Patent GB-473265-A (GB)
Title: Improvements in or relating to calculating machines
IPC: G06C7/10
Filed: 1936-01-06
Abstract: 473,265. Calculating-apparatus. BILDE, T. E. D. Jan. 6, 1936, No. 444. Convention date, Jan. 4, 1935. [Class 106 (i)] In a calculating machine of the ten key type having setting pins arranged in denominational groups in a displaceable carriage, the pins of each group are arranged in a plurality of rows. As shown in Figs. 1 and 4, the setting pins 4 of each denominational group are arranged in three rows in a carriage 6 slidably mounted on a support 61. Depression of a key 1, through a bell-crank 2 and plunger 3, projects the associated pin 4 of the group then in setting position. Depression of the key also effects the displacement of the carriage by the rocking of an escapement pawl 13 connected, through the linkage shown, to a plate 21 lying beneath all the key stems. After all the digits of an item have been set up, differential actuators 15 are driven and arrested each actuator being provided with three abutments 23 ... 25 situated one in the plane of each row of the associated group of pins. The pins are restored by a ramp during the return movement of the carriage, the ramp being rocked as the carriage reaches home position to restore those pins which are then situated adjacent to it. In the construction of pin shown in Figs. 5 and 6, the movements of the pin are restricted by shoulders 29 engaging the walls 6a, 6b of the carriage, and the pin is restrained in set position by a sinuous spring 30 engaging the wall 6b. The Specification as open to inspection under Sect. 91 describes the application of the invention to an adding and subtracting machine, Fig. 10 (Cancelled). Groups of setting pins 30 in a carriage 35 are actuated by plungers 24 upon the depression of the keys 17 of a single bank, in the manner already described. Differential actuators 39, each having three abutments 151, 152, 153 for co-operation with the rows of pins of the associated group, are capable of slight longitudinal movement relative to driving members 37 carrying type 38. Upon the energization of a motor 191 or the depression of an operating lever 8, a bail 9 is raised in longitudinal slots 19 in all the driving members and, upon abutment with shoulders 148 on levers 146 pivoted one to the lower end of each driving member, lifts these members until their actuators are arrested by the projected setting pins. Each driving member continues its upward movement until a projection 41 on its arrested actuator is out of alignment with a nose 42 on a lever 143 coupled to the associated lever 146. The bail 9 now wipes past the shoulder 148 and in so doing rocks the lever 146 counterclockwise to project its arm 147 into one of a series of registering apertures in a plate 159. Printing is effected by rocking the actuators, driving members and the registering plate as a unit about a shaft 161 to impress the type against a strip 196 passing around a roller platen 181. The driving members are returned with their actuators upon the downward movement of the bail 9 by its abutment with shoulders 150 on the levers 146. A totalizer 164 is rockable into engagement with racks on the actuators being engaged during the upward movement of the actuators in subtraction operations and during the downward movement in addition operations. Totals may be taken under the control of the transfer teeth of the totalizer in usual manner. In a modified form, Fig. 13 (Cancelled), the keys 17a co-operate directly through levers 24a with the setting pins 30a which in turn co-operate with rotary actuators 57a carrying type 126. As the pin carriage is displaced, grooves on the setting pins take over guides 111 whereby the pins are positively held in normal or projected position during the machine operation. If desired the levers 24a may be mounted for universal movement to enable each lever to act as a connection between a plurality of keys and their associated pins. In a further modification, Fig. 15 (Cancelled), the actuator is constructed as a chain, the links of which carry the type and the abutments 123, 124, 125, selected type being projected by a hammer 121. This subject-matter does not appear in the Specification as accepted.