US417719A - Automatic safety gas-burner - Google Patents

Description

(No Model.) I H N. M. GARLAND. AUTOMATIC SAFETY GAS BURNER.

No. 417,719 Patented Dec. 24, 1889.

Er Z

N PETERS, Piano-Lithographer, WalNngon, D.C.

UNITED STATES PATENT OFFICE.

NATHAN M. GARLAND, OF ST. LOUIS, MISSOURI.

AUTOMATIC SAFETY GAS-BURN ER.

SPECIFICATION forming part of Letters Patent No. 417,719, dated December 24, 1889.

Anplication filed January 26, 1389- To all whom it may concern.-

Be it known that I, NATHAN M. GARLAND, of St. Louis, State of Missouri, have invented certain new and useful Improvements in Automatic Safety Gas-Burners, of which the following is a full, clear, and exact description,

7 reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to that class of devices intended to prevent flow of gas to the burner when the flame is extinguished by accident or design 'or when the ordinary valve is opened by accident or design and the gas not ignited, the object of my said invention being to produce a simple, cheap, compact, and efficient safety appliance for gas-burners which may be mounted upon the ordinary burner-pillars of any gas-fixture, whereof the parts shall be few and simple, concealed or protected'by the burner, automatic in action, not liable to'get out of order, and permitting the ready ignition of the gas. To accomplish all of this, my improvements involve certain new and useful arrangements or combinations of parts andpeculiarities of construction, as will be now described and explained.

In the accompanying drawings, forming part of this specification, Figure l is a sectional elevation of a safety-burner constructed and arranged for operation in accordance with my invention and involving my improvements, showing a key applied for unseating the automatic safety-valve whenever required at the time of lighting the gas. Fig. 2 is a sectional view of thesafety-valve shown in Fig. 1, and Fig. 3 an elevation of the key-shaft. Fig. 4 is a view like Fig. 1, but omitting the key; and Fig. 5, a view of an expanding rod.

In all the figures like letters of reference wherever they occur indicate corresponding parts.

A is the base of a gas-burner, B its shell or body, and G the tip, all of which may be of any form and size. Within the base I mount a valve D, of which the bearing surface or face is rounded after the manner of a ball-valve, and which is as large as convenient, so that a slight displacement will open a gasway of ample extent to serve the burner. The stem of this valve passes through a bridge E, provided an-.1 No. 297,669. (No model.) I

for it, and is made hollow with its lower end closed. The bottom of the cup or well thus formed is utilized as the bearing for the lower end of the expanding rod F, by which the valve is automatically moved, and it thus brings the said bearing-point well below the face of the valve, so that the valve may be moved from its seat evenly all around or without canting and crowding, as will be readily understood. The valve-seat G, formed in the base part or mounted therein, is made sharp, forminga knife-edge seat, so that the valve will effectually close against it. A light spring H holds the valve normally seated.

The expanding rod F bears upon the tip at one end and upon the bottom of the valvestem at the other, and when cold is of length to leave the spring free to seat the valve. This rod is preferably made of aluminium, but might be of other suitable material. A 'portion of it may project through the tip, as shown in Figs. 1 and 4, near the position of the flame, or it may be mounted in the tip, as shown in Fig. 5. When a lighted match is applied over the burner, it heats the rod, which, expanding, opens the valve a trifle, and this allows a small quantity of gas to escape at the tip, which, being ignited, further heats and expands the rod, allowing more gas to pass and thus the flame to increase until of the required size. This lighting requires but a very few seconds.

In some instances it may not be desirable to wait for the'flame of the match to heat the rod, and therefore I supply a key I, passing through or connected with the valve-stem, by turningwhich the valve may be unseated, allowing a quantity of gas to escape immediately. This is ignited and immediately ex- )ands the rod. As soon as the key is released 'a spring b returns the key, and if the gas is lighted the expanded rod will prevent the valve from seating completely; but if not it will be seated and the flow of gas then arrested. The key is prevented from being turned so faras to sustain the valve in open position by any suitable stop, as a pin 0.

Between the tip and the shell of the burner I place an insulating-packing c, which confines the heat from the gas-flame or match to the region of the upper part of the expanding rod and renders the device more sensitive than it might otherwise be. This packing is not always necessary and may be omitted, if desired.

The improved burner may be mounted in the place of any of the ordinary burners. The gas-fixture or branch in which the usual gascock is mounted is not shown. The working parts are all concealed within the burner, and are thus protected against accident or disarrangement.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a safety gas-burner, the combination of an expanding rod located in the burnershell, the burner-tip, the insulating-packing interposed between said tip and shell, a ver- NATHAN M. GARLAND.

IVitn esses:

W. J. l\[ORGAN, WORTH Oseoon.

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