Patent GB-644383-A (GB)
Abstract: 644,383. Calculating -apparatus; transfer mechanism. REMINGTON RAND, Inc. May 30, 1947, No. 14423. Convention date, May 25, 1939. [Class 106 (i)] In an adding and subtracting machine, items set by keys 30, Fig. 1, are entered into an accumulator, and manually operable means 201 cause the complement of a negative item to be entered, the items are indicated on dials 163 having different sets of figures for positive and negative items, and a shutter 213, normally concealing the negative set, is operable with the means 201 to display figures of this set, the shutter and means 201 being controlled by latching means releasable by the main drive of the machine. As shown, a machine of the singlebank type in which items are set on a transverselytravelling pin carriage 26, Fig. 2, is operated by a handle 38, Fig. 1, to transmit the items to pinions 60, 160 of the accumulator and items indicators respectively. The total can be read on the items indicator upon depression of the key 115. General operation; itemsetting. The keys 30 depress pins 28, Fig. 2, which engage stops 31 on actuating racks 32 to limit their rearward movement, which is normally prevented by a restraining plate 55 pivoted on and moving with the carriage 26. Each rack 32 is connected by pins-and-slots and a spring 36 to a slide 35, and the rack and slide, urged rearward by a spring 37, are released and returned by a bail 53 on rocking of the handle 38. The bail is connected by links 52 to arms 51 fixed on a shaft 50 which also carries an arm 48, Fig. 3, with a roller 47 engaging a cam slot 46 in a plate 45 fixed to the main shaft 44. This shaft may be power-actuated but, as shown, is connected by a sector 43, link 42 and arm 41 to the shaft 40 of the handle 38, and is spring-urged clockwise. The carriage 26 is returned near the end of the return stroke of the handle 38 by an arm 87 connected to the plate 45 and having a notch 90 which engages a roller 91 on an arm 92 fixed to a shaft 93 which is connected by a bevel-gear sector 94 to a gear 95 on shaft 96 connected to the carriage by linkwork 97, 98. A lug 92a on the arm 92 disengages the notch 90 from the rollei 91 at the end of the carriage return. Totalizer - engaging . aligning. The totalizer or accumulator pinions 60, Fig. 2, are mountec on a shaft carried by arms 62 fixed to a shaft 63 which is rocked to bring the pinions into and out of engagement with teeth on the racks 32. An arm 65 on the shaft 44, Figs. 1, 4, carries a pivoted wipe pawl 66 urged anticlockwise, Fig. 4, by a spring 67. The pawl alternately engages pins 72, 73 on a pivoted plate 74, during the initial and return movements of the shaft 44 respectively, to rock a pin 76 engaging a notch in a link 81 connected to an arm 82 on the shaft 63. The shaft 63 is thus rocked to raise the pinions 60 out of engagement with the racks during their rearward movement and to effect engagement during the return movement. The arm 82 has a wedge-shaped end which engages one of two notches in a pivoted locking arm 85 connected by a spring to arm 82. The pinions 60 engage aligning prongs 112, Fig. 2, when out of mesh with the racks. Transfer mechanism. A lug 100, Fig. 2, on each accumulator pinion 60, depresses an arm 102 pivoted on a shaft 49, at transfer, so that a lug 39 on the rack 32 of next higher denomination is permitted to enter a notch in the arm thus allowing an additional movement of the rack teeth engaging the next higher pinion. A pivoted latch 105, connected to the arm 102 by a spring, has notches which are engaged by a lug on the arm. The arms are restored at the beginning of the next adding operation by a latch-engaging bail 110 carried on the arms 62. Subtraction. The complement of the subtrahend is set by the keys 30 and a pivoted subtract lever 201, Fig. 4, is then depressed and is retained by a detent spring 229. The inner end of the lever raises the plate 55 so that the racks for which no amount has been set will move to the " 9 " position. The transfer arm 102 associated with the final accumulator pinion and an additional arm adjacent the rack of lowest denomination are fixed on the shaft 49 for transferring the fugitive one. The lever 201 is connected by a link 208 and slot to a pin 211 on a pivoted arm 212 depending from the shutter 213 which has slots 215, 216 for displaying the different sets of figures (in black and red respectively) on the indicator dials 163. The shutter is moved by the lever from the position shown into one in which the negative (red) figures are visible through the slot 216 at a window 166, whereupon the pin 211 is engaged by a pivoted latch 220 carrying a pivoted spring- urged pawl 223. Rotation of the main shaft 44 by the forward movement of the handle 38 causes a roller on an arm 227 to engage the pawl 223 to rock the latch and a lug 231 on link 208 to restore the lever 201. At the beginning of the next adding operation the latch 220 is again raised to release the pin 211 which can now move to allow the shutter to be returned to the " add " position by a spring 217. Total-taking. The total key 115 can only be operated after a blank stroke is made to restore the transfer arms 102 to normal. The key is normally engaged by a locking hook arm 133, Fig. 2, on a shaft 131 which is connected by an arm 130, Fig. 3, to a rearwardly-extending link 126 guided by a fixed stud 127. The link is pushed forward, near the end of the forward stroke of the handle 38, by a roller 125 on the link 42 acting against a spring-urged latch 134 pivoted to the link. During a blank stroke, a toe 137 on the latch 134 engages a lug 138 on the carriage 26 to retain the link 126, and thus the arm 133, in the key-releasing position. The key 115 is connected to the arm 118, Fig. 4, of a bell-crank lever the other arm of which is connected by a link 122 to the link 81, so that key depression moves the link 81 to release the pin 76 from its notch and causes another notch 80 to engage a pin 77. This causes the pinions 60 to engage the racks 32 during their rearward (and not their return) movement, thus transmitting the total from the accumulator to the indicator dials 163, the rotation of the pinions 60 being stopped by the lugs 100 engaging parts of the arms 102. The link 122 has a lug 123 which engages the plate 55 to release the racks. An arm 141, Fig. 1, integral with arm 118, is connected to a link 142 carrying a lug 144 which coacts with a flange on a plate 146 fixed on the shaft 44 to prevent depression of the key 115 during an ordinary machine operation. Also, whenever the subtract lever 201 is operated, an arm 214, Fig. 3, depending from the shutter 213, rotates a shaft 236 through linkwork 232, 233, thus causing an arm 234 to raise the latch 134 thus lifting the toe 137 above the lug 138 to prevent release of the key 115. Items and totals indicator. The pinions 160 are in permanent mesh with gear sectors 155, Fig. 2, mounted on a rod 34. Each rack 32 has an arm 150 which engages a roller on a depending arm 154 of the corresponding sector which is connected by a spring 157 to the slide 35. The sectors are locked during the return movement of the handle 38 by a bail 186 carried by a pivoted arm 183, Fig. 4, connected by a link 181 to a plate 178 similar to the plate 74 and operated in like manner by a wipe pawl 171 on an arm 170 integral with the arm 65. See also under " Subtraction." U.S.A. Specifications 1,835,170 and 1,899,444 are referred to.