US58496A - Safety-valves in water-backs for ranges - Google Patents

Description

UNITED STATES PATENT OEEToE,

T. S. SPEAKMAN, OF PHILADELPHIA, PENNSYLVANIA.

SAFETY-VALVES IN WATER-BACKS FOR RANGES.

Specification forming part of Letters Patent No. 58,1196, dated October 2, 1866.

To all whom it may concern:

Be it known that I, T. S. SPEAKMAN, of Camden, New Jersey, have invented an Improvement in Water-Backs for Ranges, ,850., and I do hereby declare the following to be a full, clear, and exact description of the same, reference beinghad to the accom pan ying drawings, and to the Letters of reference marked thereon.

My invention consists of a water-back to which a valve is applied, substantially as described hereinafter, so that should the supplypipe become obstructed the valve will rise and allow the water or steam to escape from the water-back before the pressure within thelatter or in the hot-water reservoir becomes so great as t'o rupture the same.

1n order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawings,

' which form a part of this specification, Figure l is a front elevation, partly in section, of the water-back of'a range with my improvement, and Fig. 2 an end View, looking in the direction of the arrow, Fig. 1.

A is an oblong cast-iron box or case, ivhicl is similar to any of the usual water-backs ot' cookingranges, and with this case communicate two pipes, a and a', the former admitting cold water to the case, and the latter communicating with the reservoir into which t-he heated water flows.

At one end of the case is a chamber, X, with which communicates a pipe, b, and to an opening whichforms a communication between as to rupture either the reservoir or the wa.

ter-back, the explosions resulting from this cause sometimes being attended with loss of `lite and much damage to property.

In the improved water-back above described the valve B yields when the pressure within the case becomes excessive, and permits the water or steam to escape into the chamber X, from which it is conducted by the pipe b into any suitable receptacle.

The degree of pressure at which the valve B shall yield can be regulated by meansof the screw-cap G, by turning which the spring c can 'be compressed to any desired extent.

I claim as my invention and desire to sccure by Letters Patent- The combination, substantially as described, of the valve B with a waterback, A, forthc purpose specified.

In testimony whereof I have signed myname to this specifica-tion in the presence of two subscribing witnesses.

THOMAS S. SPEAKMAN.

Witnesses z CHARLES E. FOSTER, JOHN WHITE.

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