US2104414A - Electric light fixture - Google Patents

Description

Jan.

W. P. CROCKETT ET AL ELECTRIC LIGHT FIXTURE Filed July 30, 1934 f A il Patented Jan. 4, i935 UNITE. STTES Naald ATE? OFFICE.

ELECTRIC LIGHT FIXTURE Application July 30, 1934, Serial No. 737,500

3 claims.

The invention relates to an electric light fixture, and particularly to a xture which includes a portable lamp which may be detachably held by an adjustable holder which may be clamped to furniture, work benches or other supports.

The invention has a relationship to the electric light fixture invented by us which is the subject matter of United States Mtters Patent No. 1,907,043, issued May 2, 1933.

The principal object of the invention is to provide an electric light fixture which is removably secured to a support and which can be quickly detached to furnish illumination for the user at any particular place or spot desired, and then be readily returned and attached to its support. The invention is therefore particularly applicable for use in hospitals, physicians, surgeons and dentists ofiices where close examinations and explorations are frequently made, and where portability of the light fixture is a necessity.

The xture of the invention is also oi particu--l lar utility in laboratories, studios, garages, on work benches, and in fact in any place where light must be brought close to the person or object to be examined. It will be obvious that the electric light xture may be used as a reading lamp, or desk lamp for use in homes or oflices.

A further object of the invention is to provide the light fixture with means whereby the lamp handle and reflector may be firmly attached to the clamping and supporting portion of the xture and locked into place so that the parts cannot be casually separated or removed from each other, and yet, by properly manipulating the locking mechanism, which is simple and easy to operate, the lamp holder and reflector may be readily detached from the clamping and supporting portion of the xture.

, In connection with the detachable feature of the light xture to enable the lamp to be used as a hand lamp or portable lamp in connection with examinations or explorations, or any special work which may be required involving the removal of the lamp from its support, it is an important object of the invention to be able to quickly and readily lift the lamp from its support and as quickly and readily replace it and lock it in position.

In order to secure the last mentioned advantages the lamp fixture is provided with spaced coacting locking means so that the lamp fixture may be placed at any one of a plurality of positions in the holder of the support and locked into place and the reflector alone can be rotated to its desired position, to direct the light rays where they are desired.

Another object of the invention is to provide a cylindrical casing for the light socket and the end portion of the light cord which will be of strong and unyieldable material, such as steel, to protect the light socket, to furnish a strong and durable support for the light reector, to provide a portion of the detachable locking means and also to provide a handle for the portable lamp so n) that it may be readily grasped, removed from its holder and brought to the place or location for the examination or exploration by the physician, surgeon, dentist, nurse or other person.

It is an object to provide the handle cylinder 1; with bayonet slots turned in a contra-clockwise direction to assist in more rmly locking the handle cylinder and its cap at the time other portions of the handle are rotated in a clockwise direction to secure them in place. 2O

A further object of the invention is to combine a reflector and handle so that by rotation of one of the members, or both, as the case may be, they may be secured in place in order that the direction of the light rays may be controlled.

Another object of the invention is to construct the handle in such a manner that a socket having a pull chain or cord or push buttons for varying the volume of light from the lamp or turning the light on or off may be used. 30

The invention will best be understood by reference to the accompanying drawing wherein the preferred form of electric light iixture and support are shown.

In the drawing: 35

Figure l is an assembly view of the electric light xture employing the spaced co-acting locking means and pull cord for operating the lamp;

Figure 2 is a cross sectional View of the electric light fixture showing the spaced (zo-acting lock- 40 ing mechanism, and showing the handle cylinder, connection with the reflector, end portion of the locking mechanism and connections in section;

Figure 3 is an elevational view of the handle 45 lcylinder of Fig. 2 showing the apertures in the end thereof and through the integral boss and connection with the cord, on the line ll-ll of Fig. 2;

Figure 4 is a view similar to that of Fig. 3 but 50 in addition showing in elevation the locking member of the fixture holder on the line l2--l2 of Fig. 2;

Figure 5 is a cross sectional view of the integral boss shown in elevation in Fig` 3; 55

.- flector.

Figure 6 is a cross sectional view through the handle cylinder on the line |4-l4 of Fig. 1;

Figure '7 is a bottom plan view of the end portion of one or" the members of the handle cylinder shown in Figs. l to 6 inclusive.

