An Improved Hydraulic or Fluid Pressure Accumulator.
Year: 1895

page_text: Date of Application, 25th Mar., 1895
Complete Specification Left, 25th Jan., 1896-Accepted, 29th Feb., 1896
PROVISIONAL SPECIFICATION.
An Improved Hydraulic or Fluid Pressure Accumulator.
We BENJAMIN HOOKER FREDERICK HOOKER and HENRY HOOKER all of
Pear Tree Court Farringdon Road London E.C. Engineers do hereby declare the
nature of this invention to be as follows
-
This our invention relates to an improved hydraulic or fluid pressure accumulator
and our invention consists in the construction and combination of parts hereinafter
described.
The apparatus consists of an outer casing which is preferably bell or domed shaped
in external appearance, closed at the bottom and provided with a pipe for the
admission of water or other fluid and a corresponding outlet.
Within the said outer casing is a similar internal casing having a small opening
at its lower end adapted to be closed by a ball valve which is confined within
suitable guides.
This inner chamber is permamently charged with air or gas at a pressure which
may be found desirable and which is prevented from escape by the ball before
mentioned.
Water is forced into the outer casing by means of a pump or other source and
when the pressure in the outer case exceeds the gaseous pressure in the inner the
latter is overcome and the fluid enters the inner chamber also the valve floating on the
surface of the admitted fluid. When the desired working pressure is obtained in
the apparatus the supply is cut off by a throw off device which stops the pump.
On lowering the pressure by the emission of fluid from the outer casing the pump
again starts and thus the pressure is again raised.
It will be seen however that while the whole of the pressure may be removed
from the outer casing there remains a constant pressure in the inner chamber thereby
effecting a great economy of time in again reaching the working pressure.
Dated this 22nd day of March 1895.
BENJAMIN HOOKER,
Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Hydraulic or Fluid Pressure Accumulator.
We BENJAMIN HOOKER FREDERICK HOOKER and HENRY HOOKER all of
Pear Tree Court Farringdon Road London E.C. 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 :-
This our invention relates to an improved hydraulic or fluid pressure accumulator
and our invention consists in the construction arrangement and combination of parts
hereinafter described.
The invention is devised with the object of providing an apparatus of compact
form and simple construction for the purpose of accumulating the pressure required
for working machines operated by the said agent.

page_text: In order that our invention may be more readily understood reference is made
to the accompanying drawing which is a cross section of an apparatus constructed
in accordance therewith.
The apparatus consists of an outer casing A which is preferably dome or bell
shaped in external appearance clused at the bottom end and provided with a
pipe b for the admission of the water or other fluid employed and c is a similar
outlet pipe.
Within the said outer casing A is an internal chamber B preferably of similar
shape and having a small opening dat its lower end or base adapted to be closed by
an internal valve e which is confined in a suitable guide.
The said inner chamber B is permamently charged with air or gas at any pressure
which may be desirable the said air or gas being prevented from escaping by the
valve before mentioned.
enters
Fluid is forced into the outer casing A by means of a pump or other source of
supply and when the fluid pressure in the outer chamber exceeds the gaseous
pressure in the inner the latter pressure is overcome and the fluid
the inner chamber also as shewn in the drawing the valve e which is buoyant
floating on the surface of the admitted fluid. When the desired working
pressure is obtained in the apparatus the supply is cut off from the pump to
the apparatus by an automatically operated cut off device or any other suitable
.means.
On lowering the pressure within the apparatus by the emission of fluid from the
outer casing fluid is again admitted to the outer casing as before and the required
working pressure is again obtained.
It will be seen however that while the whole of the pressure may be removed from
the outer casing there still remains a constant pressure in the inner chamber
thereby effecting a great economy of time in again obtaining the necessary pressure
at which the apparatus is intended to be worked. It will also be seen that there
are no heavily weighted plungers such as are commonly used in hydraulic
pressure accumulators the apparatus being portable and of extremely simple
⚫construction.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
An hydraulic or fluid pressure accumulator consisting of an outer casing,
an inner chamber charged with air or gas at a pressure having an opening in its
base or lower end a buoyant valve adapted to close said opening and pipes for the
admission and emission of the fluid to the outer casing the whole being constructed
arranged and operating substantially as described and illustrated.
Dated this 18th day of June 1895.
BENJAMIN HOOKER,
Agent for Applicants.