Electrical terminal to be crimped to a coaxial cable conductor, and crimped coaxial connection thereof

• US 5,490,801 A
• Filed: 11/09/1993
• Issued: 02/13/1996
• Est. Priority Date: 12/04/1992
• Status: Expired due to Fees

• Current Assignee: The Whitaker Corporation (Meggitt PLC)
• Original Assignee: The Whitaker Corporation (Meggitt PLC)
• Inventors: Fisher, Robert L. Jr., Hosler, Robert C. Sr.
• Primary Examiner(s): PIRLOT, DAVID
• Application Number:
  US08/151,458
• Time in Patent Office: 826 Days
• Field of Search: 439/578-585, 439/675, 439/322, 439/344, 439/607, 439/877, 439/879, 439/882
• US Class Current: 439/585
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/44 comprising impedance matching means
• CPC Class Codes: H01R 9/0518 Connection to outer conductor by crimping or by crimping ferrule

Abstract

A method for crimping a terminal (30) to an end of an inner conductor (20) of a coaxial cable (10) so that the resulting crimp joint (22) is precisely located a selected distance rearwardly from a mating point of the contact section (32) with a complementary contact section of a mating terminal affixed to an other coaxial cable. The terminal includes an intermediate section (42) of selected length, reduced diameter and location between the body section (34) and the crimp joint (24), such that, in cooperation with a smaller diameter forward portion (218) of the bore of the connector outer shell (210) coextending therealong, a region of deliberate impedance mismatch results compensating for other mismatches of the coaxial connection for minimized overall mismatch. A locating fixture (100) affixed to crimping tool (50) has an aperture (102) includes a stop surface (130) which stops the terminal during insertion through the crimping port (56) of the crimping tool and into the aperture by abutting with a ledge (38) of terminal (30), resulting in a target portion (46) of the crimping barrel (40) being precisely opposed from the tool'"'"'s reciprocating crimping dies (80,82) to be crimped. Mating connectors (202,302) are affixed to cables (200,300) containing the improved crimped terminals.

Claims

1. An electrical terminal for use in crimp termination to an inner conductor of a coaxial cable and having a conductor-receiving barrel at a rearward end, a contact section at a forward end for mating with a complementary contact section of a complementary terminal at a known axial location along said contact section, and further having a body section between the contact section and the conductor-receiving barrel;

and

said terminal including on a forward end of said conductor-receiving barrel of said terminal forwardly of a crimping region thereof, an intermediate section of selected outer diameter different from the diameter of said conductor-receiving barrel and greater than that of said body section of said terminal, and having a selected axial length and selected position adjacent said body section; and

said terminal being free of projections and other sections of varying diameter, for generating a deliberate impedance mismatch thereat during in-service use after being crimped to an end of an inner conductor of a coaxial cable and disposed within a coaxial connector.

2. A crimped connection of a terminal to an end of an inner conductor of a coaxial cable, the terminal having a conductor-receiving barrel at a rearward end within which said inner conductor end has been crimped at a crimping region thereof, a contact section at a forward end for mating with a complementary contact section of a complementary terminal at a known axial location along said contact section, and further having a body section between the contact section and the conductor-receiving barrel;

said terminal including on a forward end of said conductor-receiving barrel of said terminal forwardly of said crimping region thereof, an intermediate section of selected outer diameter different from the diameter of said conductor-receiving barrel and greater than that of said body section of said terminal and having a selected axial length and selected position adjacent said body section; and

said terminal being free of other projections and sections of different diameters, for generating a deliberate impedance mismatch thereat during in-service use after being crimped to an end of an inner conductor of a coaxial cable and disposed within a coaxial connector.