Patent GB-379822-A (GB)
Abstract: 379,822. Calculating- machines. MERCEDES BUROMASCHINENWERKE, AKT. - GES., Benshausen, Germany. July 22, 1931, No. 20943. Convention date, Aug. 23, 1930. [Class 106 (i).] Adding and subtracting apparatus; totalizing counters.-In a calculating- machine having column totalizers readily attachable to and detachable from a moving paper carriage, the totalizers have two sets of wheels gearing with the numeral wheels, the sets being selectively connectible in the drive from the differential actuating wheels so that the numeral wheels may be operated either additively or subtractively. Transfer mechanism and means attached to the removable column totalizers for controlling the operation of other totalizers (e.g. line totalizers) are also described. The side walls of the totalizer have hooks 47, Fig. 1, engaging a bar 48 secured to the paper carriage. Pivoted within the totalizer is a lever 49 to which is attached a part 54, Fig. 4, acted on by a spring 58. Hooked parts 51, 57 engage the top of the bar 48 and a projection 52 engages a rack 53 fixed to the bar 48 to prevent the totalizer sliding relatively thereto. The lever 49 is locked by the engagement of its end 66 over a latch 69 on a slide 68 pulled to the right, Fig. 1, by a spring 76. To remove the totalizer, projections 63, 78 on the lever 49 and slide 68 respectively are pressed together, the latch 69 then moving from beneath the projection 66 and allowing the lever 49 to swing in a clockwise direction to remove the hooks 51, 57 from the bar 48 and the projection 52 from the rack 53. Conditioning the totalizer for addition and subtraction. Rockably mounted on a shaft 91e supported in the machine is a frame carrying sets of pinions 91a, 91b, 91c, one such set being provided for each denomination. The numeralwheel pinions 93 are in gear with sets of pinions 91, 89. When the totalizer is to add the frame is swung, by means not shown, in an anticlockwise direction so that the motion is transmitted from the main differential-actuating wheels 91h through pinions 91a, 91b, 91c, 91 to the totalizer pinions 93. The frame is swung in the opposite direction to condition the totalizer for subtraction, the motion then passing through pinions 91c, 91b, 91a, 89, 91. Before an operation is commenced, a detent 95 mounted in the totalizer and engaging the teeth of all the pinions 89 is swung to the left about its pivot 83 against a spring 101 by the movement of a lever 103a in the machine. Transfer mechanism.-Secured to each pinion 89 is a wheel having one tooth only which, once in each revolution, lifts the end 85 of a lever 80 pivoted at 79 and causes a lug 80a of the lever 80 to act on a second lever (not shown) and so to advance the next higher numeral wheel. The lever 80 is normally held in contact with a rod 83 by a spring 10. During a total-taking operation, this lever 80 is locked by a bar 84c. Control of other totalizers. Pivoted in the front of the totalizer are four levers 31, 37 each of which can be set by hand into any one of three positions. A pawl 35, Fig. 3, retains each lever in its set position, the pawls being locked by turning a half-round rod 38 by means of a knob 40. The levers each act on a corresponding lever 31d, pivoted at 31c, two of the four levers 31d controlling a line totalizer for addition, subtraction, total and sub-total taking. The other two levers similarly control another line totalizer.