US1585744A - Shade holder - Google Patents

Description

May 25 1926. 1,585,744

P. VOGT 1 SHADE HOLDER Original Filed Dec. 15, 1921 Paul Va f. 851 his alum/ Patented Wiley 25, 1926?.

PAUL voo'r, OF BADEN, SWITZERLAND.

SHADE HOLDER.

Application filed December 15, 1921, Serial No. 522,669, renewed October 10, 1925, and, in Germany December The invention relates to an improved holder for the shade or globe connected with incandescent electric lamps.

The main object of the invention is to provide for a positive, solid connection be tween the metal socket of the lamp and a substantial insulating holder on the one hand and between the holder and the shade or globe on the other hand.

Another object is to avoid short circuit in attaching the metal shade by insulating the metal connection between the insulating holder and the metal shade and placing it at a considerable distance from the metal socket of the lamp.

Heretofore the holder for the globe generally consisted of a metal ring which con tained the fastenings screw for the shade and which was clamped above a bead or the like provided at the free end of the lamp socket. This connection was more or less shaky, liable 'to get loose, and to allow of a displacement of the globe or shade.

According to this invention the holder for the shade or globe is made of solid insulating material in form of an inverted dish shaped flat ring or circular plate which has in the middle an opening having an upwardly extending flange equipped inside with screw threads fitting upon corresponding screw threads at the free end of the metal socket. The outer rim of the flat ring or plate is shaped as a downwardly extending flange which contains in fitting recesses, embedded between walls of insulating material, the metal bushings for the set screws. The screws for holding the shade are inserted into the metal bushing from the outside through a hole in the outer walls of the recess and protrude through the inner wall of the recess which also has a hole corresponding to the screw-threaded hole in the bushing; the holes in the insulating walls on both sides of the bushing being preferably wider than the screw-threaded hole, so that no pressure is exerted by the set screw immediately upon the insulating material.

The accompanying drawing shows, by way of example, a suitable form in which the invention may be executed. Fig. 1 is a cross section, Fig. 8 is a view from above, Fig. 4 a view from below; Fig. 2 shows a detail and Fig. 5 the armature mounted.

The outwardly extending ring a made of insulating material, for instance porcelain, which forms the main body of the holder, contains in an upwardly extending inner flange screw threads which fit upon corresponding threads at the free end of the metal base or socket of the lamp. This body a has a downwards directed border in which three recesses 01' pockets 0 are provided in distances of 120 degrees one from another. 'lhe border is reinforced outside of said pockets by ledges e which extend over the plain portion of the body a to the inner screw threaded flange. The ledges e and the border are pierced by perforations c l. In each pocket 0 a little metal plate b, Fig. 2, is inserted and conveniently fixed therein by means of a suitable gluten, shellac f. ex. These plates 6 are provided with a female threaded hole for the reception of an attachment screw 8. The perforations d are a little wider than the holes of the plates 6 and therefore do not participate in the guide of the screws 8 set in the plates 6.

In Fig. 1 the nut or plate I) which consists of metal is indicated by cross-section lines which run in a direction different from that of the cross-section lines indicating the section through the ring a made of insulating material. The metal plate or nut 12 which is shown separately in Fig. 9., shows in the center the hole which is to be engaged by the screw S indicated in Fig. 5.

What I claim as myinvention and desire to secure by Letters Patent, is 1- 1. Insulating holder for the shade or globe of electric incandescent lamps consisting of a laterally extending insulating body which has in the center a hole adapted to lit over the end of the lamp socket, and in the downwardly extending outer rim recesses or pockets adapated to receive metal bushings for the screws holding the shade or globe, and in the inner and outer walls of the recesses or pockets, corresponding to the screw threaded hole of the bushing, holes which are a little wider than the hole of the bushing. I

2. Insulating holder for the shade or globe of electric lamps comprising a plateshaped ring, which has in the center a hole adapted to tit over the screw-threaded end IOU of the lamp socket, and at the outer border a downwardly projecting flange having at the points, Where the holding screws for the shade or globe are to be inserted, recesses 01' pockets adapted to receive metal bushings for the holding screws, and in the insulating outer and inner Walls of the recesses or pockets, corresponding to the screw-threaded hole of the metal bushing, holes Which are Wider than the hole of the bushing.

In testimony whereof I afiix my signature.

PAUL VOGT.

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