US722027A

US722027A - Safety gas-burner.

Info

Publication number: US722027A
Application number: US10106102A
Authority: US
Inventors: John B Loughead
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-04-02
Filing date: 1902-04-02
Publication date: 1903-03-03
Anticipated expiration: 1920-03-03

Description

PATENTE D MAR. 3, 1903. J. B. LOUGHEAD.

SAFETY GAS BURNER. APPLICATION FILED APR. 2, 1902. N0 MODEL.

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JOHN B. LOUGHEAD, OF ELIZABETH, NEW JERSEY.

SAFETY GAS-BURN ER.

SPECIFICATION forming part of Letters Patent No. 722,027, dated March 1903- Application filed. AprilZ, 1902. Serial No. 101,061. (No model.)

To (I/ZZ whom it may concern:

Be it known that I, JOHN B. LOUGHEAD, a citizen of the United States, and a resident of Elizabeth, in the county of Union and State of New Jersey, have invented a new and Improved Safety Gas-Burner, of which the following is a full, clear, and exact description.

The invention relates to safety devices utilizing expansion and contraction bars for antomatically turning off the gas in case the gasflame is accidentally extinguished.

The object of the invention is to provide a new and improved safety gas-burner which is simple and durable in construction and arranged to allow convenient turning on and off of the gas in the usual manner and to antomatically turn oii' the gas in case the gasflame is accidentally extinguished-that is, without the operator turning ofi the gas.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corre sponding parts in all the views.

Figure 1 is a side elevation of the improvement. Fig. 2 is a side elevation of the lever locking the gas-cock and spring-barrel. Fig. 3 is an enlarged sectional side elevation of the gascock and parts connected therewith. Fig. l is an inverted plan View of the same, and Fig. 5 is an enlarged side elevation of the expansion and contraction bar and its bearing.

The gas-cock A has its easing A secured in the usual manner to the service-pipe B, and the gas-cock casing supports the burner O, of any approved construction, and also the framework D, carrying the lamp-chimney. The gas-cock A is provided with a conical plug A mounted to turn in the casing A, for turning the gas on or ofi, the motion of the said plug being limited by a stop-pin E, held in the casing A and adapted to be engaged by spaced shoulders or logs on a plate E, attached to the apex end of the plug A as plainly shown in Fig. 3.

On the base end of the plug A is mounted to turn loosely a spring-barrel F, containinga helical spring G, secured at the end G to the casing A and at its other end G to the bottom of the barrel F, the said end G2 preferably projecting a distance below the bottom of the barrel and forming a pin in the path of a shoulder A on the plug A so that when the operator takes hold of the plug-handle A and turns the plug A from a closed position into an open position then the spring-barrel F is carried along with the plug to wind up the spring G.

. On the under side of the spring-barrel F are formed ratchet-teeth F, adapted to be engaged by a tooth H on a lever H, fulcrumed at H on the casing A, the free end of the said lever being engaged at one end by a spring I, attached to the casing A, and the other end of the said lever H is pivotally connected with the expansion and contraction bar J, extending upwardly through the burner-casing of the burner O and through a bracket or yoke K, secured to the upper end of the framework D, previously referred to. The nut J screws on the upper end of the bar J and is locked in place by a jam-nut J the said out J normally resting on top of the bracket or yoke K, as plainly shown in Fig. 1.

The device is used as follows: When it is desired to light the burner O, the operator takes hold of the handle A and gives a quarter-turn to the plug, so as to allow the gas to pass from the service-pipe B through the gascock A to the burner O, on which'the escaping gas is ignited. The flame from the burning gas now heats the bar J, so that the latter expands, and in doing so allows the spring I to impart a swinging motion to the lever H to engage the tooth H with one of the ratchetteeth F to hold the spring-barrel F in a locked position against the tension of its spring G, at the same time leaving the plug A in an open position, but free to be turned into a closed position by the operator whenever it is desired to do so. It is understood that the operator must hold the plug A in an open position until the bar J is sufficiently expanded to allow the tooth H of the spring-pressed lever H to engage with a ratchet-tooth F, as otherwise the spring G would return the barrel F and the plug A to a normal closed position. After the lever H is swung into a locking position, as described, and the bar J expands farther by the heat from the gasflame then the bar on account of being held fixed at the locked lever expands upwardly to lift the nut J off the lug or bracket K, (see Fig. 5,) so that the said bar J is not bent into an undesirable shape. Now in case the gasfiame is accidentally blown out then the bar J in cooling contracts to finally set the nut J on the bracket K and to then exert a pull on the lever H, so as to impart a swinging motion to the latter to move the tooth 1-1 out of engagement with a ratchet-tooth F to allow the spring G to turn the barrel F and plug A for the latter to close the gas-cock, and thereby shut the gas off from the burner C.

