US1561554A - Magnetic fixture - Google Patents

Description

Nov. 17, 1925. 1,561,554

F. B. LITTLE MAGNETI C FIXTURE Filed Sept. 2, 1921 Patented Nov. 17, 1925.

UNITED STATES FREDERICK B. LITTLE, OF CHICAGO, ILLINOIS.

MAGNETIC FIXTURE.

Application led September 2, 1921.

0 all whom t may concern.'

Be it known that I, FREDERICK B. LITTLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Magnetic Fixtures, of which the following is a specification.

This invention relates to magnetic xtures.

It will be explained as applied to a lixture for supporting a portable electrical appliance, suoli as a trouble lamp for an automobile.

One of the objects of the invention is to provide an improved fixture for portable electrical appliances.

Another object is to provide an improved magnetic support for portable electrical appliances. v

Another object is to provide a fixture which is neat, compact, efficient and inexpensive.

Another object is to provide an improved fixture for a portable automobile trouble lamp.

Another object is to provide an electromagnetic fixture which may b e readily tapped into the circuit ot the appliance with which it is to be used.

Other objects and advantages will hereinater appear.

An embodiment of the invention is illus trated in the accompanying drawing, where- Fig. 1 is a perspective of the fixture.

Fig. 2 is an axial cross section thereof.

Fig. 3 is an elevation thereof.

Fig. d is an enlarged cross section through. the terminal support.

Fig. 5 is a perspective oit the fixture supporting a portable trouble lamp.

rlhe fixture comprises, in general, a inagnetizable base, a holder for detachably supporting a ortable electrical appliance and terminals -tor readily tapping into the oircuit of the appliance to obtain current for energizing the magnet.

The base has a cup shaped outer shell or casing 1 of suitable magnetic material such as steel or iron. l/Vithin and supported by this shell is a magnet spool 2.

Spool 2 comprises a central magnetic core 3 and two insulatin non-magnetic heads d. Fiber may be used or these heads) .hn energizing winding 5 is wound about core 3 between heads 4, The heads are held in Serial No. 498,120.

place upon core 3 by indenting or upsetting portions of the core to form small projecting spurs 6 against which the heads abut.

The inner end of core 3 is drilled and internally threaded for an assembling screw 7. The back wall 0f shell 1 has openings therethrough for the passage of screw 7 and the leads to the magnet winding.

Su erposed insulating blocks 8 and 9, of suita le material suchl as liber, are supported upon the top of shell 1. Block 8 has a pair of tapering sided grooves 10 in its top surface and in the bottom of each groove is a hole 11 which is countersunk at its lower end. A sharp pointed terminal 12 extends upwardly through each hole 11. lhese terminals may be ordinary tacks, the heads of which lie in the countersunlr lower ends of holes 11. The terminals are long enough to extend a short distance above the bottoms of grooves 10.

rlhe ,leads to the magnet winding are soldered to the enlarged lower ends of terminals 12. Block 9 may be grooved in its upper surface to accommodate these leads. A pair of screws 13, passing through blocks 8 and 9 and threading into the top of shell 1. serve to hold the blocks to the shell and clamp the terminals in position with the points thereof extending slightly above the bottoms of grooves 10.

A small ber cleat 14 is secured to block 8 by screws 15. Cleat 111 has its under surface provided with a pair of small ridges or tongues 16 which register with grooves 10 in block 8. A hole 17 in each tongue lies above the point of the corresponding terminal 12.

A U shaped clip 18, which serves as an appliance holder is secured upon the top of block 8 by screw 7. rllhe adjustment of the clip prongs may be varied by a screw 19. Screw 7 therefore holds the clip, shell and spool together.

Clip 18 serves to detachably support a portable electrical appliance such as the portable automobile trouble lamp 20. Such lamps are well known and usually have a suitable handle 21 carryin a lamp socket 22 and a lamp guard 23. gllhe lamp is fed through conductors 2t of an extension cord which passes through handle 21.

To use the device the insulation covered conducting leads ot 'the extension cord of the portable appliances are inserted under cleat 14 in grooves 10 and screws 15 are tightened. The cleat forces the leads down upon mit mit

the points of terminals 12 which penetrate the msulation and make contact with the conductors therein, as shown in Fig. 4. The circuit to the appliance is thus tapped and the magnet winding is connected therein in parallel with the appliance. n

The handle of the appliance is inserted 1n clip 18 and, because of the attraction or the energized magnet, may be held 1n position on any magnetic substance.

When it is desired to use the lamp without the ma etic fixture the handle can be removed rom the holder and the conducting leads released from cleat 14.

The small sharp points of the terminals, although they penetrate the cord and contact with the stranded conductors therein, do not materially aiect the insulation so that the appliance with which the fixture is used is not injuredo The insulation is readily pierced so that it is unnecessary to remove or cut any part of the same andvconnection may be quickly made by the use of a screw driver only.

Although the fixture has been explained as applied to a trouble lamp it may be employed with many other electrical appliances, such for example, as plugs, receptacles, sockets, soldering irons, etc.

Having described my invention what I claim as new and desire to secure by Letters Patent, is Y 1. A magnetic structure ,for supporting an electric hand lamp comprising a magnetic shell; a magnetizing coil therein; a hand lamp having a handle; a clip on the shell to clasp and hold the handle; a duplex cord wire for connecting the lamp to a source of current supply; sharp pointed terminals for the ma etizing coil mounted on said shell and aA apted to pierce the insulation of t-he'duplex wire for connecting said coil and lamp in parallel circuit and a clamp member havlng ollow projections overlying said pointed terminals. l

2. The combination with a magnetic xture of a detachable appliance therefore, said appliance being adapted to receive current through an extension cord, a magentizing base for said xture, a spring clip for clamping and holding` said appliance, and pointed terminals on said base adapted to engage and hold the extension cord and pierce the insulation thereof to make electrical contact with the enclosed wires for supplying the base with magnetizing 4curren 3. A magnetic fixture for holding a portable electrical appliance which rece1ves current'through an extension cord, comprising an outer shell, an inner core spaced from the shell, an energizing winding located between the core and shell, a holder mounted on the shell and adapted to detachably support the appliance, terminals mounted on the shell and connected to the winding, and means for clamping the cord to the shell and causing the terminals to electrically engage the same to connect the winding in circuit with the appliance.

In testimony whereof I hereunto subscribe my name.

FREDERICK B. LITTLE,

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