US325928A - Automatic safety - Google Patents

Description

(No Model.)

' J. H. J. HAINES & .J. P. STRONG.

AUTOMATIG'SAFHTY GAS BURNER. v No.. 325,923. Patented Sept; 8, 1885 5 5 UNITED STATES PATENT OFFIC JOHN H. J. HAINES AND JAMES F. STRONG, OF FLUSHING, NEW YORK.

AUTOMATIC SAFETY GAS-BURNER.

EJPECIl -ICATION forming part of Letters Patent No. 325,928, dated September 8, 1885. Application filed September 12, 1884. (No model.)

To all whom, it may concern.-

Be it known that we, JOHN H. J. HAINES and JAMES F. STRONG, both of Flushing, in the county of Queens and State of New York, have invented certain new and useful Improvements in Automatic Safety Gas-Burners, of which the following is a specification. Our invention relates to improvements in gas-burners, whereby the escape of gas is automatically, stopped if the flame is extinguished.

In the drawings, Figure l is a vertical sectional view of our invention. Fig. 2 is a vertical sectional View taken at right angles to the section shown in Fig. 1. Fig. 3 is a cross-sectional view of the automatic cut-off valve and expanding spring. Fig. 4 is a detail view of the compound lips on the end of the expanding-spring. Fig. 5 shows a modification of the end of theexpanding spring and compound lips.

Similar letters of reference designate similar parts in all the drawings.

A is a rotary valve in the gas-pipe B,having rigidly attached to it the jointed arm D.

E is our automatic revolving cutoff valve,

having the arms F G rigidly attached to one end of its axle, and being turned by the coiled spring H, one end of which is fastened to the valve and the other end to the body of the gas-pipe, and which spring-H causes the'valve to revolve when released from the expanding spring I, ashereinafter set forth.

J J are wings fice or nipple K, one on each side, in such a manner that Whichever way the flame of the gasjet may burn,whether evenly or irregularly,under the influence of drafts, &c. one or both of these wings will become heated by theflame, and in turn communicate this heat to the ring L, by which they are held in position and to which is firmly fastened the expanding spring. These wings may be made of a single piece of flat sheet metal, struck out with an aperture in the center for the nipple to rise through, and then bent into the required form and riveted or otherwise fastened to the ring L; but

We do not confine ourselves to this specific form, and it is practicable to dispense with these wings, as the nipple will ordinarily be so heated by the flame as to communicate suffispring I to operate it.

cient heat to the used with projecting around the gas ori-' The springI is composed of strips of two metals, which expand unequally underthe application of heat, which strips are firmly sweated together, the metal which has the greatest expansion being placed upon the out side of the coil, so'that when spring becomes heated from the ring L, it will lengthen in the direction of its coil and its lower end will move forward and downward.

There are several advantages in using a spiral spring, I, rather than a straight or irregularly-bent spring, as has-heretofore been done. In the spiral form a much greater length of spring may be conveniently used, and consequently agreater play of the end of the spring will be obtained. The spiralspring also will expand and contract uniformly and evenly in the direction of its coil, while a straight or irregularly-bent springis liableto expand and contract irregularly and to warp andtwist out of shape, and to fail in performing its functions with exactness and regularity. The spring will remain expanded as long as it is heated by the burning gas-jet, and when the flame becomes extinguished and the spring 'cools it will contract and shorten.

Many metals may be used for forming this spring I. For instance, brass, copper, zinc, silver, and gold have each a greater expansibility than steel, and any one of them may be steel to form the spring,the springs so formed having various degrees of expansibility. For instance, a spring about three inches in length,formed of brass and steel,will expand about three thirty-seconds of an inch under aheat of 212 to 250, which can readily be obtained from an ordinary gasjet by means of the wings J J.

P is ajacket or case surrounding the parts to protect them from injury.

The operation of our invention is as follows: When the gas jet is 'extinguished and the expanding spring is coldand contracted,its end will be in the position shown by thesolid lines in Fig. 3, and the rotary valve F Will be closed' by the spring H, and turned so that the arm G willrest against the pin M in the position shown by the dotted lines, Fig. 2. If the valve A is then opened by being turned from right to left, the arm D will pass from the position shown by the dotted lines, Fig. 2, to the posithe expanding rco tion shown by the full lines, its end engaging with the end of thearm F, and carrying the arm F from the position shown by the dotted lines to that shown by the full lines, Fig. 2, turning the valve E so as to open it and depressing the arm G so that its end will descend past the inclined edge of thelip N on-the end of the spring I, forcing the spring outward by earn motion until the end of the arm G has passed beneath the lip N, when the lip N will spring back and prevent the arm G from again rising, as shown by the solid lines in Fig. 2. The hinge in the arm D will allow it to double and repass the arm F,if the valve A is turned, without changing the position of the valve E. The parts being in the positions described, the valves will be open,-so that the gas will escape and may be lighted. When lighted, the heat will expand the spring I so that it will lengthen, as shown by the dotted lines, Fig. 3, and the lips N will slide past the arm G, which will still be held down by the lip 0, so as to keep the valve E open. Should the flame by any means be extinguished,the spring I will rapidly cool and contract, the lip 0 will slide back from above the arm G, allowing the arm G to escape laterally through the opening between the lips O and N, when the valve E will be at once closed by thespring H andthe gas shut off. 7

WVe thus secure an automatic gas-burner which will remain open so long as the gas continues to burn, but which will at once close and shut off the flow of gas if the flame is extinguished.

Other styles of valves may be used instead of the valve E,and we do not confine ourselves to the specific form shown, nor to the specific devices for utilizing the expansibility and contraction or expansibility or contraction of an expansive spiral spring composed of brass and steel, or their equivalents, for cutting off the flow of gas when the flame is extinguished.

What we claim,and desire to secure by Letters Patent of the United States, is-

1. The combination, in a gas-burner, of the valve E, provided with the spring H and arm G, the spring I, composed of brass and steel, or their equivalents,provided with the lips N O, the ring L, and wings J J, substantially as and for the purposes set forth.

2. In a gas-burner, the combination of the valve A, provided with the arm D, the valve E, provided with the arms F G and spring H,

the spring I, composed of brass and steel, or their equivalents, and provided with the lips N O, the ring L, and wings J J, substantially as and for the purposes set forth.

3. The combination,in a gas-burner, of the valve E, provided with the spring H and arm G, and theexpansive spiral spring I, composed of brass and steel, or their equivalents, provided with the lips N O,and operated by heat derived from the gas-jet, for the purposes set forth.

4. In a gas-burner, the combination of the valve A, provided with the arm'D, the valve E, provided with the armsFG and spring H, and the expansive spiral spring I, composed of brass and steel, or their equivalents, and provided with the lips N O, and operated by heat derived from the gas-jet, for the purposes set forth.

JOHN H. J. HAI'NES. JAMES F. STRONG.

\Vitnesses:

CLINTON ARMSTRONG, A. WILsoN.

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