Improvements in Valves for Regulating the Admission of Fluids to the Working Cylinders of Presses, Hoists, or Lifts.
Year: 1892

page_text: Date of Application, 24th Sept., 1892
Complete Specification Left, 14th Apr., 1893-Accepted, 20th May, 1893
Improvements in Valves for Regulating the Admission of Fluids to
the Working Cylinders of Presses, Hoists, or Lifts.
1, JOHN CHARLES ETCHELLS, of Heaton Chapel, near Stockport, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention is designed primarily for the working of presses hoists or lifts
actuated by hydraulic power but may also be applied where steam or compressed
air are used.
It consists essentially in constructing the valve with two balanced circular or
cylindrical valves fitted in a casing having three chambers the valves being so
arranged that they are moved in the direction to open them by a spindle passing
through the centre and by 'a spring to close them and provided with a narrow
passage between the valves and the spindle the passage of the fluid through which
regulates the speed at which the valves are closed and the fluid above and below
them acts as a cushion or buffer to prevent jar or shock through closing too
rapidly.
In carrying out the invention the valve casing is constructed with three chambers
each chamber being provided with a passage to admit or pass out the actuating
fluid. In two of these chambers are fitted the two valves one an inlet and the
other an outlet valve.
The valves are cylindrical or circular and are connected together by or fitted
upon a single spindle being attached loosely thereto so that they are moved in one.
direction only by the spindle and moved in the opposite direction by a spring.
The spindle passes through the centre of the valves and is provided with two
collars one of which abuts against each valve the collar in one case being above
the valve and in the other case below it or otherwise arranged so that as the
spindle moves in one direction it moves one valve and when it moves in the other
direction it moves the other valve. The movement of the valves in the reverse
directions respectively is effected by a spring preferably placed between them.
The travel of the spindle is greater than that of the valves to allow of one valve
closing before the other begins to open. The inlet and outlet chambers in which
the inlet and outlet valves respectively work are also longer or deeper than the
valves. The valves have a circular seating to which when closed they are held by
the spring in addition to a cylindrical or piston packing.
The centre of the valves through which the spindle passes is sufficiently large to
allow of a certain amount of clearance with the spindle or to form a cavity the
passage of the fluid through which from one side of the valve to the other as it
closes regulates the speed at which they are closed by the spring. And the fluid
in the space above and below the valves respectively (when placed vertically) acts
as a cushion or buffer to prevent any shock or jar which would otherwise be caused
through the valves closing too rapidly.
Dated this 23rd day of September 1892.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Valves for Regulating the Admission of Fluids
to the Working Cylinders of Presses, Hoists, or Lifts.
I, JOHN CHARLES ETCHELLS, of Heaton Chapel, near Stockport in the
County of Lancaster, 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 invention is designed primarily for the working of presses, hoists or lifts
actuated by hydraulic power but may also be applied where steam or compressed
air are used, and relates to a double acting regulating or working valve for the
admission and exhaust of water, steam, compressed air or other fluid to the working
cylinders.
It consists essentially in constructing the admission valve with two balanced
circular or cylindrical valves fitted in a casing having three chambers the valves
being so arranged that they are moved in the direction to open them by a spindle
passing through the centre and by a spring to close them and provided with a
narrow passage between the valves and the spindle the passage of the fluid through
which regulates the speed at which the valves are closed and the fluid above and
below them acts as a cushion or buffer to prevent jar or shock through closing too
rapidly.
:
The invention will be fully described with reference to the accompanying
drawing in which a sectional elevation is shown.
The valve chest or casing A is constructed with three chambers B C and D each
chamber being provided with a passage to admit or pass out the actuating fluid the
passage b being the inlet, the passage d the outlet or exhaust, and the passage c
communicating with the cylinder for the purposes both of admission and exhaust.
In two of these chambers are fitted the valves the inlet valve E in the chamber B
and the outlet or exhaust valve F in the chamber D.
The valves E and F are cylindrical or circular and are fitted upon and connected
together by a single spindle G to which they are loosely attached with a spring H
fitted between them so that they are each moved in one direction only by the
spindle G and are moved in the opposite direction by the spring H, the spindle G
moving the valve E in one direction and the valve F in the reverse direction.
The spindle G passes through the centre of the valves and is provided with two
collars g glone of which abuts against each valve. The collar 9 is placed above
the valve E and the collar g' below the valve F or otherwise arranged so that as
the spindle G moves in one direction it moves one valve and when it moves in the
other direction it moves the other valve. The movement of the valves in the
reverse directions respectively is effected by the spring H preferably placed
between them.
The travel of the spindle is greater than that of the valves to allow of one valve
closing before the other begins to open. The inlet chamber B and outlet
chamber D in which the inlet valve E and the outlet valve F respectively work
are also longer or deeper than the valves. The valves have circular seatings e
and which when closed are held by the spring to the circular faces e' f¹ in addition
to a cylindrical or piston packing e"f".
The centre of the valves through which the spindle G passes is sufficiently large
to allow of a certain amount of clearance with the spindle or to form a cavity 9"
the passage of the fluid through which from one side of the valve to the other as it
closes regulates the speed at which they are closed by the spring. And the fluid
in the space above and below the valves respectively (when placed vertically) acts
as a cushion or buffer to prevent any shock or jar which would otherwise be caused
through the valves closing too rapidly.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. A regulating valve for hoists and the like constructed with two balanced
cylindrical valves fitted in a casing formed with three chambers each chamber
being provided with a passage to admit or pass out the fluids and the valves
arranged loosely on a spindle by which they are opened and a spring placed
between them by which they are closed arranged substantially as described and
shown.
2. In a valve for regulating the passage of fluids to and from the cylinders of
presses, hoists and the like the combination with a casing A constructed with three
chambers B C and D provided with inlet and outlet openings of two balanced
cylindrical valves E and F provided with double sets of faces connected together
by a spindle G which passes loosely through them by which they are actuated and
a spring H placed between them all constructed and arranged substantially as
described and shown.
3. A valve for regulating the passage of fluids to and from the cylinders of
presses, hoists or lifts having the several parts constructed and arranged in
combination substantially as and for the purposes described and shown.
Datad this 10th day of April 1893.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.