US2085207A - Mechanical mounting for lamp bulbs - Google Patents

Description

June 29, 1937. I ABRAM'SQN I 2,085,207

MECHANICAL MOUNTING FOR LAMP BULBS Filed May 9, 1935 INVENTOR flbrah am ibrams 0/7 ATTORN EYS Patented June 29, 193? UNHTEE fi'lATES image? FATENE @FFiCi-Z MECHANICAL BIQUNTING FOR LAMP BULBS Application May 9, 1935, Serial No. 20,562

6 Claims.

This invention relates to lamp mountings and more particularly to mountings for incandescent lamp bulbs.

In certain types of Christmas tree ornaments an incandescent lamp is mounted in the body of the ornament with the threaded stem of the lamp projecting therefrom for reception in a lamp socket. If the body of the ornament is made of metal, or other conducting material, it is necessary to provide a mounting whereby the stem is insulated from the body. The present invention is directed to a lamp mounting particularly adapted for this purpose although it is capable of use in many other constructions.

In carrying out my invention I provide the body of the lamp or other device with an opening to receive an insulating washer or lamp support. The stem of the lamp passes through an opening in the lamp support. The opening in the body of the ornament and the lamp support are shaped to prevent relative rotation of these members when the lamp support is in position and the stem of the lamp bulb is locked to the lamp support to prevent rotation of the lamp in the support.

In the accompanying drawing I have shown several embodiments of the invention. In the drawing:

Fig. l is a vertical sectional view of a Christmas tree ornament showing one form of the invention;

Fig. 2 is a plan view of the lamp support;

Fig. 3 is a similar view of an insulating washer used in conjunction therewith;

Fig. 4 is a plan View of a washer or plate car- 5 rie-d by the lamp bulb;

Fig. 5 is a vertical, sectional view of another 1 form of the invention;

Fig. 6 is a plan View of the lamp support;

Fig. '7 is a side elevation thereof;

Fig. 8 is a plan view of a metal plate or Washer carried by the lamp bulb; and

Fig. 9 is a side elevation of a lamp bulb showing the plate or washer of Fig. 8 in position thereon.

Referring to Figs. 1 to 4 of the drawing I have there illustrated a Christmas tree ornament consisting of a bell shaped member I having suitable ornamental openings 2 through which light may pass. The lamp bulb mounting forming the subject matter of the present invention consists of a recess or depression 3 in the end of the body of the ornament which recess or depression is circular to receive the circular body portion G of the lamp bulb support shown in Fig. 2 of the drawing. The bottom of the depression is provided with a square opening adapted to receive a projecting portion 5 formed on the face of the lamp bulb support and adapted to pass through this opening. It will be apparent that when the body 5 of the lamp bulb support is arranged in the recess or depression 3 with the square projecting portion 4 extending through the square opening in the bottom of the recess that the lamp bulb support is incapable of rotational movement with respect to the body of the ornament. A washer 6 (see Fig. 3) having asquare opening l is insorted in the body of the ornament from the opposite end and arranged over the projecting portion l of the lamp bulb support as shown in Fig. l of the drawing. The end of the ornament is closed by a plate 8 which is held in position by lugs 9 projecting from the body and this plate may be inserted after the lamp bulb has been assembled. A lamp consisting of a bulb l3 and a specially long threaded stem H which is necessary to be used with the construction herein disclosed, is inserted in the ornament from the open end. This bulb carries a plate i2 having a plurality of upwardly extending flanges l3.

In assembling the device with the plate 8 removed the lamp bulb support is first placed in the recess 3. The lamp bulb support is provided with a circular threaded opening i l adapted to receive the threads on the stem ll of the lamp bulb. .The washer 6 is inserted from the opposite end and the opening therein receives the projection 5 of the lamp bulb support which extends through the opening in the bottom of the recess. The bulb is then inserted and threaded through the opening i i of the lamp bulb support. The flanges 53 bear on the washer 6 causing the washer G and the lamp bulb support 4 to be drawn against the bottom of the recess 3 when the bulb is tightened in the socket. To prevent the bulb from rotating in the socket a metal ring l5 may be screwed on to the projecting portion of the threaded stem, after the parts have been assembled and secured in position by solder it. With the parts so assembled, the plate d is arranged on the open end of the body of the ornament and the lugs 9 secured over it.