Like parts throughout the various views are given the same reference characters.

In the electric light fixture illustrated in Figs. 1 to '1 inclusive, there is shown the clamping and supporting mechanism, generally designated 28, and the cylindrical holder, generally designated 85, which carries the reector 23. The lamp socket 24 is shown in position in the handle and the lamp bulb 25 is in position within the re- The xture is provided with the support tube or rod 28 and the electric light cord 39. The cord 39 has one end thereof secured in the lamp socket 24 and the other end terminates in a plug and light socket.

The electric light iixture is adjustably secured to one end of the tubular rod 28. rIlwo arms 55 and 55a extend from the end of the tube 2S and are rotatably connected with the arms 58 and 59a of the latch holder 51. The four arms are connected together to permit adjustment. A connecting tubing is shown at 58, the screw bolt at 59, and the nut at 69. The latch holder 51 is cut out to form the aperture 51a.

The latch holder 51 having the integral arms 59 and 59a has secured to it by the rivets 63 and 89 the spring latch 85 having the arcuate arms G6 and 51. The holder 51 is provided with two apertures. The locking stud 18 which is riveted to the spring latch 65 extends through one of the apertures. An elongated spring latch button 1| is secured to the lower end of the spring latch 65 and extends through the other aperture of the spring latch holder. The spring latch button is provided with a stop 12.

It will be observed that the spring latch 65 with its arms 66 and 61 is on the interior face of the spring latch holder 51 and extends toward the tube 28 when pressure is exerted on the spring latch button 1|. When the spring latch button 1| is moved to its farthest position through its aperture it moves the end of the spring latch B inwardly and carries with it the attached locking stud 19.

One end of the light cord 30 passes through the exteriorly screw threaded bushing 11 having on its end the hexagonal nut 18. The end of the cord is fastened in the usual manner to the socket 29- and through which current for the lamp 25 is furnished. The screwthreaded bushing i1 is adapted to screw into the cord connecting end 19 of the lamp socket 24. The lamp socket 24 is operated by a pull cord or chain 89 through they cup 84 in the cylindrical holder 85.

The cylindrical holder 85 is composed of the cylindrical portion SB and the cap 81. One end of the cylindrical portion 86 is formed with a U-shaped groove 88 to receive the reector 23. A washer 89 is inserted in the groove between the reector 23 and one wall of the groove. As it is desired that the reector rotate about the end of the cylindrical holder portion 89, and be held in any position to which it may be rotated, a friction fit in the groove is desired and therefore the washer 89 should be of the proper thickness.

At the other end of the cylindrical holder portion 86 bayonet slots 98, preferably four in number, are provided. Each of these bayonet slots has the inner portion 9| of the slot turned in a contra-clockwise direction which is diierent from what is usually the case, to assist in the locking of the cap 81 on the holder portion 86. and also to assist in locking the connections of the cap 81 and the holding ring on the cord 39.

To further assist in the locking of the cap 81 on the cylinder portion 86, the bayonet slots 99 are also provided at the heads of their slot portions 9| with the added material 92 to restrict to some extent the mouth of the passage of the portion of the slot 9|.

The end of the cylinder holder portion 85 containing the bayonet slots 99 is also provided with an `elongated slot 93 between two of the bayonet slots 99 for the sliding into place of the pull chain cup 94 of the socket 24.

The cap 81 of the cylinder holder has its end 94 provided With a central aperture 95 through which the end of the light cord 39 passes to be joined to the socket 24. The end 94 is also provided with the perforations or apertures 9B, preferably four in number, equally spaced apart about the central aperture 95. The holder end 9d is also provided with the squared boss 91. which is formed around the central aperture 95. This squared boss is an integral part of the cap 81 and is formed to provide a squared surface to fit into the aperture 51a of the latch holder 51 as shown in Figs. 2, 3 and 4 of the drawing.

A ring 98 is placed next to the square boss 91 and the sleeve 11, which is provided with the hexagonal nut portion 18, is passed through the ring 98 and the aperture 85. The end of the cord 39 passes through the hexagonal nut 18, sleeve 11, ring 98 and aperture 95. It will be obvious that these last mentioned parts must be placed on the end of the cord 39 before the end is secured in the lamp socket. It will also be obvious that any required number of shims may be placed between the square boss 91 and the ring 98 to permit the insertion in operative position of the light fixture in the spring latch holder 51.

