US1644767A - Electrical plug - Google Patents

Description

Oct.- -11, 1927. 1,644,767

H. J. ZIMMERMANN ELECTRICAL PLUG Filed May 22 1922 I I? 77 %1zyen o Patented Qct. 11,1927.

na ran stares renter rarest m ss.

HANS J. zriwiiannntsnn, or CLEVELAND, OHIO, gestation Tov ELLIOTT w. n'nrntnn.

measures, or nLYaIA, ()HIO.

ELECTRICAL rnne.

Application filed May 22,

The present invention relates to an elec trical plug which is adapted to connect con; ducting wires to an electrical socket such as a lamp socket, basereceptacle, or other similar device in which the conducting wires are to be connected.

In the usual forms of electrical plugs with which I am familiar which are adapted for connection with a threaded socket, the plug itself is threaded and when the same is attached to a threaded socket it is necessary to screw the plug into the socket to obtain the electrical connection. I I

In the present form of socket the same may be secured to a threaded socket by merely pushing the plug into the socket where it will be retained, all this being accomplished without the necessity of any turning or screwing action whatsoever.

Reference should be had to the accompanying drawings forming a part of this specification, in which'Fig. 1 is an elevation of the plug with certain portions broken away Fig. 2 is an elevation of the plug taken at right angles to that shown in Fig. 1. Fig. 3 is a top plan view of the plug. Fig. 1 is an elevation with portions in section of the plug with the outer casing removed. Fig. 5 is a top plan view of the showing in Fig. 1.] Fig. 6 is an elevation of a portion of the device with certain parts omitted. Fig. 7 "is a section which is taken on the line' 7'-'-7 and 7 4 of Fig. 4:.

The device, comprises a body portion 1 which has a base 2 with upstanding side members 3 and 4: and these side members at their upper ends are connected with a head portion 5. Through the head portion there extends a conducting rod 6 which has a head 7 that is upon the outside and at the top of the member 6, and this rod at its lower end is threaded for receiving a nut 8 which when tightened against the under side of the head 7 holds the rod 6 in place. There is also another nut 9 threaded upon the rod 6 and between the rods 8 and 9 there may be secured one end of a conductor 10 which at its opposite ends is secured .to a binding post 11 which post has portion 11 that extends through the base 2, and beyond the base the portion 11 is threaded to receive the nuts 11 and 11 the nut 11 serving to hold the. portion 11 within the base and the nut- 11 serving to secure one end o a conductor12.

1922. Serial No. 562,628.

faces of the members 3"and 4:, so that'in as I sembled condition the outer surfaces of the members 3', 4, 14 and 15, are essentially cylindrical in form. A spring member which has a portion thereof coiled to form an eye 16 and arm members 16 and 16, is mounted so that the eye portions sur rounds the pin 13 and the arms 16 and 16 engage with the inner surfaceofthe pivoted members 15 and 14 respectively, normally urging these members outwardly into the position shown in Fig. 4:. 1 y

There is a binding post 17 which has'a portion extendingthrough the base :2, and at its outer-end is provided with nuts 17 and 17 which is similar in construction and function to the binding post 11 and the parts associated therewith. Co-operating with the head of thebindi ng post 17 there are one or more leaves or strips 18 which bear against the pivoted member 15. These strips being of conducting; material andthe member 15 bein'gof conducting metal', form an electrical con nection between the binding post 17 and the pivoted member 15.

The members 14 and 15 at their outer ends are provided with members 15 and 1 1 which may be describedas jaws, and each of these members upon the outer surface thereof is provided with portions of threads as indicated at 14t and 15". I

It should be noted that the base 2 ant the upstanding side members 3 and 4 and the head. 5 are formed of some material which is nonconducting, and the connecting wire 10 which ,connectsthe binding post 11 with the rod 6 is carefully insulated.

The structure which has just been described is adapted to be mounted within a casing 20 which is preferably made of insulating material. This casing is closed at its lower end except for anopening through which the conductors from the outside may" extend. The casing and the structure within the same may be connected to each other to avoid displacement by means of a short screw 21 which extends through a suitable opening in the casing 20, and has the threaded end thereof within a threaded opening in the base 2, indicated at 22.

The upper portions of the upstanding members 3 and 4 have outwardly extending flanges or ledges 3 and 4 which are rounded and are of a diameter to snugly fit within the casing 20.

It willbe noted that the outer ends of the jaws 144 and 15 are champfered or rounded as indicated at 15 and 14.

, The spring arms 16 and 16 normally urge the pivoted members 14 and 15 outwardly, and when the casing 20 is in place as indicated in Figs. 1 and2 these pivoted arms are pushed outwardly and against the inner wall of the casing 20. I

It will be noted that the ends of the jaw members 145 and15' are slightly champfered or rounded at their ends as indicated at 14 and 15 and therefore, when the jaws are presented to the open end of a threaded socket, the jaws may be pushed inwardly by a straight motion, the resiliency of the spring arms 16 and 16 permitting inward movement of the jaws 14 and 15 during this pushing in. movement.- The plug is pushed into a socket as far as it will go at which time the member 7 Will engage with the central electrode which is universally used in sockets, while the jaw members will be in engagement with the inner threaded conducting. shell which is always found in sockets. This will form the electrical connection between the conductors attached to the plug and the socket.

i It will be noted that the ends of the jaws 14 and 15 are of suchlength that they -,can not contact with the conductor member 7,;but in their mostinward position they will contact w1th the upper portion of the signature.

member 6 which as before stated is formed of insulating material.

If it be found desirable to provide a means of manipulating or operating the pivoted the button extending through a hole or opening inthe casing which is of sutficient size to permit thebody portion to pass but retain the head upon the inside of the casing. The heads of the'buttonmembers 23 and 24 ill bear against the pivoted members 14 and 15 respectively, and when the button members are depressed they will movethe pivoted members 14 and 15 inwardly thereby moving the aw members inwardly, thus permitting ready insertion in a socket.

I claim: I Y An electrical connecting plug comprising a body portion of insulating material having a base portion and spaced side portions extending from the base, a central electrode mounted between the outer ends of the side members, a pair of jaws oi conducting material pivotally connected between the side members, terminal members on the base connected to the electrode and jaws, a casing enclosing the body portion and a portion of the jaws, the outer end of the jaws projecting beyond the end of thecasing and having retaining portions adapted toengage in a socket, resilient means normally urging the jaws apart and push buttons projecting through the wall of the casing by means of which the jaws may be actuated in opposition to the yielding means.

In testimony whereof, I hereunto aflix my HANS J. ZIMMERMANN.

Images