Patent GB-555679-A (GB)
Title: Improvements in or relating to paper feed mechanism for statistical and like machines
Filed: 1942-04-07
Abstract: 555,679. Typewriters &c. FARRER, J. O. (Remington Rand, Inc.). April 7, 1942, No. 4567. [Class 100 (iv)] Platen-rotation for blanking.-A planet-pinion, engaging a pinior which engages a small pinion on the platen, is carried by an oscillating yoke and is automatically locked and released during the forward and return strokes of the yoke. The yoke may be operated by a handlever or automatically, and in the latter case record-card controlled means may cause the platen tc receive alternate short and long feeds. In the mechanism shown in Fig. 6, a large pinion 32 mounted on a stud 34 on the platen-carriage of a tabulating-machine, engages a small pinion 31 on the platen-shaft 23, and a planet-pinion 38 mounted on a pin 37 in a yoke 35 which can rock on the stud 34. A toothed wheel 40, secured to the pinion 38, co-operates with a positive lock consisting of a square stud 41 on a bell-crank 42 pivoted on the yoke and adapted to engage a pawl 45 pivoted on the yoke. A hand-lever 46 is pivoted on the pin 37 and has lost-motion engagement with the yoke. A spring normally holds the yoke in contact with an adjustable back-stop 57. When the hand-lever is drawn forwards, lost-motion is taken up, a pin 51 on the hand-lever depresses the bell crank 42, the stud 41 locks the wheel 40, and the pawl 45 engages the bell-crank. On further movement of the hand-lever, the pinions 38, 32 move as a unit and the platen is rotated to blank-feed the web. At the end of the feed, a fixed stop 53 knocks off the pawl 45 and arrests the yoke 35. On release, the hand-lever is rocked by a spring, the bell-crank 42 is raised by a spring 44, and the yoke is spring-returned into contact with the backstop 57, the pinion 38 rolling freely on the pinion 32. To provide for compensating blank-feed, an arm 70 is set to engage a pin 68 on the bell-crank at the end of the back-stroke, the bell-crank being thereby depressed and latched, and the pinion 38 being locked. During successive line-spacing movements, the yoke 35 and the members carried thereby are advanced, and when the hand-lever is pulled forwards, compensating blank-feed is effected. The stop 57 is carried by a plate 58, Fig. 3, which is mounted on the stud 34 and is provided with a toothed lug 67 adapted to engage a stationary, toothed sector 60, engagement being maintained by a spring 63. To adjust the stop, the plate is pulled away from the sector, swung into the new position, and then allowed to 're-engage the sector. The stop 57 carries the stop 70 and is turned to set the stop 70 in active or inactive position. A spring pin 73 engages holes in the plate 58 to determine the positions. The pinions 31, 38 have half as many teeth as the line-spacing wheel 27 and the wheel 40 respectively, the gearing thus being coarse enough to stand the strain, whilst enabling feed-movements of an odd number of line-spaces to be performed. The teeth of the sector 60 are half the pitch of those of the pinion 32. The modified mechanism shown in Figs. 9 and 10 is operated automatically by means of a crank 91 which is connected by links 90, 87 and a bell-crank 88 to a yoke 84 carrying the planet-pinion 38. Since the yoke has a harmonic motion, a pawl 96 and ratchet-wheel 95 are employed instead of the abovedescribed positive lock 40, 41. During each upstroke of the link 87, the pawl holds the ratchet-wheel, and a uniform feed-movement is transmitted by the pinions 32, 31 to the platen. To provide for typing on each form two lines read from two different record-cards, and then blank-feeding to bring the first line on the next form into position, the link 90 has lost-motion connection with the bell-crank 88, and the link 87 has a stop 104 for co-operation with a rocking stop 101 controlled through a cable 110 by a special hole in the second of each pair of recordcards. When the first line has been typed, the downstroke of the link 87 is limited by the stop 101, and during the next up-stroke, the platen receives a four line-spaces movement. After the second line is typed, the stop 101 is withdrawn, the link 87 makes a full down-stroke, and on the next up-stroke, the platen receives a seventeen line-spaces movement, to bring the first line on the next form into position. Specifications 555,698 and 555,823, [Group XIX] are referred to.