Improvements in Apparatus applicable for Simultaneously Looking or Unlocking Railway Carriage Doors and other Doors or Gates.
Year: 1894

page_text: · Date of Application, 17th Mar., 1894
Complete Specification Left, 12th Dec., 1894-Accepted. 19th Jan., 1895
Date of Application, 17th mar., 1034
Complete Specification Left, 12th Dec., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus applicable for Simultaneously Looking
or Unlocking Railway Carriage Doors and other Doors or Gates.
I, WALTER AUGUSTUS SHARP, of 6 Arkles Road, Liverpool, in the County of
Lancaster, Electrical Engineer, do hereby declare the nature of this invention to.
be as follows :-
This invention has for its object certain devices for simultaneously locking the
doors of a railway train or unlocking the same. It is also designed for locking
house doors and entrance gates in cases where it is desired to work the lock from a
given room in the house, instead of having to go to the door or gate every time a
person seeks admittance. For these purposes, the present invention is in every
way superior to the ordinary lock.
My invention, as applied to railway carriages, is operated by compressed air, or
by the pressure of the atmosphere produced by creating a vacuum. In carrying
the same into effect, the plan I prefer is to provide a small cylinder or chamber
furnished with a flexible diaphragm to which is firmly secured a locking bolt or
bar, preferably chamfered at the end, so that the door may close easily and lock
itself if desired. One of these devices may be placed in connection with each door
of the railway train, and they are preferably all connected together by means of a
pipe or tube, with the guard's van or other given point in the train, by which air
under pressure is supplied to each cylinder or a vacuum produced in the same.
The compressed air may be supplied from, or the vacuum formed by, the brake
apparatus of the train, or a separate compressed air storage chamber or air
compressing device may be supplied.
The mode of action is as follows :-
When compressed air is admitted into the cylinder or chamber, the diaphragm is
expanded by the pressure of the air, forcing the bolt bar downwards and locking
the door. Immediately the air is released, the bolt bar springs back, releasing all
the doors of the train simultaneously, a spring being employed if desired to
ensure the bolt springing back when the air is released. Communication with all
these cylinders is effected by a suitable cock in the guard's van or elsewhere, and,
when the compressed air is admitted through this, the bolt bars are forced out to
lock the doors. By closing this cock, the pressure is retained in each cylinder, or,
by turning it into another position, air is allowed to escape through an eduction
orifice, thus unlocking all the doors of the train. It is obvious that, if a vacuum.
be employed instead of compressed air, the vacuum formed in each cylinder will
cause the diaphragms to be drawn inwards, by a pressure equal to the excess of the
atmospheric pressure over that of the vacuum, and the diaphragms, through
suitable interposed mechanism, will move the bolt bars or rods to engage or release
the doors.
· The principle of my invention is applicable, subject to certain slight modifications
in detail, to the doors or gates of houses and other situations where it is desired to
fasten or unfasten the doors or gates from a distance.
DL
M 1904
:

page_text: Improvements in Apparatus applicable for Simultaneously Locking
or Unlocking Railway Carriage Doors and other Doors or Gates.
I, WALTER AUGUSTUS SHARP of 6 Arkles Road, Liverpool in the County of
Lancaster, 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 :-
This invention has for its object certain devices for simultaneously locking the
doors of a railway train or unlocking the same. It is also designed for locking
house or other doors and entrance gates in cases where it is desired to work the
lock from a given room in the house, instead of having to go to the door or gate
every time a person seeks admittance. For these purposes, the present invention
is in every way superior to the ordinary lock.
My invention as applied to railway carriages is operated by compressed air, or
by the pressure of the atmosphere produced by creating a vacuum.
In the accompanying drawings
Figure 1 is a side elevation of a railway carriage broken in half to economise.
space, with my apparatus applied thereto.
Figure 2 a cross section of the apparatus, and
Figure 3 a front view thereof.
In these figures, A is the roof of the carriage, B the top rail of the door, C a
small closed cylinder or chamber furnished with a flexible diaphragm D, E a locking
bolt or bar chamfered at one end so that the door may close easily at any time and
lock itself if desired, F a piston attached to the locking bolt E and working in the.
cylinder C, or if preferred the piston E may be attached direct to the diaphragm D.
One of these devices is placed in connection with each door of the carriages of a
train, and they are all connected together by means of a pipe or tube G with the
guard's van or other given point in the train, by which air under pressure is
supplied to each cylinder or vacuum produced in the same. The compressed air.
may be supplied from, or the vacuum formed by the brake apparatus of the train,
or a separate compressed air storage chamber or air compressing device may be
supplied.
"The mode of action is as follows:-
When compressed air is admitted into the cylinder or chamber C, the
diaphragm D is expanded by the pressure of the air, forcing, the piston F. and
bolt E downwards into the door B, thus locking the door. Immediately the-air
is released, the bolt bar E springs back, releasing all the doors of the train
simultaneously, a spring H being preferably employed to insure the bolt E
springing back when the air is released. Communication with all these cylinders is
effected by a suitable cock in the guard's van or elsewhere, and when the compressed
air is admitted through this, the bolt bars are forced out to lock the doors. By
closing this cock, the pressure is retained in each cylinder, or by turning it into
another position, air is allowed to escape through an eduction orifice, thus
unlocking all the doors of the train. It is obvious that it a vacuum, be employed
instead of compressed air, the vacuum formed in each cylinder will cause the
diaphragms to be drawn inwards, by a pressure equal to the excess of the
atmospheric pressure over that of the vacuum, and the diaphragms through, suitable
interposed mechanism will move the bolt bars or rods to engage or release.the
doors, or the pipes G may be led into the cylinders at the opposite end.
The principle of my invention is applicable, subject to certain slight
modifications in detail, to the doars or gates of houses and other situations where it
is desired to-fasten or unfasten the doors or gates from a distance.
..

page_text: 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. The improvements in locking or unlocking railway carriage doors or
other doors or gates, which consists in fixing in proximity to each door a
small cylinder or chamber provided with a flexible diaphragm or piston to which is
secured the locking bar or bolt, and in connecting the cylinder with an air
compressing or air suction device in such manner that whenever air is forced into
or released from the cylinder or a vacuum created therein, the bolt bars will be
forced into or drawn out of the bolt holes in the door,-as the case may be, and thus
lock or release all the doors simultaneously.
2. The arrangement for locking or unlocking doors or gates where it is desired
to work the lock from a given point instead of having to go to the door or gate
every time a person seeks admittance, which consists in the combination of a
cylinder or chamber fixed in proximity to the door or gate, a flexible diaphragm or
piston in said cylinder to which is secured the locking bolt or bar, an air
compressing or air suction device for forcing air into or creating a vacuum in the
cylinder, and one or more pipes or tubes for connecting said device with the
cylinder, substantially as described.
3. In apparatus for locking or unlocking doors or gates by the agency of
compressed air or by the pressure of the atmosphere produced by creating a
vacuum, the special arrangement whereby the induction and eduction orifices for
the air are controlled by one cock, substantially as set forth.
4. The combined arrangement and construction of parts forming my improved
apparatus for locking doors, substantially as described.
Dated this 11th day of December 1894
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.