AN IMPROVED DOUBLE- ACTING HYDRONETTE FOR HAND AND FOOT POWER."
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Charles Gustave Mueller at the Office
of the Commissioners of Patents on the 12th August 1878.
CHARLES GUSTAVE MUELLER, of Hannover, Prussia. AN IMPROVED DOUBLE-
ACTING HYDRONETTE FOR HAND AND FOOT POWER."
This Invention relates to an improved double-acting hydronette for hand and
foot power, called hydrojector, which is specially intended for domestic and garden
purposes.
As represented on the annexed Sheet of Drawings the water is distributed in
the pump barrel A by a slide valve B combined with the piston F, while the
suction pipe C and the discharge pipe D constitute two piston rods; E', E2, is a
cylindrical piece brazed to the two pipes C and D and containing an angulated or
otherwise suitably shaped partition wall e which divides it into two chambers, the
one E' communicating with pipe C, the other E2 with pipe D.
On the accurately turned outside of the piece E¹, E², the cylindrical slide B works,
alternately closing and opening the ports 1, 2, 3, 4.
The action of the described parts is as follows:-The pipe C being held in one
hand, the pump barrel A is moved by the other. If the barrel is pushed in the
direction of the arrows x, x, the friction between it and the piston F causes the
slide B, constituting with the piston a single piece, to be shifted in the direction of
In conse-
motion of A so as to open the ports 1 and 3, while 2 and 4 are closed.
quence water will be sucked in below the piston through pipe C and port 1 and
When the notion of A is reserved
discharged, from above by port 3 and pipe D.
ports 2 and 4 are opened and 1 and 3 closed, whereby the water is caused to pass
from C through port 2 above the piston into the barrel, while the discharge takes
place from below the piston through port 4 into pipe D.
It will be observerd that this pump is thus double acting; that in consequence of
the substitution of a slide valve for ball or other beat valves the barrel may be held
in any position whether inclined or otherwise; and, finally, that the shifting of the
slide valve takes place at the very moment when the stroke of the barrel is
changed.

page_text: The air vessel with which the described hydrojector is or may be provided consists
of a vessel of metal, by preference cylindrical, which is divided into two chambers
by an india-rubber or other flexible and air-tight diaphragm. One of these cham-
bers is closed all round and filled with air while the other communicates with the
pipe D and with the nozzle. When water is forced through the latter chamber it
will press on the diaphragm and consequently compress the air contained in the
former. This air vessel has the advantage in common with the pump of acting
equally well in any position whatever. The said diaphragm may be made in
shape of a hose which forms by itself one chamber while the other chamber sur-
rounds it.
.
For the purpose of causing the apparatus to throw out the water in form of
spray a small cone is used which is directed with its apex towards the centre
of the nozzle. This cone is fixed to a ring which can be turned on a boss
attached eccentrically to the nozzle, so that it may be used or put out of use
according to desire.
The mechanism for operating the described bydrojector by foot power is arranged
in the following manner :-The pipes C and D are fixed in suitable standards
attached to a bed plate. On this plate a double thrée-branched lever is pivotted,
the two upright center branches being jointed by short connecting rods to the barrel
A, while the other two pairs of branches form treadles. The person who works this
hydrojector stands with his heels on parts of the bed plate specially provided
therefor and alternately presses down the treadles by the motion of his feet.