Improvements in the Valve Mechanism of Engines for Raising or Forcing Liquids and for other Purposes where Compressed Air or Gas is Required.
Year: 1899

page_text: Date of Application, 13th May, 1899
Complete Specification Left, 13th Feb., 1900-Accepted, 31st Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in the Valve Mechanism of Engines for Raising or
Forcing Liquids and for other Purposes where Compressed Air
or Gas is Required.
I, ARCHIBALD BRUCE, of 67, Cathedral Street, Glasgow, Plumber, do hereby
declare the nature of this invention to be as follows:
This invention relates to the valve mechanism of engines for raising or fore-
ing liquids and for other purposes where compressed air or gas is required.
The present invention is an improvement upon and development of the piston
valve and plug cock mechanism described in the Specifications of my prior
Patents Nos. 29782 of 1896 and 29808 of 1896.
In the present invention the compound piston valve and plug cock is mounted
upon a base plate or its equivalent which can be secured to the bottom of the
air compressing tank or cylinder in any suitable manner.
made with a spindle which passes right through the end covers of the valve casing
The piston valve is
and works through stuffing boxes provided on said covers.
spindle is provided with a rubber or leather faced disc (or equivalent) which is
One end of the
capable of bearino tightly against a coned screwed nipple on the water inlet
branch whilst the other end of the spindle is provided with a rubber or leather
faced disc (or equivalent) which is capable of closing tightly against the water
outlet branch.
As the piston valve reciprocates back and forward in the valve casing the
spindle with its discs also moves and alternately opens and closes the water inlet
and outlet branches.
The inlet branch may be made in the form of a tee-piece screwed at its end for
the reception of the coned nipple whilst the outlet branch may be made in the
form of a curved or bent pipe secured in a ring made in the base plate.
A number of interchangeable nipples may be used having orifices of varying
izes. By having inter-changeable nipples one with a proper orifice to suit the
vater pressure can be fitted in place at any time.
If desired instead of the spindle passing right through the piston valve spindle
xtensions or equivalent may be made at each end of the valve.
Dated this 12th day of May 1899.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.
COMPLETE SPECIFICATION.
Improvements in the Valve Mechanism of Engines for Raising or
Forcing Liquids and for other Purposes where Compressed Air
or Gas is Required.
I, ARCHIBALD BRUCE, of 67, Cathedral Street, Glasgow, Plumber, do hereby
declare the nature of this invention and in what manner the same is to be per-
[Price 871

