Year: 1888

page_text: Date of Application, 20th July, 1888
Complete Specification Left, 23rd Apr., 1889
Complete Specification Accepted, 1st June. 1889
The object of my invention is to automatically wedge a door tight to when it is
closed without hard slamming and for the Lock to have great security and lasting
properties.
I accomplish my object in the folling manner.
I make the lock bolt to shoot streight out from the face of the door by the force of
spiral springs set to push. I form cog-teeth in one edge of the lock-bolt and fix a
wheel in the lock case and form a sufficient number of teeth at the edge of the wheel
to work in gear with the teeth in the lock-bolt so as to draw in the bolt when the
wheel is turned by a spindle which is fixed in the centre of the wheel.
When the lock-bolt is sufficiently drawn in to allow the door to be opened the
bolt is held in by a prop, catch, or hook, preferably a prop, which revolves on a
fulcrum.
When the door is closed the prop, catch, or hook is released automatically by the
closing of the door and so allows the springs to push out the lock-bolt into the striking
plate and wedged the door tight to.
The lock-bolt is made in the shape of a wedge at its outer side which presses
against the striking plate when it is driven into the striking plate by the springs.
The striking plate is shaped to fit the wedge shaped side of the bolt, and so form a
large working surface to prevent wear of the bolt and striking plate.
A roller may be fixed in the face of the lock-bolt which bears against the striking
plate when the door closes for the purpose of reducting the friction.

page_text: COMPLETE SPECIFICATION.
Improvements in Safety Locks for Railway Carriage Doors and
other Doors.
I, JOSEPH KAYE, of 93, High Holborn, London, W.C. 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 my invention is to automatically wedge a door tight in its place when
closed without hard slamming; also for the lock to have great security and lasting
properties and consists in arranging the lock bolt to shoot out straight from the
door by the force of springs, and for the purpose of withdrawing the lock bolt from
the striking plate, rack teeth may be formed on one side of the same which gear with
a pinion mounted in the lock case; the lock bolt when withdrawn being held back 1
by an arm mounted on a pin, and which is automatically released on closing the door
by the lock bolt coming in contact with the incline of the striking plate, by which it
is moved inwards, the springs compressed, and a bar released, so that on the lock bolt
arriving opposite an opening it is forced out by the before mentioned springs, and
being formed wedge shaped, fitting the angle of the flange of the striking plate, holds
the door tight in its place.
In the accompanying drawings.
Fig. 1. represents a view of a lock constructed according to my invention, the lock
bolt being withdrawn.
Fig. 2. is a similar view of a lock and a portion of a striking plate, the lock bolt 2
being "shot" or in the position when the door is locked.
Fig. 3. a plan of the same with the striking plate in section cut through the opening
for the reception of lock bolt.
Fig. 4. is a front view of the striking plate.
Fig. 5. a side view, and,
Fig. 6. a section through line a. b.
The lock case A. is of the ordinary construction, and mounted in the same through
a slot hole in outer flange B., is a lock bolt C. on the edge of which within the lock
casing is formed a number of teeth D. gearing with the teeth of a pinion E.
supported by preference in a circular bearing Y. projecting into the interior of the 3
lock case..
Under the narrow portion of the lock bolt bar 1 place one or more spiral springs S.
on guide bars F. the latter of which freely pass through holes in the back flange of

page_text: lock case A. the spiral springs being compressed between the said flange and lock
bolt C. so that when the lock bolt is moved back to the position shown by Fig. 1.
the springs S. are further compressed, the guide bars F sliding through holes in
the flange.
When the bolt C., is sufficiently drawn in by the turning of pinion E. by a key, or
handle to open the door, which when opened, the lock bolt is held back by the end of
arm G. engaging with the curved portion at C¹ of lock bolt; the arm being mounted
on pin H. and operated by spiral spring J. placed on a guide bar; the arm G. on
being moved into position for engaging with lock bolt as described, causes the bar K.
to slide outwards to the position shown by Fig. 1.
On closing the door, and the end of lock bolt C. coming in contact with the
incline I. on striking plate M. it causes the lock bolt C. to slide inwards such a
distance, that the curved portion at C¹ is free of the arm G. thereby allowing the said
arm to move, on the end of bar K. sliding against the striking plate, until the arm G.
is clear of the lock bolt; so that on the end of wedge shaped lock bolt C. arriving
opposite the opening N. in striking plate M. it is forced outward by the compressed
spiral springs S, thereby securing the door; the portion of the lock bolt outside the
lock case A. which enters the striking plate being inclined on one surface, that is,
made wedge shaped, thinner at the end than towards the lock case, so that on the
inclined or taper side of lock bolt sliding through the opening N. against the
flange M of striking plate, the door when closed is drawn tight against the stile,
thereby keeping the door tight when closed and preventing it shaking.
My improved lock having the end of lock bolt made wedge shaped as before
described may be constructed as shown by Figs. 7. and 8, the former illustration
showing an arrangement by which the lock bolt C. may be withdrawn from the
striking plate without the aid of a pinion and rack teeth. The plate of the lock bolt
at is cut away for the reception of one or more compressed springs S. which are
placed on bars free to pass through holes in support P. the opposite end of the bars
being in contact with the lock bolt, and by the spiral springs S being compressed,
they will push the lock bolt C. out as shown, and secure the door on the liberation of
the catch R. by the end of the lock bolt C. coming in contact with the striking plate
and the operation of bar K. as before described.
The lock bolt C. having its end wedge shaped in the manner as before described
is withdrawn by turning the cam T. in either direction in its circular bearing Y. one
of the surfaces at X. coming in contact with its corresponding projection U forming
part of lock bolt bar, thereby sliding the lock bolt Cuntil the catch R. falls into
position for retaining the lock bolt ready for being liberated when closing the door,
by the end of lock bolt C and end of bar K. coming in contact with the striking plate
in the manner as before described.
The lock bolt C. in Fig. 8. is shown in gear with a pinion E. and held back by
catch R. the bolt being recessed and having a spiral spring S. therein on a bar, the
spring being compressed between one end and the support P. so that on the liberation
of the catch R. in the manner as hereinbefore described, the lock bolt C. will shoot
out and secure the door tight in its place, by the inclined side of lock bolt sliding
against the flange of striking plate as shown by Fig. 3.
my
Having now particularly described and ascertained the nature of said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. Locks having the projecting portion of the lock bolt made of a varying
thickness or of wedge shaped section substantially as shown and described so that on
closing a door the inclined surface of the lock bolt on sliding into the striking plate
draws the door towards the stile thereby wedging or keeping the door tight.
2. Locks having the lock bolt C. protruding some distance beyond the face B. of
lock case which on coming in contact with the striking plate is actuated and thereby
releases the arin G. or catch R. for the purpose as hereinbefore set forth.

page_text: 3. Locks in which is combined a circular bearing Y within the lock case
whereby the wearing surface of the opening mechanism is increased and made more
durable.
4. The combination of a lock bolt C. having teeth therein with a pinion E. having
a portion of its circumference so constructed that on rotating it comes in contact with
the lock bar thereby preventing any undue rotation of the pinion and strain on the
teeth on sudden stoppage.