US489464A - crosby - Google Patents

Description

(No Model.) I 3 SheetsSheet 1. J. H. CROSBY.

v ELECTED STEAM VALVE ATTACHMENT. No. 489,464. Patented Jan. 10, 189 3.

(No Model.) a Sheets- Sheet 2. J. H-. CROSBY ELEGTRO STEAM VALVE ATTACHMENT.

N0. 489,464. Patented Jan. 10, 1893.

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J., H. CROSBY. v ELEGTRO STEAM VALVE ATTACHMENT. No. 489,464..v

3 Sheets-Sheet 3.

Patenked Jan. 10, 1893.

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a I I a l D UNtTnn STATES PATENT @rrroe.

JAMES H. CROSBY, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO THE GAMEWELL FIRE ALARM TELEGRAPH COMPANY, OF NEW YORK, N. Y.

ELECTRO-STEAM-VALVE ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 489,464, dated. January 10, 1893.

Application filed September 1, 1890- Serial No. 363,632. (No model.)

To all whom it may concern: erted to open the main valve, acts to reset the Be it known that I, JAMES HORACE CROSBY, spring and also to reset the detent. of Somerville, in the county of Middlesex and In the drawings A is the main Valve, which State of Massachusetts, have invented an Imis normally kept upon its seat a by the press- 5 provement in Electro-Steam-Valve Attachure of the steam, aided by the light spring a;

ments,of which the followingisaspecification, but when the valve A is raised from its seat reference being had to the accompanying the steam or other fluid passes by it, and drawings, in which sounds a whistle, or does other duty as may Figure 1 is a plan showing one form of valve be desired. The main valve A is controlled 10 and of mechanism for opening the valve and by the piston B, and this piston is actuated by keeping it open for a definite length of time. the steam or other fluid which escapes past Fig. 2 is a central longitudinal section of the the auxiliary valve D, so that when the valve parts shown in Fig. 1. Fig. 3 is a section on D is off its seat d far enough to clear the exline 33 of Fig 2; Fig. 4 is a perspective view haust d pressure accumulates under piston B 15 of certain parts broken away from the rest of forcing it forward and opening valve A; but the attachment. Fig. 5 is an elevation, and valve D is then left free to close and closes Fig. 6 aplan view of one form of electrical apgradually as the air escapes from cylinder F, paratus for relieving a detent which controls and as soon as valve D is closed the steam esa spring, or the like, for setting the valve capes from cylinderb through exhaust d, and 2o mechanism in operation. Fig. 7 is a partial piston Band valveA make theirback strokes. side elevation, partly in section; Fig. 8 an end Valve D is connected by its stem to piston elevation; and Fig. 9 a section on line 99 of f, so that spring (Z is compressed when valve Fig. 6. A D is opened and pistonf moved to the right The object of my invention is to control a in Fig. 2, and spring d draws valve D back 25 steam or other valve by means of an auxto its seat, and piston f to the left. The first iliary valve, which is opened by a spring motion of valve D from its seat at, and of pisor other source of power, when a detent contonfin cylinder F, is given by the lever G, trolling that spring is released by making, or which is connected by the rods g with the colbreaking, a circuit; and one feature of my inlar g which slides on stem 01 of valve D, and 3o vention consists in a novel combination of the sticks collar g fast to stem (1 thereby openmain and auxiliary valves by which the opening valve D slightly. But the motion of lever ing of the main valve insures the proper open- G also swings levers 9 over the ears 1 on c'oling of the auxiliary valve. lar g lever G being connected with levers g A second feature of my invention is the by the rod g and lovers 9 rising slightly 35 combination of the auxiliary valve with a regagainst spring g as the ears in collar g pass ulating piston so that the time during which under the lower ends 0" of levers g and those the auxiliary valve remains open is deterends of levers g pass over those ears; for the mined by the escape of air from a cylinder. motion of collar g toward the rightin Fig. 2