In the form of the invention shown in Fig. 5 of the drawing I provide an ornament consisting of a body portion ll. In this form of the invention the lamp bulb is adapted to be assembled in its support and then inserted in position. As shown, the body of the ornament is provided with a recess I8, which is circular in shape and which is provided with a square opening large enough in diameter to permit the lamp bulb H] to pass through it. The lamp bulb support consists of a circular plate or disc IQ of insulating material (see Figs. 6 and '7) having a projecting portion '20 on its inward surface which is square in cross section and is adapted to pass through the square opening in the bottom of the recess I 8 to secure the member l9 against rotation in the body of the ornament. The outer surface of the projection 2t is formed into a plurality of faces 2! arranged in different planes forming ratchet teeth 22 at the junction of these faces. A plate 23 is secured to the stem of the lamp bulb and this plate is provided with a plurality of radial slits forming teeth 24 which are adapted to engage the ratchet teeth 22 to prevent rotation of the lamp bulb in a reverse direction. In this form of the invention the lamp bulb is first arranged in the lamp bulb support i 9. As shown, the lamp bulb support is provided with a circular threaded opening '25 adapted to receive the threaded stem of the bulb. The bulb is screwed into the support and reverse movement of the bulb is prevented by engagement of the teeth 22 and the teeth 2A. The device is then inserted in the ornament and the projection of the portion 20 of the lamp bulb support through the square opening in the bottom of the recess l8 prevents rotation of the lamp bulb holder after it has been inserted in the ornament. It is secured in position by means of a plurality of tabs or projections 28 formed on the body of the ornament and adapted to be secured over the outer face of the lamp bulb holder.

Either form of the invention provides a relatively simple means for securing a lamp bulb in a Christmas tree ornament or other device from which it must be insulated with the bulb arranged inside the body of the ornament and the stem projecting therefrom to be secured in a suitable lamp socket. In each form of the device the lamp bulb holder is locked against rotation by the arrangement of the projecting portion in the square opening at the bottom of the recess in the body of the ornament. The bulb is likewise locked against rotation in the holder by the means shown in each form of the invention. While the openings in the ornament through which portions of the lamp bulb holders project have been described as being square in cross section it will be apparent that they may be of any shape other than circular and may be received in openings of the same shape whereby rotation of the lamp bulb holder in the ornament is prevented. It will also be apparent that various modifications may be made in the details of construction herein disclosed without departing from the spirit of the invention.

I claim:

1. A lamp bulb mounting unit including a casing member having a recess and an opening covering 360 in said recess, a bulb holder of insulating material wholly mounted within said recess, and having a portion projecting through said opening Within the casing member, means for retaining said holder in said recess, said holder having an opening therein smaller than the bulb and a lamp bulb having an extra long stem mounted in said holder so a part of the stem is within the holder and the remainder projecting therefrom to the approximate length of a standard bulb of the type herein described, the projecting end of the stem serving to mount the unit into a current supply socket.

2. A lamp bulb mounting unit comprising a casing member having an inturned recess and having a non-circular opening covering 360 in said recess, a bulb holder mounted in said recess having a portion shaped to fit said opening and projecting into said opening to secure said bulb holder against rotation, means for retaining said bulb holder in said recess, said bulb holder hav ing an opening therein and a lamp bulb mounted by its stem in said holder, the stem of the bulb being of extra length with a part located within the holder, and the remainder projecting from said member so the unit may be screwed into a current supply unit.

3. A lamp bulb mounting unit comprising a member having a recess and having an opening in said recess, a bulb holder mounted in said recess and having a portion projecting through said opening, a Washer arranged on the opposite side of said member having an opening to receive said projecting portion, said bulb holder having an opening, a bulb mounted in said opening, and means carried by said bul and engaging said washer to retain said washer and said holder in engagement with opposite sides of said member.

4. A lamp bulb mounting unit comprising a member having a recess and having a non-circular opening in said recess, a bulb holder mounted in said recess and having a portion shaped to fit said opening and projecting into said opening to secure said bulb holder against rotation, the faces of said projection being provided with a pinrality of teeth, said bulb holder being provided with an opening, a bulb mounted therein, and a plate carried by the bulb having teeth adapted to engage the teeth on the face of said projection to prevent removal of said bulb from said bulb holder, and means for retaining said bulb holder in said recess.

5. A lamp bulb mounting unit comprising a member having a recess and having a non-circular opening in said recess, a bulb holder mounted in said recess and having a portion shaped to fit said opening and projecting into said opening to secure said bulb holder against rotation, said bulb holder being provided with an opening, a lamp bulb mounted in said opening, cooperating means on said bulb and the face of said projecting portion of said holder to prevent rotation of said bulb in said holder, and means for retaining said holder in said recess.

6. A Christmas tree ornamental unit comprising a body of opaque material having openings therein arranged over the surface of the body through which light may pass, a lamp bulb mounted in said body and having an extra long threaded stem of uniform diameter with a part located within the body and a part projecting therefrom, and means for mounting said bulb in said body, said means comprising an inwardly extending recess formed in said body and having an opening covering 360 therein, a bulb holder lying wholly within the recess and having an opening for the reception of the threaded stem of said bulb arranged in said recess and having said projecting part of the stem extending through said openingto the length of a bulb standard for the purpose described, and means for retaining said bulb holder in said recess thereby completing a unit which can be screwed into a current supply socket.

ABRAHAM ABRAMSON.

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