US1942804A

US1942804A - Lampholder

Info

Publication number: US1942804A
Application number: US588307A
Authority: US
Inventors: Deutsch Fritz
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-01-23
Filing date: 1932-01-23
Publication date: 1934-01-09
Anticipated expiration: 1951-01-09

Description

- F. DEUTSCH Jan. 9, 1934.

LAMPHOLDER Filed Jan. 23, 1932 gums; BY W W C 4 ATTORNEY Patented Jan. 9, 1934 UNITED STATES 1,942,804. LAMPHOLDER Fritz Deutsch, Kreuzlingen, Thurgau,

Switzerland Application January 23, 1932. Serial No. 588,307 4 Claims. (01. 2 i085) I-leretofore there was a great difference in construction between lampholders of the bayonet and the Edison types of glow-lamp sockets. This difference in construction always proved to be a great disadvantage especially with fittings of a better quality, for instance, porcelain fittings for ceilings and walls. In such cases, holder parts designed for one of these types could not be easily replaced or used for parts of the other type.

The following is a description of a preferred embodiment of my invention which entirely removes all of the above-noted difliculties and obstacles. At the same time, the preferred construction embodied herein has advantages hitherto unattained in constructions of either type.

One of the advantages of the present embodiment is that of fastening or attaching the lamp to a ceiling or to walls with screws that are hidden from view. This point will be treated more in detail in connection with the description of the present embodiment.

The primary object of this invention is to obtain a separation of all parts used for the construction of lampholders for ceilings and walls.

With the above object in view, there is conformity of many of the component parts whereby the fitting is adapted for connection with the bayonet and Edison type of sockets. In the present embodiment, the manner of producing contact with the several parts holding the lamp proper must conform to the particular types used in order to be adaptable to the diiferences in both systems.

The invention in its preferred embodiment consists in a new and novel lampholder, in the new and novel features of construction, and the new and original arrangement and combination of parts hereinafter described and more particularly set forth in the appended claims.

In the drawing:-

Figure 1 shows a cross section partly cut away through one form of the embodiment and a cross section of the part of wiring holding unit depending from the ceiling. The latter part contains means providing contacts for the glow-lamp socket of the bayonet type. This is so designed as to diminish the number of the metal fittings required. The part for holding the lamp is shown in a front view, on the left side, whereas the right side gives the sectional view;

Fig. 2 is a cross section of a socket of the Edison type and contacts for the socket taken on line A-A in a vertical plane in Figs. 3 and 4. Part of the depending portion with wire socket to the right of the figure is shown cut away. There is here an entire conformity of view of the parts for holding the lamps, in Figs. 1 and 2, only that the sectional view makes the difference in the appliances for holding the lamps apparent 6 in either system;

Fig. 3 is abottom plan View of the base member in Fig. 2 for holding the end of the wires fromthe ceiling;

' Fig. l is a top plan view of the lower part of 6 the lamp socket adapted for the Edison type.

This is done in order to elucidate, as a result of their construction, the respective positions of the parts when connected; and

Fig. 5 illustrates a schematic modified construction where the same principle and disposition of parts in the above illustrations are applied to an inclined wall lampholder. The same parts of the embodied types above shown are used in Fig. 5 with the exception that the basal supporting members for the lamp and the globe socket and cover are diiferently disposed. Here the parts forming the foundation of the whole construction and the attachments are shown in a side view, whereas the cover is represented in a sectional view.

Similar reference characters designate corresponding parts throughout the drawing.

Referring to the drawing wherein simple and practical embodiments of my invention are shown, 10 is a mechanical supporting plate common to both types. of socket, depending from ceiling l4, and 11 is a recessed block connected to said supporting plate and is made of highly insulating material. Referring to the bayonet type of socket shown in section in Fig. l, the plate 10 and block 11 are provided with a central opening in which an engaging screw 12 and a nut 13 are provided for holding said plate 10 with said block. It is to be noted that block 11 has openings 11 in alignment with openings 11" in plate 10, for accommodating the terminals 14' of a cable, extending from the ceiling. The depending member 13' fitting into the recessed block 11 is provided with oppositely disposed engaging screws 12 for the terminals 14' of the cable, and a pair of spring bushing pins or tongues 29 for making contact with an electric bulb.

It is to be noted that the member 13 is preferably of metal and is contained by the insulation block 11.

It may be noted that the upper parts already described are afiixed to the ceiling or wall 14 and connected with the terminals of the cable so as to be easily reached. A porcelain cover memunited with the lampholder l9,

, conducting parts.

ber 15 used in both types shown in Figs. 1 and 2, has at its lower end an opening 16 to conceal the base of the lamp to be connected and is so designed as to prevent contact with live electric Said cover member when ceiling 14 encloses the mechanical supporting plate 10, block 11 and members 13' to conceal them from view. The upper end of opening 16 contains an interior peripheral shoulder 17 for a ring 18 which is about one-eighth 4;) inch broad and the same in height, and which is adapted to engage a socket member 19 having an externally threaded portion 20. Although the dimensions of the ring 18 are given, it is to be understood that I do not limit myself thereto. Above the peripheral shoulder 17 there is an opening in the cover member 15 sufiiciently large to allow the socket member 19 to be inserted. The socket member 19 although threaded on its outer and lower portion 20, has its interior lower portion either slotted at 19, according to Figure l, to accommodate the projecting pins of a bulb of the bayonet type or internally threaded according to Figure 2, to accommodate a bulb of the threaded Edison type. The outer diameter of the lampholder socket member 19 is smaller than the peripheral shoulder 17 at the end of the opening 16. At the lower end of the lampholder or socket member 19 there is a flangelike extension 21, the diameter of which is somewhat larger than the peripheral shoulder 17, but slightly smaller than the opening 16 of cover member 15. In the peripheral shoulder 17 there are hollows 22 into which the projecting lugs 23 of the socket member 19 enter and are held in rigid position. By this contrivance, the socket member 19 is held immovable in the cover 15, thus permitting the ring 18 to be turned and tightened. In this manner the cover 15 is closely thus forming a it may be hanpushed toward the one-piece attachment so that dled as one part only.

