US164631A - Improvement in pumps - Google Patents

Description

UNITED SAMUEL ARNDT AND NVALLAOE S. AYRES, OF EASTON, PENNSYLVANIA.

IMPROVEMENT IN PUMPS.

Speciticalion forming part of Leiters Patent No. 164,631, dated June 22, i875; application tiled May 20, 1373.

To all 'whom fitmay concern Be it knownthat we, SAMUEL ARNDT and WALLAcE S. AYREs, both of Easton, in the county of Northampton and State of Pennsylvania, have invented certain Improvements in Pumps, of which the following is a specilication:

Our invention relates to that class of pumps used in giving motion to luids whose valves are closed by the return action of the iiuid drawn or forced through them.

The object of our invention is to prevent the destructive effects of non-elastic fluids to the pump by the introduction of air into the iiuid in the most simple, effective, and practicable manner.

To give a more clear and definite idea of our invention, its action, and application than could be given in a general way, we will conne the description to the feed-water pumps of locomotives.

In the drawing, Figure l represents a sectional view of a feed-water pump. A is the plunger and pump-barrel; B, the supply-pipe leading from the water-tank 5 C and D, the

induction and ejection valves 3 F, the ejectionpipe leading to the boiler; G, the supplychamber. Fig. 2 represents a vertical section 0f the check-valve, together with a horizontal section of the same through a a, looking upward. This valve is connected with the ejection-pipe of the pump by the neck T, is fastened to the boiler by the flange f f, and prevents the water forced into the boiler from returning. E is the valve proper, resting upon its seat r r. c c is the valve-cage, which governs the lift of the valve, and guides it in its mot-ion. These valves O, D, and E have been a source of annoyance both to engineer and machinist, on account of the noise in closing and their constant wear. This annoyanee,to gether with the leaking of joints from excessive strains, has, to a certain extent, been prevented by the introduction of air into the valve-box of the pump. le propose to introduce the air, not into the valve-box, but into the supplypipe or chamber through the air valve N, which we have termed The Pneumatic,77 and which we claim is of our own invention. Fig. 3 represents a section and plan of The-Pneumatic. It con-- sists of any ordinary tap-plug, as H, drilled through the center, with the inner end rea ed out, forming the valve-seat a n. The valve K is ground to its seat, and has a stem itting loosely in the plug and long enough to pass through it, with a slot, S, cut in the stem, longer than the necessary lift of the valve, to allow for the thickness of the pin I). Through this slot S, and through the plug, is passed the pin l?. This pin prevents the valve being drawn from its place, and adjusts the lift.4 This air-valve N, Fig. l, must always be placed in a vertical position, openinginward and upward, and always on the receiving side of the induction-valve, substantially as shown inthe drawing. Now, when the plunger A draws the Water into the pump-barrel, it also draws in a small quantity oi' air through the airvalve N. This air, in passing into the supplyl at this point, meets the stream of water where it is in the greatest state of agitation, owing to the sudden change oi' direction which it here makes, and is at once divided into smaller bubbles. On passing the induction-valve of the pump, the bubbles are subdivided into very minute ones, and are thoroughly mixed with the water, making it quite elastic. An air-chamber has been found to be of service in relieving the shocks and strains in themachinery ot' the pump, incident to the non-elasticity of the water, and air introduced into the water at the valve-box proves to be a better remedy; but, to introduce the air at the point which we have designated, we are assured accomplishes the desired end in every way, with these virtues, which we claim, viz

The mechanism used to introduce the air is very simple, and hence not liable to disorder. The amount of air introduced, being divided into very minute bubbles, and thoroughly mixed with the water, is a minimum in quantity-hence at the least sacrifice of the workin g capacity of the pump.

Byintroducingthe air into the supply on the receiving side of the induction-valve, the supply-pipe or chamber, together with the induetion-valve, is relieved from all destructive shocks and strains.

By combining the air-valve with a tap-plug, it can be removed for repairs at anytime, and a similar or solid plug screwed into its place until repairs are completed, thus allowing the pump to continue Working.v Also, by combining the air-valve with a tap-plug, and adjusting the lit't by means of the slot S and pin P,

or its equivalent, the valve is shielded from any alteration by external agencies.

The invention above described can be applied to the feed-Water pumps of stationary and marine engines; also to any engine, pump,

or machine laboring under difticulties likeV those above mentioned.

Having described our invention, its action,

and application, what We claim therein as newy and of our own invention, and desire to secure by Letters Patent, is-

l. The combination, with the supply-pipe SAMUEL ARNDT.

WALLACE S. AYRES.

Witnesses:

W. H. HILDEBRAND, WM. ABLE.

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