US10951A - Pump-valve - Google Patents

Description

L. A. MILES.

PUMP.

Patented May 23, 1854.

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L. A. MILES, OF HOPKINSVILLE, OHIO.

PUMP-VALVE.

Specification of Letters Patent No. 10,951, dated May 23, 1854.

To all whom, it may concern:

Be it known that I, LEWIS A. MILES, of I-Iopkinsville, in the county of Warren and State of Ohio, have invented new and usefulImprovements in Pumps; and I do hereby declare the following to be a full, true, and exact description thereof, reference being had to the annexed drawings,'making part of this specification. I

My improvements have for their object an improved form for a metallic valve playing on a leather seat.

In the accompanying drawings Figure 1 is a vertical section through my pump. Fig. 2 is a perspective View of one of the valves. Fig. 3 is a perspective view of the, ring sheath. Fig. 4 is a perspective view of the cup sheath.

(a) are the pump barrels or cylinders. The washers (b c) and leather cups (cl) do not differ materially from others now in use. The piston is provided with an elastic metallic sheath (6 or e), which, partially inclosing the leather, only leaves exposed just so much of it as insures a tight joint, the main duty of the piston devolving on the metallic sheath, which thus protecting the leather the piston lasts much longer, and

as most of the rubbing is of metal against metal the friction and labor are reduced to a very small amount. At (6) and (6) respectively are shown two slightly different forms of this elastic sheath; one (6) consisting of a split ring and the other e) of a cup, having its rim slit at regular intervals around its circumference. The contiguous edges of these slits are made to lap obliquely over each other, so as to make an even continuous surface, notwithstanding any slight expansion or contraction of the sheath.

The feature of peculiarity in my pump consists in a device which causes the valves to drop flatly onto their seats instead of digging and wearing the seats by the working of the heels of the valves upon them, which metallic valves, working on leather seats, are apt to do, so much so indeed as to be from this cause notoriously liable to leakage at that part. This device consistscf a pivot (f), which having free play within eyes (9) at the valve heel, terminates 1n cranks (1), which are journaled to sockets in the sides of the water passages, to which the valve is thus united by a double hinge.

At the midlength of this pivot is tongue (f), which, leaning over in dir ction of the valve, rests. upon its top. Th mutual action of this tongue and of the doubly j ournaled pivot is such that in the upward motion of the valve the latter, pressing against the tongue, forbids any rotation of the pivot in the eyes of the valve, so that the crank journals (f) come exclusively into play, and thereby the valve heel is lifted clear off of its seat, and in the closing motion the front of the valve, dropping a little faster than the heel, (see dotted lines,) counteracts. the objectionable tendency before alluded to. I

The customary method of depending on the reverse current of water to close the valve evidently involves a loss of water to effect the object and is the great and sole cause of the slamming of valves and consequently an agent of their destruction. This defect may be removed by the application of a spring (71:) to the top of the valve in such a Way that a little before the latter reaches the upper portion of its stroke the free extremity of the spring, coming in contact with the top of the valve chamber and the water being now just at the turn of its motion-the force of the spring bcing no longer opposed by any current of waterinstantly closes the valve, before any of the water, to speak of, has time to escape and the valve not having waited for the violently accelerating motion of the returning water avoids all slamming upon its seat. The spring (is) may either be attached to the valve in the manner represented or to the top of the chamber.

I claim as new and of my invention and desire to secure by Letters Patent The valve, united by a double hinge to the chamber, in combination with the tongue which, projecting from the pivot, bears L. A. MILES.

lVit-nesses GEO. H. KNIGHT, J. H. GETZENDANNER.

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