US1930927A

US1930927A - Electrical fitting

Info

Publication number: US1930927A
Application number: US599447A
Authority: US
Inventors: Leroy C Doane
Original assignee: Miller Co
Current assignee: Miller Co
Priority date: 1932-03-17
Filing date: 1932-03-17
Publication date: 1933-10-17
Anticipated expiration: 1950-10-17

Description

Oct. 17, 1933. I Q DOANE 1,930,927

ELECTRICAL FITTING Filed March 1'7, 1932 v INVENTOR Ze/g Cflaa/re. BY

mmmm/ ATTORNEY Patented Got. 17, 1933 PATENT @FFEQE ELECTRICAL FITTING Leroy C. Deane, Meriden, Conn, assignor to The Miller Company, Meriden, Conn, a corporation of Connecticut Application March 17,

8 Claims.

The present invention relates to electrical fittings.

The present invention contemplates an arrangement of electrical fittings adapted for use with fixtures and lamps wherein a self-wiring supporting member and a self-wiring coupling member adapted to be secured together and to support between them the socket carrying element of the lamp or fixture. The self-wiring coupling member is provided with externally accessible pins adapted to receive receptacles on the ends of wires which supply the lamp socket or ockets of the lamp or fixture.

Other and further objects of the invention will appear the description proceeds.

The accompanying drawing shows, for pur= poses of illustrating the present invention, one of the many embodiments, with modifications, in which the invention may take form, it being u erstood that the drawing is illustrative of the invention rather than limiting the same. the drawing:

g. 1 is an elevational view of a suspended nting with parts in section and showin dot and dash lines the position of the 1 such an element is shown in the form of a long pendant standard or tube 15. It is proviied with the self-wiring connections as usual. The lower end of the coupling member or tube 15 has a threaded stud indicated in dotted lines at 13, and concentric contacts, not shown, similar to that carried by the fitting 12.

Either the fitting 12 or the lower end of the extension tube 15, may be employed for supporting the other parts of the fixture, A c p i 1932. Serial No. 599,447

member 16, shown in detail in Figs. 2 and 3, is employed to support the fixture. This coupling member has a metal housing 17 counterbored from the lower end to receive insulating and conducting elements to be described.

At the upper end the opening 18 is hexagonal, as shown in Fig. 3. It receives an insulating bushing 19. The insulating bushing 19 receives a metal bushing 20 having a hexagonal flange 21 to fit a hexagonal recess in the bushing 19, so that the metal bushing 20 is not rotatable within the housing 17.

An insulating

unit comprisingthree washers

22, 23, and 24 is also received in the housing 17. These washers carry an'axially disposed pin 25 cooperative with the tubular member 14, and two

insulating pins

26 and 27. The pin 26 is connected with the pin 25 and the pin 27 extends through the three washers and has a head which engages with the metal bushing 20, as shown. An insulating bushing 29 is also received in the housing 17, this bushing having recesses or drillings, 30 and 31 into which the

pins

26 and 27 protrude. The end 32 of the housing 17 is rolled inwardly, as shown, so as to look all these insulating parts in place.

The fittings just described are suitable for use in' self-wiring electrical apparatus having the concentric contact arrangement whenever it is desired to provide protected pins to receive receptacles on the ends of wires. it is also suitable for use as an attaching or securing member where one desires to attach a fixture or lamp part to the support (such as the member 15) having the threadedoonducting stud. Such a fixture or lamp part may be provided with a comparatively thin ring or flange having an aperture {larger than the stud and suitably shaped to keep it out of contact with the stud.

Fig. 1 shows a form of lighting fixture which may be supported from a pendant stem by such a fitting. The structure of the fixture forms the subject matter of the application Serial No. 546,645, filed December 10, 1932.

The fixture employs a stamped or spun body 10 of trough or pan-like shape having an inwardly drawn ring-like element 41 provided with a hole considerably larger than the

stud

13 or 13". The configuration of the stamping is such that it fits closely about the lower end of the stem 15 so as to center the stamping and prevent its coming in contact with the

live stem

13 or 13. The pan is supported in place, as will be obvious by threading the part 16 on to the stud. The 1 1 .1 or "trough-forming member carries a number of depending straps indicated at 42 to which are secured lamp sockets 43 to carry lamp bulbs 44. lhese lamp sockets are connected together by wires indicated at 45 and 46 and the wires are provided with receptacles 47 adapted to be received by the

pins

26 and 27 so that the lamp sockets may be readily wired in without the use of tools.

