Patent GB-412747-A (GB)
Title: Improvements in electric adding machines
IPC: G06F7/42
Filed: 1933-05-11
Abstract: 412,747. Calculating-machines ; transfer mechanism. BOUTET, R. E., 8, Square Desaix, Paris. May 11, 1933, No. 13759. Convention date, July 8, 1932. [Class 106 (i).] An electric adding- machine comprises a first group of ten circuits for each denomination, a second group of circuits, electromagnets controlling the connection of the first group to the second through a third group, each first circuit being connected to that second circuit corresponding to the figure representing the sum of the first-circuit value and the value of the electromagnet energized, keys being provided to close the first circuits, the electromagnets being so situated in the second circuits that, upon closure of a key a circuit is established for the electromagnet representing the summation, as far as the units denomination is concerned, of the figure corresponding to the depressed key and the amount previously standing on the machine. Fig. 1 shows the circuit diagram for one denomination. Let it be assumed that the machine is registering "4"; a switch L4 is in these circumstances closed to connect lines C1, C2 .. to lines D5, D6 .. respectively. If now the " 2 " key TA2 be depressed, the line C2 is energized and, through switch L4, energizes line D6 connected to an electromagnet E6 which closes a switch L6. The switch L4 is released by a mechanical device and the indication "6" is displayed by means controlled by the switchblock L6. If " 8 " is added to "4", the depression of the TA8 key causes the closing of switch L2 and the registration of " 2 " as just described. Key TA8 also energizes a circuit C<1> A8 connected through a switch L'4, integral with L4, to a line CR in which is an electromagnet 11 adapted to close a switch 12 in a circuit which can effect the depression of the " 1 " key of the next higher denomination, thus causing transfer. The Specification as open to inspection under Sect. 91 describes also a modification, Figs. 6 (Cancelled) and 7 (Cancelled) wherein, if the machine is registering "7", a bar A carrying ten pairs of contact blades a stands in the position shown. The blades connect bars C0, C1, C2 .. , energized by the depression of corresponding keys " 0 ", "1", "2" ..., to studs connected to lines D0, D1, D2 .... In the " 7 " position, the CO bar is connected to line D7, C1 to D8, &c. The bar A is secured to a rack 38 engaging toothed numeral wheels 40. Each line D0, D1 .. is connected to a winding E0, E1 ... on an electromagnet 30. If the " 2 " key is now depressed, current is supplied to bar C2, line D9 and winding E9, a core 36 moving adjacent to winding E9. A stud P9 is then energized through blades 32 from a bar 33 and, when an "operating" key is depressed, is connected to a winding E<1>9 on an electromagnet. A core 35 connected to the bar A then moves to the E<1>9 position, the "9" connections are made between lines C0, Cl .. and D0, D1 ..., and the numeral wheel 40 registers "9". The bar A has an extension A<1> provided with fingers b<1> carrying at their ends contacts engaging with bars C<1>1, C12 ... energized when corresponding keys "1", " 2 " ... are depressed. The bars C<1>1, C<1>2 .. are of different lengths and if the bar A is in such a position that, when a certain numeral key is depressed, a transfer is necessary, then a circuit will be completed from the particular bar C<1>1, &c., through a finger b, the bar A<1> and a finger r to a bar CR which controls the transfer in the same manner as does the line CR, Fig. 1. This subject-matter does not appear in the Specification as accepted.