A third feature of my invention consists in takes place while the lower ends of levers g 40 an electrical apparatus comprising a detent, swing toward the left, both motions being and a spring, or its equivalent, which is precaused by the lever G. In this waythe lower vented from operating so long as the detent ends of levers g are brought on the left of is set, but which is put under strain automatithe ears on collar 9 instead of on the right cally by the operation of the main valve,thereas shown in Fig. 2. This slight opening of 5 5 by resetting the detent; that is the detent is the valve D closes exhaust d and also admits released by making a circuit, (or in the case steamto cylinder b; forcing piston B forward of a closed circuit apparatus by breaking a and opening valve A wide. But the collar 19 circuit) and the release of that detent allows fast to stem 19 strikes the third arm 3 of lever the spring or other source of power to act to G and'moves that lever on its fulcrum; the 10: 50 open the auxiliary valve, and thereby set in result of this return motion of lever G, is to motion the main valve, and the power exswing the lower ends of levers g to the right these levers carrying with them the collar g and insuring the proper opening of the valve D. As soon as the levers 9 have been moving far enough to the right the cross bar gr engages with cam 9 thus moving levers 9 against spring and freeing the ears on collar g from levers 9 which allows valve D and piston f to move toward the left in Fig. 2. This motion of valve D is retarded by the pistonfiand the time occupied depends upon the adjustment of the vent screwf. The levers g remain with their cross bar 9 resting upon the flat upper surface of cam g while the valve A is open and the valve D returning to its seat; but as the valve A and piston 13 make their return stroke the spring collar b engaging the third arm of lever G brings it into the position shown in Fig. 2, ready for the next operation.

The lever G is connected by the rod with the lever H of the apparatus which is set in motion by making, or breaking, a circuit through the magnet M. This magnet, its armature m, the detents m m m and springs m m are of a familiar construction, too well known to need description and are arranged in the well known way, and so that when the armature is moved the detent m is released allowing lever m" to be pulled down by spring m This motion of lever on lifts latch h, by reason of pin it riding under latch h, and the lower end of the depending arm 4 of lever m strikes the toggle 7L2 h causing it to yield sufficiently to allow spring 7L to depress lever H, and thereby also pull down lever G, which operates the valves as above described. The spring 765 on lever II comes into contact with the weight or lever m and returns that lever to the position shown in Fig. 5, when it is caught and held in the usual way. But the motion of piston B,and valve A, operates the lever G, as above described, and the upward motion of the long arm of lever G pulls lever H up with it against the force of the spring h, and this upward motion of lever l-I straightens toggle 7L2 7L3 which is caught by latch h, so that all the parts are brought back to the po sition shown in Fig. 5.

In operation the armature m is moved, by making or breaking the circuit, releasing detent m, and allowing lever m to be pulled down by spring m this motion of lever m unlatches the toggle 7L2 7L3 and moves its middle joint past the center, so that spring it pulls down lever H, and with it lever G. This motion of lever G, opens valve D slightly, and connects the stem of valve D with the stem of piston 15, (by means of levers g and collar 9 as above described.) But the opening of valve D causes piston B to make its forward stroke, carrying with it valve A, and also valve D until the levers g are disengaged from collar g and the forward stroke of piston 13 causes collar 11 to move lever G in the same direction, carrying with it lever H, and straightening and latching toggle 71. h". As soon as armature m is moved the lever m swings rapidly down under force of spring m and the levers H and G are also pulled rapidly down by spring 7L the downward motion of lever ll causing lever m to swing back to place where it is held by detent m. The piston 13 almost instantly movesforward, and the collar 11 strikes lever G and restores both levers G and II to place. Then valve D, having been released from levers 9, begins to close, and closes in one, two or more seconds according to the adjustment of vent f. The steam or other fluid escapes past valve A, as long as valve D is open, sounding a whistle or doing other duty; but as soon as valve D closes, cylinder 12 is freed from pressure by exhaust d, and piston B makes its back stroke, valve A seating itself. The collar 1) is always in spring contact with one arm of lever G.

The first feature of my invention, the connection of the main valve and auxiliary valves with a piston which opens both positively, and then allows the auxiliary valve to close, is applicableto other uses than these shown, but is especially advantageous in apparatus of the class shown where the detent controlled by the armature or its equivalent releases a spring or other source of power, and this spring opens an auxiliary valve, which sets a piston in motion, the motion of this piston resetting the releasing apparatus.

So far as I am aware I am the first to combine a main valve and piston with an auxiliary valve and a piston and cylinder and an adjustable vent to time the closing of the auxiliary valve, and this feature of my invention may obviously be used with a variety of apparatuses for opening the auxiliary valve.

hat I claim as my invent-ion is:

1. In combination the main valve its piston, cylinder and stem, with the auxiliary valve, and its stem, and mechanism, consisting of the levers g collar 9 and cam g connecting the two stems for a portion of the forward stroke of the piston; all substantially as and for the purpose specified.

2. In combination the main valve its piston, cylinder, and stem; the auxiliary valve and its stem; and a spring controlled detent apparatus; with a lever which is pulled in one direction by the detent apparatus to open the auxiliary valve, and pulled in the other direction to reset the detent apparatus by the motion of the piston of the main valve.

JAMES H. CROSBY.

Witnesses:

EDWARD S. BEACH, LAURITZ N. MoLLER.

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