Electrical plug

• US 5,302,135 A
• Filed: 02/09/1993
• Issued: 04/12/1994
• Est. Priority Date: 02/09/1993
• Status: Expired due to Fees

• Current Assignee: Lee, Feng-Jui
• Original Assignee: Lee, Feng-Jui
• Inventors: Lee, Feng-Jui
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): NGUYEN, KHIEM M
• Application Number:
  US08/015,230
• Time in Patent Office: 427 Days
• Field of Search: 439/259, 439/263, 439/801, 439/806, 439/851
• US Class Current: 439/263
• CPC Class Codes: H01R 13/15 Pins, blades or sockets having separate spring member for producing or increasing contact pressure
• CPC Class Codes: H01R 13/193 Means for increasing contact pressure at the end of engagement of coupling part , e.g. zero insertion force or no friction
• CPC Class Codes: H01R 13/639 Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap

Abstract

Disclosed is an electrical plug having contact tubes retained between a top shell and a bottom shell by an adjusting binding screw and two washers, and a plate spring retained between the top shell and one washer, wherein turning the adjusting binding screw inwards causes the top and bottom shell to squeeze the split front end of each contact tube in reducing its diameter for positive contact.

Claims

1. An electrical plug comprising:

a top shell having two parallel grooves on a flat bottom wall thereof;

a bottom shell having two parallel grooves on a flat top wall thereof respectively connected to the parallel grooves on said top shell;

an adjusting binding screw inserted through center holes on said top and bottom shells to bind up said top and bottom shells together;

two contact tubes inserted in said parallel grooves and retained between said top and bottom shells, each contact tube having a rear end connected to an electric wire and a front end for receiving a respective contact pin of an electrical socket;

a first washer fastened to said top shell on the outside by said adjusting binding screw;

a plate spring retained between said top shell and said first washer;

a second washer fastened to said bottom shell on the outside by said adjusting binding screw; and

wherein each contact tube has a split front end, the diameter of the split front end being reduced by turning said adjusting binding screw inwards.