Patent GB-660015-A (GB)
Title: Improvements in or relating to paper feed mechanisms for statistical machines
Filed: 1948-09-30
Abstract: 660,015. Typewriters &c. REMINGTON RAND, Inc. Sept. 30, 1948 [Jan. 23, 1948], No. 25525/48. Class 100 (iv). [Also in Group XIX] In a statistical machine having a paper web feeding mechanism and a pre-punched tape fed in synchronism with the web and which is sensed to control the feeding of the web, the web is advanced (a) line-by-line under control of the statistical machine by a cam-actuated linkwork and (b) by a continuously running motor arranged to effect a long feed operation under control of the perforated tape by effecting engagement and disengagement of the motor from web-advancing gears. The machine, as described in Specification 555,823, [Group XIX], comprises a card magazine 120, Fig. 1, from which cards are fed by a picker knife 118 and feed rolls 108 to a sensing chamber 122 where the card perforations are sensed by pins 138, raising lock pins 146. Located between upper side frames 101 is a translator 238 carrying wires 240 which transmits the motion of pins 146 to the permutation slides 235 of a decoding unit. The slides are positioned in accordance with the decoded data and set stops 225 which, in turn, co-operate with stepped heels 205 on type racks 195. The type racks are cyclically released and rise under spring tension to position accumulators 20 and type 197. Paper feed arrangements.-The paper web is fed from a zig-zag pile over a toothed feed roller 33, Figs. 1, 2, round guide rollers 37, 35 and past the intermediately spaced platen 36 and over a second feed roller 32. The rollers are mounted between two side frames 10 secured together to form a carriage pivotally mounted on a U-bracket 14 slidably mounted on the frame 101. The pivot is formed by a shaft 17 of the feed roller 33 allowing the carriage to be rocked against spring action from the raised position in Fig. 1 to that in Fig. 2, where it is held by a catch 23-25, releasable by a hand lever 26. A screw 22 provides adjustment of the clearance between the paper carriage and the machine frame, and a latch 27 holds the carriage in the raised position for threading a new paper web or ink ribbon. The feed rollers are axially adjustable to accommodate different width papers and are driven from two sources, one the line spacing mechanism and the other an independent motor 125, Fig. 3, effecting the long feeding of the web, pivotally mounted in the carriage so that its driving worm 127 can be moved into or out of engagement with a worm wheel 128 secured on a shaft 42 carrying the feed rollers 32. Bevel gearing 54-51, Fig. 2, couples the feed rollers 33 to rotate at the same speed. The shaft 42 also carries a toothed wheel 130 with which co-operates a braking arm 131 resiliently carried on a bracket 132 secured to the motor 125. The disengagement of the motor from the worm wheel 128 is effected by the operation of a "Stop" solenoid 136, Fig. 3, which draws down a plunger 138 and arm 135 attached to the motor and simultaneously engages the braking arm with the wheel 130. The movement of arm 135 breaks a pair of electrical contacts 150 and solenoid 136 releases plunger 138 allowing the arm 136 to return a sufficient amount to release the braking arm from contact with wheel 130 and be held below a latch 140 associated with a " Go " solenoid 137. The other source of drive to the feed rollers, the machine mechanism effecting line space feeding, is operated by a cam 732, Fig. 6, through a follower 731, crank 730, link 728, arm 726, bail 63, arm 64, linkage 66-69 and ratchet mechanism 70-71 to rotate a shaft 60 from which bevel gearing 55, 56 and 54, Fig. 2, transmits the drive to the feed rollers 32, 33. The feeding of the paper by either of the two sources is controlled by an endless perforated tape 155, Figs. 3 and 11, driven by a wheel 157 in synchronism with the web and travelling round a wheel 165. Wheel 157 is insulated from the shaft 42 and forms part of a sensing device in which four bushes 173-170 mounted on a pivoted arm 167 close circuits through perforations in the tape to effect the various starting stopping and control arrangements of the web feed. The arm 167 is urged into contact with the drum by a' sprung arm engaging an end part 174 of the arm shaped so it may be hooked in a disengaged position. Platen impression arrangements.-A machine shaft 184, Fig. 6, carries a cam 708 engaging follower 707 which draws a link 709 downwardly and pivots a bail 703 having a roller 705 engaging a bail 73 fast on a shaft 65. The movement of shaft 65 pivots the arm 76 attached to platen supporting arms 75 which slides the platen 36 into printing position. Operation.-In operation, the feeding of the paper web is controlled by the tape 155 which has four rows of holes 160, 161, 162, 163, Figs. 11 and 12, the holes being arranged longitudinally in alignment with various positions on the particular form 156 in use. In the example shown hole 160 is sensed when the web reaches the last line of the items section of the form, hole 163 at the first line in the address space, and holes 161, 162 in first and second lines respectively of the items space. When a hole 163 is sensed a circuit is completed through a pair of normally closed contacts of a Relay A and operates the " Stop solenoid 136 thus disconnecting the motor 125 whereupon feeding is controlled by the machine line feeding mechanism, to print the three lines of the address. Hole 161 is next sensed which has no effect if a " total " had been taken during the previous items section on the form, and the machine continues to line space from the machine mechanism. Hole 162 is sensed at the second line and causes Relay A to operate, and to be held operated by normally closed contacts on Relays B and C, interconnected with a series of contacts 180-184 associated with operational functions of the machine and which are short circuited by switches SA-SE in accordance with the requirements of the form being fed. If a " total " is taken in the items section, contacts 181 are closed by the totalling mechanism and contacts 180 close in the printing operation so that in the example illustrated a circuit is formed which operates Relay B releasing Relay A. Operation of Relay B operates the " Go " solenoid 137 and the long feeding motor 125 drives the form until hole 163 is sensed operating " Stop solenoid 136. If a " total " has not been taken Relay B does not operate and Relay A remains operated when hole 163 is sensed, and, in consequence, long feeding continues until the hole 161 is sensed which then causes the " Stop " relay to operate through a circuit completed by contacts of the Relay A which has remained operated. In arranging the circuits to print only one line i.e. name and the amount on a cheque, all the contacts 180-184 are closed except print contact 180 so that after printing when the Relay B operates energising the " Go solenoid, the long feed continues until the hole 163, positioned opposite the printing line, closes the " Stop " solenoid. Specification 618,267 is referred to. Ink-ribbon mechanism.-The Specification as open to inspection under Sect. 91 comprises also an ink-ribbon mechanism wherein the movement of shaft 65 and arms 75, 76 operated in the platen impression arrangement cause the ribbon to be moved away from the type 197 during the setting of the type bars 195. An ink-ribbon automatic reversing feed comprises a link 85, Fig. 6 (Cancelled), reciprocated in the operation of the machine and which oscillates a lever 88 and a link 91 carrying a pin 92 which engages the furthermost notch in a sector 93 having an extending arm 94 which, in oscillating, steps. a ratchet drive 116-113 of left hand spool 83. When the spool is nearly full, a ribbon-engaging pin 98 draws a lever 97 downwardly until its hooked end engages a protrusion 96 on the arm 94 whereupon the next oscillation of the link 91 will not move the sector 93 and the pin 92 on the link 91 moves into the nearer notch in the sector. The ribbon drive is now transmitted through a shaft 90 and, by a linkage 107, 106, 104 and a second ratchet mechanism, the spool 84 is driven until the nose of a blocking arm 110 having a ribbon engaging pin 112 moves into the path of the arm 104 and link 91 on its next movement snaps into the furthermost notch again. This subject-matter does not appear in the Specification as accepted.