Patent GB-686524-A (GB)
Abstract: 686,524. Calculating-apparatus. BOURINET, R. A. June 17, 1948, No. 16289/48. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 18, 1948.] Class 106 (i). In a cam-disc and pin-wheel multiplying machine combined with a typewriter, the cam discs are set in a machine operation by pins of an intermediate setting device, multiplicand amounts being set on the latter by transmission mechanisms actuated by the typewriter keys which may also control the setting of a series of denominational racks in accordance with the digits of a multiplier. Driving mechanism. An electric motor M, Fig. 13, drives a sleeve 86 through gearing and a friction clutch 87. The sleeve 86 is toothed and forms the driving member of a main clutch, the driven disc 91 of which carries a pawl 92<SP>1</SP> to engage the teeth when released by a latch 93 operated by a starting lever 155 through a link 156. The lever 155 also controls contacts in the motor circuit. A shaft 88, to which the disc 91 is secured, carries an eccentric 96, by which a main shaft 58 is oscillated during each cycle, and a notched driving member 98 of a one-revolution clutch. A driven disc 99 carries a pawl which is released for engagement with the notch by a latch as described below. Since the notch is normally just out of register with the pawl, the driving member makes a revolution before the driven member is engaged. The disc 99 is secured on a shaft 100 which drives, through selectively reversible gearing under the control of a subtraction key, the pin-wheel drum 107. Multiplicand setting. The multiplicand is set digit by digit on the figure keys D, Fig. 2, of the typewriter, appropriate denominationselecting keys T being simultaneously depressed. Each key T depresses a corresponding rod C to act as a stop for an abutment E on a pivoted frame 16 which is released to swing against the stop by a push-rod 47 operated by depression of any key T and disengaging a pivoted rack 48, Fig. 13, from a lug 22 on the frame. Depression of a figure key D actuates a corresponding rod 10, Fig. 1, connected to a corresponding setting rod 14 slidably mounted in the frame 16. The rods 14 co-operate with a setting device 52 pivoted on the shaft of the pin-wheel drum 107 and comprising denominational rows of pins 53. The operated rod 14 pushes in the corresponding pin 53 which is locked by a detent slide 54. Multiplier setting. Prior to the setting of a multiplier, a bar 25, Fig. 1, is depressed so as to couple rods 24 operated by the figure-keys with rods 30 respectively coupled to rods 32. When a figure-key is actuated, the corresponding rod 32 rocks a lever 33, Fig. 5, the end of which is raised to form a stop for one of a set of spring-loaded racks 37, the retaining catch 39 of which is released by a lever 34 rocked by operation of any rod 32 except that corresponding with zero. When any rod 32 is depressed, an escapement 38 is operated so that a laterally-movable carriage 36 carrying the multiplier racks 37 moves one step to place the next rack in the setting position. Multiplication. Depression of a multiplication key rocks a lever 163, Fig. 13, to release catches 164, 165 from levers 128, 131. The catches serve to rock the starting lever 155 through a member 166 and a shaft 154. During the first cycle of the mainshaft 58, an arm 59, Fig. 3, fast thereto rocks an arm 62, a pin 60 in the arm 59 engaging a hole in the arm 62. The setting device 52 is coupled by a link 82 with the arm 62 and is thus rocked to set the cam discs according to the multiplicand. A further link 82a engages at the same time a projection 16a of the frame 16 so as to restore the latter. During the forward stroke of the arm 59, a cone 78 on a spring-loaded plunger is drawn from a guide by a link 69 and is then held by a latch 76 in its outer position. Thus,!as the arm 62 is restored, it is pushed away from the arm 59, is disengaged from the pin 60, and is held in its shifted position by a latch 73. As the setting- device 52 is restored, lugs 56, Fig. 2, on the locking members are operated to release the depressed pins 53 and a lug 52a, Fig. 7, on the frame engages a catch 138 to release a lever 136 and enable a member 146 to lock the cam-discs in known manner. Unless the lowest-order multiplier rack is in its zero position, the lever 128, Fig. 13, is rocked clockwise by a spring and through a link 127, lever 126 and rod 147, withdraws the stop of the one-revolution clutch 99. Thus, after