US72361A - Improvement in combined low-wateb indicator and safety-valves - Google Patents

Description

Chrles Barley.

Low-water Indicator and Safety Valve PATENTED DEC 17 I867 Inventor gotten giants fitment @ffirr.

CHARLES BURLEY, OF CINCINNATI, OHIO.

Letters Patent No. 72,361, dated December 17, 1867. I

IMPROVEMENT IN COMBINED LOW-WATER INDICATOR AND SAFETYWALVES.

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TO WHOM IT MAY CONCERN: I

Be, it known that I, CHARLES Bonner, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Low-Water Indicator and Safety-Valve; and do hereby declare the following to be a full, clear,,and exact description thereof, reference being had to the accompanying" drawing, making part of this specification.

This invention relates to an attachment to an ordinary steam-boiler, for the purpose of giving warning whether of excessive pressure or of a deficiency of water in the boiler. v

The accompanying drawing is an axial section through. my indicator.

A represents a boiler or steam-generator. B is a dome or' chamber, secured to the top of the boiler, and communicating with the steam-space thereof. The top of this dome has an orifice, b, to receive a tube, C, which depends perpendicularly into the boiler, with its lower end reaching below thetop of the water when a proper supplyof the latter is in the boiler. This tube, at its upper end, has a horizontal bend, C, whose upturned extremity enters a. globe, D, furnished with a small snifting-cock, E. The tube 0 has a collar, C", which, resting on the top of the dome, performs-the function of a valve, and serves to close the steam-space. Project-- ing from the tube 0 C, in an opposite direction to the bend C, is a bar, F, hinged or fulcrumed by pivot-bolt G-to a screw-shanked crotch H, which is attached to' and adjustable in a lug, I, that projects-horizontally from the outside of the dome B. The bar F- has a. series of holes to receive a bolt,*J, by which aweight, K, is

attached to the bar at such distance from the fulcrum as to partially neutralize the weight ofthe-full globe and pipe, and enable steam to lift the valve C" at'anydcsiredmaxiinum pressure. The upward stroke of the tube C C is restricted by a yoke, L, whose screw-threaded shank is secured to and adjustable vertically in a lug, M, i

which projects from the dome. The shanks of the crotch H and yoke L are secured to their proper vertical adjustment bynieans of nuts h It Z l, and these nuts enable the accurate adjustment of the valve so as to sit squarely on its seat. l The operation is as follows: So long as the water i'iSuS above the lower end of the tube C C, the entire tube and globe are necessarily full of water, and, in this condition, are of-suflicicntweight to hold the valve C 7 down firmly on its seat, but the moment that thewater gets below the bottom of the tube, the latter is relieved,

of its liquid contents, and, flying upward by the'combined agency of the steam-pressure and the counterbalance, permits the escape of steam in such volumes as, by both sight and sound, to give unmistakable warning of the depleted condition of the boiler. This indication is readily distinguished from the less protracted and copious discharges incident to excess of pressure.

I claim herein as new, and of my invention- 1. The safety-valve C, affixed to a gravitating-pipe, C C, which communicates with the water-spacaand is provided with a graduating-lever, 'F, in the manner and for the purpose set forth.

2. The arrangement of bent tube C C, and valve C, globe D, bar F, and adjustable weights K, substantially as herein set forth.

In testimony of which invention, I hereunto set my hand.

a CHARLES BURLEY. Witnesses: Geo. H. KNIGHT,

J AMES H. LAYMAN.

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