US276805A

US276805A - auild

Info

Publication number: US276805A
Authority: US
Publication date: 1883-05-01
Anticipated expiration: 1900-05-01

Description

NITED STATES 1 PATENT .OFFICE.

WILLIAM H. GUILD, OF BROOKLYN, NEl/V YORK, ASSIGNOR TO GUILD &

GARRISON, OF SAME PLACE.

ga M SPECIFICATION forming part of Letters Patent No. 276,805, dated May 1, 1883.

Application filed February 21,1883. (No model.)

of Brooklyn, in thecounty of Kings and State of New York, have invented a new and useful Improvement in Pump-Valves, of which the following is a specification.

My invention is applicable to pneumatic and hydraulic pumps, including air-compressors, and relates to valves which. are assisted in closing by means of coiled-wire springs of conical form, which are placed on the valvestems and have a bearing on the back of the valves. In such springs the lower end coil of largest diameter has sometimes been secured by soldering to the next inner coil; but the solder in time is apt to corrode away and release the end of the wire. To avoid soldering, the terminal portion of the outer coil has been turned inward and carried under the inner coils of smaller diameter to the stem, and bent around the stem to secure it; but this latter construction is objectionable, because the turned-in end portion of the wire and the coils resting upon it are worn away by the abrasion between them, and weakened or finally cut in two. The spring which I employ belongs to the class last above described; and the object of my invention is to prevent. the abrasion and cutting away of the turned-in portion of the wire and the coils under which "such turned-in portion passes.

To this end my invention consists in arching or bowing upward the lower coils of the spring at the points where the turned-in portion intersects them, so that the said coils will have a' bearing on the valve on each side of the turnedin and intersecting portion, and will be held out of contact with said turned-in portion, as hereinafter more fully described.

In the accompanying drawings, Figure 1 represents a side view of a spring embodying my invention and a valve to which the spring is applied; and Fig. 2 represents atransverse section through the stem, and a plan of the spring and valve.

Similar letters of reference designate corresponding parts in both figures.

A designates a valve-seat, here shown as provided with an external screw thread, whereby it may be secured in place; and B designates a disk valve of ordinary form, which is adapted to play up and down on the fixed stem 0. The valve ,is aided in closing by a coiled-wire spring, D, of conical form, applied between the valve and the head of the stem 0. The wire at the upper and smaller end of the'spring D is formed into an eye, a, through which the stem passes, and the lower end portion, 1), of the wire, after forming the lower and outermost coil, 0, is turned inward and passes under all the other coils of the spring to the stem, and is formed with an eye, a, to fit the stem. The two ends of the wire are therefore secured without solder to the stem 0. a.

So far asdescribed the spring does not differ from those before made 5 but such springs have heretofore been objectionable, because one or more of the inner coils, c, of smaller diameter, have rested upon the turned-in portion b of the wire at their points of intersection 0 To obviate this objection I arch or bow upward the one or more coils c at 0 so that. they pass over the turned-in portion 1) of the wire without touching it, as best shown in Fig. l. The coils c then have a bearing on the valve throughout their circumference, and on opposite sides of and close to the turned-in portion 1), and in the action of the spring there is no abrasion between the coils c and portion 1), and consequently no cutting away of either part. i

I have chosen for the purpose of illustration a very common form of valve 5; but of course my invention is applicable to valves of other forms-as, for example, valves having their upper surfaces or backs slightly conical instead of flat.

What I claim as my invention, and desire to secure by Letters Patent, is--- 1. The combination, with a valve and its stem, of the coiled spring having the terminal portions of its outer coil turned inward under the coils to the stem, and having one or more of its coils arched or bowed upward at their intersection with said turned-in portion, so as to prevent abrasion between said coil or coils as to cross said turned-in portion without and said turned-in portion, and allow the said touching it, substantially as and for the pur- :o coil or coils to bear on the valve throughout pose herein described. 1 their entire circumference, substantially as v herein described. GUILD 2. The spring for a pump-valve, having the Witnesses: turned-in portion b, and having one or more FREDK. HAYNES,

of its coils arched or bent upward, as at 0 so ED. L. MORAN.