An Improved Lock for Doors, Shutters, and the like.
Year: 1891

page_text: Date of Application, 26th Nov:, 1891
Complete Specification Left, 26th Aug., 1892-Accepted, 1st Oct., 1832
PROVISIONAL SPECIFICATION.
An Improved Lock for Doors, Shutters, and the like.
We THE BOSTWICK GATE AND SHUTTER COMPANY LIMITED, 73 Queen
Victoria Street in the City of London, Manufacturers and JAMES HODGES, of the
Citadel Lock Works, Bloomsbury, Wolverhampton in the County of Stafford,
Lock Manufacturer do hereby declare the nature of this invention to be as
follows:-
1..
This invention relates to an improved lock for doors, shutters and the like,
which is particularly applicable to sliding or collapsable doors; gates, or shutters.
The said lock is so constructed that it is self locking.
According to this invention a spring bolt is so arranged in the lock case that its
head projects through the front of the lock; this bolt engages with a crank which
in turn engages with, a locking bolt to which is fixed a stud or pivot 'on' which
works a claw or clutch bolt.
When the door, gate or shutter is being closed the projecting part of the spring-
bolt strikes against the gate post for example which forces it into the lock and so
operates the crank and also releases the locking-bolt which is then forced forward
by a spring thus actuating the clutch bolt and automatically locking the gate or
the like which can only be unlocked by the action of the key.
The key is employed to force back the locking-bolt which brings with it the
clutch, bolt and operates the crank, thus allowing the a spring to force forward the
spring bolt which is again set ready for locking.
i.
Levers of the ordinary kind with extra safety levers or tumblers will be used
the locking bolt which operates the claw or clutch-bolt.
on
HASELTINE, LAKE & Co.,.
45, Southampton Buildings, W.C., Agents for the Applicants.
An Improved Lock for Doors, Shutters; and the like.
We, THE BOSTWICK GATE AND SHUTTER COMPANY LIMITED of 73 Queen
Victoria Street, in the City of London, Manufacturers, and JAMES HODGES of the
Citadel Lock Works, Bloomsbury Wolverhampton in the County of Stafford, 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 :-
This invention relates to an improved lock for doors, shutters and the like, which
is particularly applicable to sliding or collapsable doors, gates, or shutters.
The said lock is so constructed that it locks itself when the door or the like is
closed. According to our invention we provide a spring controlled bolt the head
of which projects through the face plate of the lock when the claw or clutch bolt
is not in engagement with the door or gate-post. The said projecting head is
struck by the door or gate-post when the door or the like is shut and is forced
inward thereby acting to release the said claw or clutch bolt and lock the door or
gate in a manner hereinafter described.
In order that our invention may be clearly understood we will now proceed to
describe the same with reference to the accompanying drawings, in which
Figure 1 is a view of the lock with one of its side plates removed, the claw or
clutch-bolt not being in engagement with the door or gate-post.

page_text: Figure 2 is a similar view the claw or clutch-bolt, having been released and being
in engagement with the door or gate post.
A is the box or case furnished with openings A' A² in the face plate for the
spring bolt B and claw or clutch-bolt E. The spring bolt B is shown in Figure 1
with its head B' projecting from the face plate. C is a crank pivoted at C' and
engaging by its head C with a slot B2 in the end of the spring bolt B.
The other end 3 of the crank is adapted to engage with a projection D¹ on the
locking bolt D. The said locking bolt is provided with a stud D which works in
a slot E in the claw-bolt E pivoted on the stud E². The bolt B is controlled by
the spring F which tends to force the said bolt outwards. The bolt D is controlled
by the spring in the usual manner. The action of the lock is as follows:- When
the projecting head B₁ of the spring bolt B is struck by the door- or gate-post and
forced into the lock, the crank C is thereby rotated on its pivot until the end C³ is
disengaged from the part D', and the locking bolt D thus released. The bolt D is
impelled forward by its spring G and by means of the stud D2 forces the claw
bolt E forward into engagement with the door- or gate-post as shewn in Figure 2.
To unlock the door or gate a key is used to force back the locking bolt D and
thus retract the claw bolt E to the position shewn in Figure 1. The tail C of the
crank then re-engages with the projection D¹ and allows the bolt B to be again
projected by the spring F.
Safety levers H of the ordinary kind are shewn connected with the locking
bolt D and tumblers or other devices may likewise be used.
Having now, particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is.
1. A lock for a door, gate or the like, having a spring-controlled bolt which is
adapted to be forced inwards to rotate a pivoted lever. and thereby release the
locking bolt, for the purpose specified.
2. A lock constructed substantially as described with reference to the accom-
panying drawings, and operating as specified.
Dated this 18th day of August 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.