Improvements in Locks or Fastenings for Railway Carriage or other Doors.
Year: 1896

page_text: Date of Application, 1st July, 1396
Complete Specification Left, 25th Feb., 1897--Accepted, 15th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Locks or Fastenings for Railway Carriage or
other Doors.
I HENRY MCKAY Engineer 11 George Street Aberystwyth in the County of
Cardigan do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in "locks" or "fastenings" for railway
carriage or other doors and has for its object a more certain action combined with
simplicity and greater security when fastened, it absolutely locks the door when the
handle is turned.
My invention consists in a handle having a central stem or bolt which slides through
metal bosses fastened on the outside and inside of the door and recessed a little
distance in the door. Fitted in this boss is a spiral spring placed round the stem or
bolt one end acting on a boss of the outside handle (which latter is firmly secured to,
or may be part of the bolt) the other acting on a collar formed at the other end of
a recess of the boss. The catch for fastening the door is fitted on a square formed on
the stem or bolt and works in a plate on the side of the door, the plate having an
opening of two various widths and so arranged that when the handle is shut the spiral
spring mentioned above forces the catch into the opening or slot in such a manner as
to securely lock the door, it being then impossible to open the door as the handle
cannot possibly be turned by accident or vibration.
To open the door from the outside it is necessary to press the handle thus
compressing the spring and at the same time moving the catch from the opening or
slot where it was locked, into the opening which permits it to be turned back.
The bolt or stem may be prolonged through the door and have a handle on the
inside, when the action of opening will be reversed, the handle being pulled before
it can be opened.
The apparatus may be applied with handles to open the door from the inside or
from the outside, or both, and the action of pulling or pushing may be reversed if
more convenient and devices other than a spiral spring may be used for accomplishing
the same object.
COMPLETE SPECIFICATION.
Improvements in Locks or Fastenings for Railway Carriage or
other Doors.
I, HENRY MCKAY, Engineer of the New Inn, Great Darkgate Street, late of
11 George Street Aberystwyth, in the County of Cardigan 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 improvements in locks or fastenings for railway carriage

page_text: t
and other doors. In carrying out the said improvements, the central stem or shaft is
held in position by two bosses or bearings, one on each side of the door and allowed to
turn and slide freely between the bosses or bearings.
The stem or shaft has a catch securely fitted on, and a spiral or coiled spring is placed
around the said shaft inside a recess left in the outer bearing; the object of the spring
being to press the stem or shaft outwards. The catch which is secured to the stem or
shaft, works in a plate on the edge of the door and also in a similar plate set into the
door frame. These plates have openings of different widths and are so arranged
that when the handle or handles are turned into the locking position, the spiral spring
forces the catch into the larger opening or slot in the door frame in such a manner
as to securely lock the door. The handle then cannot possibly be turned by
accident or vibration, so that it is impossible for a carriage door to open of its own
accord.
To unlock the door from the outside the handle must be pressed in, in order to
release the catch, and then turned, and to open the door from the inside it must be
pulled & then turned.
Referring to the accompanying sheet of drawings.
Fig. I is a plan, and Fig. Il a front elevation, Fig. III is a side elevation,
shewing catch in position when the door is locked,
Fig. IV is a side elevation shewing catch in position when the door is unlocked,
Fig. V is a side elevation shewing the plate on door frame.
A is the central stem or shaft, B is the catch securely fitted on to the stem or
shaft A. C is the spiral spring coiled around the shaft A, for pressing the shaft
outwards and the catch into the larger opening or slot in the plate D in the door
and into a similar slot in the plate D in the door frame.
E are the bosses or bearings secured to the door through which the shaft A turns
and slides. F are the handles attached to the shaft A for locking and unlocking
the door.
In constructing a lock to contain my said improvements I would have it understood
that it is not essential that all the details should be made exactly as above described.
The spiral spring C and the slot or opening in the plates D & D₁ may be reversed
in position so that in opening the door from the outside the handle may be pulled
instead of pressed in unlocking the door, as may be found most convenient.
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. A coiled spring C for operating or sliding the shaft A and catch B.
2. A plate D in the door frame with openings of different widths to receive
the catch B when the door is locked as specified and shewn in Figs. 1, 3, 4 & 5.
3. The combination of the shaft A, the coiled spring C and the slot or opening in
the plates D & D¹.
4. The combination of the parts forming the lock herein described and illustrated
by the Figures 1, 3, 4 & 5.