US398557A - Safety-valve - Google Patents

Description

(No Model.)

F. X. VIEN.

SAFETY VALVE.

No. 398,557. Patented Feb. 26, 1889.

IIVVENTOR:

ATTORNEYS;

UNITED STATES PATENT OFFICE.

FRANCIS XAVIER VIEN, OF BROOKLYN, NEW YORK.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 398,557, dated February26, 1889.

Application filed November 8, 1888. Serial No. 290,28d (No model.)

To CLZZ whom, it may concern:

Be it known that I, FRANCIS XAVIER VIEN, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Safety-Valve, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved safety-valve which is simple and durable in construction and very effective in operation, moving in a straight line when pressure is applied.

The invention consists of a valve mounted to slide vertically, a pin bearing in the center of the valve, and a weighted lever pressing on the said pin.

The invention also consists of certain parts and details and combinations of the same, as will be hereinafter fully described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar letters of reference indicate i corresponding parts in both the figures.

Figure l is a plan view of the improvement with parts in section, and Fig. 2 is a sectional 1 side elevation of the same.

The improved safety-valve A is provided with the usual valve -body, B, in which is formed the valve-scat C, on the top of which is held the valve-disk D, provided on its under side with down *ardly-extemlin g projections E, fitting loosely in the opening of the alveseat, so as to guide the val ve-disk l) vertically when pressure is applied.

On top of thedisk D,in the center, is formed a cavit ll. in which rests the lower rounded .V,

end, ;r, of a pin, G, extending vertically and provided at its upper end with a point, G resting in a cone-shaped opening formed in the lower end of a set-screw, II, screwing in the valve-lever l, and secured in place in the said lever by a jam-nut, J.

The lever I fulcrumed on the pointed ends of the screws K and K, screwing in lugs L,

formed on the top of the cover N of the valvef hodyB. The pivotal center of the levcrI is in horizontal line with the upper end of the pin G when the valve-disk D is closed, as is plainly shown in Fig. 2. For this purpose the lever I has a recess, 1, directly below the screw H, so

l as to permit a free entrance of the upper end of the pin G. On the lever I is hung the usual weight, 0. On suitable standards formed on the cover X is secured a pin, P, held above the lever T to prevent the latter from swinging too far upwardly.

The operation is as follows: lVh en the steam passing through the valve-body B exceeds the normal pressure to which the weight 0 is set, then the steam forces the disk D upward off of its seat 0, whereby the steam can pass from the compartment B to the compartment- 13 in the valve body or casing B and out into the open air. This upward movement of the valve D lifts the pin G, which, by its pointed end G pressing against the screw H, raises the lever I. The lugs E on the disk-valve D guide the latter in its vertical movement, and when the pressure in the compartment B is reduced to the normal pressure the weighted i lever I forces the valve D downward again on its seat (3. Thus it will be seen that the movement of the valve I) is always vertical whether up or down, so that very little friction is produced and the valve becomes very sensitive. It will further be seen that the friction is still more reduced on account of the pin G being loosely connected with the valve D and the lover I. As the latter is hung on points, as shown in Fig. 1, the friction of the lever in swinging is also reduced to a minimum. It is understood that the valve D moves straight up and down, as the upper end of the pin G is in horizontal line with the pivot-point ot' the lover. The pin G passes loosely through an enlarged opening in the cover N, so that said pin forms contacts only at the top and 3 bottom, as before described. It will further be seen that the lever I can be placed in any direction after the valve-body secured in place-by turning the cover N accordingly and then fastening it to the valve-body.

IIavin g thus fully described my invention, 1 I claim as new and desire to secure by Letters Patent 1. In a safety-valve, the combination, with 1 a weighted lever hung 011 pointed screws, of a set-screw screwing in the said lever, a pin provided with a point at its upper end engaging the under side of the said set-screw, and

a valve-disk mounted to slide vertically and gaging the upper pointed end of the said pin,

in the center of which rests the lower end of a lever in which screws said set-screw, and

the said pin, substantially as shown and descrews having pointed ends forming the pivot scribed. for the said lever, said screws screwing in lugs I 5 2. In a safety-valve, the combination, with on the said cover, substantially as shown and a valve-body provided with a valve-seat and a described.

cover secured 011 the said valve-body, of a valve provided with downward proj eetions for E F. XAVIER VIEN. guiding itin its seat, a pin resting at its lower I Witnesses:

end in the center of the said valve and passing THEO. G. HOSTER,

loosely through said cover, a set-screw en- C. S/EDGVVICK.

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