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Self Locking Strain Relief Device

IP.com Disclosure Number: IPCOM000091545D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Melnychenko, W: AUTHOR

Abstract

Self-locking strain relief device 12 prevents strain being applied to soldered terminals 14 between flat cable 16 and terminating board 18.

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Self Locking Strain Relief Device

Self-locking strain relief device 12 prevents strain being applied to soldered terminals 14 between flat cable 16 and terminating board 18.

Wires 20 carried in cable 16 are soldered to terminals 14 of board 18 from the inboard end rather than in the usual manner. This arrangement of connecting allows terminals 14 to be dipped into a solder bath for automatic soldering of wires 20 to terminals 14 simultaneously. Cable 16 is then folded back on itself so that it extends away from board 18. Strain relief device 12 is then snapped into place over folded cable 16 and into locating notch 22 located on each side of board 18 adjacent the line of terminals 14. Thus, device 12 extends across the board 18 over the folded flat cable 16.

As a force is applied to cable 16 in the direction of the arrow, cable 16 slides until loop 24 of the fold hits point 26 of device 12 lifting it upward. Device 12 tends to pivot so that an opposite edge 28 presses cable 16 downward against the board 18 surface and establishes an equilibrium force. Thus, as the strain on cable 16 is increased in the direction of the arrow, the force on device 12, applied by cable 16 at point 26, increases thus increasing the force of the device 12 against cable 16 and board 18, tending to lock cable 16. This locking action of device 12 prevents any strain forces from being exerted on the solder joints between cable 16 and terminals 14.

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