US2528971A

US2528971A - Fused electric plug

Info

Publication number: US2528971A
Application number: US135700A
Authority: US
Inventors: Philips Raymond
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-12-29
Filing date: 1949-12-29
Publication date: 1950-11-07
Anticipated expiration: 1967-11-07

Description

Nov. 7, 1950 PH|L|P$ 2,528,971

FUSED ELECTRIC PLUG Filed Dec. 29, 1949 INVENTOR. 19A 74/0/70 PHIL/P5 J z/k /M Patented Nov. 7, 1 950 UNITED STATES PAT NT" Raymond Philips, (lleveland, Ohio Application December 29, 1949, Serial No. 135,700

1 Claim.

My invention relates to new and useful improvements in electrical plugs.

One of the Objects of this invention is to provide a device in the form of an electrical plug having a means for connecting the conductors within the plug without the use of screws.

A further object of the invention is to provide a device of the character described having an adapter for holding a standard cartridge fuse of lower amperage than that of the regular house wiring as a safety means.

Another object of this invention is to provide an electrical plug having the safety features as described and a means to maintain the inner ends of the prongs in constant contact with the terminals of the prongs in constant contact with the terminals of the electric circuit wires.

A further object of the invention is to provide an electrical plug, the body of which is provided with a cover part that snaps on and off easily and conveniently.

The foregoing and other objects attainable by the use of the invention will be readily discernible from a reading of the description and a reference to the accompanying drawings, in which:

Fig. 1 is a general perspective view of the invention, or device.

Fig. 2 is a sectional view of the device, lengthwise on a line dividing the device in half and looking at the device elevated on its edge.

Fig. 3 is a view of the front of the body of the device, showing in particular the means for holding the top part securely on the lower part of the body when such top is snapped in place on the lower part of the body.

Referring to the drawings: I and 2 refer to the top and bottom parts, respectively, of the body of the plug, or device, 3 are the electrical circuit wires leading into the body of the device, 4 and 5 are the prongs that contact the electrical circuit wire terminals I3, 6 is a screw bolt extending inwardly to enter the part 8 by means of the thread end I5 to provide means for the adjusting of 8 to maintain a positive contact between I3 and I2, which are the inner ends of the

prongs

4 and 5, It refers to an aperture in the curved portion, 9 and I0 are receptacles for the fuse II which is held in position within the opposing receptacle parts 9 and III by means of the spiral spring I4.

As shown and described, the invention comprises a body of two parts, the top and lower,

the upper side edges of the lower part 2 are formed so as to receive the lower edge of the top part which is formed to engage and fit into the edge of 2 by a snapping action. The body being preferably made of plastic, such edges are sufficiently flexible to permit of the snapping action which securely holds the two parts together, the circuit wires enter the body of the plug throughthe aperture I6, their inner ends passing through the part 8 and forming the terminals I3 which are bent in the form shown-the part 8 being slightly movable lengthwise within the base portion of the device-the

prongs

4 and 5 terminate in a hook-like form and are adapted to contact with the wire terminals I3 as shown. Between the two separated sections of prong 4 are provided two opposed receptacles, in which an ordinary cartridge fuse II is disposed and retained securely therein by means of the spring I4, the fuse II being of a lower amperage than that of the electrical circuit which supplies the plug, or the house wiring, will blow out first in case there is a short in the conductor or appliance and is replaceable, thus providing a safety means. The threaded screw bolt 6 provides a means for adjusting the part 8 so as to move the terminals I3 in close contact with the prong terminals I2, as shown in Fig. 2.

The device is adapted for use on any electrical appliance which requires the use of a, cord and operated by means of the ordinary house wire circuit. The body is preferably made of plastic, or other suitable and similar materials, with the usual metal parts inclosed.

The invention is shown and described in a desired and useful form and structure, however adaptations in use may require or necessitate modifications and changes in form, or structure, or both without departing from the basic features of the invention or the spirit of the invention.

Having described my invention and its purposes and uses, I now claim:

An electrical plug, comprising a, body consisting of two separable parts, one of said parts forming a cover and adapted to be retained by the other in assembled position by means of resilient tongues extending lengthwise and on the inner side of said cover part, said tongues engaging in grooves extending lengthwise and on the inner side of the component separable part, said component part being the major part of the body, said major part embodying equi-spaced and parallel channels containing prongs to complete the circuit, a movable block disposed within the major part of the body through which are inserted the terminals of the electric circuit wires, said terminals contacting the inner ends of the prong members, said inner prong ends formed so as to accommodate and facilitate contacting said circuit wire terminals, a screw bolt disposed between the prong members and equi-distant between said parallel channels with the threaded inner end engaging a threaded aperture in said movable block part disposed within the major part of the body to facilitate and provide for adjustment of said block in the body to maintain close electrical contact between said wire terminal ends and formed prong ends,

one of said prongs being formed in two sections, a safety means disposed between the two see tions of said prong, consisting of a receptacle" affixed on the inner end of each of the two sections, a removable and replaceable cartridge fuse disposed and retained between such receptacles, such fuse being of a lesser current carrying capacity than the safe amperage rating provided in the electricity supplying circuit wires.

RAYMOND PHILIPS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,481,278 Wood Jan. 22, 1924 2,030,016 McIntosh Feb. 4, 1936 2,110,508 Klopfer Mar. 8, 1938 2,249,827 1 Herman July 22, 1941