Electrical connector housing and method for minimizing EMI emissions

• US 5,259,792 A
• Filed: 05/26/1992
• Issued: 11/09/1993
• Est. Priority Date: 05/26/1992
• Status: Expired due to Fees

• Current Assignee: Woven Electronics Corporation
• Original Assignee: Woven Electronics LLC (Rtx Corporation)
• Inventors: Shasteen, Sam S., Beck, Herbert C.
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): NGUYEN, KHIEM M
• Application Number:
  US07/887,890
• Time in Patent Office: 532 Days
• Field of Search: 439/607, 439/608, 439/610, 439/731, 439/906, 439/931, 174/117 F
• US Class Current: 439/607.49
• CPC Class Codes: H01R 12/00 Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures printed connections to, or between, printed circuits H05K1/11
• CPC Class Codes: H01R 12/775 Ground or shield arrangements
• CPC Class Codes: H01R 13/6599 Dielectric material made conductive, e.g. plastic material coated with metal
• CPC Class Codes: Y10S 439/906 Longitudinally divided

Abstract

A connector housing and method for minimizing EMI emissions from an electrical transmission cable is disclosed which includes providing a series of interrupt elements in each half of the connector housing which interlock together when the halves are clamped together about the electrical transmission cable. The interrupt elements provide discontinuity along the length of the interface joint which reduces the emission of interference signals from the housing. Preferably the housing connector and interference elements are molded from plastic material and plated with a metallic shield material.

Claims

1. A conductor housing for a multi-pin connector of a flat multi-conductor cable comprising;

a first housing half;

a second housing half mating with said first housing half which, when mated in a clamped position, forms a front opening;

said front opening being adapted to receive said multi-pin connector so that the front face of the multi-pin connector faces outward of the connector housing;

said first housing and said second housing half clamping together in a mated position to form a longitudinal interface joint along opposite sides of said mated connector housing generally transverse to said front opening; and

interrupt means formed along a length of said interface joints which defines a plurality of discrete joint segments for minimizing emissions of interference radiation from said connector housing when said first and second housing halves are clamped together.

9. The device of claim 1 including shielding strips carried by said first housing half and said second housing half and extending between said opposite sides at a rear opening of said conductor housing through which said cable extends.

2. The apparatus of 1 wherein said interrupt means comprises a series of interrupt elements extending longitudinally along said interface joint.

3. The device of claim 2 wherein said interrupt elements comprise a series of serrated teeth which interlock together along said opposite sides of said connector housing.

4. The device of claim 3 wherein said first and second housing halves each include a projecting series of serrated teeth carried along said interface joint on a first side of said housing half, and a recessed series of serrated teeth carried along an interface joint along a second side of said housing half.

5. The device of claim 4 including an outer wall formed on an outside of said serrated teeth when said projecting and recessed serrated teeth are interlocked together.

6. The device of claim 2 wherein said interrupt elements are molded in said first and second housing halves.

7. The device of claim 6 wherein said first and second housing halves are molded from a polymeric material.

8. The device of claim 7 wherein the molded first and second housing halves are plated with a metal plating for shielding.

10. A conductor housing for a multi-pin connector of a flat multi-conductor cable comprising;

a molded first housing half;

a molded second housing half mating with said first housing half which, when mated in a clamped position;

said first housing half and said second housing half clamping together in a mated position to form a longitudinal interface joint along respective first and second opposite sides of said mated connector housing;

interrupt elements extending along said interface joints of said first and second sides of said connector housing minimizing emissions of electromagnetic interference from said connector housing when said first and second housing halves are mated together; and

said interrupt elements interrupting said interface joints to define spaces along said interface joints which are less than a specified fraction of a wavelength of said emissions of electromagnetic interference to reduce said emissions.

11. The apparatus of claim 10 wherein said interrupt means comprises a series of said interrupt elements extending longitudinally along said interface joints.

12. The device of claim 10 wherein said interrupt elements comprise series of serrated teeth which interlock to define said prescribed spacing.

13. The device of claim 11 wherein said first and second housing halves each include a projecting series of serrated teeth carried along said interface joint on a first side of said housing half, and a recessed series of serrated teeth carried along an interface joint along a second side of said housing half.

14. The apparatus of claim 10 wherein said interrupt elements are molded in said first and second housing halves.

15. A method of minimizing electromagnetic interference emissions from a connector housing which terminates a flat electrical transmission cable, said connector housing being of the type having first and second interface joints defined along first and second sides of said connector housing, said method comprising:

making said first and second interface joints discontinuous by including interrupt elements along said first and second interface joints to define a plurality of discrete joint segments which minimize emissions of said electromagnetic interference through said interface joints of said housing.

16. The method in claim 15 including providing a series of interrupt elements spaced along the length of said interface joints.

17. The method of claim 16 wherein said interrupt elements are spaced less than 1/8 of the wavelength of said electromagnetic interference emissions.

18. The method of claim 15 wherein said interrupt elements are provided by a series of molded serrated teeth which interlock along said first and second interface joints.

19. The method of claim 15 wherein said connector housing includes a pair of housing halves fitted together, and said interrupt elements and said housing halves are molded and said interrupt elements interlock together when said housing halves are fitted together.