US1494208A - Electric-lamp support - Google Patents

Description

May 13, 1924.

. P. S. BAILEY ELECTRIC LAMP SUPPORT Filed Ndv. 11.'

Patented May 13, 1924.

PER-CY S. BAILEY, OF LYNN, MASSACHUSETTS, ASSIGNOR lO GENERAL ELECTRIC COM- P ANY, A CORPORATION OF NEW YORK.

ELECTRIC-LAMP SUPPORT.

Application led November 11, 1922. Serial No. 600,423.

To all. ft-om t may concern.'

Be it known that l, Pnnor S. BAILEY, a citizen of the United States, residing at Lynn, in the county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Electric-Lamp Supports, of which the following is a specification.

The present invention relates to means for supporting and insulating electric lamps operating on high potential circuits.

When an electric lamp operating under high potential current, as in series street lighting, is mounted on a metal post'or other support, there is danger of inflicting serious injury to anyone coming in contact therewith by reason of the accidental escape of current to such metal post from the regular conductors or from the lamp.

The object of my invention is the provision of an improved electric lamp support which shall be protected against becoming charged from the circuit conductors and from the lamp, and which shall be simple and ornamental in appearance and of low cost.

One form of the invention is shown in the accompanying drawing, in which:

Fig. 1 is a perspective view of the support and a lamp carried thereby, and Fig. 2 is a vertical section of the outer end of the support.

The support is in the forni of a bracket or bishops crook 1 made of iron pipe carried by a. connecting block 2 connected to an iron post 3. At the outer end of the crook 1 is attached a cast iron carrier shell or bell et having an upwardly extending boss 5 tapped for threaded engagement with the crook and a depending drip flange 6 which operates to prevent any moisture of condensation in the crook from spreading over the inner wall of the bell 4 and coming in contact with the insulator 7 carried there by. The insulator 7 is of porcelain and in the form of a cylindrical tube of two diam eters. The larger diameter portion 8 is of a size to fit freely within the bell e and has its inner surface provided with annular cor rugations 9, and the smaller diameter portion 10 has its outer surface provided with annular corrugations 11 and at its union with the larger portion 8 are formed an internal shoulder 12 and an external shoulder 13. A split washer 1/1 is placed about the smaller diameter portion 10 just beneath the shoulder 13 and is attached by screws 1.5 to a rabbet inside of a drin flange 1G at the lower end of the bell 4 and serves as a seatA for the insulator 7 and the lamp carrying part 17 supported thereby. Cushions in the form of packing washers 18 and 19 of fibrous insulation are arranged at `both ends of the larger diameter portion of the insulator 7.

The part 17 carried by the insulator has a hook 2O for the reception of the lamp bale 21, a tubular shank 22 and a flanged head 23 provided with an upturned edge 24 to form a pan for the reception of any water that may drip from the upper flange 6. The head 23 rests upon the internal shoulder 12 of the insulator and the part 17 is held from moving upwardly in the insulator 7 by a colla-r 25 surrounding and clamped to its lower end by set screws 26. This collar has pivoted thereto opposite the hook 20 a latch 27 which operates to prevent the accidental escape of the lamp bale 21 therefrom.

The lamp 28 is provided with a supporting insulator 29 in the form of a spool which is surrounded by the bale 21 and on opposite sides thereof with binding posts 30 and 31 by which the insulated conductor wires 32 connect with the operating mechanism of the lamp. These insulated conductors extend through the hook part 17 and up through the crook 1 as is customary in conduit wiring where they are protected from injury to their insulation.

It will be observed that the lamp itself is protected from grounding by its spool insulator and the support insulator 7 and that the only unhoused portions of the conductor wires 32, between the hook member 17 and the binding posts 30 and 31 are effectively insulated from the bell et by the insulator 7.

lVhile I have shown and described the best embodiment of the invention known to me, I do not desire to be restricted thereto.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. In an electric lamp support, the combination of a tubular bracket, a carrier shell having means for attachment to said bracket, a tubular insulator having an interiorly corrugated upper portion and a contracted lower portion supported by said shell, and a lamp carrying part having a tubular shank carriedby said insulator independent ot said shell.

2. In an electric lamp support, the combination of a carrier shell7 a tubular insulator having largey and small end portions and an intermediate shouldered portion, means for securing the larger portion of said insulator within said shell, a lamp carrying part having a flange at its upper end adapted to engage the internal shoulder of said insulator, and a collar secured to vthe said lamp carrying part and adapted to engagethe lower end of said insulator.

3. In an electric lamp support, the combination of a carrier shell, a tubular insulator supported by said shell, a hooked lamp carrying. part having a hollow shank supported by said insulator, ak collar secured to the' shank of-said lamp carrying part beneath said insulator, and a latch pivoted on said collar adjacent the hook o said lamp carrying part.

4. In an'electric lamp support, the combination of a carrier shell having an interior drip flange thereon, a tubular insulator mounted within said shell, and a lamp carrying part mounted within said insulator and provided with water gathering means.

5. In an electric lamp support, the combination of a carrier shell7 a tubular insulator having an enlarged upper end portion, corrugations Jformed on the inner sidewalls ofthe enlarged end portion of said insulator, means within said shell for shedding moisture away Yfrom said corrugations, and' a tubular lamp carrying part supported within said insulator and provided with water gathering means at its upper end.

In witness whereof, I have hereunto set my hand this sixth dav of November, 1922.

PERCY S. BAILEY.

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