The lampholder or socket upper extension with a member 19 has an portion cut away to form opposite supports 25 with lateral projections. 26

with openings and extending toward the longitudinal axis of the holder. Said projections 26 rest against the mechanical supporting plate 10 and are held in engagement therewith by means of screws 27, projecting upwardly as shown in screws.

Figs. 1 and 2. In order to prevent the screws 27 from falling out of the openings when loose in the projections, I provide small perforated discs 28 which fit tightly against the thread of said, These projections 26, found in every set and opposing each other, leave sufficient space to insert the insulating block 11, the profile of which is made to fit between supports 25 at this point in order to have a proper guide for thelower part. Thus it is possible in the bayonet type of socket to give the lampholder 19 containing the guide slots for the lamp pins theproper position with respect to the spring, bushings 29 of the extension the other hand, screws 27 to screws 27 into the nut holes 30 by means of a screw driver applied from the bottom through the opening in the middle of the supports 25.

Instead of using a socket member as shown in Fig.1, as applied to the bayonettype of lamps or bulbs, a socket member with an internally threaded portion may be used as shown in Fig. 2 for a bulb having a threaded end portion. In either case, it is easy to provide the lampholder having the same general constructional features.

From the foregoing description, it will be noted that I provide an easily replaceable lamp socket, a holder for said socket to conceal the component connecting parts, and means around the socket for retaining the holder and the socket in relative position.

The advantages of lampholders constructed according to my invention are:

Uniformity for a great many parts is present in both forms so that the holder may be used in bayonet as well as in the Edison type of lamps. Such lampholders can be easily applied and attached to wires extending from walls or ceilings. Furthermore, a lampholder made according to my invention is secure in its application and can be made of any shape to accommodate the metal end of a lamp. Furthermore, a lampholder made according to my invention may be of any form, shape or size. Also, its structure may be made of any material, as metal, porcelain, glass, pressed insulation material and formed to suit any requirement.

Furthermore, inclined lampholders as schematically shown in Fig. 5, may be used only with slightly dilferent sockets and covers, whereas the other parts remain the same. Another advantage is that all parts, with the exception of course of the contact members proper, including the various screws for fastening the parts, may be made of pressed insulating material not liable to oxidize, corrode or rust, thus making these lamps especially suitable for places exposed to moisture, such. as bathrooms, toilet rooms and ships, as well as in the open air, all the more, as the few metal fittings, are easily interchangeable.

While I have described preferred embodiments of the invention in connection with the accompanying drawing, it is to be understood that various modifications as to form, size, shape and material may be made without departing from the spirit and scope of the invention.

I claim:

1. A lamp bulbholder for attachment to ceilings, and the like comprising an insulating mechanical supporting plate mounted to said ceiling and having openings therein for the passage of terminals, of an electric conductor therethrough, a recessed insulation block depending from the. supporting plate and having openings in. alignment with, those of the plate, means for engaging said block and plate, a plurality of metal contact pieces mounted in the block in connection with the terminalsof said conductor. for connection with a lamb bulb, a socket member having upwardly extending oppositely disposed spaced supports forming an intermediate space for saidinsulation block, lateral extending oppositely disposed. projections for resting against said supporting, plate, means for engaging said projectionsv with the supporting plate, and a cover member enclosing said, socket member, block and plate.

2. An electric bulb holder device for mounting on ceilings and, the 1ike,,comprising an insulating said openings in connectionwith the terminals and depending from the block for making contact with the metal portion of an electric bulb, means engaging the block with the mechanical supporting plate, a socket member for the electric bulb and having oppositely disposed projecting pieces in connection with the plate, forming an intermediate space for accommodating the block, the exterior surface of said member being threaded and having an externally flanged portion, a cover member for enclosing the socket member, supporting plate and block, having an opening with an inwardly extending peripheral shoulder abutting the flanged portion of the socket member, and an engaging ring around the threaded portion of the socket member for sustaining said covering member in position against the flanged bottom portion of the socket member whereby only said covering member is exposed to view' 3. A holder for electric bulbs comprising an insulating mechanical supporting plate mounted on a ceiling, having openings therein for the terminals of an electric conductor, a block connected with said plate, a metal spring bushing in the block in connection with each of said openings for engagement with said terminals, said bushings lying adjacent each other in the same plane, an insulating lamp holder forming a connection with the bushings and having an exterior peripheral flange at the bottom portion thereof, and a pair of oppositely disposed extensions for engagement with the mechanical supporting plate, said extensions forming an intermediate space for said bushings, an enclosing member for the lampholder, insulating plate, block and bushings having an open, shouldered central portion abutting against the flange of the socket member, and adapted to be brought adjacent the ceiling and enclose said parts from view, annular means intermediate the socket and the enclosing members for retaining them in relative engagement, and fastening means connecting the socket with the supporting plate for forming a unitary construction.

4. In an electric lampholder for ceilings and the like, an insulating mechanical supporting plate mounted to the ceiling, an insulating block connected to the plate, spaced metal members in the block for making contact with the terminals of an electric conductor, and with the lamp, a non-conducting socket member for the lamp having spaced longitudinally extending portions forming an intermediate space, and arms angularly extending from said portions for fitting into the block, said arms having openings, and means passing through the openings of said arms for connecting the socket member to the insulating plate.

FRITZ DEUTSCH.