US1829127A - Lamp socket - Google Patents

Description

H. CAMMACK Get. 27, 1931.

LAMP SOCKET Filed Dec. 7, 1927 I HVEHTOE. /7 0/dC Cam/7240A Patented Oct. 27, 1931 HORACE Gammon, or sr. LOUIS, MISSOURI LAMP SOCKET Application filed December 7, 1927. Serial No. 238,409.

My invention relates to electric lamp sockets and their mounting and consists in a novel housing or case for enclosing the metal socket, into which the lamp is inserted,

' also enclosing the base on which the socket is mounted and including means for attaching the case to a cord or cable leading to the socket.

Y My invention is particularly adapted for m use around shops, garages, etc,., where it is customary to have a lamp mounted on the end of a cord so that it may be handled conveniently-in connection with work being per.- formed.

is The main object of my invention is to provide a mounting for the socket which will completely insulate the latter and avoid the likelihood of danger to users because of shock caused by direct contact withthe-metal portion of the socket or because of contact through a metal tool or other conductor.

Another object of my invention is to provide a housing for the socket and its base which may be readily assembled with and 2 disassembled from-the same so that the socket base and housing may the easily attached :to the cable.

Another object of my invention is to mount the socket base on an insulated cable in such manner that the lamp may be handled freely and the device pulled around promiscuously without any tension being placed upon the wiring stripped of insulation forattachment to the base.

In the accompanying drawings which illustrate my invention -Figure l-is, in part, a side elevation of my casing and, in part, a section therethrough showing the socket "base and elements mounting the same in the casing.

Figure-2 is a similar-viewshowing a modified structure.

Figure 3 is a transverse section taken substantially on line 3-3 of Figure 1.

Figure 4 is a-topyiew illustratinga detail of my device.

Figuret is a view showing the partsof my device separated.

The metal socket Land the base 2 on which .50 it is mounted, mayberof any ordinary construction and typical elements are indicated, and it will be understood that they are provided with mounting screws and contact points in the usual manner. The base 2 has a shoulder 3, as is customary in devicesof this type.

My casingconsists of a hollow cylindrical member 4 formed of fibre, vulcanized rubber, or other insulating material and provided, on its interior surface, with an upwardly facing shoulder element 5 adapted to support the base 2 by engagement with the downwardly facing shoulder 3 on the latter. I show a cable 6 of well known construction and consisting of conducting wires 7 and reenforcing cords 8 embedded in and surrounded by a solid mass of rubber 9. I provide a collar 10 of rubber, or other yielding material,

about cable '6 and above this collar I apply washer 11 and is supported upon a second shoulder 13 provided on the inner surface of housing 4 adjacent the upper end of collar 10. A spring clip, such as indicated at 14, is detachably mounted in suitable openings provided in the wall of the casing and preferably the wall is undercut, as indicated at 15, so that the clip may be distorted, as shown in Figure 4, to be held in the position illustrated.

-By forcing clip 14: out of the depression '15 and compressing its ends, it may be removedfrom the casing, whereupon washer 12, cable -6, washer 13, collar 10, the socket base 2, and the socket 1 may all be easily removed from the casing.

hen the parts are assembled with the casing, the socket base is positively held against movement downwardly by its engagement with shoulder element 5 and it is held against movement upwardly by means comprising collar 10, washers 11 and 12, and clip 14. Any pull produced by the operator tugging a thin washer 11 of fibre .or other material 10 sufficiently rigid for the purpose. The diameter of the opening in washer 11 is slightly less than the outside diameter of cable 6 so that the elastic material of the latter must be slightly compressed at the point where it is surrounded by washer 11.

A heavy rigid washer 12 is applied above spaced from the place where the insulation is stripped from the wires to prevent the separation of the latter and their attachment to the terminals on the base.

The device shown in Figure 2 is substantially the same in construction but is pro vided' with an elongated housing 17 to facilitate handling under some circumstances, and requires a longer collar 18 corresponding to collar 10 for spacing the plug 19 from. the washer 20.

