Patent GB-372578-A (GB)
Abstract: 372,578. Multiplying- apparatus. RHEINISCHE METALLWAAREN - UND MASCHINENFABRIK SÍMMERDA AKT.-GES., Sommerda, Germany. June 4, 1931, No. 16308. Convention date, June 5, 1930. [Class 106 (i).] Attachments to typewriters.- An automatic multiplying- machine is combined with a type - writer, card - punching machine or other record-ing- machine in such a way that an amount set on the recording- machine keyboard is first transmitted to an intermediate setting device from which it is subsequently entered selectively into either the differential actuating mechanism or the multiplying apparatus. In the embodiment described, an amount is typed by a typewriter in one column of the work sheet, simultaneously set up in the intermediate device, and subsequently transmitted to the differential actuators for use as a multiplicand, a second amount is typed in the next column and set up in the device, descriptive matter is typed in a third column while the second amount is transmitted to multiplying devices for use as a multiplier and the automatic multiplication is effected, the product being then read off the totalizer and typed in the fourth column. Setting the multiplicand. When the type-writer carriage 19, Fig. 19, is in the proper position a projection 20 thereon depresses a cam 24a on a bai 24 and causes the lowering ot a bar 24b, Fig. 2, to allow bars 5 connected to the typewriter numeral keys 1 to come into the plane of levers 8. The depression of a key 1 will then cause the raising of a pin 10 in a carriage 9 and the stepping along of the carriage by a system of levers 17, 16, 14 and a pawl, not shown. When the carriage 19 reaches the beginning of the second column, a second projection vertically below the projection 20 depresses a cam 21a and, through connections 21b, 21c, draws forward a slide 27. This slide carries with it a second slide 28, Fig. 6, a projection 29 of which closes the circuit of a motor 30 and a second projection 28a operates a clutch 56. The slide 27 also moves to the right a link 61 and causes the transmission of the amount set on the pins 10 of the setting carriage 9 into the differential actuators and the resetting of that carriage in the manner described in Specification 370,662. Setting the multiplier. The cam 24a is held depressed while the typewriter carriage 19 is in the second column so that amounts typed therein are also set in the setting carriage 9. The movement of the typewriter carriage to the end of the second column releases the cam 24a and causes the depression of a cam 22a which, through connections 22b, 22c moves a slide 37, a hook 37a of which draws with it the slide 28. The motor 30 is then started and the clutch 56 operated, a connection from the slide 37a causing the transmission of the amount from the pins 10 into the wheels controlling the multiplying operation and the resetting of the carriage 9 as described in the above-mentioned Specification. Automatic multiplication operation. The movement of the typewriter carriage 19 to the third column causes the depression of a cam 23a connected by parts 23b, 23c to a slide 42, Fig. 9. A projection 42d of this slide completes the motor circuit, a second projection 42b operating a clutch 43. The multiplication then proceeds automatically in the manner described in Specification 370,662, the drive from the motor being transmitted through differential gearing 44 to the main actuating shaft, a carriage-shifting shaft 49 being given one revolution as each multiplier wheel is returned to zero. When the calculation is completed, a cam on the rack 75a of the calculating machine carriage lifts a retaining pawl 54 and allows a spring to return the totalizer carriage to its initial position and another spring to retract the slide 42. The Specification as open to inspection under Sect. 91 (3) (a) states also that the product may be cleared automatically from the calculating- machine totalizer when it is being typed. This subject-matter does not appear in the Specification as accepted.