Improvements in Locks for Railway Carriage and the like Doors, and in Striking Plates therefor.
Year: 1899

page_text: Date of Application, 8th Mar., 1899
Complete Specification Left, 6th Dec., 1899-Accepted, 6th Jan.. 1900
Date of Application, 8th Mar., 1899
Complete Specification Left, 6th Dec., 1899-Accepted, 6th Jan.. 1900
PROVISIONAL SPECIFICATION.
Improvements in Locks for Railway Carriage and the like Doors, and
in Striking Plates therefor.
I, HENRY DEFRIES, of 147, Houndsditch, London, EC., Manufacturer, do
hereby declare the nature of this invention to be as follows:-
-
This invention relates more particularly to the class of locks or fastenings
used for railway carriage doors but is also applicable to other doors requiring
a self-locking device.
My invention consists of an improved lock of the type indicated, and of a
striking plate therefor.
The object of my invention is the construction of a lock having two
distinct bolts, so arranged that upon the door of the carriage being slammed
or closed, both bolts will automatically enter the striking plate and the handle
will be turned to the horizontal position. Upon turning the handle backwards
to open the door, the two bolts will be withdrawn.
In carrying out my invention I propose to arrange a sliding spring bolt or
latch above the main bolt which latter may be pivoted with its handle in the
usual manner. The lower or underside of this sliding bolt or latch is provided
with a dependent horn or projection which enters and engages with a recess
formed in the upper and inner face of the main bolt.
This horn or projection is recessed out on both sides and the extremity is of
larger size than its neck, and is rounded off on the side towards the front of
the lock.
This horn enters a correspondingly shaped recess in the upper or inner portion
of the main bolt when the latter is in its higher or unlocking position.
The main bolt is actuated by a toggle jointed lever which in turn is acted upon
by means of a spring. Above the pivot of the main bolt and upon its inner
face is a recess into which enters a rounded knob or roller of one link or limb
of the toggle-jointed lever, the opposite end of which lever is pivoted to the
lock casing. A suitable flat or other spring bears against this other limb or
link of the lever in such a manner that the first-mentioned link or a roller
on the same will be constantly impelled against the main bolt and tend to
force it to its horizontal or locked position.
When the main bolt is raised, the horn on the sliding bolt enters the recess
in the main bolt and these are so constructed that the main bolt is then held
in its raised position until the sliding bolt or latch is pushed inwards; the
main bolt being then released. returns to the horizontal position.
The sliding latch may be hollowed out and fitted with an internal spring by
means of which or by means of any other suitable arrangement, it normally
projects from the lock casing.
When the dependent horn from the sliding latch engages its recess in the
main bolt and locks the same the front end of the latch and of the main bolt .
project through the lock casing, both these projections being suitably bevelled
off

page_text: The striking plate has recesses formed to receive both bolts and is fitted
with bevelled surfaces, the lower or larger one being arranged somewhat in
advance of the upper one so that the main bolt strikes its bevelled surface
before the sliding latch makes contact with the upper bevelled surface.
When it is desired to open the door, the handle is turned in the ordinary
manner and the main bolt is raised towards its vertical position.
As it rises
the recess in the main bolt engages the horn dependent from the sliding latch
withdrawing this latter into the lock casing and being then held thereby the
sliding latch and the main bolt have then both been withdrawn into the lock
casing and the door is free to be opened.
6
1
1040
Improvements in Locks for Railway Carriage and the like Doors, and
in Striking Plates therefor.
1, HENRY DEFRIES, of 147, Houndsditch, London, E.C., 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 more particularly to the class of locks or fastenings
used for railway carriage doors but is also applicable to other doors requiring
a self-locking device.
My invention consists of an improved lock of the type indicated, and of a
striking plate therefor.
The precise object of my invention is the construction of a lock having two
distinct bolts, so arranged that upon the door of the carriage being slammed
or closed, both bolts will automatically enter the striking plate and the handle
will be turned to the horizontal position. Upon turning the handle backwards
to open the door, the two bolts will be withdrawn. The present invention is
a development of the one described in Letters Patent No. 14027 of 1898, and
consists essentially in combining a toggle-joint device with a modified form of
the mutually engaging projections from a sliding and a quadrant latch therein
described.
Referring to the annexed sheet of drawings which illustrate my invention,
Figure I represents an elevation of the lock and striking plate, with side
plate removed, the lock being shewn in the locked position.
Figure 2 is a similar view but shews the lateli and bolt in the striking
position..
Figure 3 shews the relative positions of the latch and bolt when the handle
has been turned so as to open the door.
Figures 4 and 4 are front and end elevations of the striking plate.
Figures 5 and 5* illustrate a modified form, of the striking plate in front
and, side elevation.
Above the main bolt A of the lock casing B, I arrange a sliding spring
bolt or catch C; the main bolt A being keyed upon the handle axis a in the
usual manner.
The underside of this sliding bolt or latch C is provided with
a dependent horn or projection e which enters and engages a recess D formed

