Railway Carriage and other Doors and Gates.
Year: 1888

page_text: Date of Application; 8th Mar., 1888
Complete Specification Left, 27th Nov., 1888
Complete Specification Accepted, 31st Dec., 1888
Railway Carriage and other Doors and Gates.
JOHN WILLIAM ROBERTS, Licentiate of Dental Surgery, Faculty of Physicians &
Surgeons Glasgo', Waddam House Hall Street Dudley, WALTER LEOPOLD SMITH,
Solicitor, High Street Dudley, (Worcestershire) do hereby declare the nature of this
invention to be as follows:-
'
A metallic cylinder or cylinders having two pistons and rods working right and
left by levers rods & cranks, to doors or gates specially applicable to doors of railway
carriages.
The cylinder is affixed to the roof inside the carriage running longitudinally.
between the doors & is four or may be more or less inches in diameter and, is fitted
with two air-tight metallic pistons-working from the centre of the cylinder to the
outlets. These pistons have rods working in collars at the outlets to guide them. The
rods are connected to the doors by a mechanical appliance consisting of connecting
rods lovers and cranks.
The cylinders are connected from compartment to compartiment by tubes running
across the roof from end to end of the carriage.
The carriages are connected one with the other by flexible tubes connected by
air-tight couplings.
The tubes are connected with a vacuum apparatus upon the engine under the
control of the person in charge-The working is effected by a vacuum being produced
in the apparatus upon the engine—producing a corresponding vacuum in each of the
cylinders of the closing apparatus-The atmospheric pressure acting upon the pistons
causes them to approach the vacuum-and acting upon the rods levers and cranks-
closes any open doors-and prevents them being opened unless by the will of the person
in charge of the vacuum apparatus upon the engine.
Objects. To prevent the improper opening of railway carriage doors whilst the train
is in motion.

page_text: To prevent the flying open of closed or partly closed or insecurely fastened doors.
To place the opening & closing of railway carriage doors under the control of the
person in charge of the vacuum apparatus upon the engine.
To close and secure any door or gate at the will of the person in charge of the
vacuum producing apparatus.
Dated this 6ith day of March 1900
TICATION.
Pneumatic Apparatus for the Closing, Securing, or Opening of
Railway Carriage and other Doors and Gates.
JOHN WILLIAM ROBERTS Waddam House Hall Street Dudley Dental Surgeon and
WALTER LEOPOLD SMITH of 182 High Street Dudley Solicitor 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 apparatus consists of a Metal Cylinder (a) having at one end a spiral spring (b)
The Cylinder is placed inside the Carriage over the window or in
suitable place. The Cylinder has an airtight piston (c) working with a rod through
some other
a gland to the end of the piston rod is a fixed collar and jaw p. Upon the rod is
placed a sliding collar (d) and attached thereto is a steel band (e) chain or other
flexible connection one end of which is attached to a quodrant (f).or guide clip fixed
upon the top or other part of the door.
A bolt (g) is fixed at the top of the door fitted with a spring (h) at one end-Upon
the door frame is fixed another bolt and spring (i) having a lever (k) at one end.
Outside the carriage or other convenient position is a tube (1) running from end
to end (of the Carriage) having at each compartment a small connecting tube (l. 1.)
fitted with an air releasing valve (m) and Tap (n) opposite to each cylinder and
connected thereto.
The tubes of each Carriage are coupled with a suitable flexible coupling (o) and
thence to the ejector or other pneumatic apparatus upon the Engine which may at
any time be used for the purposes of this closing and locking apparatus or for brake
or other purposes.
The action of the apparatus is as follows-By producing a
apparatus for that purpose or by condensed or compressed air, the Piston Rod (a. a)
vacuum with the
is drawn or forced downward, the fixed collar (p) or jaw upon the end of the Piston

page_text: Rod compressing the Spring (b) engages with the sliding collar (d) and this acting
upon the band (e) closes the door-As the jaw (p) upon the Piston Rod travels
home it engages with the lever (k) thrusting the bolt () in contact with the bolt (g)
upon the door shooting it (the bolt) into a staple (r) or other fastening upon the door
frame thus securing the door until such time that the vacuum or compressed air is
released.
Upon the release of the air the spiral spring "6" in the end of the Cylinder comes
into action and causes the piston to rise thus releasing the lever (k) and allowing
the bolts through the action of their respective springs to resume their original
positions and the door is free to be opened.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is
Novelty in closing holting and securing closed Railway Carriage Theatre and other
doors and gates.