US110297A - Improvement in pumps - Google Patents

Description

N- PETERS Fmmmnocmmu, WASHINGTON, n4 c.

N.FETERS. PMOTKLUTHOGRAPMER. WASHINGTON. D. CV I cart (effin,

NATHANIL P. SHELDON: OF-SAN FRANCISCO, CALIFORNIA.

Letters Patent No. 110,297, dated December 20, 1870 antedated December 16, 1870.'

IMPROVEMENT IN PUMPS.

The Schedule :exerted to in these Letters Patent and making-part of the same.

I, NATHANIEL P. SHELDON, of the city and county of San Francisco, in the State of California, have invented certain Improvementsiu Pumps, applicable also to Hydraulic and Steam-Engines, of which improvements the 'followihg is a specification.

The nature of my invention relates to an engine or pump in which the cylinder or barrel is so shaped or cast as to form the segmentof a circle, and provided about midway between its ends with apertures or openings, capable of being opened or closed for the admission of steam or water.

The piston or plunger of said engine or pump consists of a tube bent in the shape of an arc of a circle, having a common center' with the center ofthe circle of which the cylinder or barrel forms a segment.

` The ends of said plunger or piston are packed and fitted -into the open ends of said cylinder or barrel, and about midway between said ends is attached to one end of an oscillating beam, which has a journal at its other end, having-a bearing at the center of the circle of which the plunger or piston forms van arc.

At the ends, or any other convenient part of said plunger or piston, suitable valves are arranged to be opened or closed, as the case'requires, as each side of the cylinder or barrel is to be emptied Aor filled with steam` or water.

The piston or plunger is inclosed, and moves in a semi-cylindrical casing attached to the segment form-- ing the cylinder or barrel, and the'water or exhaust steam is discharged through said plunger into said casing previous to its discharge from the apparatus.

The casing thus forms an air-chamberor condensing-chamber, as the apparatus may be used 'for a pump or steam-engine. A

Description of theAccompang/ng Drawings. Figure 1, sheet 1, is a sectional view of a pump. Figure 2, sheet 1,'is an end view of a pump. Figure 3, sheet 1, vis a side View of a pump.` Figure 1, sheet 2, is a sectional view of a hydraulic engine.

Figure 2, sheet 2, an end view of a hydraulic engine.

Figure 3, sheet 2, a side view of a hydraulic engine.

gine.

Figure 2, sheet 3, an end view of a steam-engine. Figure 3, sheet 3, a side view of a steam-engine.

Gen-eral Description.

Figure 1, sheet 3, a sectional view of asteam-en circular form, and smoothly` turned to avoid friction. The remaining portion thereof may be of any desired form forarranging the valves.

A single valve ymay be used, as shown in th`e drawing ofthe pump, or a partition may be placed in the center of the plunger, audvalves placed upon either side thereof'.

B B are the receiving-chambers, andl are made of one casting, separated by aA partition in the center. The upper ends of these chambers terminate in stuifing-boxes, through which the respect-ive ends ot' the plunger play.

Surrounding these stuug-boxes is a disk, covering the receiving-chambers, andd forming a base for'the air-chamber. In the lower portion of each receivingchamber is an open port, for receiving water from the suction-ports.

C is the air-chamber, and is made of au oval form, corresponding to the form of the disk upon the receiving-chamber, which forms its base. A discharge-pipe is cast around the air-chamber, with openings into the cavity of the air-chamber at the bottom, for reeeiring therefrom, and with an outward opening on top, for discharging into'tlie conducting-pipe.

D is the division or partition-between the receivingchambers and the ports therein,

E E are the stufiing-boxes upon the receiving-chamber, through which the plunger plays. v

E is a stuffing-box, oneof which is formed in vthe air and receiving-chambers (one-half in each) upon either side, forthe purpose" of packing around the shaft. v F, is the disk, covering thetop of the receivingchambers outside of the stuiug-boxes, the outer edge serving as aange for attaching it to the flange of the air-chamber.

G G are glands, for pressing the packing into the stuling-bxes. l

HV is a device for forming a double valve-seat, whose ports open into the open ports ofthe receiving-chambers. I is a valve in the plunger.

1 l are valves upon the suction-ports.

K is a shaft, to which the plunger is attached, and byY which it is -woi-ked. y I

L' is a flange for attaching the plunger to the shaft. M is a flange around the air-chamber.

N is the discharge-pipe therefrom.

. N1 is the discharge-pipe from the hydraulic-engine.v

Nz is the discharge-pipe from the steam-engine. 0 is au oscillating-valve in the hydraulic and steamengine, to be opened and closed by mechanical action.

O is a discharge-valve in the hydraulic-engine. P is a lever, attached .to au eccentric, for working the oscillating valves.

piston into ythe condensing-chamber.

W W are ports for admitting cold water into the condensingfchamhers.

Forincreasing the capacity of the plunger, it may be made of an oval Aor parallelogram form, t-hereby increasing its size in alateral direction only, adapting the form of the chambers to correspond.

If needed for supplying the air-chamber with air when working under a heavy pressure, an air-cock may be placed in one of the receiving-chambers, and

by opening it upon the receiving-stroke, and closing it upon the discharging-stroke, supply the airfchamber of a pump with the required amount, or, if rcquired for au air-pump, a vvalve opening by pressure from without, and closed by pressure from within, may be placed in the receiving-chambers and air pumped through water.

In the operation of my'nvention as a pump, the receiving-chambers are alternately' filled and discharged by the upward 'and downward motion of the respective ends of the plunger working therein, thus keeping up a constant flow intov the air-chamber, from whence it' is discharged by the elastic property of the air.

. A rapid motion may be given to the plunger, the elastic property of the air 'in which the valves play, together with the form of the plunger, preventing the jar or concussion caused by direct contact with water under a heavy pressure.

In the operation of my invention as' a hydraulic or Y steam-en gine, the water or steam is forced by pressure into the receiving-chambers as the ports are opened and closed by the action of the oscillating valves, and in like manner. discharged through the valves upon their respective.pistons.

I claim as my invention- 1. 'lhe segmental cylinder or barrel, in combination with the oscillating plunger or piston, substantially asv herein descrihed.-

2, In combination with the .segmental cylinder, the air-chamber or condensing-chamber inclosing the plunger or piston, substantially as herein described.

NATHANIEL P. SHELDON.

Witnesses:

DAVID L. SMITH, HORACEA W. SMITH.

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