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Electrical Contact

IP.com Disclosure Number: IPCOM000089867D
Original Publication Date: 1968-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Goth, RM: AUTHOR [+3]

Abstract

Electrical contact wire assembly 10 is provided for use with a starwheel lever arm 12 of the type used to sense holes in a program card or the like. Arm 12 is pivoted about shaft 14 and carries starwheel 16 that is normally free to ride over a program card. Assembly 10 is initially loaded by forces indicated at R1, R2, F1, and F2. When starwheel 16 rises into a hole in the program card, arm 12 rotates counterclockwise. Forces F1 and F2 carry the forward U-shaped end 18 of wire assembly 10 downwardly. When movable contact pad 20 engages fixed contact pad 24, forces R3 and F2 cause pad 20 to rotate in the direction indicated by arrow 22. At this time, forces R3 and F2 comprise a force couple that tends to twist assembly 10.

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Electrical Contact

Electrical contact wire assembly 10 is provided for use with a starwheel lever arm 12 of the type used to sense holes in a program card or the like. Arm 12 is pivoted about shaft 14 and carries starwheel 16 that is normally free to ride over a program card. Assembly 10 is initially loaded by forces indicated at R1, R2, F1, and F2. When starwheel 16 rises into a hole in the program card, arm 12 rotates counterclockwise. Forces F1 and F2 carry the forward U-shaped end 18 of wire assembly 10 downwardly. When movable contact pad 20 engages fixed contact pad 24, forces R3 and F2 cause pad 20 to rotate in the direction indicated by arrow 22. At this time, forces R3 and F2 comprise a force couple that tends to twist assembly 10.

Upon clockwise movement of arm 10, i.e., when starwheel 16 is cammed down out of the hole in the program card, wire assembly section 18 is carried upwardly. Since leg 26 of assembly section 18 is contacted first by arm 12, and leg 30 is initially free, the section 18 and hence pad 20 again rotate, this time in direction 28, while disengaging from pad 24.

In the above manner, contact wire assembly 10 provides a torsional movement, resulting in improved wiping or sliding engagement between contact pads 20 and 24. In addition, the loading of assembly 10 provides a constant pressure on arm 12, which substantially overcomes any tendency for arm 12 to bounce.

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