Improvements in and connected with the Hydraúlic Transmission of Power.
Year: 1894

page_text: Date of Application, 18th Dec., 1894
Complete Specification Left, 2nd Sept.. 1895-Accepted, 19th Oct., 1895
Improvements in and connected with the Hydraúlic Transmission
of Power.
i = [
I, ALFRED TOWLER of Sun Foundry Leeds in the County of York Engineer
do hereby declare the nature of this invention to be as follows:-
My invention is for equalizing the flow of water through the pipes connected to
hydraulic machines so as to minimumize shocks.
It consists of two or more cylinders fitted with either pistons or rams connected
to each other either directly or through levers, the cylinders to be so proportioned
& so connected to the pipes that any variation of pressure caused by the stoppage,
and reversal of the hydraulic machine at the end of each stroke gives motion to
the rams or pistons of the equalizer & in so doing it causes a more regular flow
of water and so reduces the liability to shocks.
Dated this 17th day of December 1894.
Improvements in and connected with the Hydraulic Transmission
of Power.
I, ALFRED TOWLER (late of Sun Foundry Dewsbury Road Leeds) now of
No. 1 Cromer Road, Leeds, in the County of York, 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 is for equalizing the flow of water through the pipes connected to
bydraulic machines so as to minimumize shocks caused by the complete or partial
stoppage during the reversal of the stroke of the hydraulic machine such stoppage
causing a rise in the pressure in the supply pipe and a corresponding fall in the
pressure or pressures in the delivery pipe or pipes and in order to make the flow
continuous I connect the supply and delivery pipes with one or more cylinders
fitted with either pistons or rams connected to each other either directly or through
levers the pistons or rams being so proportioned that the pressures in the supply
and delivery pipes balance each other under normal working conditions so that
any variation from the normal causes a corresponding movement in the pistons
or rams of the equalizer in one or other direction until the normal condition is
restored.
In the case of bydraulic pumping engines to which my invention is especially
applicable the equalizer may be connected to the suction and delivery pipes of the
pump as well as the power and delivery pipes of the engine and when so connected
the flow through all the pipes will be more regular thereby reducing the friction,
liability to shock and so increasing the efficiency of the plant.
In order to make my invention clearly understood I hereto append three sheets
of explanatory drawings:
Fig. 1. shows a direct-acting hydraulic equalizer.
"

page_text: A and Biare cylinders fitted with pistons or rams P. P. The cylinders are
connected by stay rods H. H. on which slides a crosshead C. for connecting the
piston or ram rods K. K., J. J. are springs or buffers for the purpose of stopping
the moving parts without jar at either end of the stroke. The ends of the
cylinders A and B marked W. X. Y. Z. are connected to the hydraulic pumping
engine supply and delivery pipes and the pump suction and delivery pipes
respectively, the pistons or rams P. P. are so proportioned in area that they
balance each other under normal working conditions; inmediately the balance is
disturbed the pistons or rams are forced in one or other direction until equilibrium
is again established.
Fig. 2. shows a compensating-lever hydraulic equalizer.
A. and B. are cylinders connected with a hydraulic machine supply and delivery
pipes at X. Y. fitted with pistons or rams C. C. connected to a bell-crank-lever E.
by rods D. D.
The pistons or rams C. C. are so proportioned that the pressures in the supply
and delivery pipes balance cach other under normal working conditions: the
bell-crank or compensating lever E. is so constructed that the leverage of both
pistons or rams C. C. diminishes as they are pushed outwards from mid position
while the leverage of the opposite piston or ram increases: the object of this is to
keep the moving parts reciprocating near the mid position.
Fig. 3. shows a variable fulcrum lever hydraulic equalizer.
A and B are cylinders connected with a hydraulic machine supply and delivery
pipes at X. Y., fitted with pistons or rams C. C. connected to the lever E. by
rods D. D.; the pistons or rams C. C. are so proportioned that the pressures in
the supply and delivery pipes balance each other under ordinary normal working
conditions but to facilitate the requisite proportion the fulcrum P. is made
adjustable.
Either on the ends of the pistons or rams C. C. or in the cylinders A and B or
connected to the lever E springs or buffers are fixed as at T. T. to determine the
length of stroke without noise or jar.
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 1
claim is :
In the hydraulic transmission of power the employment of one or more cylinders
fitted with pistons or rams connected either directly or through levers for the
purpose of converting intermittent into continuous currents substantially and for
the purpose set forth.
Dated this 31st day of August 1895.