An Improved Hydraulic Motor.
Year: 1892

page_text: Date of Application, 13th Oct., 1892
Complete Specification Left, 12th July, 1893-Accepted, 12th Aug., 1893
PROVISIONAL SPECIFICATION.
An Improved Hydraulic Motor.
I, HOWARD GEORGE BRAIN of The Rockery, New Street, Ross-on-Wye,
Herefordshire, Mechanical Engineer, do hereby declare the nature of this invention
to be as follows :-
:-
My invention relates to an improved hydraulic motor and has for its object the
utilisation and conversion into mechanical energy of the momentive inertia
consequent upon suddenly stopping a flow of water.
In carrying my invention into effect, I construct a suitable cylinder having an
annular chamber cast or otherwise formed at one end thereof; the said chamber
being of a diameter slightly smaller than that of the cylinder, and having a valve
chamber secured thereon. Within said cylinder is a piston with connecting rod,
one end of which is attached to a crank. A valve is adapted to the chamber above
mentioned, and is operated by means of a suitable lever worked by a cam or
equivalent device attached to the crank shaft. This lever is so arranged that when
the piston of the device reaches the end of its backward stroke and is just com-
mencing the forward movement, the water which has hitherto been free to escape
through the valve above referred to is now suddenly checked in its passage, and
acting on the piston, drives the latter forward to the end of its stroke, whereupon
the valve is again opened and the water allowed to escape while the momentum of
the fly wheel carries the piston back to the end of its stroke until it reaches the
position it first assumed, when the valve again closes, and the operation is repeated,
the valve closing by the water pressure, assisted if required by say a spring or
other auxiliary means according to the particular type of valve employed. The
piston is also furnished with a suitable leather valve or equivalent device for
keeping the piston watertight.
Dated this 10th den of Ontahan 1800
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, W.C., Agent for Applicant.
COMPLETE SPECIFICATION.
An Improved Hydraulic Motor.
I, HOWARD GEORGE BRAIN, of The Rockery, New Street, Ross-on-Wye,
Herefordshire, Mechanical 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 an improved hydraulic motor and has for its object the
utilization and conversion into mechanical energy of the momentive inertia
consequent upon suddenly stopping a flow of water.
In carrying my invention into effect, I construct a suitable cylinder having an
annular chamber cast or otherwise formed at one end thereof, the said chamber
being of a diameter slightly smaller than that of the cylinder, and having a valve
chamber secured thereon. Within said cylinder is a piston with connecting rod,
one end of which is attached to a crank. A valve is adapted to the chamber above
mentioned, and is operated by means of a suitable lever worked by a cam or
equivalent device attached to the crank shaft. This lever is so arranged that when
the piston of the device reaches the end of its backward stroke and is just com-
mencing the forward movement, the water which has hitherto been free to escape

page_text: through the valve above referred to is now suddenly checked in its passage, and
acting on the piston, drives the latter forward to the end of its stroke, whereupon
the valve is again opened and the water allowed to escape while the momentum of
the fly wheel carries the piston back to the end of the stroke until it reaches the
position it first assumed, when the valve again closes, and the operation is repeated,
the valve closing by the water pressure, assisted if required by say a spring or
other auxillary means according to the particular type of valve employed. The
piston is also furnished with a suitable leather valve or equivalent device for keeping
the piston watertight.
And in order that this my invention may be fully understood I have annexed
hereto a sheet of drawings illustrative of the same in which
Fig. 1. represents a vertical section of motor and "
ram attachment.
"
པP
E. is a connecting rod.
F is a crank shaft.
G. is a grooved cam (shewn in section in Figure 3) secured to flywheel. H. is a
lever having its fulcrum at J and fitted with a roller K which works in groove of
cam G.
L is a rod for connecting levers H. and N.
M. is a flywheel secured on crank-shaft F.
N is a lever secured on stem of valve P.
P is a rotating gun metal valve with a number of radial slots which allow water
to escape when they are brought opposite similar slots in seating R.
S. is a valve chamber fitted with cover and usually attached to main casting A,
with bolts as shewn when the crank is on the line X the valve P. is closed and the
water acts on the piston.
In combination with the above described hydraulic motor, I may employ a
hydraulic ram attachment as hereafter described.
T being a casting secured on top of valve chamber S. or it may be fixed on top
of inlet pipe if required instead of on valve chamber.
V is a back pressure valve.
W. is a screw for regulating valve V.
Y is an air chamber.
Z. is the delivery pipe connection.
When the
The action of the hydraulic ram attachment for motor is as follows.
valve P is suddenly closed the momentum of the water forces out the piston C,
causing the crank shaft to revolve, but a portion of the power may be utilized to
force water through the valve V compressing the air in chamber Y. As the water
cannot return through the valve V the air in chamber Y expands and forces it
through pipes which may be connected to Z to a much greater altitude than the
source of supply to motor. Water is forced through the valve V each time the
valve P is closed. If the "ram" is not required to work, the screw W. is run
down on top of stem of valve V forcing it to its seat and thereby throwing the
whole power of water on the piston C.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
First. In hydraulic motors utilising the momentive force of the water to expel
the piston and yield power through a crank shaft substantially as hereinbefore
described and shewn in the drawings.

page_text: Second. An improved hydraulic motor consisting essentially of the combination
and arrangement of parts hereinbefore described and shewn.
Dated this 11th day of July 1893.
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,
Agent for Applicant.