US1550375A - Lamp structure - Google Patents

Description

Aug. 18, 1925. 1,550,375

w. LOHRER LAMP STRUCTURE Filed March 5. 1925 Patented Aug. 18, I 1925.

UNITEDTSTATES wILLrAM LonR-ER, or RIVER roRnsT, ILLINOIS.-

LAMP s'rRuc'ruRn.

Application filed- March 5, 1925. Serial no. 13,250.

To all whom z'tmay concern: 7

Be it known that I, VILLIADILOHRER, a citizen of the United States, residing at 122 Keystone Avenue, River Forest, in the county of Cook and State of Illinois,have

invented a new and useful lmproven'ient in Lamp Structures, of which the following is a specification.

My primary objects areto provide a lamp 1O structur of such construction that when displaced out of normal upstanding position, as by a blow against it, it will automatically return to upright position; to provide a structure of such. construction that it may be supported upon an area of relatively small extent; and other objects as will be manifest from the following description.

Referring to the accompanying drawing:

Figure 1 is a view in elevation, with the lower portion thereof sectioned, of a lamp structure embodying my invention; and Figure 2 a section taken at the line 22 on Fig. 1, and viewed in the direction of the arrows.

The lamp structure shown comprises a base portion 3 preferably of general spheri-' cal form, as shown, at which the structure is adapted to be rockably supported, this 30 base portion being preferably made, as a solid structure, of metal, provided about its upper edge with an outwardly extending annular flange 4E, and with its upper surface recessed as represented at 5.

Surmounting the portion 3 is a plate 6 shown as circular, which extends entirely across the top surface of the member 3 and is rigidly secured to the latter, as by turning the peripheral edge of the plate 6 into interlocking engagement with the flange 4, as shown at 7. V

Rigidly secured to the central portion of the plate 6, and rising therefrom, is a hollow stem 8 terminating at its upper end in one section 9, shown as of substantially semi-spherical hollow form, of a pivoting joint, the other section of which, represented at and of the same shape as the section 9, fiatwise opposes the latter, the opposing surfaces of the sections 9 and 10 being preferably serrated, as represented at 11, to provide intermeshing teeth. The sections 9 and 10 are adapted to be releasably held together in adjusted position by a clamping device comprising a stud portion 12'which extends through both of the sections 9 and 10 and at its head 13 against the outer surface of the section 10, and a clamping knob 12 screwed upon the opposite, protruding, end of the stud 12.

The section 10 is provided with a tubular portion 1 1 extending above the pivoting joint referred to and in which an electric light socket 15, shown as equipped with switch mechanism, the operating element of which is represented at 16, is secured.

The electric-current-conducting wires for supplying current to the socket 15, extend through a bushing-equipped opening 17 in the plate 6 to one side of the center thereof and thence lead upwardly through the stem 8, the interior of the pivoting joint, and the portion 1a to the contacts (not shown) of the socket 15.

It will be understood from the foregoing that the center of gravity of the entire structure is close to the extreme lower surface thereof, and by providing the base 3 with a curved surface, preferably of general spherical shape as stated and shown, at

which surface the structure rests upon a support, the structure is adapted to automatically return to upright position, when rocked at its base upon the support, as for example, should a person strike the lamp structure, the projecting rim portion formed by the portion 7 of the plate, serving as a stop to prevent the lamp structure from being rocked sufiiciently far as to cause the lamp located in the socket 15 to strike the support on which the lamp structure rests.

In addition to presenting the advantageous feature as above set forth, the structure presents the advantage that it may be placed upon a support presenting a relatively small area, inasmuch as the contact of the base 3 with the support, is approximately a point contact. This adapts'the lamp structure for support upon surfaces which could not possibly be used for sup porting a lamp structure of the nonrocking type such as commonly provided. This is not only of advantage in the use of the lamp for reading purposes, but is also of advantage where the lamp is to be used by a workman at a bench where it may be required that the lamp be set upon a surface of relatively small area, or set upon articles which present uneven seating surfaces. Furthermore, the provision of the lamp structure as described permits it to be carelessly slid, or pulled, along a surface, even though such surface be comparatively rough, without danger of permanently upsetting the lamp structure, and in general, practically no attention need be given to the kind or character of the support to which the lamp structure is applied.

The feature or pivotally mounting the lamp socket 15, as shown and described, is of advantage inasmuch as the socket may be adjusted in a vertical plane into different angular positions, without impairing the capability of the structure to automatically re turn to normal upright position when tilted out of such position.

While I have illustrated and described a particular construction embodying my invention, I do not wish to be understood as limiting it thereto, as the same may be variously modified and altered Without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is:

A lamp comprising a solid base having a portion of general spherical form at which it is adapted to be rockably supported, said base having a laterally extending flange at its upper edge, the upper surface of said base being recessed, a plate extending across the top of said base and interlocked With said flange, a hollow stem rising from said plate, an electric socket, means pivotally connecting said socket to the upper end of said stem, and current conducting means extending through said plate and into said recess and upwardly through said stem to said socket.

WVILLIAM LOHRER.

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