Improvements in or relating to stationery feed control mechanism for imprinting machines

摘要

803,889. Typewriters &c. SMITH & SON (ALACRA), Ltd., W. H. June 5, 1957 [June 5, 1956], No. 17313/56. Class 100(4) Stationery feed mechanism of the type having an electric switch which stops operation of the feed means, at least one rotatable abutment which operates the switch and is synchronously driven with the machine has a gear train including an intermediate gear which is spring-urged into engagement with one of its mating gears and can be manually withdrawn from such engagement in order to facilitate relative angular adjustment of the driving and driven gears and hence of the abutment and driving mechanism of the machine. Gear 12, Fig. 1, is driven by the platen through shaft 5, gear 9, and intermediate gear 10. Gear 12 carries abutments 17 on quadrant 14, angularly adjustable relative to gear 12, which operate switch 56 twice per revolution of gear 12. Disc 68 also rotates with gear 12 and has an annular row of holes 69 into which abutment pins 70, Fig. 3, may be inserted for engagement with roller 71 of switch 57 for stopping the feed at intermediate positions. Depressing key 52, Fig. 1, on arm 51 rotates quadrant 11 about the axis of shaft 9 to disengage gear 10 from gear 12. Further depression causes quadrant 11 to abut pin 60 on bracket 55 carrying switches 56, 57 to rock the bracket anticlockwise about shaft 59. Detent 54 holds arm 51 depressed. Adjustable stop 62 cooperating with pin 63 on bracket 55 limits movement of the switches towards shaft 13. Specification 610,555 is referred to.