US550485A - Steam-tank valve - Google Patents

Description

2 Sheets Sheet 1.

(No Model.)

N. 0URTIS-. STEAM TANK VALVE.

Patented Nov. 26, 1895. E51;

0 lial/555 N 2515155 Z Wi'TEEESEE ANDREW RGRAHAM. PHOYQLITNQWASHINFIUN, DC.

2 Sheets-Sheet 2.

(No Model.)

N. CURTIS. STEAM TANK VALVE.

No; 550,485 Patented Nov. 26, 1895. V

Ill,

UNITED STATES PATENT OFFICE.

NELSON CURTIS, OF BOSTON, MASSACHUSETTS.

STEAM-TAN K VALVE.

SPECIFICATION forming part of Letters Patent No. 550,485, dated November 26, 1895.

Application filed June 17, 1892. Serial No. 437,022. (No model.)

' or discharge passage-way, a movable caphead opposite said inlet passage-way, and a tubular valve fitting the interior of said valvebody between the said inlet and outlet passage-ways with a close fit, the said float-stem being secured to the valve and the said movable cap-head serving as the seat for the same.

The invention consists further in details of construction, more particularly in centering the float-stem within the tubular valve and making a connection between said devices.

In the drawings, Figure 1 is a vertical section of a steam-trap embodying my said invention. Fig. 2 is a vertical section, upon an enlarged scale, of the valve-body and valve shown at Fig. 1. Figs. 3 and 4 are modifications of the valve-body and valve, as hereinafter more fully stated.

Except when otherwise stated, this description refers more particularly to the valvebody, valve, and tank shown at Figs. 1 and 2. So far as may be, however, the same letters represent corresponding parts in all the figures; but in Figs. 3 and 4 numerals corresponding to said figures are added to the letters appropriated to the said parts.

T is the steam-tank. F is the float. A is the valve-body. V is the valve, being essentially a tube movable longitudinally in said valve-body, its outer periphery closely fitting the inner periphery of said valve-body, as shown. The said valve V, near its end the more remote from the steam-tank, has an inward projection or cross-bar 19, provided with a hole 71, central to the said tube or valve V. R is the float-stem connecting the said valve with the float F, directly or indirectly, according to the location of the valve-body on the tank. In the position shown at Fig. 1, where, as hereinafter described, the valve works horizontally, the float-stem R is in two parts, the part lying within'the tank being a pivoted bellcrank lever, the long arm of which is attached to the float.

The end of the float-stem R within the valvebody is secured to the projection 19 within the valve by a shouldered bolt B, passing through the hole h in said projection and screwing into the stem. The said inner end of the float-stem R is furnished with a feather or feathers f to approximately center the rod in the tube or valve, and the said feathers are beveled, as shown, so that when the valve is slid into the valve-body the valve-stem readily enters the interior of the valve.

0 is a cap serving as the head for the outer end of the valve-body and also as a seat for the valve. By unscrewing the cap-head C and the bolt 13 the seat, as well as the valve, may be removed for examination and grinding or repairs. The valve-body A is provided with a pipe connection P, opening into an enlarged chamber 0 near the outer end of the valvebody. This pipe connection P furnishes the outlet 0 of the valve-body. The inlet t' is at the junction of the valve-body with the tank.

H is an ordinary pass-by valve.

In the position shown, Figs. 1 and 2, the valve V is on its seat, and communication be tween the tank and enlarged chamber 0 and pipe connection P or outlet 0 is closed. When the float F rises, the valve V will be pulled back from its seat on cap 0 and communication will be opened from tank through inlet c', the interior of the valve V, and enlarged chamber 0 to outlet P.

In the modification shown at Fig. 3, A is the valve-body, V the valve, 19 the inward projection, R the float-stem, &c., as above stated; but the outlet to the enlarged chamber 0 instead of being through a pipe c011- nection, is through a perforation o in the caphead 0 and accordingly the valve-seat, instead of being upon the cap-head, is at the other end of the valve V uponaspider-plate or a solid abutment D, near the inlet '6 of the valve-body, through which, however, the float-stemRworks with asteam-tight fit. As

shown, the valve V is supposed to work per- IOO nection P and the valve V may be seated at either endthat is, upon the cap-head O or upon the spider-plate or abutment D near the inlet end of the valve-body.

I claim 1. The combination with the steam-tank T, float F, float-stem R, valve-body A provided with outlet passageway 0, inlet passagewayz' opening out of said tank and movable cap C, of tubular valve V, provided with inward projection 17, and bolt B, screwing into said float-stem through, said projection, the said tubular valve having its seat against said cap-head, substantially as described.

2. The combination with the steam-tank T, float F, float-stem R provided With beveled feather or feathers f and valve-body A, of tubular valve V provided with inward projection 1) having central hole h, and the bolt B, substantially as described.

NELSON CURTIS. lVitnesses XV. W. SWAN, WM. S. ROGERS.

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