Improvements in Pumps.
Year: 1897

page_text: Date of Application, 5th Aug., 1897-Accepted, 22nd Jan., 1898
Improvements in Pumps.
A communication from abroad by Monsieur ZACHARIE JACOMET, of Marseilles.
I, JACOB STEIN, of 27, Saint Mary Axe, in the City of London, 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 relates to pumps, and has for its object the construction and
arrangement of such a device, whereby it is simple and cheap to manufacture, is
double acting and very efficient in action, has few working parts with consequent
small amount of wear and tear, and a general adaptability to a variety of circum-
stances and conditions of working.
In order that this invention may be the better understood I will now proceed to
describe it in relation to the drawings hereunto annexed, reference being had to
the letters and figures marked thereon. Like letters refer to like parts in the
various figures.
Figure 1 is a side sectional elevation of a pump according to my invention
operated by a rack and pinion gear.
Figure 2 is a part sectional end elevation of the same.
Figure 3 is a sectional side elevation of the pump casing showing the plungers
operated by an eccentric.
Figure 4 is a side end elevation of the pump casing at the central joint, showing
the gland and plunger in section.
To carry my invention into effect I form the pump casing A in two similar
The
parts which are jointed together at a, and which contain the pump barrels a¹.
pump casing A has arranged at its lower part a casting D which forms the suction
orifice and supports the valve seats for the valves T.
At the upper part of the casing A is arranged the casting E which forms the
delivery orifice and the delivery valve box for the valves G.
By arranging the valves and their seats in this way, they can be readily renewed
or changed for those of a different material, should it be desired to use the pump
with liquid that corrodes or has a chemical action on the valves and their seats
then in the pump. Further by substituting for the castings D and E as shown,
castings having each a division plate and two orifices, the pump may be made to
pump two different louids at the same time independently.
I arrange a shaft or axle K through the side of the pump casing, which I support
in journals, and around which I place a gland L at that portion where the shaft
passes through the casing. On the outside end of the shaft I fix a lever M, and
upon the portion of the shaft within the casing I provide some means for giving the
plungers a reciprocating motion. In figures 1 and 2 these means consist of a
segmental pinion C, the teeth of which gear into a rack B, formed on the connecting
stem of the two plungers. When the lever M is rocked through an arc the plungers
are moved backward and forward. As shown in Figures and 4 the movement
of the plungers is effected by an eccentric O fixedly mounted on the shaft K and
which is located in a transverse slot P in the stem of the plungers, the shaft passing
through another transverse slot Q normal to the slot P of sufficient length to
allow of the full reciprocation of the plungers.

page_text: A handle or pulley can be attached to the shaft, so that the pump can be operated
by hand or by power.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
The construction and arrangement of a pump, substantially as described and illus-
trated in the accompanying drawings.