'Ihe end cap 81 of the cylindrical holder is also provided with a plurality of studs or punchings 99, preferably four in number, which are made to register with the four bayonet slots 98 to lock the end cap 81 into place on the cylinder portion 86.

After the end cap 81 has been brought into position at the end of the portion 88 by having the studs or punchings 99 passed into the slots 90 and snapped into place past the added material 92 into the slot portion 9|, the cap 81 will not ordinarily be removed therefrom until repairs are necessary.

In operating the light xture with relation to the fixture or latch holder, the fixture is placed in the latch holder 51 with the squared integral boss 91 in the aperture 51a. The light fixture is placed in position in the latch holder 51 to its limit. By properly placing the boss 91 in the aperture 51a, the stud 10 may be snapped into any one of the apertures 99, in the end 94 of the cap 81, thus locking the light fixture to the latch holder 51. It will be obvious that the apertures 96 will have to be equally placed in position about the boss 91 as shown in Figs. 3 and 4, and it will also be obvious that the light xture may be placed and locked in any one of the four positions permitted by the construction of the four apertures 98 and the four sided boss 91.

When the cylindrical handle cap 81 has been rotated to its normal position with the studs or punchings 99 in their positions in the slot portions 9I, the cap 81 has been rotated in a contraclockwise direction and in a direction opposite to that of the nut 18. The exteriorly threaded bushing 'l1 with the enlarged head or nut 18 is thereupon independently rotated in a clock-wise direction in one end of the light socket 24 to the limit of its movement, thus eifectually locking all of the parts together.

When it is desired to release the light fixture from the extension clamp holder and latch mechanism, pressure on the push button 1I will move the latch spring inwardly and thereby remove the stud 10 out of the particular aperture 96 in which it was placed. The light fixture may then be withdrawn out of aperture 51a and used away from the clamp support in any manner desired. In this-form of structure it will be noted that the xture may be placed in the latch holder in any one of four positions to t any one of the four apertures with reference to the reflector, as the reflector may be rotated to any position desired without reference to the position of the cylindrical handle.

What we claim and desire to secure by Letters Patent is:

1. In an electric light xture of the portable type, a holder, a light socket in said holder, said light socket being provided with a pull chain cup, said holder being adapted to receive one end of a light cord, a holder carrier, a cap removably secured to said holder, said holder having a bayonet slot, and also a slot for said pull chain cup, said cap having a stud or punching, said stud or punching being adapted to enter said bayonet slot and operate in a contra-clockwise direction to lock said cap and said holder, said cap also being provided with an integral square boss, said boss having an aperture for the reception of the light cord, a thimble, said thimble being movable in a clockwise direction, a washer, said cord passing through said thimble, washer and boss into said socket, said holder carrier being cut away to enable said carrier to contact with two side walls of said square boss whereby said holder is held in position in said carrier.

2. In an electric light fixture of the portable type, a holder, a light socket in said holder, said light socket being provided with a pull chain cup, a holder carrier, a cap removably secured to said holder, said holder having a bayonet slot, and also a slot for said pull chain cup, said cap having a square integral boss, said cap also having a stud, said stud being adapted to enter said bayonet slot and rotate in a contra-clockwise direction, a nut with an integral threaded bushing, said bushing extending through said boss and the end of said cap into said light socket, and said nut with its bushing being independently rotated in a clockwise direction in the light socket to the limit of its movement locking all of the parts together, said boss preventing a turning movement of said holder in the holder carrier and permitting the holder to be held against turning in four diierent positions in the holder carrier.

3. In an electric light fixture of the portable type, a holder, a light socket in said holder, said light socket being provided with a pull chain cup, a holder carrier, a cap removably secured to said holder, said holder having a bayonet slot, and also a slot for said pull chain cup, said cap having an angular integral boss, said cap also having a stud, said stud being adapted to enter said bayonet slot and rotate in a contra-clockwise direction, a nut with an integral threaded bushing, said bushing extending through said boss and the end of said Cap into said light socket, and said nut with its bushing being independently rotated in a clock- Wise direction in the light socket to the limit of ,f

its movement locking all of the parts together, said boss preventing a turning movement of said holder in the holder carrier, and permitting the holder to be held against turning in a plurality of positions in the holder carrier.

WILLIAM P. CROCKE'I'I'. WILLIAM P. CROCKE'IT, JR.

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