Patent GB-671323-A (GB)
Abstract: 671,323. Calculating-apparatus. CENTRE D'ETUDES M.B.A. (MECANIQUE, BALISTIQUE, ARMEMENT). Nov. 18, 1947 [Nov. 19, 1946], No. 30552/47. Class 106 (i). The wheels of a totalizer are freely mounted on a shaft carried in a frame pivoted in a fixed member, the frame being rocked to move the totalizer wheels from an operative position in which they engage actuating racks into an inoperative position where they can be read, and vice versa, the totalizer wheels being advanced to cause transfer, when necessary, during the movement from the operative position. The totalizer wheels 1, Fig. 3, which have numerals formed in relief to act both as indicating and printing means, are secured to pinions 11 free on a shaft 7, Fig. 4, carried in a frame 3<SP>1</SP> fixed to a shaft 4. The latter shaft 4 is rocked by the depression of a key (not shown), to swing the frame 3<SP>1</SP> from a reading and printing position into the actuating position shown in which the pinions 11 engage the actuating racks 22. When in reading position the pinions 11 engage justifying pawls 26. Reading of the totalizer wheels is normally prevented by a shutter moved by a supervisor's key as described below (" zeroizing "). Pointing mechanism. The machine described has several totalizers. The wheels 1, Fig. 10, of each totalizer are adjacent apertures in fixed plates 62, 69. An impression roller 59 has trunnions mounted in slots in a slide 61, the trunnions being pressed against the fixed plate 62 by springs 63 on the slide. To take an impression, the slide 61 is moved to the right by turning a lever 73. The trunnions are thus dragged over the fixed plate 62 until they reach inclines 66 whereupon they are lowered by the springs 63 so that the impression roller 59 is forced against the numeral wheels 1 to print on paper which, with carbon paper, has previously been inserted between the fixed plates 62, 69. The paper cannot be inserted unless a plate 77, Fig. 11, is lowered by turning a shaft 91 by means of a supervisor's key detachably inserted into the end of the shaft. The plate 77 is independently movable lengthwise to permit zeroizing and to uncover the totalizer reading apertures as described below. Transfer mechanism. When a numeral wheel passes through " 9 " to " 0 ", the point 31, Fig. 3, of a cam 12 secured to the wheel moves a transfer slide 27 to the right against spring- action, the slide being retained by a detent 40. A pin 32 of the slide is thus removed from a detent 42, Fig. 4, whereupon a spring 44 causes the detent to engage with a pinion 23 free on the shaft 4. When the' totalizer frame 3<SP>1</SP> is later turned counterclockwise about the shaft 4 to bring the totalizer to reading position, the totalizer pinion 11 rolls on the now-locked pinion 23 to add one unit on to the totalizer wheel. To provide for consequent transfers, a point 30 of the transfer cam 12 moves the transfer slide 27 a short distance to the right when the numeral wheel passes through " 8 " to " 9," this movement being insufficient to cause the slide to be latched by the detent 40. The slide 27 thus generally immediately returns and no transfer to the higher denomination subsequently occurs. If, however, a unit is to be transferred from the next denomination, the slide 27 of that denomination will have been moved to the right. A spring tongue 37 fixed to the lower slide will thus be the slide 27 of the present denomination when that slide is advanced by the " 8 " point 30. A transfer to the higher denomination is thus prepared, although the wheel of the present denomination is standing at " 9." Zeroizing. This is effected in known manner by rotating the numeral-wheel shaft 7, Fig. 4, by a supervisor's key inserted in a hole in the end of the shaft. Where there are several totalizers the shafts 7 are driven for zeroizing by a common toothed rack driving the shafts through pinions and one-way clutches, the toothed part of the rack having gaps normally adjacent the pinions so that the totalizers may be individually zeroized by the supervisor's key. The rack is reciprocated by a pinon turned by a supervisor's key. Before zeroizing the pawls 26 are disengaged by rocking the shaft 24. All the shafts 24 may be rocked simultaneously by means described below. To prevent unauthorized zeroizing, a guard-plate 77, Fig. 11, normally obturates the ends of the shafts 7. The plate 77 is shifted to bring apertures 77<SP>1</SP> therein opposite the ends of the shafts by inserting a key in the end 83<SP>1</SP> of a sleeve 83, splined to a shaft 83a, pushing the sleeve inwards to cause a cone 84 to rock a latch 86 free of a plate 82 on the shaft 83a of the sleeve, and then turning the sleeve and shaft to move the plate by a pin-and-slot 81. The shaft 83a has an arm which moves an apertured plate normally obscuring the numeral wheels, apertures 76<SP>1</SP>i in the plate then revealing the said wheels. The main locking-shaft 94 of the machine carries an arm 95 which moves a spring-pressed plate 96 so that slots in the plate lock the sleeves 91, 83 which must be operated to permit insertion of the paper and to allow zeroizing, respectively. Specification 617,346 is referred to.