US241930A - Valve for air-compressors - Google Patents

Description

( Model.)

J. CLAYTON. Valve for Air Compressors.

' No. 241,930. Patented May 24,1881.

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UNITED STATES PATENT OFFICE.

JAMES CLAYTON, OF BROOKLYN, NEW YORK.

VALVE FOR AlR-COMPRESSORS.

SPECIFICATION forming part of Letters Patent No. 241,930, dated May 24, 1881.

Application filed May 31,1880. (N 0 model.)

To all whom it may concern:

Be it known that I, JAMES CLAYTON, of

Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Valves for Air-Compressors, of which the following is a specification.

In air-compressors the cylinder heads of which are provided with air-inlet valves of disk form mounted on centralstems which are longitudinally movable in guides in the val veseats accidents are often occasioned by reason of the valves becoming detached through the breaking of their stems or the unscrewing of the nuts which hold them to their seats. If so detached, the valve will drop inside the cylinder, and, becomin g jammed between the piston and cylinder-head, will often cause a serious breakage of the machine.

The object of my invention is to provide a simple and easily-applied means whereby the valve, when so detached from its seat, is prevented from dropping into the cylinder and causing breakage. V

To this end my invention consists in the combination, with a disk-like valve-seat and valve for an air-compressor, of one or more guardbolts rigidly fixed in the valve and working through the seat, but having no other connection with the valve or seat, and provided back or inside of the seat with heads or nuts forming shoulders, which, in case of the breakage of the valve-stem, will strike upon the inside of the seat and prevent the valve from dropping into the cylinder.

In the accompanying drawings, Figure 1 represents a partially-sectional side view of a suction or inlet valve and seat having my guard-bolts applied thereto, and representing the valve in a closed position. Fig. 2 represents a similar view, showing the valve in an open position; and Fig. 3 represents a face view of the seat and a transverse section through the valve-stem and socket or sleev forming a guide therefor.

Similar letters of reference designate cor responding parts in all the figures.

A designates a disk-like valve-seat, here shown as movable and adapted to be screwed into the cylinder-head, although it might be a fixed seat, and A designates a socket or sleeve forming a guide for the stem B, to which the valve 0 is attached. The valve-seat is constructed with the usual ways or openings, at, and the valve is held in place by a nut, D, fitted to the end of the stem, and forming a stop to the outward movement of the valve, as shown in Fig. 2, by striking against the end of the guide A.

E designates the spring for holding the valve against its seat.

All these parts are of common construction, and therefore no further description thereof is necessary.

It is obvious that it the stem B should break or the stop-n utD become unscrewed the valve itself would drop down into the cylinder, where it would jam between the piston and cylinderhead and cause breakage.

To prevent the valve from so dropping down when it becomes detached, I provide one or more guard-bolts, F, of which two are shown in the drawings having shoulders I), here formed by the heads of the bolts, but which might be formed by a collar or nut, the bolts being studbolts instead of tap-bolts, as here represented. These bolts are inserted through holes in the seat A, in which they are fitted so loosely as to move easily longitudinally therein, and are tightly screwed into screw-threaded holes 0 in the valve 0. In order to enable them to be very tightly secured, I preferably make taper screw-threads upon the bolts and in the holes 0, as clearly shown in Fig. 2.

To provide for readily attaching the guardbolts to the ordinary valves, the bolts are preferably inserted through the ways or openings to in the valve-seat, in which case all that is necessary to apply them is to provide the valve with screw-threaded holes 0 for their reception and make the heads of the bolts larger than the ways or openings.

When the valve is fully open, as shown in Fig. 2, it will be observed that the shoulders upon the guard-bolts do not strike the seat, and that therefore an opening is left for the passage of air around the bolts.

It will be observed that the guard-bolts F, which, as before stated, are rigidly attached to orfixed in the valve, have no other connection whatever with the valve or seat, and hence may be applied thereto with little expense.

By my invention I provide in a simple manner for preventing the dropping of the valves when they become detached from their seats, and my invention can be readily and quickly applied to valves of air-compressors now in use, as well as new ones.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination, with the disklike valveseat A and the valve (3, of one or more guardbolts, F, rigidly attached to the valve andwork- [0 ing through the seat, but havingno other connection with the valve or seat, and provided With shoulders I), all substantially as and for the purpose specified.

JAMES CLAYTON. Witnesses FREDK. HAYNES, THOMAS E. BIRCH.

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