page_text: in the upper and inner face of the main bolt, a¹. This projection e is recessed
out on both sides and the extremity is of larger size than its neck, being also
rounded off on the side towards the front of the lock.
It will be seen that the horn centers a correspondingly shaped recess in
the upper or inner portion of the main bolt A when the latter is in its higher
or unlocking position.
The main bolt A is actuated by a toggle-jointed lever E which in turn is
acted upon by means of a spring. Above the pivot a of the main bolt A and
upon its inner face is a recess into which enters a rounded knob or roller F
of one link or limb of the toggle-jointed lever E, the opposite end E' of which
lever is pivoted to the lock casing.
A suitable flat or other spring or springs G bears or bear against this other
limb or link E¹ of the lever in such a manner that the first mentioned link E
or a roller F on the same will be constantly applied against the main bolt A
and will tend to force the same into its horizontal or locked position.
When the main bolt is raised, the horn on the sliding bolt Centers the
recess D in the main bolt and these, as will be seen from the drawings, are so
constructed that the main bolt is therefore held in its raised position until
the bolt or latch C is pushed inwards; the main bolt being then released
returns to the horizontal position.
The sliding latch C is hollowed out and fitted with one or more internal
springs by means of which or by means of any other equivalent arrange-
ment, it normally projects from the lock casing. When the dependent horn
from the sliding latch engages its recess in the main bolt A and locks the
same, the front end of the latch and of the main bolt project through the lock
casing both these projections being suitably bevelled off.
The striking plate H has recesses formed to receive both bolts and is
fitted with bevelled surfaces, the lower, larger one being arranged somewhat
in advance of the upper one so that the main bolt A strikes its bevelled
surface before the sliding latch C makes contact with the upper bevelled
surface.
In the modification shewn in Figures 5 and 5, the bevelled surfaces I and I
are raised and the inner face of the lower one has an inclined depression k
which facilitates the engagement of the main bolt. This modification is
intended for use in cases where the locks are to be fitted to what are known as
"filleted" doors.
In operation, the actions of opening and closing the door will be as follows:-
To open, the handle is turned in the ordinary manner and the main bolt A
is raised towards its vertical position. As it rises the recess D) in the main bolt A
engages the horn e dependent from the sliding latch C, withdrawing this latter
into the lock casing and being then held thereby the sliding latch C and the
main bolt A have then both been withdrawn into the lock casing and, c.g., the
railway carriage door is free to be thrown or pulled open.
In closing the door, the nose of the main bolt will strike its bevelled contact
plate in advance of the sliding bolt, and thereby the main bolt will be driven
slightly inwards-being then released from engagement with the sliding bolt,
and then will be spring-impelled outwards and enter its recess in the striking
plate. The sliding bolt will in due course enter the upper recess.
On the annexed drawings I have shown a lock similar to that illustrated in
Fig. 3 of Patent No. 14027 of 1898 in which one horn depends from the sliding
bolt, but I may use the locks shown in Figures 1 and 2, of that specification
wherein two horns depend from opposite ends of the upper sliding latch.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
(1). In a lock having a revolving and a sliding bolt, the combination with

page_text: the mutually engaging projections from the said bolts, as described and claimed
in Letters Patent No. 14027 of 1898, of a toggle-jointed device, one limb of
which is fixed to the lock casing, being forced outwardly by means of a flat
spring or springs, and the opposite limb bearing either directly, preferably by
means of an enlarged end, or indirectly by means of a roller, into a recess
formed upon the inner face of the revolving bolt, substantially as herein
described and as illustrated upon the accompanying drawings.
(2). In combination with a lock as claimed in Claim 1, a striking plate pro-
vided with bevelled surfaces, where the lower is the larger and strikes the main
bolt in advance of the upper surface striking the sliding bolt, substantially as
herein described and as illustrated on Figures 3, 4 and 4 of the annexed
drawings.
(3). In combination with a lock as claimed in Claim 1, a striking plate
provided with raised bevelled surface the inner face of the lower one having an
inclined depression to facilitate the engagement of the main bolt, substantially
as herein described and as illustrated on Figures 5 and 5 of the annexed
drawings.
Dated this Sixth day of December 1899
GEDGE & FEENY,
Chartered Patent Agents, 60, Queen Victoria Street, London, E.C.