CERTAIN IMPROVEMENTS. IN PUMPS
Year: 1865

page_text: Sealed the 31st October 1865, and dated the 1st May 1865.
COMPLETE SPECIFICATION filed by the said Charles Edward Herpst at
the Office of the Commissioners of Patents, with bis Petition and Decla-
ration on the 1st May 1865, pursuant to the 9th Section of the Patent
Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
EDWARD HERPST, of No. 3, Rue Jean Jacques Rousseau, Paris, in the Empire
of France, Mechanical Engineer and Patent Agent, send greeting.
WHEREAS I am in possession of an Invention for "CERTAIN IMPROVEMENTS.
IN PUMPS," and have petitioned Her Majesty to grant unto me, my executors,
administrators, and assigns, Her Royal Letters Patent for the same, and have
made solemn Declaration that it is a communication from Messieurs Armand
Labarre and Aimé Bellet Dusourd, persons resident at No. 3, Rue Jean
Jacques Rousseau, Paris, in the Empire of France.
NOW KNOW YE, that I, the said Charles Edward Herpst, do hereby
declare that the following Complete Specification under my hand and seal fully

page_text: -describes and ascertains the nature of the said Invention, and in what manner
the same is to be performed, in and by the following statement, reference
*being had to the Drawing hereunto annexed, and to the figures and letters
smarked thereon, that is to say :-
The improved pump consists of a cylinder A, enclosing a piston B, furnished
with a leather washer, or any other suitable packing.
When the apparatus is placed at the-bottom-of a well, as represented in the
Drawing, the extremity of the rod of the piston is supplied with a chain
wound on a drum by means of the mechanism C. To produce the upward
movement of the piston, I cause the mechanism C to work, and the liquid
drawn in by the valve D having always a tendency to fill the vacuum
and to regain its level, obliges the piston to rise and consequently necessitates
very little force for its upward movement. When the liquid is driven back
it closes the valve D and opens the valve E, and rises by the egress tube F.
with a force increasing proportionally to the weight of the piston, which alone
acts on the liquid; but if, in consequence of the quantity of water to be
drawn in the weight itself of the piston is not sufficient I load this piston
with a double or triple weight G, G, and thus obtain an increase of power for
raising the water to a considerable elevation.
Having now described the nature of the said Invention, communicated to
me, and the manner of carrying the same into effect, I wish it to be under-
stood that I do not confine myself to the precise details herein laid down, so
long as the peculiar character of the Invention be retained; but what I claim
is, the mode of raising water by means of a piston pressing the water by its
weight, which can be increased or diminished at pleasure, as herein-before
described, reference being had to the Drawing.
In witness whereof, I, the said Charles Edward Herpst, have hereto
set my hand and seal, this Twenty-eighth day of April, in, the year of
our Lord One thousand-eight hundred and sixty-five.
Witness,
HY. GILBEE,
10, Rue de la Fidélité,
Paris.
28th April 1865.
"
CH. E. HERPST. (L.S.)