Improvements in Locks.
Year: 1889

page_text: Date of Application, 28th Mar., 1889
Complete Specification Left, 30th Dec., 1889-Accepted, 8th Mar., 1890
FIOVIDIONAL DE
Improvements in Locks.
1, JOSEPH KAYE, of Bank House, Kirkstall, Leeds, in the County of York,
Lock Manufacturer, do hereby declare the nature of this invention to be as
follows:-
-
The object of this invention is to give greater security and strength to lover
locks.
To accomplish the above, I fix the levers to revolve on or in a fulcrum at the inner
end of the lock case, and the other ends of the levers project within the solid part
of the lock bolt, the levers have projections at their ends which enter notches which
are cut in the solid bolt above and below the levers, so that when the levers are
moved the proper distance by the bit of the key, the bolt is released and can be
moved by the key revolving in the ordinary way when the bolt is again secured by
the projections of the levers entering the notch in the solid part of the bolt.
I set the key to lift the levers at a point nearer the fulcrum than the holding
end of the lever so that a slight variation in the movement of the levers at the point
where they are acted on by the key prevents the lock bolt being released, and so
cause the lock to be more difficult to pick.
The part of the levers which the key acts on are made to vary to suit the notches
in the key, so that the lovers are all moved the same distance, and are less likely to
break the lever springs.
Dated this 26th day of March 1889.
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in Locks.
I, JOSEPH KAYE, of Bank House, Kirkstall, Leeds, in the County of York
Lock Manufacturer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
The object of this invention is to give, greater security and strength to lever locks
made on the mortice, rim or flush principle; and consists in fixing the levers upon
a fulcrum pin at the inner end of the lock case, and for the opposite ends of the
levers to project within the lock bolt, which is made to carry its full thickness for
some distance inside the lock case and in which notches or recesses are cut on each
side of a slot, for engaging with the ends of the levers for securing the lock bolt
in its required position and for preventing the lock being opened except by its
proper key.
In explaining my invention more in detail, reference is made to the accompanying
sheet of drawings, in which Fig. 1. represents a view of a lock made according to my
invention, in which the cover plate is removed and the lock bolt withdrawn.
Fig. 2. is a similar view with the lock bolt "shot," the dotted lines showing a
further extension of the lock bolt and the position of the levers when operated by a
master key.
Fig. 3. represents a combined lock and latch, and shows a modified arrangement
for retaining the lock in position, and

page_text: "
Fig. 4. a similar view with the lock bolt "shot or protruding beyond the face of
lock case.
In all the figures similar letters indicate similar parts where they appear.
The levers A. may be of any number as in ordinary locks, and are mounted on a
fulcrum pin B. fixed at the inner end of the lock case C., the other ends of the levers
at B terminate within a slot S. cut in the lock bolt D. of the same strength as that
portion of the bolt which on locking projects beyond the face plate E.
On the top and bottom of the slot S there are cut notches F. for receiving the
projections A and A² by which the lock bolt D is retained in position, by
projections A when locked.
The key hole G is placed at a point near the fulcrum pin B. so that a slight
movement of the levers at the point where they are acted on by the key, is to some
extent multiplied at the end A¹ A' thereby making the lock more sensitive and
difficult to open except by a key having the wards accurately cut to fit the
levers.
The width of the levers at the projections A¹ and A2 is equal to the width of the
slot S. and when the levers are moved the proper distance by the bit of the key, so
that the wide ends of all the levers at A¹ and A² correspond in height with the slot S.
the bolt D can then be operated by revolving the key in the ordinary manner until
the projections A¹ are opposite the next notch F into which they engage and retain the
lock bolt D in that position; and when using a grand master key, the lock bolt D
may be operated to the extent shown by dotted lines; the ends of the levers are then
allowed to descend to the position shown by dotted lines, thus supporting the lock
bolt by the onds resting against the curved portion at H. between the thin portion
or plate D and the full thickness of lock bolt at D, the arm or projection H¹ at the
opposite end of each lover being against the flange of the lock case, they act as a
direct support to the lock bolt.
Should any of the wards in the key not correspond with the levers A so that all
are operated the same distance, the projections A¹ of one or more levers will remain
some distance within the notch F. or the ends A will be raised so far as to engage
with the top notch F thus keeping the lock bolt D secure.
Figs. 3 and 4 show a modified arrangement of my improvement, in which case the
full thickness of the lock bolt D is extended for some distance within the lock case.
Instead of cutting a slot with notches at each side thereof as before described, my
object may be accomplished by cutting a recess at J. of a shape somewhat as shown;
the width of the narrow portion of the recess or opening being equal to the width
of the end of the levers at A¹ so that when all the levers are raised by the key to
the proper height, the lock bolt D. may be moved in the direction required; the
levers A. affording a direct support to the lock bolt, both when withdrawn and "shot"
by the end of the levers at A coming in contact with the solid or thick part of the
lock bolt, and the arm A3 at the opposite end of each lever being against the
lock case.
The latch tongue K. lever I and spiral spring, and spindle S comprise a latch of
the well known push and pull principle, and in both arrangements the lock bolts
inside the case are guided and supported at the rear by a thin plate extension D¹.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is :-
:-
1. Locks in which are combined a series of levers A. having projecting ends A¹
and A2 for engaging in notches cut in the lock bolt D all arranged substantially in
the manner shown and described.
2. Locks, in which the levers A having projecting ends A1 and A2 act as a direct
support to the lock bolt D by one end engaging or in contact with the lock bolt, and
the other against some portion of the lock case.

page_text: 3. The combination of a latchet tongue K. lever L. and spiral spring S. with a
series of levers A. having enlarged ends at A' for engaging in the recesses J cut in
the lock bolt D. all arranged substantially in the manner shown and described.
4. Locks in which the levers A having ends as at A' act as a direct support to the
lock bolt D substantially in the manner as herein before described and shown.
Dated this 28th day of December 1889.
JOHN WAUGH,
Agent.