Tabulation operation sensing unit for automatic typewriter

Details Tabulation operation sensing unit for automatic typewriter Tabulation operation sensing unit for automatic typewriter

1975-06-04

1976-09-07

Burr, Edgar S.

Textiles: fiber preparation

403356, B41J 2100

Patent

active

039789667

ABSTRACT:
A unit for sensing a tabulation operation in an automatic typewriter. An interconnecting member is disposed between a typewriter mainspring and a fluid clutch. This member has a disk portion nested in a hole formed in a mainspring housing. An eccentric pin portion extends axially from the disk portion and engages the mainspring while a counter-extending shaft portion engages a drive shaft from the fluid clutch. When the mainspring unwinds during a tabulation operation, it rotates the interconnecting member and drive shaft to displace an outer housing arm on the fluid clutch and close a switch thereby to indicate the occurrence of the tabulation operation.

REFERENCES:
patent: 349365 (1886-09-01), Roots
patent: 1446652 (1923-02-01), Morris
patent: 3006198 (1961-10-01), Cohen et al.
patent: 3097006 (1963-07-01), Logue

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