Improvements in Locks or Fastenings for Railway-carriage and other Doors.
Year: 1890

page_text: Date of Application, 23rd Dec., 1890
Complete Specification Left, 29th Aug., 1891-Accepted, 3rd Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Locks or Fastenings for Railway-carriage and
other Doors.
I WILLIAM HAMILTON BLAKENEY, of 33 Bath Street, Glasgow, in the
County of Lanark, North Britain, Mechanical and Electrical Engineer, do hereby
declare the nature of this invention to be as follows, that is to say :-
My said invention has for its object to improve and simplify the construction
of locks or fastenings for railway-carriage and other doors.
In a lock made according to my invention the handle spindle has fixed on it a
main latch or quadrant bolt, which is of an ordinary form, but has a notch in its
edge which is innermost when it is turned up. There is also in the lock at its
upper part a bevil-nosed slide or latch which can be pressed inwards against a
spring; and which is formed with a spur projecting downwards from it. A spring
is applied to the handle spindle in a manner to tend to turn it in the direction for
closing down the main latch, and when the handle is turned to open the door the
spring is strained. On the main latch being turned up the spur of the upper slide
or latch engages in the notch and retains the main latch; and on the door being
closed the upper slide or latch is pressed in by the action of its beviled nose on the
striking plate, and moves the spur out of the notch of the main latch which is
thereupon instantly closed by its spring.
The spring applied to the handle spindle is a metal helix arranged to act
torsionally. Its inner end is fixed to a small ring made with a square eye to fit
on a squared part of the spindle, and its outer end is fixed to a ring or annular
disk which when the parts are in position is fixed to the door. The handle spindle
may have an inside handle fixed upon it if desired.
Dated this Twenty-second day of December 1890.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Locks or Fastenings for Railway-carriage and
other Doors.
I, WILLIAM HAMILTON BLAKENEY of 33, Bath Street, Glasgow, in the
County of Lanark, North Britain, Mechanical and Electrical Engineer, 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, that is to say :-
My said invention has for its object to improve and simplify the construction of
locks or fastenings for railway-carriage and other doors.
In a lock made according to my invention the handle spindle has on it a main
latch or quadrant bolt; and there is also in the lock at its upper part a bevil-nosed
slide or latch, the parts being contrived so that the latter latch retains the main
latch in its open position but allows it to close by the action of a spring when on
closing the door the bevil-nosed latch is pressed in by encountering the striking
plate on the door frame.
A railway-carriage door lock made according to my invention is delineated on
an accompanying sheet of explanatory drawings.
Figure, 1, is a side elevation of the lock with the-cover removed and the main
latch in its open position.

page_text: Figure, 2, is a front end elevation of the lock with a part of the door in
section.
Figure, 3, is a plan of the bevil-nosed latch.
Figure, 4, is a view like Figure, 1, but with the latches in their closing or
fastening positions.
Figures 5 and 6, are a horizontal section and elevation of the striking
plate; and
Figure, 7, is a face view of a plate which holds an improved arrangement of
spring applied to the handle spindle.
In these drawings the same reference numerals are used to mark the same or like
parts wherever they are repeated.
In the lock shown in the drawings the handle spindle, 10, is made, as usual,
with a squared part which passes through a square hole in the main latch or
quadrant bolt, 11, which is of an ordinary form but has a notch or shoulder, 12, in
or on its edge which is innermost when the quadrant is turned up. In the upper
part of the lock there is fitted to slide horizontally a bevil-nosed latch, 13, which
can be pressed inwards against a spring or spring-pressed lever, 14; and which is
formed with a spur, 15, projecting down from it. A spring, 16, is applied to the
handle spindle, 10, in a manner to tend to turn it in the direction for closing down
the main latch, 11; and when the handle is turned to open the door the spring, 16,
is strained. On the main latch, 11, being turned up, the spur, 15, of the upper
latch, 13, engages in the notch or on the shoulder, 12, and retains the main latch
in the open position as shown in Figure, 1; and on the door being closed the upper
latch, 13, is pressed, in by the action of its bevilled nose on the striking plate, 17,
of the door frame, and moves the spur, 15, clear of the notch or shoulder, 12, of
the main latch, 11, which is thereupon instantly turned down or closed by its
spring, 16, the upper lateli, 13, being at the same time also pressed out by its
spring-pressed lever, 14, both latches engaging in sockets, 18, 19, formed for them.
in the striking plate, 17.
The spring, 16, applied to the handle spindle, 10, is a metal helix arranged to
act torsionally. Its inner end is fixed to a small ring, 20, made with a square eye
to fit on the squared part of the spindle, 10, and its outer end is fixed to a ring or
annular disk or plate, 21, which when the parts are in position is fixed to the inner
side of the door. This plate, 21, when being fixed by means of screws, is-by-means-
of a suitable key made with prongs which enter holes provided in the plate, hell
with a certain amount of initial strain on the spring to insure that it will turn the
latch, 10, quite down into its fastening position. The handle spindle, 10, may have
an inside handle, 22, fixed upon it if desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. In locks or fastenings for railway-carriage and other doors, combining a
quadrant latch or bolt with a sliding bevil-nosed latch the latches being made with
mutual engaging parts which cause the quadrant latch to be held in its open
position by the other latch, and to release-both-latches-on-the-bevil-nosed_latch.
being pressed inwards both latches entering sockets in the striking plate when the
door is closed, substantially as hereinbefore described..
2. The arrangement of helical spring applied torsionally to the handle spindle
with the improved mode of fixing the same substantially as hereinbefore described.
Dated this Twenty-eighth dor of Suorst 1901
EDMUND HUNT,
Applicant's Agent.