US653571A - Gas-burner. - Google Patents

Description

No. 653,57l. Patented July I0, |900.

- J. P. FARMER.

GAS unm-zn. (Application med .my 17, 1599.) (Nu Model.)

lmalmluuu nuumulnu v UNITED STATES 4Pnrrziwr OFFICE.

JOHN RFARMER, oFroRTLAND, cancion.

srEcIrIcArIoN forming part of 'Letters rat-ent No. 653,571, dated July 1o, 196e.

Application tiled .Tuly 17, 1899. Serial No. 724,126. (No model.)

To all whom, t may concern,.-

Be it known that I, JOHN P. FARMER, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Ore-l gon, have invented a new and useful Gas- Burner, of which the'following is aspeciiica'- tion.

This invention relates to gas-burners, and more particularly to that class known as safety gas-burners; and it has forits object to provide a device of this nature including a thermostatic cut-od valve which may be operated to open and hold open the gaspassage to the main burner and which also will operate to close the supply of gas to the main burner at a predetermined time after the extinguishing of the flame of the main burner.

The invention consists ol a valve Y and a valve-Casin g, the valve-Casin g comprising two channels leading .from one side of the valve and one of which communicates with a tubular extension, concentric with which and inclosed thereby is a main burner-tube havingr com-l munication with the other gas-passages and which latter is controlled by a separate opening in the valve. As the valve is turned it opens first the main supply and afterward the supplemental supply to the space between the main burner-tube and the inclosing tubular extension. At this time the main burneropening is closed, because of the contraction of the material of the main burner-tube, to draw a valve-seat carried thereby into operative connection with an adjacent fixed valvestem. The valve is held in this position to permit the escape of gas from the tubular extension which forms the pilot-burner, which gas is then ignited, and the heat thereof acts to expand the main burner-tube to unseat the valve therein. 'The gas then passesthrough the main burner and is ignited from the pilotburner. The valve is then released and is returned by a suitably-disposed spring to a position to aline the main burner-passage with its corresponding opening in the valve.

In the drawings forming a portion of this specification, and in which likefnumerals of reference designate vcorresponding parts in the several views, Figure lis aside elevation showing the burner complete. Fig. 2 is a vertical'section of the burner. Fig. 3 is a seced to aline at times with what is termed a Y pilot-passage 8, which is adapted to convey gas from the passage 7 to the pilot-burner formed by the upper end of a vertical tubular extension 9 at the end of the casing 5.

Below the passage 8 is a second and larger passage 10, adapted to communicate at times with a passage 11, formed through the plug 6 and adapted to convey gas from the rear portion of the casing 5 forwardly thereof. In the upper wall of the passage 10 and in axial alinement with the tubular extension 9 is a threaded perforation 12, with which is engaged the lower threaded end of a main burner-tube 13, passing upwardly through and concentric with the extension 9 and projecting thereabove. This tube 12 is of brass or other metal having a high ooeflicient of expansion, and upon the upper screw-threaded end thereof is arranged a metallic tip 14, having an interior valve-seat 15, adapted for engagement by a valve formed by the upper end of a rod 16, of steel or similar material of low expansibility. This rod 16 passes downwardly and centrally of the tube 13 and has threaded engagement with a perforation in the lower Wall of the passage 10. Normally the separation between the said valve and its seat is equal or approximately equal to the expansion of the burner-tube under the influence of the normal temperature incident -to a iiame of the usual size at the main burner. Thus if the flame be extinguished the burner-tube will be contracted to seat the valve in the seat, and thus will prevent the dow of gas through the burner.

In practice the plug 6 is rotated to the position shown in Fig. 2 of the drawings, when the passage 7 will aline with the passage 8 and the passage 11 will partially aline with the passage l0. At this time the main burner-tube will be closed against the passage of gas therethrough, while there will be an IOO a esami escape of gas from the top of the extension 9, which forms the pilot-burner. If this gas be then ignited, it will act to heat the main burner-tube tO expand it and move the seat away from the valve. The main burner-tip 14 and passage 10 will then be opened to the supply Of gas, with which the valve-casing is connected, and which gas will pass upwardly through the main burner and will be ignited by the iiame of the pilot-burner. The iiame at the main burner will then act to maintain a sufficient temperature of the burner-tube to prevent its contraction and to hold the valve open and secure a continuous supply of gas a'nd a continuous flame.

