Patent GB-342044-A (GB)
Abstract: 342,044. Calculating-apparatus. FRIDEN, C. M. F., 15, Caperton Avenue, Piedmont, California, U.S.A. Nov. 21, 1929, No. 35707. Convention date, Dec. 10, 1928. [Class 106 (i).] Multiplying and dividing apparatus.-In a powerdriven machine with a reversible rotary actuator for performing calculations according to the four rules means are provided for initiating the operation of the machine to perform problems in division automatically. In the form shown several parts of the mechanism, viz the motor drive and clutch mechanism, the reversing mechanism and the manual and automatic control means therefor, the reversible rotary actuators, the totalizing-counter and revolutions or quotients counter, and the overdraft control mechanism are similar to those described in Specification 305,540, [Class 106 (i) Calculating &c.]. According to the present invention the machine is adjusted for performing division by setting the lever 87, Fig. 11, to reverse the direction of rotation of the quotients counter with respect to that of the actuators and by manipulating the lever 91, Fig. 2. The pulling forward of the lever 91 operates a link 94, a pin 96 on which moves a link 55, Fig. 1, and through an arcuate cam member 57 shifts the rod 43 so as to displace the rod 28 through the connection 42 to effect reversal of the actuator. The pin 96, at the same time, engages a lip 112 on a box 99, Figs. 4 and 5, pivoted on links and carrying a pin 106 the downward and rearward movement of which by engaging an arm 107 rocks a shaft 108 to which is secured the bell crank 62, Fig. 27, whereby the clutch lever 18 is operated to cause engagement of the clutch. A roller 121 on one of the links supporting the bar 99 engages a curved arm 118 connected by a link 117 and arm 116 to a pawl 114 adapted to engage a serrated member 113 on the setting units of the actuators to lock them in adjusted position during an operation. The lever 91 is latched in forward position by means of a pawl 124, Fig. 2, engaging a notch 123 in the bar 94. The lever 91 may be released for the purpose of correcting an error by operating a bell-crank lever 127 engaging a lip 126 on the pawl 124, this operation being effected by a pin 131 on a slide 132 cooperating with the clearance key 133, Fig. 4, of the bank of multiplier keys. During a division operation the lever 91 is released automatically, as described below. The bar 94 in its movement, through an ear 145, Fig. 2, engaging the bevelled edge of a slide 143 carrying a rod 142, Figs. 8 and 11, the free end of which works in the slot of an arm 139, imparts movement to the arm 139 to a position to overlie an extension 162 of the lever 161 of the overdraft control mechanism. The arm 139 is pivoted on a lever 136 provided with a lateral extension 137 lying behind and in contact with the transfer arm 6 of the numeral wheel next to that of the highest denomination. When this wheel passes to " 9 " after an excess rotation the lever 136 is rocked by the movement of the transfer arm and through the arm 139 rocks the lever 161. This lever 161 is pivoted on a lever 151 pivoted on the shaft 135 and by the above-described movement projects a pin 158 mounted in the lever 151 into the path of a cam plate 159 secured to the actuator shaft. The lever 151 is operatively connected by a link 152 to an arm of a bell crank 153 the other arm of which engages a collar 156 on the shaft 28. At the moment the actuator is nearing full cycle position the cam 159 engages the pin 158 to rock the lever 151 and shift the shaft 28 to reverse the direction of rotation for one cycle. The clutch is disengaged at the end of this cycle by a pin 166 on a disc 165, Fig. 2, carried by the shaft of the quotients counter engaging the end 173 of a pivoted slide 167 the movement of which through a pin 175 rocks the pawl 124 to free the bar 94 which returns to normal under spring action thereby freeing the bar 99 to permit the clutch lever 18 to open the clutch. In the clockwise rotation of the disc 165 the pin 166 rocks the slide 167 idly. In operations other than division the slide 167 is out of the path of the pin 166 by reason of the engagement of the lower end of the slide with a shelf 174 on a slide 175 having a pin and slot connection with the lever 91.