mutually correspondlng groove
arrangement provides an axially ~ull~ interlocking attachment
o~ the end member 6. In the radial direction the end member 6
: is locked to the outer cylinder 1 by inserting an attachment
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locking member 14 into a channel or duct formed Jointly by
grooves 1~a and 1~b in the end member 6 and the outer cylinder 1,
respectively.
A number o~ springs 15 are arranged between the end
member 6 and the inner cylinder 2 to allow a certain dimensional
tolerance in the locking disc pile without disturbances in the
function of the lock. The same effect can be obtained by usin~,
in the conventional way axially somewhat flexible intermediate
discs between the locking discs 3,
The inner cylinder 2 is provided with a peg 16 moving
in a recess in the latch 7 and giving it a reciprocating movement
when the inner cylinder 2 is rotated. The latch 7 is guided by
the outer cylinder 1 and the end member 6 and moves in an opening
17 ~Figure 3) in the outer cylinder. Pre~erably a spring 8
should be used tourge the latch 7 outwards.
Fig. 5 discloses the fastening of the lock assembly by
means o~ the latch 7. The funct~onally innermost position of the
latch 7 is shown wlth rull lines and its outermost position
with dashed lines. The numeral 18 indicates a unit to be locked
having an opening 19 through which the latch 7 can move to and
from a recess 21 in a stationary element 20 to which the unit 18
can be lockeq. The latch 7 also keeps the cylinder lock assembly
in its proper place. In order to allow the cylinder lock
assembly to be properly ~itted in the unit 18 the latch 7 must
yield inwardly so much that it does not protrude outslde the
outer cylinder 1. Thls ylelding movement is made~possible by
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the spring 8 shown in Figure 1 and is outside the ra~ge of the
normal reciprocating movement of the latch 7 obtained by rotating
the inner cylinder 2.
The invention is not limited to the embodiment shown
but several modi~ications thereo~ are feasible within the scope
of the attached claims.
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