I illustrate my device as being provided with a snap switch operated by buttons 21 projecting through the sides of the case 2 and 17. They may be applied to the switch member 22 by being screwed ontoand off of the same. By this arrangement, the base provided with a switch ofthis type may be inserted in the-case and the switch buttons 21 then applied to the portions of the switch assembled with the base. 7 Preferably recesses 23 are provided on th exterior surface of the case for the attachment of shades or guards, or the like, and it will be understood that these elements form no part of my invention, and the lamp may be used with or without them.

Obviously, the details of my invention may be modified without departing from the spirit thereof, and I contemplate the exclusive use of such variations as come within the scope of myclaims. r

I claim:

1. In a case for engaging an electric lamp socket and its base, longitudinally spaced shoulders on the inner surface of the case and facing one end of the latter, one of said shoulders being adapted'to engage adownwardly. facing surface on a socket base, means for gripping an insulation cable, an element above sald means and engaging the latter and the other of said shoulders, and means detachably engaging the case wall near said end of the case for engaging the other side of said element. v i

2. In a case for engaging an electric lamp socket and its base, longitudinally spaced shoulders on the inner surface of the case andfacing one end of'the latter, one of said shoulders being adapted to engage a' downwardly facing surface on a socket base, means for grlppmg an lnsulation cable, an element I above said means and engaging the latter and the other of said shoulders, detachable means near said end of the case for engaging the other side of said element, and means for preventing rotation of said base in said'case.

3. In combination, a hollow cylindrical case of insulating material, an electric lamp socket base in said case and held against downward movement therein, wires secured to said base and covered with insulation of yielding material, a collar above said base and surrounding said insulation, a thin washer above said collar tightly fitting said insulation, a rigid member above said thin washer, and readily detachable elements positively securing said member to said case.

4. In combination, a hollow cylindrical rigid case of insulating material and having an upwardly facin shoulder on its inner surface,'an electric'lamp socket base in said case and having a downwardly facing shoulder resting on said case shoulder, wiring for said socket attached to saidbase and covered with insulation of yieldingmaterial, a collar surrounding said wiring and insulation above said base, a thin washertightly engaging said insulation above said'collar, a second shoulder on the'inner periphery ofsaid case adjacent to said washer and of larger diameterthan said first mentioned shoulder, a rigid washer above said thin washer'and surrounding said insulation' and resting on said second shoulder, and an element engaging the outer face of said rigid washer and removably attached to said case.

5. In combination, a hollow one-piece openended case ofinsulating material, a shoulder on the inner surface of said case facing one end thereof, an electric lamp socket base seated on said shoulder, the outside diameter of saidbase being less than the inside diam eter of said case between said shoulder and said end, a second shoulder on the inner surface of said case facing said end and nearer thereto than said first-mentioned shoulder, a base engaging collar, a member engaging said collar and resting onsaid second-mentioned shoulder, and elements detachably secured to 'ing material-adaptedto receive an electric lamp "socket base through its upper end, there being a vertically extending shoulder on the inner wall of said case for engaging a noncircular portion of said base to prevent rotation thereof, there being a horizontal shoulder on the inner. wall of said case facing said upper end for engaging the lower face of said base to support the same, there being a second shoulder on the inner wall of the case and nearer said end than said first-mentioned shoulder, a washer spaced from said upper end of said case and resting on said second-mentioned shoulder, and an element holding said Washer and case in assembled relation.

7 As a new article of manufacture, a hollow one-piece open-ended case of insulating material adapted to receive an electric lamp socket base through its upper end, there being a horizontal shoulder on the inner Wall of said case facing said upper end for engaging the lower face of said base to support the same, there being a second shoulder on the inner wall of the case and nearer said end than said first-mentioned shoulder, a Washer spaced from said upper end of said case and resting on said second-mentioned shoulder, and an element holding said Washer and case in assembled relation.

In testimony whereof I hereunto aflix my signature this 30th day of November, 1927. HORACE GAMMAOK.

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