Improvements in Means for Locking or Fastening the Doors of Railway Carriages and the like.
Year: 1897

page_text: Date of Application, 10th July, 1897
PROVISIONAL SPECIFICATION.
Improvements in Means for Locking or Fastening the Doors of
Railway Carriages and the like.
THOMAS EDMUND EDLINGTON, 107, Lea Road, Gainsborough, Lincolnshire,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to make possible a means, so that the locking on
fastening of the doors of railway carriages, and the like, can be placed under the
control of the guard or engine driver attendant, and can be unlocked or unfastened
instantaneously at the will of either. The drawing shows a longitudinal section
of a lock for the aforesaid purpose. The lock is securely fastened in the frame
of the door by means of bolts marked f 1, f1, on drawing, and is
made to work by a vacuum. The action is as follows:-When a vacuum
is produced in the pipe or tube A, the pressure of the atmosphere which
is admitted through the holes f, f in the casing, immediately acts on the dia-
phragm E, and forces it forward in the chamber L; in the direction indicated by
the arrow, and by so doing the rod G which is connected to the diaphragm by
means of iron washers z, z, and nut z 1, actuates the lever H, which works on
fulcrum h2, and forces the bolt I in the direction indicated by the arrow into
socket K which is securely fastened by means of screws k, k, in the edge of the
door and thus the door is securely locked. J is a spring so that when the vacuum
has been destroyed, the door is unlocked by the spring forcing the bolt back into
its original position. In event if the spring should accidentally break at any time
I provide a pin marked h1, on drawing, which connects the lever H to bolt I,
and is made with a square head projecting a certain distance from the bolt, just
sufficiently so that a key can be fitted on, and the bolt I drawn back, thus unlock-
L is a
ing the door by hand after the vacuum has been destroyed in the pipe A.
chamber in which the diaphragm E performs its respective work as previously
described. D is a portion of casing part of the inside is made of a concave form
so as to form a portion of chamber L, and is also made with a projection on which
the cap B is screwed on, and together with rubber washer Ċ form an air-tight
connection with the pipe or tube A. F is also a portion of casing, part of the
inside is made of a concave form so as to form a portion of chamber L, and is
made to screw into portion D; but between these two parts is the diaphragm E,
which is made of a flexible substance preferably india rubber, and being so, it
forms an air-tight joint, this portion of casing is also made with a bracket attach-
ment f2, f2, for carrying the rod G, and bolt I, and for lever H to work in.
h is a pin connecting the lever H to rod G. h1, is a pin connecting lever H to
bolt I, but is made with a projecting head as previously described. h2 is the
fulcrum on which the lever H works.
T..1.. 1907

page_text: Improvements in Means for Locking or Fastening the 'Doors of
Railway Carriages and the like.
I, THOMAS EDMUND EDLINGTON, 107, Lea' Road, Gainsborough, Lincolnshire,
Agricultural Implement 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:
The object of this invention is to make possible a means so that the locking
or fastening of the doors of railway carriages and the like can be placed under the
control of the guard or engine driver attendant and can be unlocked or unfastened
instantaneously by either."
Referring to the drawings filed with my Provisional Application.
Figure 1 is a longitudinal section of a lock for the aforesaid purpose.
The lock is securely fastened in the frame of the door by means of bolts
marked f¹, f, on drawing and is made to work by a vacuum. The action is as
follows:-
When a vacuum is produced in the pipe or tube A the pressure of the atmos-
phere which is admitted through the holes f, f, in the casing immediately acts on
the diaphragm E and forces it forward in the chamber L in the direction indi-
cated by the arrow, and by so doing the rod G which is connected to the dia-
phragm by means of iron washers z, z, and nut z! actuates the lever H which works
on fulcrum h² and forces the bolt I in the direction indicated by the arrow into
socket K which is securely fastened by means of screws K, K, in the edge of the
door and thus the door is securely locked. J is a spring so that when the vacuum
has been destroyed the door is unlocked by the spring forcing the bolt back into
its original position. In event, if the spring should accidentally break at any
time, I provide a pin marked h¹ on drawing, which connects the lever H to bolt Ĭ,
and is made with a square head projecting a certain distance from the, bolt, just 2
sufficiently so that a key can be fitted on, and the bolt I drawn back, thus unlocking
the door by hand after the vacuum has been destroyed in the pipe A. L is a
chamber in which the diaphragm E performs its respective work as previously
described. D) is a portion of casing; part of the inside is made of a concave form,
so as to form a portion of chamber L and is also made with a projection on which a
the cap B is screwed on and together with rubber washer C forms an airtight
connection with the pipe or tube A. F is also a portion of casing; part of the
inside is made of a concave form so as to form a portion of chamber L and is made
to screw into portion D but between these two parts is the diaphragm, which is
made of a flexible substance, preferably indiarubber, and being so it forms an air
tight joint. This portion of casing is also made with a bracket attachment f for
carrying the rod G and bolt I and for lever H to work in. h is a pin connecting the
lever H to rod G. ¹ is a pin connecting lever H to bolt I but is made with a
projecting head as previously described. h is the fulcrum on which the lever H
works.
If desired I may so arrange the spring as to maintain the bolt in its locked
position, the diaphragm then being employed for releasing the bolt when required.
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. The combined construction and arrangement of the various parts substantially
as described and illustrated herein.
3
4
4

page_text: 2. In means for locking doors of railway carriages and such like: a flexible
diaphragm carried in a suitable chamber and attached to or operating a locking
bolt; said operation being performed by the exhaustion of air or production of
a sufficient vacuum upon one side of the flexible diaphragm aforesaid; a spring
5 for controlling the bolt and causing it to return to the required initial position
when the vacuum is decreased or destroyed.