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Card Punch Mechanism

IP.com Disclosure Number: IPCOM000095378D
Original Publication Date: 1965-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 85K

Publishing Venue

IBM

Related People

Forrester, JC: AUTHOR [+2]

Abstract

In this high-speed card punch mechanism, continuously rotating eccentric circular cam 10 vertically reciprocates scotch yoke 11. A series of punches 12 are mounted above yoke 11 in a line that extends across the path of travel of a card being punched. Punches 12 are selectively actuated by selectively operated interposers 13. Each interposer 13 is connected to a bell crank 14. This is normally held attracted to an electromagnet by holding coil 15 that extends around a series of interposer magnets. Each interposer 13, upon actuation of a release coil 16 that produces a field in opposition to that of the holding coil, is moved by spring 17 so as to place the interposer between punch 12 and yoke 11. Restore bar 18, carried by yoke 11, restores bell crank 14 to the electromagnet on the downstroke of yoke 11.

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Card Punch Mechanism

In this high-speed card punch mechanism, continuously rotating eccentric circular cam 10 vertically reciprocates scotch yoke 11. A series of punches 12 are mounted above yoke 11 in a line that extends across the path of travel of a card being punched. Punches 12 are selectively actuated by selectively operated interposers 13. Each interposer 13 is connected to a bell crank 14. This is normally held attracted to an electromagnet by holding coil 15 that extends around a series of interposer magnets. Each interposer 13, upon actuation of a release coil 16 that produces a field in opposition to that of the holding coil, is moved by spring 17 so as to place the interposer between punch 12 and yoke
11. Restore bar 18, carried by yoke 11, restores bell crank 14 to the electromagnet on the downstroke of yoke 11.

The card being punched is intermittently moved passed the punches by an escape mechanism. This is of the type in which the movement of the card is controlled by escape wheel 19 and pawl 20. The escape mechanism and wheel 19 are frictionally biased. Pawl 20, when engaged with the escape wheel, prevents rotation of wheel 19 and the escapement. Pawl 20 is actuated by escape interposer 21 that is connected to bell crank 22. Holding coil 23 energizes an electromagnet to attract bell crank 22 and hold interposer 21 out of the path of engagement with pawl 20. Upon energizing release coil 24, spring 25 pivots bell crank 22 causing interposer 21 to move to its operative position f...