GB764048A - Paper feed drive mechanisms for recording instruments - Google Patents

Abstract

764,048. Recording-apparatus. LANDIS & GYR AKT.-GES. Jan. 21, 1955 [Jan. 23, 1954], No. 1901/55. Class 106 (4). [Also in Group XXIV] Paper feed mechanism for a recording-instru. ment comprises a feed cylinder 22 and means for transmitting a drive thereto provided with an intermediate driving clutch 39 comprising an axially slidable toothed wheel 37 which is spring-urged into driving engagement, the engagement being unaffected by the torque transmitted in a forward or a reverse direction. Supply and take-up rolls are mounted on stud axles fixed to side-plate 12 and screwed by knurled heads 25, 26 into side-plate 11 and paper is drawn from the supply roll by the cylinder 22 driven from the shaft 24 by chain- and-sprocket means and thence over a platen by the take-up roll which is driven from the shaft 24 through a friction clutch 34 by chain-andsprocket means. The shaft 24 is driven by a synchronous motor 35 through the intermediate driving clutch whose hollow knurled head 39 houses a spring 44 which bears against the head of a screw 43 and urges the toothed wheel 37 against a split disc 41 located in a circumferential groove in the motor shaft 40 keeping the wheel 37 in mesh with a toothed wheel 38 on the shaft 24. The shaft 40 drives the wheel 37 through a pin 42 in an axial groove. The paper may be adjusted to a desired time mark by turning the knurled knob 31 on the cylinder 22 while disengaging the wheels 37, 38 by pulling out the knob 39.