As soon as the main burner or the gas therefrom is ignited by the fiame Of the pilotburner it is desirable to cut O the iiow of gas through the pilot-burner, and to insure this action automatically the plug 6 is provided with a lug 20, extending radially thereof and bearing at its outer end upon the spring 21, seated in a recess 22 in the valvecasing and so positioned that when the plug lies to fully aline the passages 10 and 11 the lug contacts with the end of said spring, and when the lug is moved t0 cause alinement of the passages 7 and 8 it moves against the tendency of the spring and compresses it. Thus when this alinement of passages 7 and 8 is no longer required-that is, after the main burner-tube has become suiiiciently heated and the gas Of the main burner is ignited-it is only necessary to release the plug 6, when the spring 2l is rotated suiiiciently to move the passage 7 from alinement with the passage 8 and to aline the passages 10 and 11. The spring 2l is ofsuc-h a length and has such a position that when the plug 6 is in a position to close both passages the lug 20 is out of engagement with the end of the spring 2l, and this lug does not engage the spring until the plug has been rotated suiiiciently far to aline the passages 10 and ll. Therefore when the plug is moved to destroy the alinement Of the passages 7 and S and tO aline the passages l0 and 11 said plug will retain this position until rotated to cut Off the supply of gas to the main burner or to give a fresh supply to the pilot-burner in the event of the main-burner iiame being extinguished.

In Fig. 4 of the drawings there is shown a dierent construction of main burner, in which the tip has its lower portion exteriorly threaded and engaging threads on lthe inner surface of the end of the main burner-tube.

In Fig. 5 of the drawings is shown a construction in which the tip and tube are integral, it being of course understood that any other specific construction of tube may be used.

The threaded engagement of the valve-stem enables the adjustment of the valve with respect tothe seat, while in the employment of a separable tip an additional means of adjustment for this purpose is provided.

It will be further understood that various changes in the specific construction and ar rangement shown may be made and that any suitable material may be employed for the various parts without departing from the spirit Of the invention.

Having thus described the invention, what is claimed is- 1. In a gas-burner, the combination with a Casin g having a tubular extension,of a burnertube arranged concentric with the extension and formed of thermostatic material, a valveseat carried by the burner-tube, a valve for said seat, a gas-passage through the casing and communicating with the burner-tube, a. separate gas-passage formed through the casing and communicating with the interspace between the burner-tube and the extension Of the casing, a turning plug in the easing and having separate passages adapted to eom= municate with the passages of the casing, the passages of the plug lying at an angle to'each other, whereby one of said passages may lie out of register with its casing-passage, while the other plug-passage is in register with its casing-passage, and a spring adapted for inii tial engagement by the burner-plug when the burnertube passage is opened and to be compressed when the plug is moved to Open the passage to the interspace, whereby said spring will permit the plug to' lie with the burnertube open and will return the plug to close the passage to the interspace when the plug is released.

2. In a gas-burner, the combination with a main burner and a pilot-burner having separate'gas-passages leading thereto, of a turnplug having passages'adapted to register with their respective first-named passages, the passages of the plug lying at an angle to each other, whereby one of said plug-passages may lie out of register with its burner-passage while the other plug-passage is in register with its respective burner passage,- and whereby both plug-passages may communicate with the bu rnerpassages simultaneously, and a spring adapted for initial engagement by the plug when one of its passages is in register with its burnerpassage and to be compressed when the plug is rotated tO cause communication of the plug-passages simultaneously with the burner-passages, whereby the plug will be returned to register one of the passages with its burner passage and may lie in this position.

In testimony that I claim the foregoing as my own I have hereto afxed my signature in the presence of two witnesses.

JOHN P. FARMER.

Witnesses:

GEO. E. STREETER, THOs. SCOTT BROOKE.

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