US155343A - Improvement in lamps - Google Patents

Description

Patented sep 1.22,1874.

0 S W EEN E Y L a m p s THE RAPHIC C0, FH'OID-LITHJSl .4| PARK FLACEJNX i60/wy No .l55,343.

.l NITED STATES OLIVER SWEENEY, OF PHILADELPHIA7 PENNSYLVANIA.

IMPROVEMENT IN LAMPS.

Specification forming part of Letters Patent No. 155,343, dated September 22, 1874,' application filed June 18, 1874.

To all whom t may concern:

Be it known that I, OLIVER SWEENEY, of Philadelphia, Pennsylvania, have invented an Improvement in Reservoirs for Lamps or Illuminating Apparatus, of which the following is a specification:

My invention relates to that class of lamps 'in which volatile burning-duid contained in a reservoir is caused, by a piston and spring, to pass upward to a burner or burners; and the object of my invention is to make a safe lamp of this class by constructing it in the manner illustrated in section in the accompan yin gdrawlng.

A is the fountain or reservoir of the lamp or illuminating apparatus, and consists of a cylindrical vessel closed at the bottom, with the exception of a small opening` communicating with api pe, B, referred tohereafter, and furnished at the top with a screw-cap, F. Within the vessel is a piston, l), which is so packed that it will fit snugly, but can move freely in, the inside of the vessel, the piston being composed, in the present instance, of two plates with intervening packing. To the piston is secured a hollow rod. E, passing through a stufng-box, a, in the screw-cap F, the rod terminating at the top in a suitable burner, b, below which there is an ordinary cock, d. Between the screw-cap and the top of the piston intervenes a spiral spring, G, of suicient strength to cause the piston to bear with considerable pressure on the surface ot the burning-fluid in the vessel A. The piston is furnished with a valve or valves, c, two in the present instance, each valve opening downward, and the stem of the valve being guided by a small bridge secured to the top of the piston, between which bridge and the head of the stem intervenes a light spiral spring, the latter tending to maintain the valve in contact with its seat.

The pipe B above referred to is bent upward and receives a portion of a smaller pipe, H, carrying a burner, t', to which the uid may be admitted, or from which it may be cut oft' by manipulating a cock, i. The pipe H,

which should be suitably packed where it fits into the pipe B, may be adjusted vertically in the latter, and secured by a set-screw, d, after adjustment.

The pressure of the spring G on the piston D is sufficient to insure the constant flow of burning-fluids through the hollow piston-rod -to the burner b, and through the pipes B and H to the burner i, so that the lluids may be ignited at either or both of the burners, orat other burners communicating with the vessel A.

I/Vhen the spring G ceases to perform its duty and the vessel requires to be replenished, fresh Huid may be poured through a nozzle, m, to which a suitable stopper is adapted. This piston is then raised by means of handles x on thc tubular rod E, when the valves c will be opened. rlhe fluid will pass into the space below the piston, and the spring' will be compressed prepara-tory to the performance of its proper duty-that of forcing the iiuid to the burners through the medium of the piston.

It should be understood that no new principle is involved in the above-described lamp, the piston, with its valves, being old, and the spring for actuating the piston being also old. It will be remarked, however, that the volatile tluid cannot gain access to orpenetrate through the stuffing-box, owing to the peculiar construction ot the lamp.

I claim as my invention- In a lamp having a coiled spring bearing downward on a valved piston and a burner communicating with the oil-space under the piston, the combination of the air-tight reservoir, piston-rod, and packing-box, as and for the purpose described.

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

OLIVER SWEENEY.

Witnesses WM. A. STEEL, THoMAs McILvAIN.

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