US333215A - Paul h - Google Patents

Description

(No Model} P. H. GRIMM & W. I, FANCHER;

SAFETY ATTACHMENT FOR GAS BURNERS.

Patented Dec. 29, 1885.

- i fix VJ/nessay way Q I UNITED STATES PATENT 'O FricE.

PAUL H. GRIMM AND WARD I. FANOHER, OF GLEN COVE, NEW YORK.

SAFETY ATTACHMENT FOR GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 333,215, dated December 29, 1885.

Application filed September 5, 1884. Serial No. 142,339.

To aZZ whom it may concern.-

Be it known that we, PAUL H. GRIMM and WARD I. FANOHER, both of Glen Cove, in the county of Queens and State of New York, have invented a new and useful Improvement in Safety Attachments for Gas-Burners, of which the following is a specification.

Our invention is intended to automatically shut off the supply of gas to a burner when, through ignorance or carelessness, the gas is blown out without turning ofi the ordinary gascock; and it relates to that class of devices for the purpose above described which include an air-tight heater arranged to be heated by the flame from the burner in order to rarefy and produce expansion of its contained air or other fluid, and in which the pressure or expansive force of the air or fluid is utilized to control the closing of a valve, which is usually independent of the ordinary gas-cock.

The invention consists in novel combinations of parts hereinafter described,and pointed out in the claims.

In the accompanying drawings, Figure 1 represents a sectional elevation of our apparatus embodying our invention. Fig. 2 is a detail view, hereinafter described, illustrating a portion of the stem of the gas-supply valve and a device for opening the said supply-valve by hand when the burner is to be first lighted; and Fig. 3 is a sectional elevation of an apparatus of modified form, also embodying our invention.

Similar letters of reference designate corresponding parts in all the figures.

Referring first to Fig. 1, A designates the gassupply pipe, to which is attached a valvebox or small casting, B, from which extends the burner-tube O, surmounted by a burner, D. In the burner-tube O is the usual gascock, 0, to be turned by hand to shut off the supply of gas to the burner. In the valve boxor casting B is a valveseat, a; and b designates a valve adapted to close on the same and so shut off or cut off the supply of gas to the burner. The stem 1) of the valve is suitably guided through the seat by wings or ribs with which it is provided, andis also fitted to work through a guide, 0, at the end of the box (No model.)

or case B. The valve, when not otherwise actuated, is held to its seat a by a spring, d, here shown as bearing at one end against the valve and at the other end against a shoulder, d, in the box or case B.

At the end of the valve-box B is a motor, here shown as consisting of a flexible diaphragm, e, and a case, 6, inclosing the same. From the motor-case e a pipe, f, extends to a point above the burner D, and is there provided with a hollow ball or chamber, f, which is exposed to the heat of the flame fromthe burner. The confined body of air in the heater f and pipef is expanded by the heat, and the pressure thereby produced acts upon the diaphragm e to force it toward the right hand. The diaphragm bears against the end of the valve-stem b, and when moved by pressure of the confined and expanded air opens the valve b against the force of thespring d, and so holds it open as long as the gas burns. In case the flame is extinguished by blowing out, the confined air contracts as it cools, and, losing its force, allows the spring d to close the valve b. If desired, the spring might be dispensed with and the end of the valve-stem b secured fast to the diaphragm, as indicated by dotted lines. The return movement of the diaphragm as the confined air cools will then close the valve positively, instead of allowing it to be closed as when the springisused. If desired, the heater f may serve as a suspension device for a reflector or smoke-bell, g, the latter also A serving to concentrate the ascending currents of heated air upon the heater.

We do not confine our invention to a heater or reservoir for confined air arranged above the burner, for the heater or reservoir might be otherwise constructed and arranged in any suitable manner to expose it to the heat from the burner.

From the above description it will be understood that the valve 1) will be held open as long as the gas is burning, and will be closed automatically when the gas is blown out. It is however necessary to open the valve by hand in first lighting the gas. Any suitable device may be used for this purpose.

We have here shown a short rod orstem, h,

both valves are open.

which is attached to a diaphragm, h,in order toprevent leakage of gas,and which extends into the valve-box or case B. The 'upper end of the rod or stem h carries a wedge, h*, which 5 is forked to embrace the stem 12 and acts upon inclined shoulders on the stem.

