USRE1441E - Improvement in traps for steam - Google Patents

Description

, bottom of the said bo conical or other form,in which there is an ori- UNITED STATES PATENT OFFICE.

THOMAS SAULT, JF SEYMOUR, CONNECTICUT.

IMPROVEMENT IN TRAPs Foa STEAM APPARATUS'.

Specilieation forming part of Letters, PatentNo. 27,313, dated February 28, 1F60; Reissue No. M441, datedA March 24, 1863.

To all whom, it 11i/ay concern:

Beitknown that I, THOMAS SAULT,of Seymour, in the county of New Havenand State of Connecticut, have invented a new and Improved Trap for Steam Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in

a steam radiator or heater, or to any other steam apparatus where a trap is required, as to provide by the agency of its vastly greater contraction and expansion `with changes of temperature, as compared with the material of which the b ox is made, either for the escape of any air4 or water that may have co1- lected within the steam-space before the admission of steam thereinto, or for the admission of air to prevent the collapse of the ap para tus by they-formation of a vacuum therein after the steam has been shut oi, in either case preventing the escape of steam To enable thoseV skilled in the art to make and use my invention, 1 will -proeeed to describe its construction and operation.-

The trap represented serves to provide for i the escape of air or water from a steam-coil or other radiator or heater. A' is the valvebox, consisting of a long cylinder of castiron or othermet-al, attached at its lower end to the steam pipe or radiator, or other steam heating apparatus, and provided at its npper end witha cap, B, which is screwed onto a screwthread,f, cut' onthe exterior. In the there is a seat, a, of

tice, b, which forms a communicationwith the steam space, and in the c'ap B there is another seat, c, in which there is an orifice, d,

V which forms a communication with the at- 4mosphere.l

C is the valve, consisting of a long cylinder or spindle-like piece of the substance known as vnlcanite-that is to say,'a hard vulcanized compound. of india-rubber or gattapers cha, or their allied gums-having its exterl' nal diameter smaller than the internal dia-lnel ter of the box A, and having its end formed to tit,A respectively, the two seats aand c. The i ripper end or face of the said valve is provided -with arseries of radial grooves, e.

The operation of this valve C is as follows: The cap B having beenso adjusted on the screwthreadfof the box, whilethe box and valve are V cold, as to leave a little longitudinal. play be tween the valve and the two seats a and c, f when steam has generated in the boiler and is i admitted into the steam-pipe, it drives the air i or water toward the valve C, and such air or water, having` only a small surface exposed to the steam', cannot be quickly heated thereby, and therefore cannot quickly heat and cause the expansion ot' the valve, but isfOrced bythe pressure of the steam against the valve i and caused to lift the latter, which is very light, from its seat c, and hold ,it against the f seat c, and hence the air or water is allowed L to pass through the orifice b, between the lower end or face' of the valve, up between the sides of the valve and box and through the grooves 'e e of the upper face -of the valve to the ori- 1 ce d, and thence to the atmosphere; but 5 whenall the air or water has been expelled L and steam enters the box, ythe valve becomes l'quickly heated, and notwithstanding that the box is heated also, the valve, Owing t0 the i greater expansive property ofthe substance much in length as to lit tightly between the and shutting'in the steam. When steam goes E down again, or is shut o', the valve contracts f lengthwise more than the box, and so prothe samemanner as before, when the steam is againadmitted. l

When it is desired to usethe trap to admit air to the interiorv of the radiator or other steam apparatus to prevent its collapse by the formation of a vacuum withinfit onthe .of the valve 'should be downward, so that when the valve is loose and only in contact of which it is composed, soon increases so' two seats c and c, thus closing the orifice b .vides for the expulsion of the air or water in condensation of the steam, the grooved end with its lower seat, c, air may pass the said seat to reach the orifice b." In such e case, when the valve is expanded by the lient of the steam, it closes tightly in the seat c; but in this construction of the valve the trap will only serve to admit air and not provide forits escape unless the valve be made heavy enough to'overcome the pressure o' the steam, when it would serve both purposes.

' The advantage possessed by this trap oonsists in the very highly expensive and controctile property developed in what is known as viileen'ite77 as compared with almost all other substances under changes of temperaf; ture.

The box A,instead of being 'n'iade of metal, i may be made of any other material which eX- pands and contracts under theiniinence of i changes of temperature in a snieiently less ratio than vulcanite. making the box of glass, which I believe `to be very suitable for the purpose.

What I claim as myinvention, and desire to secnreby Letters Patent, is

The employment in a trap for steam appa-- rains of a valve of vulcanite, applied to operete, substantiellyas described, between two opposite sea-ts in a box of metal or other ma terial whose expansibility by heat is less than that of the valve.

- THOMAS SAULT. Witnesses:` .l

n. W. Hmmm, W. B. S'ronnm).

I. have contemplated

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