An Improved Construction and Arrangement of Pump Valves
Year: 1894

page_text: Date of Application, 27th Dec., 1894-Accepted, 2nd Feb., 1895
COMPLETE SPECIFICATION.
An Improved Construction and Arrangement of Pump Valves
I, THOMAS WILLIAMS, the younger, of Bay Tree Cottage, Church End,
Finchley, in the County of Middlesex, 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:-
The object of the present invention is to so construct the valves of pumps for
raising and forcing liquids as to render the same readily accessible and simulta-
neously removeable in the event of their becoming choked or out of order from
any cause, as by reason of foreign bodies getting into the pump, for example.
According to this invention, fatiange both the valves upon the same axial line
within a valve box, and I so link or connect them together as to permit of their
simultaneous withdrawal from the valve box whilst allowing each valve to lift
independently of the other. The linking device is also so arranged as to control
the lift of the lower or inlet valve.
In the accompanying diawings in which similar letters refer to corresponding
parts in all the figures-
Fig. 1 18 a sectional elevation of a pump for raising and forcing liquids, the
valves of which are constructed and ai rauged in accordance with my invention.
Fig 2 18 a detached view of the linked valves at right angles to Fig. 1.
Fig 3 is a sectional plan on the line 1-2 Fig. 2
a is the cylinder, and b the piston of the pump. c is the valve box which
communicates with the cylinder a by the pipe d. e is the inlet pipe controlled by
the valve and 18 the outlet pipe controlled by the valve ƒ''.
So far the pump above described 18 of a well known type or construction, and its
modus operandi consequently needs no explanation The novel feature consists in
connecting together or linking the two valves ef, which must be arranged upon
the same axial line, by means of the stirrup piece formed on the top of the
valve e' through which stirrup piece the stem of the valve f' passes freely, said
stem having a pin fat its lower end which prevents its withdrawal from the
sturup piece. is a stem which extends from the top of the valve f' to about the
tup of the valve box c, consequently, even in pumps where the valvo box is of very
small diameter, this stem can be readily taken between the finger and thumb aud
the linked valves simultaneously withdrawn from the valve box when required on
removing the screw plug g which closes the latter. The lift of the valve el 18
controlled by the stem, and that of the valve f' by the plug g. h is a leather
washer interposed between the plug g and the valve box
My invention will be found especially useful in the case of the small brine pumps
used by butchers for impregnating meat with brine, the valves of which pumps
frequently become choked and require removal, which by my invention can be
effected without in anywise disturbing or interfering with the pump proper, by
simply removing the plug g which closes the valve box.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The herein described improved construction and arrangement of pump valves,
consueting of linked valves disposed upon the same axial line within a valve box
closed by a removeable plug or cover, the linking devico being so arranged as to
Ch

page_text: permit each valve to lift independently of the other and also to control the
Lift of the lower valve, substantially as and for the purpose described and
illustrated.
2. In combination with the valve box c closed by the screw plug or cover g and
the valves e¹ f¹ contained therein, the stirrup piece, the stem engaging there-
with and the stem f' extending above the valve f' to about the top of the valve
box, substantially as described with reference to and illustrated in the drawings.
Dated this 27th day of December A.D. 1894.
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19, Southampton Buildings, Chancery Lane, London, W.C., Agents.