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Typewheel Printing Unit

IP.com Disclosure Number: IPCOM000097715D
Original Publication Date: 1961-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Hilpert, F: AUTHOR

Abstract

Each printing position has a typewheel 21 pivoted on lever 22. Type wheel 21 bears type faces 28 and stops 0...8. Typewheel 21 and lever 22 are arrested in predetermined positions at stops 0...8 and N, 9, 11 and 12 cooperating with the levers 23 and 24, respectively. By the force of gravity and by spring 25, 22 and 21 are constantly urged against the bail 26. The latter is moved by means of the cam 27 in synchronism with record cards being read.

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Typewheel Printing Unit

Each printing position has a typewheel 21 pivoted on lever 22. Type wheel 21 bears type faces 28 and stops 0...8. Typewheel 21 and lever 22 are arrested in predetermined positions at stops 0...8 and N, 9, 11 and 12 cooperating with the levers 23 and 24, respectively. By the force of gravity and by spring 25, 22 and 21 are constantly urged against the bail 26. The latter is moved by means of the cam 27 in synchronism with record cards being read.

When a digit 0...8 is sensed, lever 23 is released due to a read pulse applied to an electromagnet, not shown. This occurs at the same instant stop on 21 corresponding to the digit is in front of 23. The typewheel 21 is arrested in a position in which the type corresponding to the perforation is in front of the hammer 29 which produces an imprint upon actuation. Because of the manner in which the record cards are punched, the first digit pulse does not occur until after the stops 9, 11 or 12 of 22 pass 24 and 22 is stopped by its stop N abutting
24.

When an alphabetic character or digit 9 is sensed, lever 24 is released by the zone pulse and abuts the corresponding stop on 22 and the latter is arrested. The zone pulse has no effect on 23 as at this time the latter seats on slope 30 of
21. Upon the pulse produced by a numerical hole, typewheel 21 is arrested as described. When a digit 9 is sensed, wheel 21 rotates to the end. Due to the preceding arrest of 22, the pivot point of 21 has a different p...