IMPROVEMENTS IN HYDRAULIC ENGINES
Year: 1885

page_text: I WILLIAM SPEIGHT of Rose Bank Road, Leeds, in the County of York, Engineer
do hereby declare the nature of said invention for "IMPROVEMENTS IN HYDRAULIC
ENGINES" to be as follows:-'
H.
1
According to my invention I operate the slide valves, by dispensing with the
use of the ordinary valve spindle and instead I employ a rocking, shaft which
through the medium of a lever transmits motion to the supplementary slide valve,
Buch slide valve being employed for intermittently supplying a pressure of water
to the supplementary cylinder for moving the piston which actuates the slide in
main cylinder. Both slide valves are supplied with pressure from the same feed,
therefore they have always an equal pressure of water.. I provide the pistons in
each cylinder with solid discs of metal these being turned so as to fit the cylinders,
and round each face of the piston-discs, hydraulic leathers are fastened and in close
contact with the faces of the cylinders.
By this arrangement the discs support and strengthen the leathers and thereby
retain them in position in contact with the cylinders and water tight...
By this arrangement also, the leathers wear much longer, consumption of water.
is much reduced, and owing to the support given to the leathers there is much less
friction thereon.

page_text: I, WILLIAM SPEIGHT of Rosebank Road Leeds in the County of York, Engineer,
do hereby declare the nature of the said invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the following
statement:-
Fig. 1 is a side elevation. Fig. 2 an end elevation. Fig. 3 a plan looking at the
top. Fig. 4 a longitudinal section and Fig. 5 a transverse section.
According to my invention operate the slide valve a of the cylinder bas
follows, dispensing with the use of the ordinary valve spindle.
I employ a rocking shaft c which through the medium of a lever & transmits
motion to a supplementary slide valve such slide valve being employed for
intermittently supplying a pressure of water to a supplementary cylinder f for
moving the pistons 9 which actuate the slide valve a of the main cylinder b.
Motion is transmitted to the slide valve a from the pistons g by means of a
projecting piece g¹ on their piston rod g².
Both slide valves a and e are supplied with water from the same feed h,
therefore they have always an equal pressure of water.
The pistons in each cylinder, respectively g and i are formed of solid discs, these
may be either of metal or hard wood, such as lignumvita and are so turned as to
fit the cylinder.
On the faces of each piston or disc, hydraulic leathers respectively ; and k are
fastened, and in close contact with the face of the cylinders.
By this arrangement the discs. or pistons g and i support and strengthen the
leathers and k and retain them in contact with the cylinders.
The required rotary reciprocating movement is imparted to the rocking shaft c
which operates the supplementary valve e through the lever d² which is inter-
mittently moved by the adjustable tappets 7 on the sliding rod.m, such slide rod m
being actuated from the piston rod m³ and attached thereto by the bracket n.
The passages for the admission and exhaustion of water to and from the main
cylinder bare shewn at o and p. The passages for the admission and exhaustion
of water to and from the supplementary cylinder fare shewn at
and r.
I by preference make the supplementary valve e and slide valve a of lignumvitæ
as I find in practice there is less friction than when metal is used, and the engine
works much steadier and is silent in its movement.
Other parts of the engine not described may be of ordinary construction.
The above described engine is particularly applicable for actuating the blowing
apparatus of organs and other musical instruments of a kindred nature and may
be also used for other purposes where a motor with a steady and silent movement
is required.

page_text: Having now particularly described the nature of my said invention and in
what manner the same is to be performed, I declare that what I claim is :-
The arrangement, construction and application of supplementary slide valve e for
admitting the water pressure, operated substantially as herein set forth.
The arrangement, construction and application of supplementary pistons 9 in
supplementary cylinder f for operating the slide valve a of the main piston i in
cylinder b, substantially as herein set forth.
The general construction of pistons in the main cylinder and supplementary
cylinder f, substantially as herein set forth.
The combination of the various parts forming the hydraulic engine, all arranged
and operating, substantially as herein set forth and shewn in the accompanying
drawings.
J. W. HARDING,
For the Applicant.