US1377480A - Lamp-fixture - Google Patents

Description

C. J. HENSCH EL.

LAMP FIXTURE. APPLICATION-FILED MAR. gs, 1919.

1,377,480. Patented May16, 1921.

ATTORNEY- UNITED STATES rATEN'r err-ice.

CHARLES J. HENSGHEL F BROOKLYN, NEW YORK.

LAMP-FIXTURE.

Application filed March 28, 1919. Serial No. 285,903.

I clear, and concise description.

, My invention relates tolamp fixtures employed in connection with lamps used on shipboard, for the purpose of protecting the lamp against breakage and also against the entrance of moisture thereinto.

More particularly stated, to seek to provide a lamp fixture of the type stated, in which the mechanism is greatly simplified as well as rendered more efficient and reli able.

Reference is made to the accompanying drawing forming a part of this specification, and in which like letters indicate like parts in all of the figures.

Figure 1 is a front view of my device, and is partly in elevation and partly in section.

Fig. 2 is a fragmentary plan view of the same.

A base 3 has the general form of a massive cup, and serves as a support for the device. This base is provided with bosses P and with a rim 41 having an annular groove 5. The rim 4 has also a number of lugs 6, each threaded internally as shown at the right of Fig. 1. The base 3 is further provided with a form of lug 7, through which screws may be extended in order to secure the fixture to a deck, a wall or a floor as the case may be.

The cup 3 with its rim 4 and lugs 6 and 7 is cast integral in a single piece.

A lamp base is shown at 8, and extending from it is an incandescent lamp 9, of the usual or any preferred construction.

A clamping ring 10 of massive construction is provided with lugs 11 cast integral with it. Each of these lugs is provided internally with a threaded surface 12. Screw bolts 13 extend through the lugs 11 and into engagement with the lugs 6, for the purpose of holding the clamping ring in position upon the base. These screw bolts are of such form as not to be too easily disconnected from. the clamping ring.

A gasket 14 of rubber or resilient composition is located within the groove 5, and the clamping ring 11 is provided with an annular flange 15 for engaging this gasket,

in order to make a joint which is watertight. For this purpose the flange 15 projects slightly away from the adjacent surface of the clamping ring.

A glass globe 16, having the general form of a dome, is provided with a flaring base portion 17, the clamping ring being also slightly flared so as to it neatly upon this base portion. A thin filling 18 of cement is disposed between the inner surface of the clamping ring and the adjacent outer surface of the hearing or base portion of the glass globe. The cement thus used is preferably made of litharge and glycerin, but any other cement or cementitious material, suitable for the purpose, may be used instead. The cement here contemplated makes a joint which is water-tight, dust proof and airtight.

A number of metallic rods 19 are screwed into the holes in the clamping ring 10, and these rods are riveted securely to the ring 20 and spaced equidistant.

The rods 19 also extend through holes in,

a ring 20 and are riveted to this ring.

The ring 20 carries a number of curved bars 21 which support a ring 22 of much smaller diameter than the ring 20. The rings 20 and 22 with the bars 21 extending between them are cast integral with eaeli other and thus made in a single piece, having the form of a skeleton dome. This piece has a good many advantages. Because it is an integral casting no part of it can work loose or become displaced, or get lost. By its use the cost of manufacture greatly lessened.

A chain 23 is by fastenings 24, 25 connected to the clamping ring 10 and the boss 4r, forming a part of the base 3. The purpose of this chain is to prevent the base and clamping ring from becoming completely disconnected each from the other, and particularly from preventing either of these two parts from dropping to the deck while the other is being handled.

The device constructed as above described consists of a relatively small number of pieces, very strongly put together. For most practical purposes, the clamping ring 10, rods 19 and the skeleton dome comprising the two rings 20 and 22 with the curved bars 21 may be treated as a single piece.

I do not limit myself to the precise mechanism shown, as variations may be made Specification of Letters Patent. Patented 1513, 10 1921. i

therefrom Without departing from the spirit ofmy invention as defined by the claims.

I claim:

1. In a lamp fixture the combination of a base for supporting an incandescent lamp, a clamping ring detachably mounted upon said base and provided With a flaring surface, a glass globe extending through said clamping ring and provided With a flaring edge portion engaging said flaring surface thereof, a plurality of rods mounted upon said clamping ring and provided With ends extending therefrom, and a metallic dome cast in a single piece and mounted upon the ends of said rods, and coacting therewith to protect said globe.

2. As an article of manufacture, a lamp fixture comprising a base having the form of a cup and provided With a groove of annular form, a gasket located Within said groove, a clamping'ring separate from said base, said clamping ring having an annular flange extending from it and so disposed that said annular flange can be fitted to abut edgewise against the face of said gasket, means for forcing said clamping ring to- Ward said base in order to press said annular flange edgeWise against the face of said gasket, and a globe carried by said clamping ring.

3. In a lamp fixture the combination of a base provided With a groove, a gasket located Within said groove, a clamping ring provided With a projecting flange so disposed that with the parts in position said flange abuts edgewise against the face of said gasket, said clamping ring being further provided With a flaring surface forming a continuation of said projecting flange, a globe provided With a flaring surface'mating said flaring surface of said clamping ring and secured firmly thereto, and means for forcing said clamping ring toward said base.

CHARLES J. HENSCHEL.

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