US107540A

US107540A - Improvement in safety-valves

Info

Publication number: US107540A
Authority: US
Publication date: 1870-09-20
Anticipated expiration: 1887-09-20

Description

WILLIAM R. REECE, OF TREMONT, PENNSYLVANIA, ASSIGNOR TO HIMSELF,

`WILLIAM(ir-ARRETE, AND MICHAEL MOLL, 0F SAME PLAGE.

were Patent No. 107,540, 1aed september 2o, 18m.

IMPROVEMENT .IN SAFETY-VALVES.

The Schedule referred to in these Letters Patent and making part of the same T0 all whom it 'hurry concern Be it known-that I, WILLIAM R. Runen, of Tremont, in the county of Schuylkill and State .otPclin- Sylvania, have invented a new and' useful Improvement in ASafety-Valves; and I do hereby decla-re that A the following is a full, clear, and exact description thereof, which will enable others sklled'in the art t0 make and use the same, reference being had tothe accompanying drawing forming part o f this specilication.

' This invention relates to improvement in that class of safety-valve alarm apparatus, for attachment to steam-boilers, in which a float, resting on the surface ofthe water within the boiler, is employed; and

The invention consists in the combination and arrangement of parts as' hereinafter described, and as particularly specified in the claim.

Figure l is a side elevation f a boiler having my improved appara-tus applied, a part of the shell of the boiler being 'broken out, to show the arrangement of" the float. v

Figure 2 is a transverse section ofso much of the boiler as is necessary to show the arrangement.

Similar letters oi' reference indicate corresponding parts.

A is the safety-valve lever, and

15, the stem ofthe valve. y

Ihese are arranged the same' as in the ordinaryway, 'except that it rests in the top of the two posts, A', and

the short arm of the lever is connected to a chain, 0,'

which is wound around a roller, D, which is held by la ratchet-wheel, E, and pawl F,against the action of the weight ofthe valve-lever, when holding the valve down to close it. ,l

It is designed to disengage this ratchet-wheel by theaction' of a float in the boiler falling` with theV water when it becomes low, and withdrawinga hellerank Acateln'l, which sustains a Weighted lever, G. By this movement, the leverG falls and strikes the pin' H in the pawl F, and disengages it from lthe ratchet-wheel. i

This weighted lever is held up in the position from which it is to be let fall bya bell-crank, I, which is pivotedto a suitable support, K, and so connected to rod L, rising up through the shell of the boiler, that the said bell-crank will be lowered bythe movement of the roll downward. M is a ioat, arranged on the .rod to rise and fall with the water, and when the water fails too low, to,- rest on the rod by means of the disk'N, or any other stop which will hold it, so that the weight ofthe oat will draw the bell-crank down, and thereby cause the weighted lever G to be disengaged from the stud O of the short arm of the bell-crank, and let fall to strike the pin H, and let the lever A freeto allow the steam to escape and relieve the boiler.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- 1. The safety-valve lever, attached to a shaft, D, which is tripped by a weighted (lever, let fall by the descent of a float iu the boiler, whereby the safetyvalve is set free, all substantially as specified.

2. lhe combination, with` the safety-valve lever, of the chain-roller, ratchet-wheel, pawl, and the weighted drop-roller, all substantially as specified.

3. The combinatlon,'\vith the weighted drop-leger, of vthe bell-crank I, rod L, and float M, allsuhstaw tially as specified.

`WILLIAM It. REEGE.

- Witnesses: I

GEO. W. GARRETT, AARON Ecxan.