US809727A - Gas-fixture. - Google Patents

Description

PATBNTED JAN. 9, 1906.

P. J. NEVI NS. GAS FIXTURE. APPLICATION FILED FEB.23,1905.

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Specification of Letters Patent.

rammed Jan. 9, 1906.

Application filed February 23, 1905. Serial No. 246,830.

To all whom it may concern:

Be it known that I, PATRICK J. NEVINS, a citizen of the United States, residing at Haverhill, county of Essex, Massachusetts, have invented certain new and useful Improvements in Gas-Fixtures; and I do hereby declare the following to be a full, clear, and ex act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to gas-fixtures, and more especially to such fixtures as are employed in connection with incandescent lighting by means of the Velsbach or other luminous mantles.

The objects in view are to provide for the delivery of the gas in a heated condition at the point where it mixes with the air and incidentally also to protect the ceiling against burning and discoloration when the fixture is used indoors.

A further object in view is to provide a simple and effective form of valve which will permit the maintenance of a small pilotfiaine when the pressure is not turned on and which will automatically open and supply suflicient gas to illuminate the mantle when the pressure is turned on.

The invention is illustrated in the accompanying drawings, wherein Figure 1 shows in elevation a fixturehaving a single burner. Fig. 2 shows in elevation a similar fixture with double burner.

Fig. 3 is a sectional detail illustrating the construction of the valve which is applied to either form.

Referring to these views, a denotes the gassupply pipe, 1) indicates the burner, and c indicates mantles of the WVelsbach or other type. Chimneys d are shown in connection with both forms of fixture. Such chimneys may or may not be employed, as preferred; but whether employed or not the supplypipe a immediately above and in line with the mantles is coiled into the form of a hood or cone, as shown at e, the windings of the coils being preferably arranged close together, so as to form above and in line with the mantles an overhanging cone, hood, or bell. As illustrated in the drawings, the windings of the coil are slightly separated, so that the overhanging cone impedes, breaks up, and dissipates the rising products of combustion. If preferred, however, these coils may be arranged in actual contact, so as to form an imperforate hood or cone which will entirely prevent the direct upward passage of those products and deflect them out laterally at the base of the cone. 4

As will be understood from the drawings, the gas entering the pipe will traverse the coils forming the cone or hood and become heated by radiation from the mantle beneath and will be delivered to the burner d in a condition most favorable to the thorough intermingling of the same with the air entering at the usual point under the regulating-cap g. It will also be noted that the cone or hood serves to dissipate or break up and deflect the products of combustion arising from the mantle, and thereby protects the ceiling against burning and discoloration.

As illustrated herein, the invention is adapted to be applied to systems where the lighting of the mantles is controlled by raising or lowering-the pressure at the central station. If desired, however, the coiled cone or hood feature may be applied to fixtures where the gas is turned on and oh by hand by means of ordinary stop cocks in the burner-pipes.

In connection with the automatic lighting of the mantles above described the con struction of the valves illustrated in Fig. 3 will be employed. As here shown, the pipe a, just below the lower end of the burnerpipe I), is provided with a valve-seat h, and a gravity-valve i, that is shaped to conform to the seat, rests its weight upon it. The weight of the valve is suitably proportioned to the pressure of gas in the pipe, so that when full pressure is turned on the valve will be lifted from its seat so as to permitsuflicient gas to pass to illuminate the mantle, but so also that when the pressure is reduced below the predetermined point the valve will settle upon its seat and close off the main supply of gas, but will still permit a small amount to pass tion, or passage m, that is formed preferably through the valve between its edge and the seat and forms a pilot-light for the purpose well understood.

Although I have herein shown the invention as applied to incandescent fixtures, it is to be understood that it may also be applied to fixtures employing an illuminating flame instead of the incandescent mantle. It will also be understood that although the valve t is herein shown as a gravity-valve it may be held to its seat by a spring, provided such spring be properly graduated and the presthrough the notch, perfora- I IIO sure applied so as to automatically open and burner, and a gas-supply pipe, the latter beclose, as above described. *3: E155; a

The supply-pipe as herein shown is coiled in the form of a cone; but obviously the cone may take the form of an arched hood or dome, or indeed any other form that Will serve to collect and temporarily confine the heated air for the purpose above described.

Having thus described my inventionpvhat I claim, and desire to secure by Letters Patent is' Iii a gas-fixture, the combination of a ing coiled above the flame mto the form of a hood or cone closed at the top, for the purpose of serving as a bell to protect the ceiling against burning and discoloration.

In testimony whereof I affix my signature in presence of two Witnesses.

PATRICK J. NEVINS.

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