page_text: formed, to be particularly described and ascertained in and by the following
statement:
This invention relates to the valve mechanism of engines for raising or fore-
ing liquids and for other purposes where compressed air or gas is required.
The present invention is an improvement upon and development of the piston
valve and plug cock mechanism described in the Specification of my prior
Patents Nos. 29782 of 1896 and 29808 of 1896.
In order that my said invention may be properly understood I have hereunto
appended an explanatory sheet of drawings, whereon,
Fig. 1 is a plan view of the engine with the cover A¹ removed so as to show
the interior.
Fig. 2 is a vertical section of the engine.
Fig. 3 is a horizontal section of the valve mechanism taken on the line Y-Y
Fig. 2.
Fig. 4 is a vertical section of the valve mechanism taken on the line X-I
Fig. 1.
Fig. 5 is a vertical cross section (on the line Z-Z Fig. 3) of the piston valve
casing.
On the drawings the same reference letters wherever repeated indicate the
same parts.
A is the water tank of the engine and A¹ the cover and A2 the bottom of the
tank. B represents the water in the tank. C is a ball float connected with the
tube D which latter works telescopically on the upright E. Fis the piston
valve which is of a somewhat similar construction to the piston valve described
in my prior Specification No. 29782 of 1896. G is the plug cock combined with
the piston valve. H is the lever for working the plug cock, and, as shown, the
end of this lever passes through a strap D' on the tube D so that, as the latter
rises and falls with the float, the lever is moved up and down. H2 is an arm
connected with the spindle of the plug-cock and carrying a weight H₁ which
counter balances the weight of the lever H and tube D. I is the water inlet
connection and J the water outlet pipe or exhaust.
As will be seen I have shown in the drawing the piston valve F as having
a cup-leather piston F¹ whose piston rod F2 passes through stuffing boxes in
both of the cylinder covers. K is the water pipe through which water under
pressure passes to the passage L in the valve casing and thence to the cock G
to be distributed by the latter, as it is turned by the action of the lever H, to
one or other of the ports M, N, leading to the ends of the casing. O is the
exhaust passage made in the base plate P and leading from the plug cock barrel
to the outlet J.
As the plug cock G is turned it either delivers live water from the passage L
to the port M and one end of the cylinder and, at the same time, exhausts
water from the other end of the cylinder by the port N to the outlet O, J, or
it delivers live water from the passage L to the port N and exhausts water by
the port M to the outlet J. So far the action is the same as the action of the
compound valve described in the specification of my prior Patent 29782 of 1896.
The admission of live water to the ends of the cylinder in the manner herein-
before described causes the piston F¹ to reciprocate as will be readily under-
stood the action being the same as that of an ordinary steam piston.
Under my present invention the piston rod or spindle F2 which works through
the stuffing boxes on the valve covers is provided, at one end, with a rubber or
leather faced disc a (or equivalent) which is capable of bearing tightly against
a coned screwed nipple b on the water inlet branch c, and, at the other end, with
a rubber or leather faced disc d (or equivalent) which is capable of closing
tightly against the mouth of the water outlet branch J¹. As will be seen the
ends of the rod F are screwed for the reception of the discs.
As the piston valve reciprocates back and forward the spindle with its dises
also moves and alternately opens and closes the water inlet and outlet branches.

page_text: The inlet branch c may be made in the form of a hollow tee-piece screwed at
one end for the reception of the coned nipple 6 whilst the outlet branch J may
be made in the form of a curved or bent pipe secured in an opening made in the
base plate and bottom of the tank. As will be seen the vertical branch of the
5 tee-piece is made solid and screwed externally. It is adapted to be passed
through holes in the base plate and bottom of the tank and to be secured by
a nut f:
A number of interchangeable nipples may be used having orifices of varying
sizes. By having interchangeable nipples one with a proper orifice to suit the
water pressure can be fitted in place at any time.
The tee piece c can be connected by a pipe direct with the source of water
supply but in large towns where the water is supplied at high pressure in the
mains I prefer to couple the tee piece c by means of the connections g, g¹ to a
pressure reducing valve h which may be of any ordinary and suitable construc-
tion. This valve is connected by the branch I with the water main.
On the drawings I have shown a spring and diaphragm type of reducing
valve h.
The action of this apparatus is similar to the apparatus described in my prior
Specification No. 29782 of 1896 the rising and falling of the float C with the
alternate inlet of water to and discharge of water from the tank A causing the
lever H to turn the plug cock and thereby supply live water from the pipe K
to each end of the cylinder F alternately.
to the cylinder ends causes the piston Fi to reciprocate and thereby actuate the
This alternate supply of live water
piston rod F2 so that, at one reciprocation, water is allowed to enter the tank,
through the inlet b, whilst the exhaust of water from the tank, through J¹, is
prevented, and, at the next reciprocation, the inflow of the water through bis
stopped whilst the water in the tank is allowed to exhaust itself through the
outlet J. This alternate inflow and outflow of water to and from the tank is
utilized, in the ordinary manner, to force air through the air valve Q.
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 consider novel and desire to claim is:-
-
1. Valve mechanism of hydraulic engines characterized by a reciprocating
iston valve whose piston rod has discs at each end so arranged relatively with
suitable water inlet and outlet that, at one reciprocation of the piston-valve,
he inlet is closed whilst the outlet is opened, and, at the next reciprocation, the
utlet is closed and the inlet opened, substantially as hereinbefore described.
2. The construction and arrangement of the water inlet and outlet and the
iston valve with its dise valves (a, d) for opening and closing said inlet and
utlet, substantially as hereinbefore described with reference to the drawings
nexed.
Dated this 12th day of February 1000.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow. Acent