Patent GB-448925-A (GB)
Title: Electric calculating machine
IPC: G06F7/46
Filed: 1934-12-13
Abstract: 448,925. Calculating - apparatus. BOUTET, L. C., 4, Rue Parchappe, Bois- Colombes, Seine, France. Dec. 13, 1934, No. 10108/36. Convention date, Feb. 14, 1934. Divided out of 448,787. [Class 106 (i)] The inventions comprises the combination of two devices, the first of which converts a British monetary amount into its decimal equivalent as the amount is being entered into a typewriter. The second device converts a decimal fraction, entered on a register as the result of a calculation, into the corresponding British monetary amount. The amount is entered into the first device by a common group of wires 155<0>... 155<9>, Fig. 1, which are associated in turn with the various monetary denominations by switches closed by the typewriter carriage. The device will be described with reference to the conversion of 16s. 8d. to ú.83333. When the typewriter enters " 1 " in the tens of shillings place contacts 150<8> are closed to energize electromagnet 157 which moves switch 158 into the position opposite to that shown. The carriage then moves to the units of shillings place and closes contacts 151<8> which close a switch 159<a>. When the " 6 " key is depressed line 155<6> is energized and connected via 159<a> to electromagnet E<16> which closes switch I<16>. Contacts 152<b> are not closed, since there are no tens of pence. In the units of pence place the carriage closes contacts 153<b> which close switch 168a to connect line 155<8> to an electromagnet G<8> which closes a switch J<8>. Since there are no farthings, contacts 154f are not closed and a switch 163 remains in its normal closed position. A distributer D is then rotated and supplies current to contacts D<1> ... D<6> in turn. Contact D<1> is connected via 171, I<16>, 162<8> and 165<1> to the lead-out line 156<8> which thus registers the digit " 8." Contact D<2> is connected via 172, I<16>, 170 and J<8> to lead-out line 156<3> to enter " 3." D<3> is connected via, 173 and J<8> to 156<3> to enter " 3 " in the third decimal denomination. The contacts D<4> and D<5> similarly cause the registration of " 3 " in the fourth and fifth decimal denominations respectively. The conversion of decimal into monetary amounts. The second device, Fig. 2, is connected to a register 200 described in Specification 448,787 on which the figures of the decimal amount are registered by the closing of a corresponding contact in each of the denominational columns. In the example given, À875 on the register is converted into 17s. 6d. To effect this conversion, a distributer D is rotated to supply current to contacts D<1> ... D<7> in turn. D<1> energizes 206<1> to close 207<1>, and also energizes line 204<8>, since " 8 " is set in the third denomination of the register 200. Line 204<8> is connected via 207<1> and 208<1> to lead-out 209<1> to register 10s. D<2> energizes 206<2> to close 207<2> and also energizes 204<7> through the second denomination of the register 200, 204<7> being connected via 207<2> to 211 which closes 212. D<3> again energizes 204<8> through the third denomination of the register 200, 204<8> now being connected via 207<3> and 212 to leadout 209<7> to register 7s. D<4> then closes 207<4> and also causes the re-energization of 204' connected via 207<4> to 214<2-7> which energizes 215<2-7> to close 216<2-7> and 218<2-7>. D<5> next causes the energization of 204<5> from the first denomination of the register 200 and also closes 207<5> to connect 204<5> and 218<2-7> to lead-out 209<6> to register 6d. Contacts D<6> then reenergize 204<5> now connected via 207<6> and 216<2-7> to lead-out 209<0>, since there are no farthings in the amount concerned. Had the monetary equivalent of the original decimal fraction contained farthings, these would be registered, during the closure of D<6>, upon lead-out lines 209“, 209¢, 209¥.