Patent GB-474543-A (GB)
Abstract: 474,543. Calculating-apparatus. WANDERER - WERKE VORM. WINKLHOFER & JAENICKE AKT.-GES. Sept. 21, 1936, No. 25622. Convention date, Oct. 8, 1935. [Class 106 (i)] In a machine having an adding and subtracting totalizer provided with a mechanism for inserting the " fugitive one " and with means for giving a clearance sign, the operation of the mechanism to insert the " fugitive one " when the totalizer content reaches or passes through the zero position automatically controls the position of setting members to allow or prevent operation of the clearance sign impression mechanism. The invention in one form is shown applied to a typewriter calculating machine with a totalizer 6, Figs. 5 and 5a, mounted on a carriage and movable step-by-step into operative engagement with an actuating master wheel 9. The wheel 9 is arranged to engage the pinions 1 and the movement, in accordance with the key depressed, is transmitted by intermediate pinions 2, Fig. 1, to the add and subtract pinions 3 and 4 respectively. The pinion 1 corresponding to the highest denomination is operatively connected with a segment 41, Fig. 6, through a Maltese pinion 38. The segment 41 is secured to the shaft 5 and the shaft carries at its other end an arm 43 with a pin 15, Figs. 4 and 6, engaging a slot 16 in a pawl member 17 pivoted on an axis 18 in a bell-crank 19. The pawl 17 has two arms 31, 32, Fig. 4, which in one or other position co-operate with pins 33, 34 on a segment 35 rotatably mounted on the shaft 5. The segment is operatively connected to the units pinion 1 by a Maltese pinion 36. On the return of the typewriter carriage to normal position the bell-crank 19 engages a fixed cam surface 28-30, Fig. 5a, and is thereby rocked to cause the pawl to rock the segment 35 in one or other direction to effect the addition or subtraction of a unit. At the same time teeth 45 on the segment rotate a pinion 44 to operate a shutter mechanism 23, 24 to render visible the appropriate set of numeral wheels 10 or 11. The shutters 23, 24 are provided with projections 73, 74, Fig. 7, forming setting members for co-operation with testing comb-shaped members 50, 55 arranged to engage the teeth of the pinions 3, 4, and operatively connected to levers 63, 64. During the return movement of the carriage the lever 63 or 64 engages a surface 69 on a lever 66 pivoted on a pin 65 carried by a lever 70 pivoted on a pin 67. If one of the levers 63 or 64 is free it will be raised by the surface 69 into the path of the cam end of the lever 70 thereby imparting a rocking movement to the lever which is utilized to effect the release of the clear sign impression mechanism or to depress the clear sign key directed. The lever 63 or 64 is allowed to move only when the pinions 3 or 4 are in the zero position as determined by the position of the short teeth 48 or 49, and when the shutters are in such a position that the setting projections thereof are out of the path of movement of the testing members 50 or 55. In a modification, Fig. 13, the setting members instead of forming part of the shutters are constituted by a member 81 loose on the shaft 5 and having a pin 82 which in one or other position cooperates with projections 83 or 84 on arms 153, 154 of the levers 63, 64. In another embodiment, Fig. 15, a single lever 92 is substituted for the levers 63, 64 and this lever is connected to a slide 89 guided on a pin 91. The slide is formed with a surface on which bears a pin 87 of a testing member 85 that is pivoted to the lower end of an extension of the member 43 carrying the pin 15. The setting members are constituted by projections 93, 94 on the segment 35. In the form shown in Fig. 22, the position of the setting members 193, 194 and testing member 185 is reversed with respect to that of Fig. 15, To prevent the insertion of the " fugitive one when the capacity is exceeded, the pinion 1 of highest order is provided with a notched disc 100, Figs. 23 and 24, that co-operates with a roller 102 on a slide 103 guided on a lever 108 attached to the shaft 5. When the totalizer content passes through zero the roller 102 enters one of the notches and the slide 103 is moved clockwise in Fig. 23 until its upper end bears against the edge 111 of a stop 112. During this movement, the shaft 5 is operated to displace the pin 15. Further passage of the highest pinion through zero in the same direction has no action on the slide 103.