Patent GB-473624-A (GB)
Abstract: 473,624. Calculating-apparatus. SOC. ANON. SANDERS. April 17, 1936, No. 11042. Convention date, April 18, 1935. [Class 106 (i)] In a machine having a plurality of totalizers, any one of which is selected for operation according to a predetermined sequence by the movements of a travelling paper carriage and wherein a single total-taking control key is provided for all the totalizers, the totalizer selecting device comprises a member which is arranged to move stepwise by an escapement mechanism controlled in both directions of movement of the carriage by a single member co-operating with stops on the carriage. The invention is shown applied to a machine as described in Specification 442,538 and wherein a totalizer is engaged with the differential actuating racks by rocking a shaft A, Fig. 1, an arm M of which is operatively connected through a bell-crank V to an operating bar 130 when a slide P is displaced by the associated stop on the paper carriage. In the machine described, six slides are provided, two of which P<3>, P<4> are shown in Fig. 2. On the ends of the slides bear arms 3, 4 pivoted to an axis 5 and formed with extensions carrying rollers 8, 9. These rollers lie in the path of movement of helically disposed teeth 13, 14, and 15 of a selector plate 12 secured to a shaft so that, when the plate is allowed to move counterclockwise under the action of a spring 16, the arms 3, 4 are operated to displace the slides P successively. The plate 12 is formed with stepped teeth 17 that co-operate with a slide 18 connected to an arm 20 integral with a toothed sector 21 controlled by the carriage tabulating movements. Associated with the sector 21 is an escapement pawl 28 with teeth 30, 31, Figs. 2 and 2a, which pawl is pivoted to a link 27 having a pin 42 extending through the pawl 28 and engaging a lever 41 on a stud 32 to hold the tooth 31 normally in disengaged position. The lower arm of the lever 41 has a bevelled edge co-operating with a pin 43 on a slide 33. - The slide 33 is attached at its upper end to a'link 36 and the upper ends of the links 27, 36 are connected to levers 24, 25, Fig. 3, on which rests two of the arms of a three-armed lever 23 mounted in the path of movement of stops 95 on the carriage. The slide 33 has an upper camming edge 370, Fig. 2a, that cooperates with the stud 42 and a lower camming edge 371, Fig. 2, that co-operates with a pin 38 on a detent pawl 39. The plate 12 is normally locked against movement by a stud 47 thereon engaging a locking lever 45, Fig. 4. When the machine is operated a shaft 53 is first rocked and through an arm 52 and linkage 48, 49 the locking lever 45 is operated to free the plate 12. When a stop 95 encounters the lever 23 it is rocked clockwise to rock the lever 24 and thereby raise the link 27 and through the pawl 28 to impart a one step movement to the sector 21. This movement displaces the slide 18 thus releasing the selector plate 12 for a step movement. In the return movement of the carriage the sector 21 is restored to normal position by the stops 95 successively actuating the lever 23 to rock the lever 25 and raise the link 36 and slide 33. During the upward movement of the slide 33 the cam portion 371 disengages the detent pawl 39 and the cam portion 370 through the pin 42 withdraws the tooth 30 and engages the tooth 31 permitting the sector to take a half step movement in the reverse direction. Immediately after the slide 33 returns and the stud 43 acts on the lever 41 to withdraw the tooth 31 allowing the sector to complete its step of movement. The selector plate 12 is brought back to initial position under control of the travelling carriage by a known mechanism, the movement of the plate 12 preceding that of the sector 21. The totalizer selected in the different carriage positions is indicated by a numbered plate 138, Figs. 6 and 7, on a pivoted sector 133 connected by a link 134 to a rack 135 in mesh with a toothed sector 137 integral with the plate 12. Manual selection of totalizers. To select a totalizer at will a lever 121, Figs. 5 and 7, is provided. This lever is secured to a sector 120 with a numbered plate 130 and having an arm 118 connected by a link 117 7 to a slidable plate 110 with rollers 108, 109 adapted to co-operate with projections 106, 107 on arms 103, 104 pivoted in scissors fashion at 105. The opposite ends of the arms 103, 104 engage extensions 101, 102 of the arms 3, 4 so that when one is actuated the corresponding slide P is displaced. To prevent incorrect manipulation, the lever 121 and control handle 132 of the sector 133 are provided with locking means. When the automatic or carriage selector is operative a pin 141 on the arm 118 of the manual selector engages a notch in a lever 143 to hold the lever 121 against movement. The lever 121 is freed when the sector 21 reaches its normal position by a pin 148 thereon engaging a projection 147 on the lever 143 and rocking it to release the pin 141. If the sector 21 is out of home position, the handle 132 is moved into the " D " position during which movement the link 134 is moved to engage by its projection 152 a stud 153 on the lever 143 which is raised to free the pin 141. At the same time a stud 150 on the lever 143 engages a notch 151 in the link 134 so as to lock the handle 132 against movement ; rocking of the lever 143 is prevented by the pin 141 engaging the curved parts 154, 154<1> of the lever. Total-taking. The total key 54, Fig. 4, is depressed and the levers 63, 65 are rocked to condition the machine for a total-taking operation. At the same time a stud 67 on the lever 65 operates the lever 49 to release the selector plate 12 to permit the selection of a totalizer.