US1568947A - Portable electric lamp - Google Patents

Description

Jan. 5 1926. 1,568,947

F. B. LITTLE I PORTABLE ELECTRIC LAM;

Filed Nov. 15. 1920 Patented Jan. 5, 1926.

UNITED STATES PATENT orrlca.

FREDERICK B. LITTLE, OF CHICAGO, ILLINOIS, .ASSIGHOB, BY Hm ASSIGNMENTS,

-'1'O 03m 3. BROWN, ST. LOUIS, KISSOUBI.

PORTABLE ELECTRIC Lm.

Application fled November 15, 1920. Serial In. 494,165.

To all whom it may concern: Be it known that I, FnnnnaronB. Lrrrnn,

a citizen of the United States, residing at.

Chicagorin the county of Cook and State of Illinois, have invented certain new and useful. Improvements in Portable Electric Lamps, of which the following is a specification.

The invention relates to portable electric lamps.

One of the objects of the invention is to provide a lamp having an electro-magnetic base which serves as a ready means for selfattachment to a magnetically susceptible support.

Another object is to provide a sw tch to conveniently open the circuit thru the magnet to release the lamp.

Another object is to improve the insulation of structures of this character.

Another object is to provide an attachment to the lamp by means of which small iron or steel objects, such as nuts, screws or the like, that may have fallen into inaccessible places may be picked up and conveniently removed. I

Another object is to generally improve lamp structures.

Other, further and more specific objects of the invention will become readily apparcut to persons skilled in the art from a consideration of the following description when taken in conjunction with the drawings, wherein p Fig. 1 is an elevation of the lamp. Fig. 2 is a central section in elevation. Fig. 3 is a modification, and Fig. 4 is a section taken on line 4-4 of Fig. 3.

In all the views the same reference characters are employed to indicate similar,

parts.

The lamp is espfncially convenient for machinists and wor en engaged in repairing and adjusting automoblles and the like.

The convenience and celerity with which 1 when it is not in contact with a magneti-v cally susceptible support.

The electro-magnet 5 consists of a cylinder 6 closed at one end by the wall 7 and having a central core 8, which is perforated and threaded, as at 9. An electric coil 10 1s. located within the cylinder '6"and "su-rrounds the core 8 and fills the space in the cylinder. The core 8 is held tothe .wall 7 i by means of a screw 11. A perforate disk 12-of insulating material, ovjerlies'the coil (110 aid closes the open end of the cylin- A terraced insulating--housing 13, secured to the ma net 5 by screws 14, is fastened to wall 7. T e lower end of the insulating support, 13, is cylindrical in form having a surrounding wall 15 enclosing an opening or i, chamber 16, within which connection to a cable 17 is made with the magnetb and with the lamp 18, mounted thereupon. The wall 19 closes the cylinder 15 and is much thicker and smaller in diameter, as at 20, they part 20 being round to receive a lamp guard supporting ferrule 21. The ferrule is of such size that it will conveniently pass over the lamp 18 in the act of removing the guard 22 from the support 24. The rounded cylindrical portion 15 is provided witha ledge 23 where the rounded portion 24 of a smaller diameter extends upwardly from the top wall 19. Another ledge 25 is rovided between cylindrical portion 24 an the smaller cylindrical portion 26, the latter to receive a socket 27. The socket 27 is provided with a flange 28 thru which screws 29 pass into the chamber 16 of the cylinder 15 for the purpose of holding the socket in place upon the ledge portion 25. The screw 29 is connected to one of the cable wires 30, and also to a. wire 31, that is one of the terminals of the coil 10. A hea'ded, axially movable pin 32 passes thru the center of the struc tures 24 and 26 into the chamber 16 and affords a central contact for the lamp 18. The

spring 33 bears upon the head 34 of the axially movable pin 32, and is connected by screws 35 to the insulating support and this, in turn, is connected by a wire 36 to the other terminal of the coil 10 and to the wire 37 of the cable, thus placing the coil and the lamp 18 in parallel relation in the serv ice circuit. Between wires 30 and 31 and the inner terminal of the coil 10 is a switch consisting of two contacting splring blades 43 and 44, the latter adapted to e separated from the former b a button 45 that passes thru the wall 15. y this means the circuit thru the coil 10 ma be'opened so that the structure may readi y be removed from the support to which the magnet will so tenacioualy adhere when the magnet is energize The parallel vertical rods or wires 42 of the cage 22 are electro-welded to the ferrule 21, converge nearthe top ends and are welded in a like manner to a ring 38 and to another intermediate ring 39.

In Fig. 2 a center contact lamp is shown, but by mere duplication of the pin 32 and the spring 33 a double contact may be provided.

A rod 40 is provided wth a screw threaded end 41 for insertion in the central threaded perforation of the core 8. When the rod 40 is placed in position and the coil 10 is energized the rod becomes magnetic and will attract and hold small articles such as nuts, screws and the like, which may be lifted by movement of the lamp structure.

The rod 40 can conveniently be attached to the electro-magnet 5, and removed therefrom as occasion requires.

Having described my invention what I claim as new and desire to secure by Letters Patent is z-- A portable lamp structure comprising an electro-magnet, a two-step terraced block of insulating material having a cylindrical opening in its larger end closed by the electro-ma net, the upper wall or step being much t icker than the annular wall around said opening and smaller in diameter than the lower step over which is adapted to be slipped a sleeve for supporting a lamp guard, the lower step serving as a stop for the sleeve, screws assing through the annular ledge surrounding the smaller step of the terrace and through the lower step into the upper wall of the magnet, and a lamp socket mounted on the upper step of the block and within said sleeve.

' In testimony whereof I hereunto subscribed my name.

FREDERICK B. LITTLE.

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