US33323A - Improvement in pumps - Google Patents

Description

'N4 PETERS. PHOTO-LITHOGRAFHEIR/WASHINGTON.- D. C.

UNITED STATES PATENT OFFICE.

GILBERT VAN CAMP, OF SOMERSET COUNTY, NEWv JERSEY, ASSIGNOR TO HIMSELF AND JASPER BERGER, OE SAME PLACE.

IMPROVEMENT IN suivies.

Specification forming part of Letters Patent No. 33,323, dated September 17, 1861.

To all whom t may concern.-

Beit known that I, GILBERT VAN CAMP, of the county of Somerset and State of New Jersey, have invented a new and useful Improvement in Pumps; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

In constructing double-acting pumps with cylinder-heads and ball-valves the piston has heretofore been worked in a slot in the side ot' the cylinder. By this arrangement it is impossible to pack the piston-rod, and the slightest imperfection or Wear in the piston produces leakage first into the central portion of the cylinder and then through the slot around the piston-rod, thus occasioning great inconvenience by producing increased friction and other disadvantages, which altogether render such pumps of comparatively little value. The object of my invention is to overcome these dilicultiesand at the same time to adord a pump of very simple and cheap construction.

My invention consists of a peculiar arrangement of a short cylinder and solid single piston, in combination with cylinder-caps provided with ball-valves in the usual manner, and also in the combination and arrangement of the cylinder-cap with a packing-box for the piston-rod.

The accompanying drawings represent a vertical section of a pump with my improvements.

The cylinderAis usually made very shortsay about seven inches. The piston B is solid and plays the whole length of cylinder A, thus having a stroke of only six inches and acting both in its forward and in its backward motion.

Cast in the same piece with cylinder A are two water-passages, one above the cylinder andthe other below, as seen in the drawings. Attached to the ends of the cylinder are two caps c c', provided with ball-valves D. The seats of the two upper valves are cast in the caps,while the seatsof the twolower ones are at the ends of the lower water-passages, as shown in Figure l. These caps are secured to the cylinder by a screwbolt, and the joint should be packed by rubber, as indicated in blue in the drawings. There is also at'th valve E placed below the lower water-passage, and all the joints are packed in the usual manner.

Above the cylinder A and upper water-passage is an air-chamber G, with a tube H extending from the top nearly to the bottom of said chamber. Above this chamber is a curved tube I, which serves as the pump-spout, and to which a hose may be screwed for various purposes. The piston is intended to be worked by hand by means of the lever and connecting-rod; but it may be operated in any other manner. i

One of the cylinder-caps C is provided with a common packing-box, through which the piston-rod works directly into the end of the cylinder through the main chamber of the cap C. By this simple arrangement of the piston` rod, in connection with the cap and cylinder, the practical working of the pump is much improved, at the same time the construction as a whole is cheaper. The stroke of the piston is made the whole length of cylinder. As the piston advances toward left it forces a volume of water equal to the whole contents of the cylinder up through the upper Valve in the course indicated by the black arrow on the left hand in the drawings. At the same moment the water'tlows into the cylinder on the right through the lower valve, as indicated by the black arrow on the right. Thus the cylinder is kept constantly full, the water pressing upon both sides of the piston-head B. On the return-stroke of the piston toward the right the valves by the black arrows are closed and the other two ballvalves are opened, so that the cylinder is again emptied and lled, the water flowing in the direction indicated by the red arrows. Thus the cylinder is tilled and emptied at every stroke of the piston whether forward or backward.

It will be observed that the short cylinder A, about seven inches in length, the pist-on B,

and the piston-rod, seven inches in length, are the only joints which require nice Workmanship. The cylinder is closed by fixed joints packed with rubber and not liable to injury; also, the packing-box ,M contains a rubber packing to secure against leakage, so that the working parts are constructed Very cheaply and not liable to need repairs. As the water presses upon both sides of the solid piston-head B, slight wear will not seriously affect the working of the piston.

I am aware that the cylinder-heads, with thevalvesandwater-passagesabovedescriberl, are not new'. Therefore I do not claim these or any of the separate devices as-such; but I believe that my arrangement of these devices is new, forming a pump which, asa Whole, is a great improvement upon other pumps of similar construction.

Having thus fully described my invention7 what I claim, and desire to secure by Letters Patent of thc United States, is-

1. The combination and arrangement of the short closed cylinder A', the solid piston B,

working from'end to end of said cylinder in A connection with the cylinder-caps C and C', substantially in the manner and for the purposes set forth.

2. In combination therewith, the cylindercap C and the stufngbox M, as and for the purposes herein set forth.

In Witness whereof I have hereunto set my hand this 11th day of October, 1860.

' GILBERT VAN CAMP.

Witnesses:

" EDWF. BROWN,

DANIEL BREED.

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