It is understood that while the plug A is in an open position and the flame is burning the operator can turn the plug into a closed position to shut 03 the gas and extinguish the flame, so that the bar J on cooling acts on the lever H to swing the latter out of engagement with the ratchet-tooth F to cause the spring G to turn the barrel F back to its normal position-that is, until the end G2 abuts against the shoulder A of the plug moved to a closed position by the operator. Thus the plug A can be readily opened or closed by the operator when turning the gas on or 01f; but the plug is automatically turned off in case the flame is accidentally extinguished.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. Asafetygas-burner,comprisingaspringpressed gas-cock, held normally in a closed position by the action of the spring, and adapted to be normally turned into an open or a closed position, and an expansion and contraction device, said device comprising a spring-barrel loosely mounted on the plug, and having a series of ratchet-teeth; a yoke located at the top of the burner-frame, a vertical expansion-bar supported thereby, and passing downwardly through the casing of the burner, and a spring-actuated lever connected to said bar, said lever having a tooth designed to cooperate with the ratchet-teeth of the barrel, when the burner is lighted, to engage and lock the barrel in the position into which it is moved against the tension of its spring as set forth.

2. A safety gas-burner, comprising a plug held normally in a closed position by a spring attached at one end to the casing of the cook; a barrel inclosing said spring and having an aperture through which the other end of said spring extends to form a projecting pin on the outside of the barrel, a shoulder on the plug designed to engage said pin, turn the barrel and thereby impart tension to the spring when the plug is moved to an open position, a series of ratchet-teeth on said barrel, a springpressed lever having a tooth for engaging said ratchet-teeth to hold the barrel in position against the tension of the spring, an expansion and contraction bar connected with said lever and extending upwardly through the casing of the burner to the top of the frame, and means for loosely supporting said bar at its upper end, whereby after the lever has been moved into engagement with the barrel by the expansion of the bar, the bar is prevented from being bentby the further expansion thereof, as set forth.

3. A safety gas-burner, comprising a gascock,a spring-barrel connected therewith to be turned by the plug of the cock,the said springbarrel being provided with ratchet-teeth, a spring-pressed lever having a tooth for engaging the said ratchet-teeth, an expansion vand contraction bar connected with the said lever, and a bracket in which the said bar is free to slide in the direction from the lever, the bracket holding the bar against bodily movement toward the lever, as set forth.

4. A safety gas-burner, having a gas-cock comprising a plug mounted to turn, a barrel loose on the plug mounted to be turned in one direction thereby, and a spring for pressing the said barrel, to return the plug into a closed position, as set forth.

5. A safety gas-burner, having a gas-cock comprising a plug mounted to turn, a barrel loose on the plug mounted to be turned in one direction thereby, a spring for pressing the said barrel, to return the plug into a closed position, and a retaining device for the said barrel, to hold it against return movement and allow turning of the plug into a closed position, as set forth.

6. A safety gas-burner, having a gas-cock comprising a plug mounted to turn, a barrel loose on the plug connected with the same, to be turned in one direction thereby, a spring for pressing the said .barrel, to return the plug into a closed position, and a retaining device for the said barrel, to hold it against return movement and allow turning of the plug into a closed position, the said retaining device comprising a lever adapted to engage the barrel and hold it against return movement, and an expansion and contraction bar under the influence of the flame of the burner and connected with the said lever, as set forth.

7. A safety gas-burner, comprising a gascock, a barrel loosely supported on the plug of said cock, and inclosing a spring having one end attached to the casing of the cock,

and the other extending through an aperture in said barrel, and forming a projecting pin in the path of a shoulder on the plug, said shoulder being designed to engage said pin, turn the barrel, and impart tension to the spring when the cock is opened, the said spring-barrel being provided with ratchetteeth, a spring-pressed lever having a tooth for engaging the said ratchet-teeth, an expansion and contraction bar connected with the said lever, and a bracket at the top of the chimney-frame, in which bracket said bar is free to move in the direction from the lever, the bar being provided with means whereby the bracket holds it against bodily movement toward the lever, as set forth.

8. The combination with a detachable gasconnected with the other end of said lever to operate.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN B. LOUGHEAD.

Witnesses:

CHAS. J. STUART, JOHN A. WALLACE.