US632518A - Safety appliance for lamps. - Google Patents

Description

Patented Sept. 5, I899.

W. J. DOWNEY.

SAFETY APPLIANCE FOR LAMPS.

(Application filed Tm 24, 1899 (No Model.)

WITNESSES:

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ATTORNEYS m: punms PEYERS c0. rno'murno. wAsnmomm NlTED STATES PATENT Erica XVILLIAM J. DOWNEY, OF NEWARK, NEW JERSEY.

SAFETY APPLIANCE F OR LAMPS.

SPECIFICATION forming part of Letters Patent No. 632,518, dated September 5, 1899.

Application filed January 24,1899. Serial No. 703,254. (No modelfi To ctZZ whom it may concern:-

Be it known that I, IVILLIAM J. DowNEY, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Safety Appliances for Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The objects of this invention are to secure increased safety against explosion of a lamp or stove, to provide a simple and inexpensive construction, to enable the safety devices to be applied to lamps now commonly found in the market, to more effectually prevent the air-passages from becoming clogged by accumulations of dust, and to secure other ad' vantages and results, some'of which may be referred to hereinafter in connection with the description of the working parts.

The invention consists in the improved appliance for lamps, oil-stoves, and the like employing combustible fluids adapted to generate gases of more or less explosive character and in the arrangements and combinations of parts of the same, all substantially as will be hereinafter set forth and finally embraced in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several views, Figure 1 is an elevation showing a portion of an ordinary lamp to which my improvement has been applied. Fig. 2 is a transverse section of the same, taken at line m. Fig. 3 is a vertical section taken through the vertical axis of the appliance. Fig. 4 is a detail elevation of a portion of the appliance, showing means for closing the air-passage thereof 'when the lamp or stove filled with oil is to be conveyed from place to place and it is desired to effectually prevent the escape of oil through the said air-passage.

In said drawings, a indicates a lamp, stove,

oil-chamber, or receptacle having a filling-- opening through which the oil is poured from a can or reservoir into said chamber or receptacle, the said chamber or receptacle being ordinarily provided, especially when the lamp-body is of glass or the like, with ver= tical flanges (not shown) around said opening, formed usually integral with the said body. Around this said flange is ordinarily applied a collar b, which is held in place frequently by cement, plaster-of-paris, or any other suitable material, the said collar at its upper end having a screw-thread to receive the threaded cap of the lamp. This collar Z) may be of any shape or construction commonly found in lamps or may be especially provided in connection with the improved safety appliance.

cindicates the bodyof the safety appliance, which consists, preferably, of a cylindrical or approximately cylindrical piece of metal having threads 0 at its .lower end adapted to en gage the threads of the collar b. Above said threads the said body 0 is provided with a num* ber of small perforations c ,which serve to allow an outflow of any gas from within the oilchamber of the body or receptacle a, thus preventing any accumulation of gas under pressure within the said body a and a consequent explosion when the latter is heated. The perforations c extend horizontally through the sides of the cylindrical body 0, and thus, although small, there is no danger of their becoming clogged by dust settling on the body, and they are constantly uncovered from the outside, so that they can readily be cleaned out should by any possibility said holes become clogged. The top of the said body 0 is also provided with screw-threads.

The cap (Z, closing the upper end of the perforated portion a, prevents the mischievous insertion of articles into the lamp. The cap cl also serves under some circumstances as a bearing or support for a valve or closure 6, the latter comprising a rod f, having a pivotal bearing in said cap d and above the said cap having a finger piece or handle g, by means of which the said rod may be turned in the said cap. The said rod f is threaded,

and upon it is arranged a correspondinglyportion of the lamp become heated and the with the shaft f, and thus to insure a positive movement of the valve-head. By turning the handle g in one direction the said valve-head is forced down upon its valve-seat, closing the oil or air passage j, and thus preventing the escape of oil, should it be desired to convey the lamp a distance, and avoiding danger of spilling the oil through the said passage.

The perforations 0 while permitting an outflow of oil, are of sufficiently small size as to prevent the passage of a flame therethrough, and thus should the wick-receiving accumulation of dust and oil thereon become ignited the flame will not pass through the perforations 'into the lamp to ignite the oil therein.

While I have described the invention in its preferred form, I am aware that various other changes may be made in adapting the device to various conditi0ns,'and while I have described the invention in positive terms I do not wish to be understood as limiting myself thereby excepting as the state of the art may require.

Having thus described the I claim as new is- 1. The combination with the threaded collar l), of a threaded cylindrical body 0, having a number of small perforations extendin g horizontally through the walls thereof and invention, what having threads at its upper and lower ends, the perforations being disposed intermediate of said ends, a cap (1, closing the upper end of said perforated body a, and providing a perforation and bearing for a shaft f, a fingerpiece for manipulating said shaft from the turn in said perforation and at its inner end being threaded and at its outer end provided with a finger-piece, and a valve-head arranged within the perforated portion c,on the threaded end of the shaft, all substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 14th day of January, 1899.

WILLIAM J. DOWNEY.

iVitnesses:

CHARLES H. PELL, C. B. PITNEY.

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