Pump Page: 4 of 4
[1], 3 p. : ill. ; 23 cm.View a full description of this patent.
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731,892
The valve 12 may be provided with a con-
tact-piece 40 to be engaged by the piston 14
on its downward movement to tilt and open
said valve to allow the water in the lower
5 end of the piston-chamber to discharge to pre-
vent it from freezing in said chamber in cold
weather. The wall of the passage 10,may
also be formed in its side with an opening
closed by a plug 41, which may be removed
10 to permit of the insertion of a tool or wire to
open the valve 13 to-allow water to-discharge
from the passage 3.for the same purpose. By
thus forming the opening in the side of said
passage out of the direct line of the flow of
5 the discharging water the valve maybe held
open without the icy water coming in con-
tact with the hand of the operator.
From the foregoing description, taken in
connection with the accompanying drawings,
20 the construction, mode of operation, and ad-
vantages of the pump will be readily under-
stood, and it will be seen that the invention
provides a double-acting pump which is easily
operated, in which the pistons are accurately
25 balanced to insure a smoothness of operation,
and in which the interior parts are freely ac-
cessible for cleaning and repairs.
Changes in the form, proportion, and mi-
nor details of construction may be made with-
30 in the scope of the invention without depart-
ing from the spirit or sacrificing any of the
advantages thereof.
Having thus fully described my invention,
what I claim as new, and desire to' secure by
35 Letters Patent, is-
1. In a pump, the combination of a barrel
provided with a piston-chamber, and a water-
passage in communication with the upper end
of said chamber, check-valved water-inlets
40 communicating with the lower ends of said
chamber and passage, the inlet communicat-
ing with the passage being provided in its
side with an opening for the insertion of an
implement to force open the coacting check-
45 valve to allow the water in the passage to.
flow back through the inlet, said opening be-
ing thus located out of the direct line of flow
of the discharging water, means for closing
said opening, a valved duplex piston mount-ed to reciprocate in the piston-chamber, and 50
means whereby the check-valve controlling
the inlet communicating with the piston-
chamber may be opened to allow the water
contained in said chamber to drain back into
said inlet, substantially as described. 55
2. In a pump, the combination of a barrel
having a piston-chamber, water-inlets com-
municating with the opposite ends of the
chamber, a duplex-piston mounted for opera-
tion in the chamber, an air-vent arrangedto 6o
permit the escape of air from the barrel to
allow water to completely fill the barrel and
prime the pump for operation, and means for
sealing said vent.
3. In a pump, the combination of a barrel 65
having a piston-chamber, water-inlets com-
municating with the opposite ends of the
chamber, a duplex piston mounted for opera-
tion in the chamber, an air-vent aperture ar-
ranged to permit the escape of air from the 70
barrel to allow water to completely fill the
barrel and prime the pump for operation, and
a movable cover for closing said vent, sub-
stantially as described.
4. In a pump, the combination of a verti- 75
cal barrel provided with check-valved water-
inlets communicating with its opposite ends
and having a head at its upper end formed
with an air-vent aperture, a reciprocatory du-
plex piston working in the barrel, and a piv- 8o
oted cover on the head for closing said air-
vent aperture, substantially as described.
5. In a pump, the combination of a verti-
cal barrel having a piston-chamber and pro-
vided with an air-vent at its upper end, wa- 85
ter-inlets communicating with the opposite
ends of the chamber, a duplex piston operat-
ing in the chamber, means for operating the
piston, and means for sealing the air-vent,
substantially as described. 90
In testimony whereof I have hereunto set
my hand in presence of two subscribing wit-
nesses.
SAM. N. HALL.
Witnesses:
R. ABRAMSON, Jr.,
J. M. JOHNSON.a
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Reference the current page of this Patent.
Hall, Sam N. Pump, patent, June 23, 1903; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512935/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.