Plug for audio device

• US 4,647,135 A
• Filed: 07/10/1985
• Issued: 03/03/1987
• Est. Priority Date: 07/10/1985
• Status: Expired due to Term

• Current Assignee: Whirlwind Music Dist Incorporated
• Original Assignee: Whirlwind Music Dist Incorporated
• Inventors: Reinhardt, Chrys J.
• Primary Examiner(s): Weidenfeld, Gil
• Assistant Examiner(s): Paumen, Gary F.
• Application Number:
  US06/753,723
• Time in Patent Office: 601 Days
• Field of Search: 339/103 B, 339/103 C, 339/183, 339/103 R
• US Class Current: 439/460
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/58 Contacts spaced along longitudinal axis of engagement

Abstract

A generally tubular plastic collet, which is mounted coaxially in the bore of a rigid, tubular housing, has on one end thereof a plurality of radially flexible jaws that surround one end of an electrical cord that extends into the housing bore at one end thereof. A metal tip has an externally threaded shank that is adjustably threaded into the opposite end of the housing bore, and an elongate stem portion which projects to the exterior of the housing. The tip comprises a pair of coaxially disposed conductors insulated from each other in a conventional manner, and connected in the housing to a pair of wire conductors that project from the cord. The threaded end of the tip engages and urges the collet axially toward the inlet end of the housing, thereby flexing the collet jaws radially inwardly into gripping engagement with the cord.

Claims

1. An improved electrical plug, comprising a rigid housing having therethrough an axial bore having a reduced-diameter inlet opening at one end thereof for slidably receiving one end of an insulated electrical cord containing two wire conductors,

a metal tip removably mounted at one end into and closing the opposite end of said housing,

said tip comprising a pair of coaxial conductors secured one to the other and extending into said housing for connection to said two air conductors, and projecting coaxially beyond and out of said opposite end of said housing, and

a generally tubular-shaped one-piece collet mounted in the bore of said housing to extend between said inlet opening and said one end of said tip,

said collet having formed on one end thereof a plurality of radially flexible jaws confronting on said inlet opening and disposed to surround said one of said cord when the latter is inserted into said inlet opening, and

said one end of said tip comprising an externally threaded portion of one of said coaxial conductors threaded in said opposite end of said housing for limited axial adjustment into an operative position in which said one end of said tip engages and causes said collet to be urged axially against said inlet opening, thereby to cause said jaws to be flexed radially inwardly by the marginal edge of said inlet opening, and into gripping engagement with said one end of said cord.

2. An improved electrical plug as defined in claim 1, wherein said housing has in its outer peripheral surface a plurality of axially spaced, circumferential recesses.

3. An improved electrical plug as defined in claim 1, wherein said collet is made from a flexible, plastic material.

4. An improved electrical plug as defined in claim 1, wherein said one coaxial conductor has intermediate its ends an external circumferential shoulder engagable with said opposite end of said housing to limit the extent to which said one end of the tip can be threaded into said housing.