Improvements in Steam Vacuum Pumps.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Vacuum Pumps.
I, GEORGE HENRY FISH, Engineer of 23 Oldham Road Miles Platting,
Manchester, do hereby declare the nature of this invention to be as follows:-.
My improvements relate more particularly to the pulsating form of pump, in
which the steam acts directly upon the liquid to be pumped, and.. by condensation.
forms a vacuum for recharging the pump..
I make the steam chest,larger than usual, and with the two valve seats opposite.
to, and parallel, with one another. The valve, is made preferably with a disc. at:
each, end to form the valve face, and with a hole through the centre of the valve
faces, and at right angles thereto. This hole is arranged to admit a bar fixed..
between the seats, and upon which the valve slides from seat to, seat when affected
by the vacuum in one or other of the chambers of the pump. The said hole may
be parallel with the seats so as to slide across a bar carried from the cover or covers,
which are preferably placed one on each side of the valve chamber. The bar may
be of any, suitable; form and, be. fitted, with wheels, rollers.or. balls.,to, increase the
sensitiveness of the valve. I prefer to use rubber water valves of the disc, type,
which move up and down on a central spindle, and against a suitable guard. But
to make more certain of their closing, and..remaining, closed, I put a weight.on
the back of the said valves, preferably in the form of a heavy metal disc the full
diameter of the valve. This weight may be in one with the casings sometimes used
to give greater rigidity to the valve.
Dated this 22nd day of June 1896.
G. T. HARRAP,
Agent for Applicant.
Steam
mps.
GEORGE HENRY FISH, Engineer of 23 Oldham Road, Miles Platting,
Manchester, 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 improvements relate more particularly to the pulsating form of pump, in
which the steam acts directly upon the liquid to be pumped, and by condensation
forms a vacuum for recharging the pump.
In order that my invention may be more readily understood I have caused
to be attached hereto, one sheet of drawings in which similar letters refer to
similar parts.
Fig. 1 is a vertical section through the upper part of the pump and admission
valve E.
Fig. 2 is a horizontal section through the valve E and valve chamber A.
Price 8d7

page_text: Fig. 3 is a vertical cross section of the valve E and valve-chamber A.
Fig. 4 is a vertical section through the lower part of the pump & foot valve.
A is the steam chest having a steam inlet pipe at B, two flat valve seats C, C¹
opposite to and parallel with each other, and a steam tight cover D, secured with
suitable bolts, or covers may be arranged on both sides of the said steam, chest if
desired. The valve E is made preferably with a disc N at each end faced up to
suit seatings C, C. The valve E is carried by and slides on a suitable bar F
which is preferably cast on one of the covers, a suitable hole G being formed in
the valve E to allow of the necessary movement from seat to seat. The bar may
be of any suitable form and may be fitted with wheels, rollers, balls and the like,
to increase the sensitiveness of the valve.
The valve E is actuated by the vacuum formed in each of the pump chambers
alternately through the condensation of the steam as in ordinary pulsating pumps..
For the water valves of this pump I prefer to use a disc valve H, Fig. 4 of the
ordinary type formed of india-rubber leather or other suitable material. The
said valves will move up and down on the central spindle L and to make certain
of their closing and remaining closed, I put a weight J on the top, preferably in
the form of a disc. This weight may be in one piece with the casings sometimes
used to give greater rigidity to the valve and may form a guide, sliding on
spindle Las shown in the drawing, or it may take the form of separate disc
or discs:
I
1
Having now particularly described and ascertained the nature of my said inven-
tion & the manner in which the same is to be operated I declare that what I
claim is,
"
1. In pulsating pumps a steam valve sliding between two seatings as & for the
purposes herein described with reference to Figs. 1, 2 & 3.
2. In pulsating pumps a heavy disc applied to the water valves as 'and for the
purposes herein described with reference to Fig. 4.
Dated this 22nd day of March 1897