AN IMPROVED CONSTRUCTION OF DOUBLE-ACTION SUBMERGED FORCE PUMPS
Year: 1864

page_text: PROVISIONAL SPECIFICATION left by Addison Moe at the Office of
the Commissioners of Patents, with his Petition, on the 8th September
1864.
I, ADDISON MOE, of Milwaukie, in the County of Milwaukie, and State
of Wisconsin, U.S.A., do hereby declare the nature of the said Invention
for "AN IMPROVED CONSTRUCTION OF DOUBLE-ACTION SUBMERGED FORCE PUMPS,"
to be as follows:-
In the pump cylinder is placed a hollow piston with a tubular piston rod.
Upou one side of the pump cylinder is a vertical water passage communi-
cating at one end with the upper part of the pump cylinder and at the other
with a horizontal passage under said cylinder.
Between the bottom of the pump cylinder and the top of the horizontal
passage is a suction passage open at one end to the surrounding medium, and
communicating with both the pump cylinder and the said horizontal passage
by an opening in the bottom of the one and top of the other, the said open-
ings being in a vertical line. To cover and uncover these openings a double
puppet valve is employed; the stem of this valve passes upward through the
suction passage into the pump cylinder and downward into the said horizontal
passage. Upon either end of this stem is a circular plate, the upper one of
which works over the opening in the bottom of the pump cylinder and the
lower one over the opening in the top of the horizontal passage. Within the
hollow piston near the side adjacent to the vertical passage is a valve reaching
nearly from top to bottom of said piston; this valve has a tubular aperture

page_text: extending nearly its whole length. This aperture is placed over a vertical
rod, the latter being fixed to a bridge below the valve seat, passing across an
opening formed in the bottom of the piston; in the top of the piston is a
corresponding opening. This valvo plays up and down on the said vertical
rod closing these openings alternately.
When the piston rises a suction is produced in the lower part of the pump
cylinder which causes said puppet valve to rise, uncovering the opening in the
bottom of said cylinder, at the same time covering the opening in the top of
the horizontal passage. The fluid fills the lower part of the cylinder, and the
opening in the bottom of the piston is covered by the valve within the same,
leaving uncovered the corresponding opening in the upper face of the piston
for the admission of the fluid in the upper part of the cylinder into the piston,
which fluid is discharged through the piston rod. When the piston descends
the valve within the piston covers the opening in the upper face of the piston,
at the same time uncovering the corresponding opening in the lower face, and
thereby permitting the fluid in the lower part of the cylinder to pass into the
piston, and to be discharged through the piston rod. The fluid in the lower
part of the cylinder is provented from escaping through the opening in the
bottom thereof by the descent of the puppet valve, the upper circular plate
covering this opening, while it removes the lower circular plate of this valvo
from the opening in the horizontal passage, and causes a current of the fluid
surrounding the pump to enter this passage, and hence up the vertical passage
through the opening between the latter and the upper part of the cylinder;
thus the upper part of the cylinder is filled as the piston descends, and a flow
of fluid through the piston rod is obtained, whether the piston is ascending or
descending.
When this Invention is used for pumping air or other subtle fluids, the
valves may be faced with india-rubber or other similar material.