Fig. 2 shows a plan of the forked wedge and a portion of the stem.

'When the gas is to be lighted, the stem 71. is

o pushed upward and the inclined face of the Wedge or cam acting on the inclined shoulders moves the stem 1/ longitudinally and opens the valve 1) against the force of the spring. The wedge or cam and the inclined shoulders 5 may have their faces serrated, roughened, or grooved, and when the wedge has been pushed up to open the valve it will be held against falling because of the pressure produced by the spring d. As soon as the con- 0 fined air begins to expand, the motor. opens ,0 tube connects and which is attached to the supply-pipe A. Upon the box or case 13* is placed the motor consisting of a diaphragm, e, and a case, 0, and with the motor-case above the diaphragm is connected the pipe f and a ,5 heater or reservoir, f, for air, as above de scribed. In the box or case 13* are two valves, j and b, which are pressed upward by springs (1* d, and thereby held closed against seats 9* a. Gas cannot pass to the burner D unless In the motor-case e is a push-rod, 7c, acted upon by the diaphragm e and supported by guides 6*, and the stem j of the valve j extends upward into the case e. Through the case 6 extends a key or shaft, 1,

.5 on which is a cam, Z, and in the same vertical plane with the cam is a swinging camlike lever or trip, on, pivoted at the upper end and having a spring, m, applied to it for drawing it away from the rod or stem It. On

{0 the stem is is a projection, Tc, having an in clined face, and the swinging cam-lever on also has an inclined end.

When the gas is to be lighted, the key or shaft Z is turned in the direction indicated by ;5 the arrow thereon, and thereby the cam l is 0 by which means the valve 12 is opened and held open. The shaftl being turned still farther acts upon the stem j, and so opens the valve 9" and holds it open. .When the confined air in the reservoir f becomes sufficiently 5 heated, the diaphragm e is still further depressed, and opens the valve 1) wide As soon as the projection kiis moved down out of en gagement with the cam-lever m, the latter is drawn away by its spring m. When the gas is blown out, the diaphragm 6 moves upward again and allows the valve b to close automatically to preventthe escape of gas.

WVe are aware that it has been proposed to arrange below the tip of a gas-burner an expansible or bellows-like chamber, which is to contain ether or other element sensitive to heat, and which, when the burner is lighted, is expanded, and caused to act through a bellcrank lever to close the valve, the burner'having the portion which is between the gas-cock and tip-socket constructed in the form of an oblong frame,which has a gas-passage formed within it, and receives in the opening or space surrounded by it the expansible chamber. Such a combination of parts we do not claim as of our invention. a

We are also aware that in connection with a boiler-furnace and a pipe and damper for controlling the supply of air thereto, have.

been employed a closed drum, which is to be arranged within the heating-chamber, and a diaphragm-motor, which is operated to control the damper by the rarefaction or expansion of air in the drum.

In our apparatus the motor serves to control the closing of avalve which is in the gassupply pipe, and said motor is independent of the heater and is connected therewith by a pipe, f, the heater not being expansible, and

we arrange the heater above the gas-burner, where it will be subjected to very considerable heat from the flame.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. The combination, with a gas burner, a gas-supply pipe; and a valve in such pipe, of an air heater or reservoir located near the burner, a motor connected with the valve in the supply-pipe, and a pipe connecting said heater and motor, substantially as herein described, whereby the confined air, when heated, will be caused to operate the motor to control the closing of said valve.

2. The combination, with. a gas -burner, a

gas-supply pipe, and a valve in said pipe, of :15

an air heater or reservoir arranged a short distance above the burner, a motor connected with the valve in the supply-pipe, and a pipe connecting said heater and motor, substantially as herein described, whereby the confined air, when heated, will be causedto operate the motor to control the closing of said connected with the valve in the supp1y-pipe, f

and a pipe connecting the heater and motor, substantially as herein described,whereby the confined air, when heated. will be caused to operation by hand, and serving to open said 10 operate the motor to control the closing of the valve when the gas is to be lighted, substantially as herein described.

valve.

4. The combination, with a gas-burner, and

5 a valve for controlling the supply of gas thereto, of an air heater or reservoir exposed to heat from the burner,a motor to be acted upon Witnesses: by the confined and heated air to hold said H. K. ROBERTS, valve open, and a cam or device capable of J AS. W. MERRITT.

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