Operating Pistons and Rams by Air Pressure, and Means for Controlling the same.
Year: 1890

page_text: Date of Application, 4th June, 1890.
Complete Specification Left, 4th Mar., 1891-Accepted, 11th Apr., 1801
PROVISIONAL SPECIFICATION.
Operating Pistons and Rams by Air Pressure, and Means for
Controlling the same.
We, DAN RYLANDS, of Hope Glass Works, Stairfoot, near Barnsley, in the
County of York, Glass-bottle Manufacturer, and CHARLES EMMET, Mechanical
Engineer, of 194, Doncaster Road, Barnsley, in the County of York, do hereby
declare the nature of this invention to be as follows
Where it is
This invention consists in operating pistons and rams by air pressure and through
the intervention of water or other fluid, avoiding the percussive action due to
air under pressure alone, and is carried out in the following manner. A. closed fluid
resevoir fitted with a suitable air inlet and outlet valve is by pipe connection in
communication with a cylinder containing a ram. In the pipe connection between
the cylinder and resevoir is placed a suitable valve to regulate and control the flow
of the liquid employed. Air under pressure being admitted on the upper surface of
the fluid contained in the resevoir will displace and force the fluid past the regulating
valve and will lift the ram and its load. On the air being by air valve released
from the resevoir, the ram will by gravity descend and in its descent will displace
the fluid contained in the ram cylinder and return it to the resevoir.
desirable to exert power both during the indoor and outdoor stroke we employ a
piston fitted with rod which rod works through a stuffing box in the usual manner.
Air under constant pressure is admitted and maintained on the annular area of
piston. The larger area of piston is in communication with a liquid resevoir similar
to the one previously described and like it fitted with an air inlet and outlet valve
and a fluid regulating valve. On the air inlet valve being operated it will admit.
compressed air to the upper interior of fluid resevoir, displacing the fluid and
forcing it through the pipe connections past regulating valve into that end of the
working cylinders in which the larger area of piston works. The stroke being
completed the air is by valve released from the fluid resevoir when the constant air
pressure maintained on the smaller area of piston will cause the piston to return to
its first position and in so doing will cause the fluid to return to the fluid resevoir.
In some cases the constant pressure exerted on the annular area may be fluid
pressure and the intermittent pressure on the larger area may be air pressure.
Where it is desirable that the indoor stroke should be effected in shorter time than
the outdoor or vice versa, we place in the pipe connection between fluid resevoir and
the end of working cylinder it is desired to serve, a valve so constructed that it will
allow only a small passage of fluid during the working stroke but will open to its
full area on the return stroke.
DE 1 2 1 1900
DAN RYLANDS.
CHARLES EMMET.
COMPLETE SPECIFICATION.
Operating Pistons and Rams by Air Pressure, and Means for
Controlling the same.
We, DAN RYLANDS, of Hope Glass Works, Stairfoot, near Barnsley, in the
County of York, Glass-bottle Manufacturer, and CHARLES EMMET, Mechanical
Engineer, of 194, Doncaster Road, Barnsley, in the County of York, 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 consists in operating pistons and rams by air pressure, and through

page_text: the intervention of water or other fluid avoiding the percussive action due to air
under pressure alone. Refering to the drawings, Fig. 1 is a sectional view of an
air and water vessel or resevoir opérating a piston and a ram. Fig. 2 is also a
sectional elevation of a cylinder, piston, and controlling valve. In Fig. 1a is a
resevoir containing water or other fluid, a slide valve actuated by lever c, d the
inlet port from valve box e to interior of resevoir controlled by slide valve b, f the
air inlet port to valve box e, g a ram working in a cylinder h, and i a pipe connecting
the lower portions of ram cylinder and. fluid resevoir; jis.a piston working in the
cylinder having pipe connection at 7 with fluid resevoir, m the piston rod, n an
inlet port communicating between the upper portion of cylinder k, and the air
pressure supply pipe o.
In Fig. 2 is the piston, m the piston rod, the cylinder having at its lower end a
pipe communicating with the lower portion of fluid resevoir as shown at p, q the air
inlet port, and a speed regulating valve provided with a port or passages of
suitable area, and the valve seating.
The method of operating the above described apparatus is as follows:-The
resevoir a being charged with fluid, and compressed air being admitted to the upper
surface of fluid by valve will result in the compressed air displacing the fluid in
the resevoir a, causing it to enter the ram cylinder, giving motion to the ram and
causing it to make the outdoor stroke. If it be desired that a portion of the stroke
only should be made the slide valve is moved so that the bridge is brought over
the inlet port & leading to resevoir a,. when the compressed air contained therein
will become imprisoned further movement of the ram will cease, and the ram with
its load sustained in the desired position. The slide valve being now put in the
position shown by Fig. 1 will result in the ram by gravity displacing the fluid in
the ram cylinder and returning it to the fluid resevoir. If it be desired to make a
portion only of the indoor stroke, the valve & being placed in the position previously
described will prevent the escape of compressed air and the rain will be brought
to rest.
Fig. 1 also shows the manner of actuating a piston and rod, the indoor stroke in
this case being made by the constant air pressure exercised on the upper and
smaller area of piston assisted by the weight of piston, piston rod, and load."
Or the constant pressure may be water pressure and the intermittent pressure
may be air pressure as shown in the arrangement illustrated by Fig. 2, where u is
the port supplying constant water pressure, and a speed controlling valve having
formed within it an air admittance ports for the supply of the intermittent air
pressure. It will be seen that the area of the ports will determine the speed of the
outdoor stroke and the area of the valve the speed of the indoor stroke.
controlling valve can also be applied to govern the speed of the piston and ram
illustrated by Fig. 1 and may be in connection with either the constant or inter-
mittent pressures.
The
The illustrations and above description show the application of rams and pistons
to lifting purposes only, but it will be evident that they are adaptable for any
purpose requiring rectilinear motion.
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—
1. Operating pistons and rams by air pressure, and through the intervention of
water obviating the percussive action due to air under pressure alone.
2. The controlling valve and port s and their application in controlling the
speed of the ram or piston during the indoor or outdoor stroke:
1
1
C
T
DAN RYLANDS.
CHARLES EMMET.