Improvements in Locks for Sliding Doors and other Purposes.
Year: 1886

page_text: Date of Application, 6th Apr., 1886.
Complete Left, 6th Jan., 1887.
Complete Accepted, 8th Feb., 1887.
JOSEPH KAYE 93 High Holborn London in the County of Middlesex Lock
Manufacturer do hereby declare the nature of this invention to be as follows:-
:-
My object is to have a strong and secure lock without any projection either on the
lock or striking plate when unlocked. I accomplish my object by hanging a strong
hook on a pin inside the lock case behind the face of the lock, and in front of the
ordinary lock holt so that when the lock bolt is pushed forward by the key, the bolt
pushes forward the hook which revolves on its fulcrum, and hooks into a plate on the
door jamb, or desk lid, or wherever the plate is fixed for the purpose of fastening to.
When the bolt is shot it forms a wedge between the hook and lock face and so holds
the hook firm in possition. I construct the hook with a projection on it at its inner
side, so that when the bolt is withdrawn the projection engages with a part of the bolt
and draws in the hook from its holding and within the face of the lock. Another hook
at the opposite side of the bolt may be employed.
JOSEPH KAYE.
COMPLETE SPECIFICATION.
Improvements in Locks for Sliding Doors and other Purposes.
I, JOSEPH KAYE, of 933 High Holborn, London, in the County of Middlesex, 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 the construction of locks in such a manner, that
whilst making the door or lid secure, there is no projection either on the striking
I, JOSEPH KAYE, of 93 High Holborn, London, in the County of Middlesex, 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 the construction of locks in such a manner, that
whilst making the door or lid secure, there is no projection either on the striking

page_text: plate or lock when the catches or hooks which serve the same purpose as the ordinary
bolt, are withdrawn for allowing the door or lid to be opened: and consists in mounting
the catches or hooks on pins, and placing between the former a sliding bolt, which
operates and acts as a support between them, thereby rendering it impossible to force
the catches or hooks back until operated by the key; as is explained by reference to the
accompanying drawings, in which Fig. I represents a view of the interior of a lock
with the catches hooked to the striking plate, Fig. 2 a cross section through line a.
with the key inserted in the lock, Fig. 3 a view of the interior shewing the catches or
hooks partly opened, Fig. 4 a view of the interior with the levers or tumblers removed
and the catches or hooks in the position they are when hooked to the striking plate,
and Fig. 5 a similar view shewing the catches or hooks moved clear of the striking
plate.
b
The lock case plate is indicated by the letter A, and may be fitted with any number
or variety of levers or tumblers B, which are of the ordinary construction and operated
by the key K in the usual manner. The lock case is also fitted with a sliding bolt C
of such length that, when it is "shot" by the key for locking does not project like an
ordinary bolt beyond the face of the lock flange F, and is provided with a cross bar C³,
which projects at each side thereof inio recesses formed in the catches or hooks D,
which are mounied so as to be capable of movement on the screw pins D'
:
When the key K is turned so as to move the sliding bolt. C towards the lock
flange F, the ends of the cross bar being in the recesses of the catches or hooks D,
cause the latter to be moved in the direction of the arrows as shown by Fig. 3, until
they are perpendicular as shown by Figs. 1 and 4; the catches or hooks 1), passing
through openings in the striking plate G, hook to the back of the latter, thereby
securing the door or lid; and by the cross har extending on each side and operating
the catches or hooks D in the manner described, the laffer are wedged in position
rendering it impossible, when the door or lid is locked for the catches or hooks to be
forced back except when operated by the key.
The foregoing description applies to a lock having two catches or hooks D) fitted
thereto, but my object may be accomplished by applying one hook as shown by Fig. 6,
in which case I cut away from one edge of the sliding bolt the cross bar (and
allow the said sliding bolt to move against the projecting flange H on the lock plate
the cross bar on the other edge of the sliding bolt projecting and engaging with the
catch or hook D, which is operated with the key actuating the sliding boli in the
manner as before described.
I am aware of locks having been made prior to the date of this application in which
catches or hooks were used for securing the door or lid, but the said catches or hooks
were operated by a plate and attached to the sliding bolt in the lock which, when
shot by the key, protruded beyond the lock frame to an exient similar to that of the
bolt of an ordinary lock.
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what I claim is :
Locks, in which is or are mounted to the lock case plate A, one or more catches or
hooks D, operated by a sliding bolt through the instrumentality of a key K,
substantially in the manner and for the purpose set forth.