the initial multiplicand-setting cycle, the pin-wheel drum is rotated to add the multiplicand into a totalizer A. During this add cycle, a crank 109 on the shaft of the drum operates, through a link 110 and cranks 111, 113, a bar 114 (see also Fig. 5), which restores the operative multiplier rack by one step. The add cycles continue until the rack is fully restored when it rocks the lever 128 to render the stop for the one-revolution clutch effective and also to re-couple a roller 118 carried by a rod 119, which is mounted in a guide on the lever 126, with a lever 121. The rod 119 is pivoted to an arm 70 on the shaft 58 and, therefore, rocks the lever 121, a pawl 122 on which co-operates with a rack 43 on the carriage 36 to advance the latter by one step. A second pawl 123 on the lever 121 simultaneously advances a rack 169 on the totalizer carriage, the pawl being freed for engagement with the rack by the release of the lever 131, to which it is connected by a lever 168 and link 167. This process is then repeated automatically until all the multiplier racks have been restored, the last rack causing the lever 128 to be re-engaged by its latch 164. The carriage 36 is then stepped once more by the lever 121 and engages a screw 135, Fig. 7, in a rod 134 which restores the lever 136, latch 138 and member 146 so as to unlock the cam discs. The carriage also engages a pin in a lever 71, Fig. 3, which allows an arm 66 to slide along the shaft 58 under the action of a spring to be engaged by the pin 60 in the arm 59. The arm 66 then rocks a bar 120 by means of a link 117 to restore the cam-discs. During the return of the arm 66, it rocks the latch 73 and, by means of a link 75, releases the latch 76 of the plunger 78. The arm 62 is thus restored to the left by its spring and by engaging a pin 61 in the arm 66 also pushes the latter leftward until it is relatched by the lever 71. A lug 65 on the sleeve of the arm 62 restores the starting lever 155 and so opens the motorcircuit and disengages the main clutch 91. A pin 172 on the carriage 36 engages the lever 131 with its catch 165. A rod 173 connected to the lever 168 withdraws a pawl 159 from the totalizer rack 169 so that the latter is restored. Depression of a " Discount " key withdraws a pawl 174 so that the totalizer, when restored, stops in an appropriate position. Addition and subtraction each require three cycles, in the first of which the amount is set on the pin-wheels, after being set as a multiplicand is set. In the second cycle, the pinwheel drum is rotated in the additive or subtractive sense, and in the final cycle the parts are restored. Auxiliary totalizers. Totalizer pinions B, Fig. 2, forming together one or more totalizers, are carried in a laterally movable carriage mounted in a frame 189. Depression of a key 217 releases an arm carrying a roller for engagement in a cam slot when the machine is operated, so that the frame 189 is rocked to engage pinions 191, in mesh with the totalizer pinions B, with the gears 185 which drive the pinions of the totalizer A. Thus an amount entered into totalizer A will be entered in the reverse sense into totalizer B. The depression of a further key, Fig. 12A (not shown), lowers the frame 189 to mesh the pinions B directly with the gears 185 so that amounts are entered in the same sense in both totalizers. Tens transfer in the totalizer B is effected by a drum 190 having spirally-arranged pins and rotated, according to the direction of rotation of the pinions B, under the control of a further key, Fig. 12 (not shown), by one or the other set of teeth on a motor-driven rack. By reading the totalizer A and setting the amount, and by suitably operating the above-mentioned control keys, the total may be transmitted to a selected set of the totalizer pinions B. In a similar manner, amounts may be transmitted from the pinions B to the totalizer A or added into, or subtracted from, both totalizers simultaneously. Clear marks. When the totalizer A is at zero (the lowermost two digits which are not visible being ignored), a " star " key is free to be operated to print a star against an amount substracted from the totalizer to zeroize it. A similar " star " key is provided for the totalizer B. Carriage control of machine functions. A removable bar carrying adjustable lugs is secured to the paper carriage, the lugs operating, in different columnar positions, bell-cranks 178, Fig. 13, to control the machine functions in known manner.