Improved Apparatus for Re-charging the Reservoirs of Tramcars Worked by Compressed Air.
Year: 1896

page_text: Date of Application, 18th Dec., 1896
1007
Accon ed
2nd Oct 1807
Date of Application, 18th Dec., 1896
Complete Specification Left, 7th Aug., 1807 Accoped, 2nd Oct 1807
PROVISIONAL SPECIFICATION.
Improved Apparatus for Re-charging the Reservoirs of Tramcars
Worked by Compressed Air.
I, VICTOR POPP, of 80, Rue Taitbout, Paris, France, Engineer, do hereby declare
the nature of this Invention to be as follows:-
My invention relates to means whereby the reservoirs of tramcars worked by
compressed air may be re-charged in a rapid and simple manner
The invention will be described with reference to the accompanying drawing
which shews a vertical sectional elevation of the apparatus which comprises a fixed
stand-pipe A and a part B placed on the vehicle. Between the stand-pipe A and
the compressed air main there is a stop valve G which is normally oven and above
it an air filter Z for arresting dust and above this again is a differential valve F which
is normally held closed by the pressure in the main. The stand-pipe E extends
upwards from the valve F and is terminated by the one member of a spigot and
socket coupling C. a is a bye-pass pipe connected with the space H beneath the
piston of the differential valve F.
The part B comprises a cock D and a flexible tube E' terminated by the other
member of the coupling C and containing a small flexible pipe al connected to
cock D and forming a continuation of the bye-pass pipe a with which it is con-
nected by a coupling. The cock D controls the admission to the reservoir on the
car, and, supposing the coupling to have been made as shewn, when the cock is
turned it opens the space H to the air through a a¹ and a whereupon valve F
opens to supply air to the reservoir. When the reservoir is charged and cock D
turned back, the air pressure is admitted to space H from pipe E' through channel d
and pipes a¹ a whereupon valve F closes. When cock D is quite closed it puts E¹
in communication through orifice with escape pipe 2 so as to release the pressure
in E E' and enable coupling C to be undone."
L: 10th day of December 1996
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
Improved Apparatus for Re-charging the Reservoirs of Tramcars
Worked by Compressed Air.
I, VICTOR POPP of 80, Rue Taitbout, Paris, France, 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: -
My invention relates to means whereby the reservoirs of tramcars worked by
compressed air may be recharged in a rapid and simple manner.
The invention will be described with reference to the drawing accompanying
my Provisional Specification which shews a vertical sectional elevation of the
apparatus which comprises a fixed stand-pipe A and a part B mounted on the
vehicle. Between the stand-pipe A and the compressed air-main there is a stop
ונם.

page_text: valve G which is normally open and above it an air filter % for arresting dust and
above this again is a differential valve F which is normally held closed by the ai
pressure from the main acting on the area-of the back of the valve in excess of the
area of the piston on the valve stem. The stand-pipe E extends upwards from the
valve F and is terminated by the one member of a spigot-and-socket coupling C
a is a pipe of small diameter connected with the space H beneath the piston of the
differential valve F.
The part B comprises a cock D controlling the admission of compressed air to
the reservoir on the car, a flexible tube El terminated by the other member of the
coupling C, and a small flexible pipe al connected to pipe a by a coupling similar
to that by which the flexible pipe a¹ is connected to the rigid part of the same
pipe leading into the shell of cock D. The cock 1) is provided with a circum-
ferential bye-pass passage d whereby al may be put in connection with a or with
the interior of E¹, according to the position of the cock D and with a thoroughfaret
and outlet p the purpose of which will be evident from the following explanation
of the operation. Supposing the parts EE and a a to have been coupled together
as shewn, the cock 1) is opened by being turned in the direction of the arrow where-
upon the space H beneath the valve piston is opened to the outer air through a a¹
bye-pass d, and outlet a², and compressed air remaining in the reservoir of the
vehicle (which is assumed to be still at a sufficient pressure to have propelied the
vehicle as far as the stand-pipe) at same time passes through pipes E E and by
pressing on the face of the valve F overcomes the unbalanced air pressure on the
back of the valve and the pressure of the spring in the space H beneath the valve
piston. The valve F being thus opened and the stop valve G being normally open,
compressed air is supplied from the main to the reservoir on the vehicle. When
the reservoir is fully charged, the cock D is turned back and by this motion the
full air pressure is admitted from pipe E' through channel d and pipes a¹ a to
space H so that the air pressure being balanced on both sides of the valve F and its
piston, the valve F is closed by the spring thus cutting off the supply of com-
pressed air from the main. When the cock D is quite closed, the relief orifice
puta pipe E in communication with the escape pipe 7 so as to release the pressure
in E E and enable coupling C to be disconnected. Thus the coupling together
of a a¹ being effected by the act of connecting the coupling C the re-charging
of the reservoirs may be effected by coupling together the stand-pipe B on the
vehicle to the stand-pipe A on the main, opening cock D, and, when the
recharging is completed, closing cock D and disconnecting the coupling C.
Having now particularly described and ascertained the nature of the said In-
vention and in what manner the same is to be performed I declare that what I
claim is :-
1. The apparatus for re-charging the compressed air reservoirs of tramway
vehicles, substantially as described and illustrated in the accompanying drawings.
2. The herein described means for connecting the compressed air reservoirs of
a tramway vehicle with a compressed air main for the purpose of re-charging the
reservoirs, the said means comprising a stand-pipe on the main controlled by a
differential valve, a stand-pipe on the vehicle adapted to be coupled to the main
stand-pipe and means substantially as described whereby the opening and closing
of the differential valve on the main stand-pipe is effected by the opening and
closing of a stop-cock on the vehicle stand-pipe through the agency of the air
pressure as described.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.