Patent GB-537735-A (GB)
Abstract: 537,735. Typewriters &c. BURROUGHS ADDING MACHINE CO. Oct. 2, 1939, No. 26983. Convention date, Oct. 4, 1938. [Class 100 (iv)] [Also in Group XIX] In a machine having a travelling record carriage and means for driving it through cycles of operation a control means is provided for the carriage moving means together with a settable means to vary the control means in predetermined column position and with means cooperating with the settable means during the carriage movement to cause the carriage to come to rest in accordance with the setting. By this means it is possible to skip different and variable column positions in the tabulating direction of movement and to arrest the carriage in different and variable positions in the return direction. The machine can be easily adapted, by the minimum change of parts, to operate for various programmes and for widely differing accounting forms or sheets. The invention is shown applied to a Burroughs machine of the high keyboard type with a motor clutch as described in U.S.A. Specification 1,580,534 and with an automatic repeat printing mechanism as described in U.S.A. Specification 2,087,542 and Specification 12083/07, [Class 100]. The movement of the carriage is controlled in the tabulating direction by adjustable stops 17, Figs. 1 and 14, on a rockable stop bar 18. The active stop 17 engages a fixed stop 19 and is freed therefrom near the end of the return stroke of the machine by means of a pawl 20 on a slide 21 operatively connected by a lever 22 to a cam 23. A skip tabulating bail 24 controlled by a stop 27 has an arm 25 which co-operates with an arm 26 on the stop bar 18 to hold the bar and stops 17 in inoperative position. The carriage tabulating 'mechanism is disabled by the usual normal key 28 which, on depression, lowers a slide 31 connected by an arm 32 to a lever 33 that operates a thrust bar 34 to rock the pawl 20 and prevent action on the stop pawls 17. An extension 35 on the normal tabulating key stem rocks a lever 37 and yoke 41. An arm 42 of the yoke carries a stud that co-operates with pawls 121 to disable the skip tabulating and carriage return mechanism. The carriage return mechanism comprises power means as described in Specifications 400,968 and 22194/14. [Class 100 (iv)]. and U.S.A. Specification 1,580,534. The clutch member 48, Fig. 2. is controlled by a stud 49 on a lever 50 which is itself controlled by a pin 51 and lever 52. Skip tabulating control. In accordance with the present invention the tabulating and skip mechanism is controlled in a selective manner automatically by the carriage or manually. For this purpose the stop 27 is mounted on a vertical slide 54, Fig. 2, which supports six control slides 58 terminating in lateral lugs 62 any one of which can be engaged by the inturned lug 63 of a pivoted selector 64 that is mounted on a sliding plate 66. All these members are spring controlled and the lowering of any one control slide 58 by the selector 64 is controlled by different sized rollers 70, Fig. 6, on the carriage. The effective roller co-operates with one arm 71, Fig. 3, of a yoke 72 the other arm of which displaces a link 75 and bell crank 76 to lower a slide 78, Fig. 2. The slide 78 has a pin engaging a rocker 80 pivoted on a slide 82 which is thereby lowered and through a rack 86 rocks a stepped plate 88. The stepped edge of this plate determines the extent of movement of a bell crank 96 and positions a slide 99 to limit the angular setting of the selector 64 by a pin 100 engaging the slide 99. The bell crank 96 is controlled by the cam surface 106 of a bell crank 105 operatively connected to a cam on the main clutch shaft. The operation of the sliding plate 66 to lower the selected control slide 58 is effected by the pawl 121, Fig. 1, which is pivoted on an extension of the plate and engages a square stud 122 on an operating lever 123 rocked by an arm 126 on the shaft 15. The pawl 121 is provided with an extension 127, Fig. 3, which engages an arm of a lever 128 to hold the pawl in inoperative position so long as the stepped plate is in normal position. Each control slide 58 has a notch that co-operates with a corresponding latch 136 to hold it in its lowered position. Release of the latch to stop the carriage after its skip movement is effected ;by appropriately notched discs 140, Figs. 3 and 6, on a shaft 141 on the carriage. This mechanism can also be utilized to control the regular tabulating movements from column to column Varying control for different lines. To vary the carriage tabulation on different lines on the same accounting form use is made of multiplearm members 150, Fig. 6, instead of rollers 70. The members as shown have three arms of different length and are rotatable on studs 153 being adjusted by rack and pinion mechanism by manipulation of a handle 159. A tabulating stop 17 is placed at every position in which the carriage is to be stopped. The effects of the release discs 140 may also be varied independently of or together with the members 150. As shown the shaft 141 carrying the discs is differentially rotatable by means or a helical cam 167 and an arm 165 operatively connected to the rack mechanism. Variation in tabulation may also be effected by changing the stepped plate 88. Manual control of tabulation; motor bar, total and sub-total key control. The machine shown has the usual motor starting bar 170 and upper and lower bars 215, 171. The lower bar on depression acts on a bell crank 173, Fig. 1, connected to a link 177 which on its forward movement rocks a notched plate 184 pivoted on a lever 181. During operation a stud 197 on the usual full-stroke segment rocks the lever 181 and lowers the plate 184 which, by engagement with a stud 200, rocks a bell crank 201 and through a linkage 205, 208 and 209 depresses a slide 84, Fig. 2, to operate the rocker 80 and lower the slide 82 so as to vary the carriage movement. The plate 184 is held in adjusted position by. a detent roller 191 on a bell crank 192 operated to free the detent by means of a pawl 193 carried by the lever 181 coacting with the stud 197. The upper motor bar 215 carries a stud 216 which on depression engages a projection 217 on the plate 184 to adjust it to a different degree from that effected by the lower bar 171. The total key T on depression rocks a shaft 223, Fig. 7, and an arm 224 thereon rocks the bell crank 173 to displace the link 177 and set the control plate 184. The subtotal key ST acts through the total key lever in a like manner. Carriage return selective control. The carriage is returned by power means as described in U.S.A. Specification 1,580,534. It can be returned to any one of a number of positions by associating the clutch lever 52 with a number of control slides 242, Figs. 2 and 3, provided with projecting lugs 246 adapted to be selectively engaged by a selector 248 pivoted on the sliding plate 66 and differentially settable, in a manner similar to the selector 64, by carriage rollers 250 or three armed members 251 and by mechanism associated with a stepped plate 270. The selected control slide 242 is lowered to couple the clutch, when the plate 66 is operated, and is held by a corresponding latch 295. Each latch is notched to receive an arm of a bail 299 the other arm 301 of which is in position to be engaged by release rollers 302 on the carriage to stop the movement. Variation in the release can be effected by replacing the rollers 302 by threearmed members 303. The manipulative lever 159 or a separate handle may be used to vary the effect. The effect of the setting may be varied by manual means, such as the auxiliary motor bars, total and sub-total keys, by the action of a rocker similar to the rocker 80. Control means to move the carriage selectively in either direction. By the means above described difficulty arises if certain of the control slides 58 or 242 are operated simultaneously. This difficulty can be avoided by omitting the slides in various positions. To increase the capacity of the machine a modified arrangement illustrated in Fig. 11, is employed whereby the selection of the tabulating and return mechanism is mutually exclusive. The stepped plates 88a, 270a, are modified and are associated with interconnected auxiliary notched plates 400, 401 which in their normal position prevent studs on the bell cranks 96a, 276a from entering the notches. Different sized rollers on the carriage set the auxiliary plates differentially to control the movement of one or other of the bell cranks when the sliding plate 66 is lowered with the pawl in engagement with the operating lever 123. Specification 193,455, [Class 100 (iv)], also is referred to.