US131801A - Improvement in rotary pumps - Google Patents

Description

N' UNITED SrAIEs sAMUED A. wEsT,-or sANEEANoIsoo, cALIEoENIA, AND LEwIs eooDwIN,

0E vIEGINIA CITY, NEVADA. l

IMPROVEMENT IN Roi- ARV PuMPs.

Specification formingpart of Letters Patent No. SLSGL dated October 1, 1872.

To allwhom it may concern:

Be it known thatwe, SAMUEL ALEXANDER WEST, of the city and county of San Francisco, State of California, and LEWIS GOODWIN,

of Virginia City,county of Storey and State of Nevada, have invented an Improved Rotary (lift and force) Pump and We do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters marked thereon.

Our invention relates to certain improvements in pumps of that class in which an eccentrically-Inounted piston revolves upon its shaft within a cylindrical case, and which are known asrotary pumps; and it consists, mainly, in a novel construction and arrangement of the "piston and its connection with the operating eccentric by means of conical or other shaped friction-rollers, either with or without centers, whereby all the working parts are caused to r'un with the least possible friction, and all wear can be easily compensated. It

` Vfurther consists in the employment ofa rubber packing upon the outside or inside cylinder, or both, and a rollingcontact of the parts, Vwhich gives smoothness and a close lit. A

sliding valve or diaphragm is iitted to move automatically with the piston and separate the suction and discharge chambers, and this is also provided with friction-rollers. The ends ofthe piston are channeled, and an adjustable packing-plate is set up by adjustingscrews, so that water is employed to make the r parts as vtight as may be desired while in action without creating unnecessary friction.

Referring. to the drawing ...for a more complete explanation of our invention, Figure l Ais a side elevation of the pump with the side of the case removed, showing the packingplate. Fig. 2 is a vertical section of the pump with the packing-plate removed. Fig. 3 isa perspective view of one of the rollers. Fig. 4 is a transverse section taken through Fig. l.

Similar letters indicate like parts.

A is the caseof thepump, which is made preferably in the form of a short cylinder of large proportional diameter, and provided at one side with suction and discharge chambers B and C, suitable pipes leading from each. These chambers are separated by a partition,

which is made to suit. This eccentric is, in

the present case, made of ftwo frustums of cones keyed to the shaft, so as to stand a short distance apart and withtheir smaller ends 'tojward each other, but itis manifest that other devices might be made to answer. The piston proper I consists of a cylinder made somewhat smaller than the interior of tlie case, and its outer surface is covered with a rubber pack- The interior is made conical, as shown,

ing, J and between this piston 'and the eccentric H is placed a number of rollers, K. rollers are made, in the present instance, in the form of double cones or frustum's, the bases lying together, so that when in place they just fit the groovesy made by'the peculiar shapes of the -eccentric. and the piston, as before described. rlhe two parts of the eccentric H are so itted that they can be moved nearer together on the key or feather by nuts r, and by this means, with the conical rollers described above, any wear of the parts can ,be easily compensated. A washer, S5 is placed between the nuts and the sides ofthe eccentric to give elasticity and relieve the strain. The outer edges of the piston are channeled, as shown at L, for a purpose to be hereafter described. The partition D is slotted, as shown, and a movable sliding diaphragm, M, fits into this slot, being as wide'as the piston. This diaphragm is made hollow below, as shown', to relieve the frictionfofthe moving parts.' Arms extend upon each side of this diaphragm, and at their ends carry rollers N, which fit into the channels L, and as the piston is carried around by the movements of the eccentric the diaphragm is moved out and in, thus always keeping the divisions complete between the inlet and discharge chambers. A

friction-roller, O, also moves at the edge of the diaphragm and against the facerot' the piston to insure freedom of action. At` the ends of the piston are plates P, which are adjusted by set-screws Q from the outside, and

are by this means brought as close to the ends of the piston as may be necessary, and when the pump is running the water contained in These the channels L serves as a packing, which is of superior tightness, with the least possible friction.

The operation of our pump will be as follows: The pump being driven by the proper power applied to the shaft Gr, by means of a pulley or otherwise, the shaft and the eccen- 'tric II will be rapidly rotated. This eccentric movement will be communicated to the piston I by means of the rollers K, so that the piston will move around the interior of the pumpcase with a rolling contact, thus driving the water from the suction-chamber around to the discharge-chamber, from which it passes by means of a pipe. v

By this construction we are enabled to greatly reduce the friction and to render thev pump perfectly tight with the least possible Wear on the parts.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. The piston I, in combination with the rollers K and the adjustable eccentric H, substantially` as and for the purpose described.

2. The rollers K, when constructed in the form of a double cone, together with the beveled eccentric H and the beveled interior of the piston, for the purpose of retaining the latter in its central position in the case at all times, substantially as herein described.

3., The piston I, operated as herein shown, and provided with the elastic face J, for the purpose of giving a perfect rolling contact at all times, substantially as described.

4. The side plates l?, with their adjustingscrews Q, in combination with the piston I, substantially as and for the purpose described.

5. In combination with the adjustable packing-plates P, we claim the piston I, when channeled or chamber-ed at L for the purpose of

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