Patent GB-384759-A (GB)
Abstract: 384,759. Calculating-apparatus. FAIRWEATHER, W. C., 65, Chancery Lane, London.-(Elliott-Fisher Co. ; 342, Madison Avenue, New York, U.S.A.) Nov. 3, 1931, No. 30419. [Class 106 (i).] A typewriter computing machine employing a multiple-column work-sheet has a number of primary or column totalizers mounted on the movable carriage, a number of subsidiary totalizers for cross-totalling mounted on the stationary frame, and means whereby amounts entered in a selected primary totalizer may be registered in any one or more of the subsidiary totalizers. The primary totalizers are actuated digit by digit through a master wheel operated on the depression of a numeral type key. The depression of the keys at the same time set stops for controlling the differential actuating mechanism of the selected subsidiary totalizers which mechanism is subsequently operated through the agency of independent operating means. The invention is shown in Figs. 1. 2, and 3 as applied to the Underwood-Hanson type of machine. The primary totalizers 10 .. 23 are adjustable along a rack 40a on a bar 40 secured to a truck 41 which travels with the paper carriage 24. The denominational train of each totalizer at the computing zone meshes directlv with a master wheel 46 mounted on the stationary frame. A variable movement is imparted to the master wheel in accordance with the numeral type key 25 depressed. For this purpose the keys operate levers 27 to actuate type levers 29 and pull down dependent links 44. Each link is pivoted to a cam plate 45 with a cam slot 50 co-operating with a pin 51 on the corresponding arm 52 of a rock shaft 53 the movement of which is transmitted through an arm 54 and link 55 to a toothed sector 56 adapted to actuate the master wheel 46. 'The master wheel is normally inoperative but is clutched to its shaft on the depression of a key by a projecting finger 58 on the activated cam plate depressing a universal bar 59 to rock a shaft 60 and through a linkage 61 .. 66 to close the clutch 57. The direction of rotation of the master wheel for addition or subtraction is controlled bv a setting lever 97 which effects the engagement of one or other pinion 100, 101 of a reversing mechanism with the sector 56. Each of the numeral type keys 25 is provided with a pendent link 70 which co-operates with an arm 72 on a corresponding rock shaft 73, the movement of which on depression of a key in a known manner depresses a cross link 74 to set the corresponding pin 75 of the cross totalizer actuating racks 76. To set a subsidiary totalizer for subtraction a key 103 is operated and through a link-mechanism causes the cross links 74 to set up complementary pins in known manner. A group of racks 76 is provided for each of the cross totalizers A, B, C, and D. The entry of the amount set on the rack bars 76 is effected by the depression of a motor start key 85 the motor being adapted to drive a reciprocating bar 86 in the known manner. The movement of the rack bars for setting purposes is under the control of sets of dogs 77 on the carriage co-operating with tappets 79 connected to thrust links 81 and mechanism for moving the bars 76 forward to operative position. The dogs 77 have operating teeth 78 placed at different positions and the tappets are of corresponding length so that a dog with two or more teeth will operate a corresponding number of tappets in known manner. In Fig. 5 the dogs 77 are arranged so that the amounts in the third, ninth, and twelfth column are cross totalled in subsidiary totalizer A and amounts in columns five, seven, ten, and eleven are added in totalizer B. These totals are entered line by line in column totalizers 22, 23 and accumulated as a total in totalizer C. The amounts entered in totalizers 10-21 may be concomitantly added in totalizer D to serve as a grand total. The entries in totalizers 22, 23 and the clearing of totalizer C serves as a check on the work done. Devices are provided for varying the functions of the machine. If it is desired to clear the subsidiary totalizer without affecting the master wheel a key lever 110 is manipulated to rock a shaft 111 whereby a pendent cam link 113 presses to one side the links 44 so as to withdraw the slots 115 out from engagement with the pins 116 of a screw adjustment device 117 secured to the levers 27. To render the subsidiary totalizers inoperative without affecting the primary totalizers a lever 118 is operated to press back a link 121 to throw out arms 125, corresponding to the number of subsidiary totalizers, from beneath the selecting dogs 77 to prevent them being raised to operative position at the computing zones. The arms 125 are held out by a latch 127 under the control of the motor operating mechanism. Devices are provided for relatively adjusting the totalizer truck 41 and the rack 96 carrying the dogs 77 so as to secure accurate positioning thereof. The timing of the operation of the type levers 29, the master wheel 46, and the setting of the stop pins 75 is regulated accurately by providing the keys 25, and the levers 27 with screw adjustment devices 144, 117, and 148 respectively. A clear sign impression mechanism and a key full stroke device may be provided as described in Specifications 107,207 and 10902/12, [both in Class 106 (i), Calculating &c.]. A full stroke device for the master wheel train may be provided comprising a ratchet plate 160 on each of the sectors 45 and ratchet blade 161. The carriage may be controlled by tabulating mechanism comprising keys 165 and column stops 167 certain of which may carry tappets 169 to operate a linkage 170, 171, 172 to set the machine to subtraction automatically. Tappets 175 and a linkage 176, 177 may be provided to cause automatic operation of the motor 84. A platen shift key 183 is provided to disconnect the master wheel and secondary totalizer differential mechanism when it is desired to print from the upper type cases on the type bars 29.