Patent GB-347119-A (GB)
Title: Improvements in or relating to record card controlled calculating machines
Filed: 1929-10-14
Abstract: 347,119. Statistical apparatus. KALSBEEK, A., 8, Bronckhorststraat, Amsterdam. Oct. 14, 1929, No. 31107. Convention date, June 26. [Class 106 (i).] A record-card controlled tabulating machine having a main calculating mechanism for adding the items of a group of cards and means for transmitting the total of a group of cards to a printing mechanism is provided with an auxiliary calculating mechanism adapted to be actuated to accumulate totals of the card groups by means co-operating with the reading- out devices of the main totalizing mechanism. The machine comprises a main totalizer of the Hollerith type as described in Specification 216,142, [Class 106 (i), Calculating &c.], with the usual total-taking or reading-out devices as shown in Figs. 1 and 3. In the known manner the reading-out devices serve to energize the printing magnets and according to the invention control the operation of the clutch mechanism associated with the totalizer pinions of the auxiliary calculating mechanism as shown in Fig. 4. The auxiliary totalizer is provided with reading-out devices similar to those shown in Fig. 3 whereby the printing magnets may be energized to print a total therefrom. In the operation of transmitting a total an oscillating movement is imparted to the arm 51, Fig. 3, and the levers 56 moved until the screws 57 contact with the total cams 12. During the movement of the arm 51 the insulated bar 54 and contact springs move upwardly and sooner or later according to the position of the levers 56 a circuit is completed through the contacts 55, 60 and the totalizer magnets 11, Fig. 4 of the auxiliary mechanism. Energization of these magnets actuates corresponding clutches 66 which are thereupon coupled to a driven shaft 68 and actuate the numeral wheels 13 of the auxiliary totalizer. The shaft 68 is driven from the auxiliary shaft 14, Figs. 1 and 5, which itself is adapted to be driven from the main reset shaft 22 by a pinion 14<1> and a mutilated wheel 23, the drive from the wheel 23 being effective during the second half revolution of the shaft 22. The printing mechanism associated with the main calculating mechanism is connected by a forked lever 86, Fig. 6, to the printing shaft 82 of the auxiliary calculating mechanism. The shaft 82 is composed of two parts normally disconnected, a clutch 83 being provided to couple the two parts by the manipulation of a lever 84. This lever cooperates with two commutator switches 40, 73, the former having sixteen contacts, eight for each of the denominational elements of the main and auxiliary totalizers and the latter having a single contact strip. In the central position of the handle, Fig. 6, the strip contact is in circuit and the eight contacts for the main totalizers are connected to the printing mechanism. When the handle is moved to the right the strip contact is disconnected and the eight contacts for the auxiliary totalizer are connected with the printing mechanism. The circuit arrangement is shown in Fig. 2 ; with the commutator 73 in circuit closing position, the amounts read from the reading-out devices 121 .. 12<8> of the main totalizer are transmitted from the positive side of line through the contact table 39, contacts 77<1> .. 778 to magnets 11<1> .. 11<8> of the auxiliary calculating mechanism and through contact strip 73 to the negative side of line. At the same time the eight contacts associated with the main totalizer energize the printing magnets 43<1> .. 438. When a total is to be read from the auxiliary totalizer the lever 84 is operated to disconnect the contact strip and connect up the eight contacts for the auxiliary mechanism on the commutator 40. A circuit is completed from the positive side of line through the contacts 811 .. 818 of the auxiliary totalizer to the printing magnets 43<1> .. 43<8> to the negative side of line. The mechanism described is particularly adapted to compute interest accounts by calculating the interest every day on the balance of that day.