She pan 40 carries straps 50 having outward extensions 51 to which clips 52 are secured by thumb screws 54. These clips support a glass plate 55.

The employment of the fitting 16 for supporting a lamp bracket having a ring embracing the fitting 16 (instead of the stem 15) is shown in my application Serial No. 570,533, filed October 23, 1931.

It is obvious that the invention may be embodied in many forms and constructions, and I wish it to be understood that the particular forms shown are but a few of the many forms. Various modifications and changes being possible, I do not otherwise limit myself in any way with respect thereto.

I claim:

1. A lighting fixture comprising a pendant support, a downwardly projecting, externally threaded conductor insulatedly carried by the support, an axially disposed insulated conducting tube secured inside the threaded conductor, a lighting fixture body carrying a plurality of lamp sockets together with wiring interconnecting the sockets and receptacles, the body being aperture-d to pass over the first conductor, and a fixture body securing member having an internally threaded conducting bushing to cooperate with the externally threaded conductor and an axially disposed conducting pin to fit the tube, externally accessible pins to receive the receptacles on the wires and connections between the second pins and the two concentric conductors.

2. In a lighting fixture, the combination with a ceiling supported member adapted to support a fixture and supply current connections for the same provided with an insulatedly supported, downwardly projecting, tubular stud externally threaded and with an internally disposed insulated tubular conductor therein, of a fixture body apertured to pass over the stud, a fixture body securing member having an insulatedly supported axial pin within a concentric threaded bushing insulated from the pin, the bushing and pin being cooperative with the stud and tubular conductor respectively, the securing member also having two externally accessible conducting pins, one connected to the first pin and the other to the bushing, lamp sockets carried by the fixture body, and wires interconnecting the sockets with one another and connected to receptacles adapted for insertion into the second mentioned pins.

3. In a li hting appliance, a supporting memaer provided with an insulatedly supported projecting tubular stud externally threaded and with an internally disposed insulated tubular conductor therein, and a coupling member having an insulatedly supported axial pin within a concentric threaded bushing, the bushing and oin being cooperative with the stud and tubular conductor respectively, the coupling member also having two externally accessible pins, one connected with the first pin and the other with the bushing.

i. A lighting appliance comprising a supporting member provided with an insulatedly supported projecting tubular stud externally threaded and with an internally disposed insulated tubular conductor therein, a coupling member having an insulatedly supported axial pin within a concentric threaded bushing, the bushing and pin being cooperative with the stud and tubular conductor respectively, the coupling member also having two externally accessible pins, one connected with the first pin and the other with the bushing, each of the members having a metallic housing, and a lamp socket carrying member having a metallic ring-like element adapted to be placed between the members, and an element out of the plane of the ring-like element for engaging one of the housings to keep the ring-like element out of contact with the stud.

5. A connector comprising a body member, concentric current supply contacts, the external contact being internally threaded and the inner contact being in the form of an axial pin, two output terminals in the form of pins, oneoutput terminal being connected with the external contact, the other output terminal being connected with the inner contact, and means for insulatedly and non-rotatably supporting the terminals and contacts in the body member.

6. A connector comprising a tubular body member having an internal shoulder near one end and being non-circular between the shoulder and adjacent end, a non-circular insulating bushing fitted against the shoulder and received within the non-circular portion of the body, an internally threaded metal bushing non-rotatably received within the insulating bushing, and an insulating insert secured within the body member, said insert carrying an axially disposed pin projecting into the threaded bushing and two oppositely projecting pins, one connected to the first pin and the other in contact with the metallic bushing, and an insulating bushing received in the body member, the bushing having outwardly opening cavities to receive the second mentioned pins.

8. A connector having insulatedly supported concentric contacts one of which is threaded whereby the connector may be secured in conducting relation to a connector having cooperative contacts, and insulatedly supported conducting pins, a tubular housing for the contacts,

pins, and insulating supports, the pins being accessible through the end of the housing opposite the concentric contacts for the attachment of cooperative receptacles.

LEROY C. DOANE.