US835117A - Lighting appliance for gas-lamps. - Google Patents

Description

No. 835,117. :PATENTED NOV,- 6, 1906.

v SLS'HAW. LIGHTING APPLIANCE FOR GAS LAMPS.

APPLIOAZ IOI FILED APB. 6,1904.

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T OFFICE. SAMUEL sHAw, or EAST RIGHMOND,IVICTORIA, AUSTRALIA.

LIGHTING APPLIANQE FOR GAS-LAMPS.-

Specification of Letters Patent. Application filed Apri15,19p4. Serial o. 201,637.

Patented Nov. 6, 1906.

i To all whom it may concern:

Be it known that I, SAMUEL SHAW, a subject of the King of Great Britain, residingat 50 Chestnut street, East Richmond, in the State of Victoria, Australia, have invented certain new and useful Improvements in Lighting Appliances for Gas-Lamps of which the following is a specification.

This invention provides improvements in fittings or appliances adapted for use in con:

nection with those incandescent gas-lamps in.

which the illuminating power is raised to a very hi h degree by the employment in the lam 0? a lon suction or mixin tube. My app iance ena%les such lamps to be lighted or extinguished by the turning on or off of a tap that is arranged in a convenient position in the gas-pipe leading to the lamp. Thus a lamp may be set outside in the street, the tap for lightin same being Within the building to which theTamp is connected. I

In order to make the invention clear, I will proceed to describe same with reference to the accompanying sheet of drawings, in which Figure 1 shows vertical section of the appliance fitted to a lamp of the class above mentioned. Fig. 2 shows sectional plan of same, taken on line A A of Fig. 1.

I employ a small cylinder a, having a shoulder that forms a seat a for a valve and a neck af of less diameter, said neck being screwthreaded externally and covered by a cap m, that has perforations m preferably four. The c linder a screws onto a tube 1). The top of t e tube 6 forms a seating for a valve 0, and the cylinder a forms a box for the said valve. The cylinder 0, rests at its base on a flange 12, formed on the tube b. The valve carries a spindle c and this spindle extends through a perforated uide-piece 0 set across the tube 12. The tu e b is internally threaded at its base I) to fit upon the gas-sup ly pipe k. A branch pipe 61 proceeds at rig t angles from the tube 1), the bore of the said pipe being less than that of the tube just described. A small vertical pipe 6, having an internal bore of about one-sixteenth of an inch in diameter, is carried by the pipe (1, and a screw-pin f is provided to adjust the opening at the base of the said pipe. The top of the tube 6 is made roughly in the form of a valve-seat, the edges being serrated with knife-cuts to allow of leakage of gas when valve is on its seat. Such valve consists of a small steel ball g An exterior vertical tube h surrounds the tube e and rests upon the pipe d, the top of the tube It being formed internally as a seat for the ball-valve and having a perforation. The valve 0 is constructed, preferably, out of a piece of Elite metal, and its bulk forms about one-t 'solidor in form of a cup, and its top may have a broad groove cut across its diameter, so as to prevent the top of the valve when moved upward by a strong pressure of the gas from completely closing in the top ofthe dome I from the gas below; but in practice the valve will not rise to the dome, but will be ,lifted from its seat sufiiciently to allow passage of gas to the burner.

The construction so formed is designed to fit into the lamp of the class above referred to. The cylinder 0, with the cap m, lies within the suction-pipe l of such lamp ,and the tube It lies within an enlarged end or bell l of the small pilot or lighting-tube Z that leads to the interior of the burner, to provide for a continuous small light when the main light is extinguished. The base of the tube 6' rests upon a cup F, that supports the suction or mixing pipe Z and allows of the admission of air to same. By these means it is possible to readily remove and replace the burners and mixer-tube and the upper end of the pilottube together with the mantle.

In operationmy invention works as follows: A small by-pass pipe is arranged at the gassupply cocksay within the room or any other convenient distance from the burner. Through this small supply-tube the as continually flows past the stop-cock su cientl to find its way up to and under the small bal valve 9, where it escapes or leaks away through the serrated cuts to and up the tube 1 at the top of which it continuously burns, while the main burner is not alight. When it is desired to light the main burner, the main gas-su ply cock is turned on, so as to allow the fulFsupply and pressure of gas to proceed forward under the specially-constructed circular valve 0 of the burner. The pressure of such gas lifts the valve 0 a sufficient height and allows the gas to proceed up to the main burner above, where it 'is ignited from the small pilot-light hereinbefore referred to.

Meanwhile, owing to the increased pressure and volume of gas accumulatin at the small ball-valve g, the ball will be b own upward against the top of the tube It, thus practically extinguishing the small light burnin while the main burner is lighted. The balT-valve,

d of a sphere and which maybe i the main burner.

however, does not close opening so but that there is. always a'slight leakage-of gas sufii, cient to maintain the small light, while the The perforated cap m willpreventany roaring noiseas'the-gas enters thesuctionf pipe Z'fronrthe cylinder aand which is at- 4 present an objectionable feature inconnecappliance is not in use.

tion with the use of these lamps where my 1 "Having thus describedmy invention, what Iclaim;and-desire to secure by Letters Pat- A burner for incandescent'lamps comprising amain-valve casing, avalve therein con- 1 trolled, as to its opened'or closed oonditionf, 7-*by= the intensity'of' the gas-pressure; a pilotiburner device connected with said valve-cas- 111% back of the mainzvalve and containing a va ve controlled by the intensity of the gas- -pressure to OPGIIOIlGlOSG it oppositely to the main valve, a bell surrounding said parts and provided with air-inlets, a miXing-tube forming an upward extension of said bell and adapted to carry the mantle, a cap for the main valve-casing having a plurality of discharge-openin s discharging upwardly into said miXing-tu e and a tube leading from the pilot-valve casing intothe mixing-tube and thence upwardly to the ignition-pointof the burner.

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

SAMUEL SHAW.

-Witnesses:

A. O. SAcHsE, A. HA'RKER.

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