US155811A - Improvement in valves for steam, water - Google Patents

Description

UNITED STATES PATENT OFFICE.

SAMUEL J. AND MELVILLE C. POLAND, OF BOSTON, MASSACHUSETTS, ASSIGNORS TO SAMUEL J FEET, OF SAME PLACE.

IMPROVEMENT IN VALVES FOR STEAM, WATER, &c.

VSpecification forming part of Letters Patent No. 155,811, dated October 13, 1874; application tiled March 2,1874.

To all .whom t may concer/n:

Be it knownV that we, SAMUEL J. PEET and MELVILLE C. POLAND, ot' Boston, in the county of Suifolk and State of Massachusetts, have invented certain new and useful Improvements in Valves for Steam, Water, Ste.; and do hereby declare the same to he fully described in the following specification, and represented in the accompanying drawing.

In the said drawing, Figure l is a vertical, central, and longitudinal section of a valve constructed in accordance with our invention. Fig. 2 is a vertical and longitudinal section of the valve-case, taken so as to exhibit one pair of its vertical ribs. Fig. 3 is a side view of the false bonnet. Fig. 4 is al View of the in-4 ner face of one of the duplex valve plates or disks. Fig. 5 a similar view of its fellow plate or disk. Fig. 6 is an endelevation of the duplex valvedisks.

Our invention has reference to that class of valves, in which two independent disks or valve-plates are employed to close upon two opposite valve-seats disposed upon the inner ends of the induction and eduction ports of the duid-passage; and our invention consists in the novel construction and arrangement of the parts of the valve with each other, as'

herein described, whereby sundry defects, incident to valves as ordinarily constructed, are avoided, and a durable, easily-operated, and effective valve produced.

In the drawing, A denotes thebody or case of the valve, through which a straight unobstructed passage for the flowage ofsteam, water, dac., is made. B is the valve-stem,

which is provided at its upper end with a.

hand-wheel, C, and at its lower end has a male screw formed thereon. The said stem extends down through a stuffing box or cap, b, and a screw-conl'iection, c, which screws at its upper end into the packing-cap b, and serves to compact the stuffing therein, its lower end screwing onto the neck of `what I term the false bonnet l). The said stem has an annular shoulder, d, formed thereon, such shoulder entering a chamber of corresponding size formed in the neck f of the false bonnet, the said shoulder, and, of course, the spindle, being kept from vertical movement their limit of descent, is obviated.

by such chamber and the connector c, which impinges on the upper surface of the shoulder, or a washer resting thereon, the same being as shown in Fig. l. The false bonnet is of a dome shape having` a flange, g, extending around its lower edge, its base resting uponV an annular shoulder formed on the neck of the valve-case. On the internal surface of said neck are disposed a series of ears or lugs, h h, dto., which correspond in length with a series of openings, fit', made in the ilanged base of the bonnet, the same allowing the ears to be passed through the same and the bonnet to be located upon its seat, when, by slightly moving the bonnet horizontally, the hanged parts thereof will be caused to impin ge against the under surface of the lugs, and thus hold the bonnet in position. E is the cap or bonnet proper, the same being arranged upon the neck of the false bonnet, and resting upon the upper end of the valve-case, and being conined in place thereon by the screw-connector c, hereinbefore mentioned. F F are two valve plates or disks, the outer faces of which are formed divergent or with a downward taper, such taper corresponding with the taper or divergence of the seats Ich of the valve-ports.

,or pivotal action of the disks, suoli as takes place when but a single wedge is employed to operate the disks. The disk F has also two lugs or shoulders, m m, upon which the bases of the wedges of its fellow disk rest, such serving to connect the two disks, and locating the disk F on a plane a little lower than that of the disk F, by which arrangement the former disk by its gravity is caused to descend a little in advance of its fellow,-whereby any setting of the disks, before they have reached Furthermore each of the disks is provided on its opposite vertical faces with grooves n n made parallel to the inner faces of the disks. These grooves `receive the vertical parallel ribs o o' o o', which are disposed on opposite sides of the valve-case, such ribs extending from the top of the valve-chamber down until they lose themselves in the perimeter of the chamber, such being as shown in Fig. 2, in which one pair of the ribs is shown.

By thus forming the seats ofthe valve and the faces of the disks with corresponding angles of divergence, and making the ribs on the sides of the shell or case, and the grooves of the disks vertical and parallel with their inner faces, the disks, on being either raised from or closed on their seats, are thus guided and held out of contact therewith during their entire range of upward and downward movement, thereby preventing all the friction and wear incident to valves, which, while being thus operated, impinge and slide upon the faces of their seats.

By thus forming the valve with the false bonnet, the screw-connector c, and the cap or bonnet proper, as described, we are enabled to dispense with the large screw-threads usually formed on the bonnet and the perimeter of the valve-ease, such latter construction being especially objectionable in large valves, as when such become set or rusty, it is almost impossible to disconnect them Without injury or damagin g either the bonnet or its case.

provided with divergent valve-seats and with i parallel ribs, located on the shell, as described, the inclined disksiy Ff, having duplex wedges andparallel grooves formed thereon, as stated, the Whole being arranged and provided with mechanism for` operating the disks, substantially as set forth.

2. The disks F Ff, formed with duplex Wedges, disposed thereon in manner and for the purpose set forth.

3. The combination, with the case A, and its cap or bonnet E, of the false bonnet D, and the screw-connector c, as and for the purpose set forth.

SAMUEL J. PEET.

MELVILLE C. POLAND.

Witnesses:

F. P. HALE, F. @.HALE.

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