Patent GB-191311823-A (GB)
Title: Improvements in and relating to Adding and Listing Machines.
IPC: G06C7/06
Filed: 1912-12-05
Granted: 1914-03-05
Abstract: 11,823. Marks, E. C. R., [United States Cashier Co.]. Dec. 5, 1912. Adding - apparatus.- Multiple-bank adding- machines of the key-set independently-operated type are provided with means for locking the keyboard on the depression of the total and sub-total keys, latching and releasing the total and sub-total keys and other depressed keys, and controlling the engagement and disengagement of the accumulating-wheels and racks, such means comprising a three - armed lever having cam - surfaces. An error key and a repeat key are also provided. Keyboards &c. - The depression of a key 29, Fig. 3, thrusts forward into the path of a projection 80<1> on one of a number of vertical adding-racks 80, one of a denominational series of stop-rods 90, which is at once latched by its corresponding pivoted locking-plate 98, Fig. 8, the stop-rod maintaining the key in its depressed position. The key also slides rearwards a locking-rod 88 out of engagement with the projection 80<1>, thereby releasing the rack. On the forward movement of the operating- lever, connected to the shaft 39, a bail 73 is raised, thus allowing levers 75 to rock, and the racks to descend until they strike their respective stop-rods 90. The adding-wheels 84 are thrown into engagement with the racks 80, as usual, during their ensuing upward stroke due to the return movement of the handle as described below, and the item is thereby accumulated in the usual manner. Printing totals and sub - totals. - When the total and sub-total keys 110, 111, Fig. 9, are actuated, a bar 115 is moved rearwards rocking an arm 117<1>, Fig. 3, and carrying all the locking- rods 88 to the rear by means of a bail 117. This special rearward movement of the rods 88 not only causes them to disengage the racks 80, but is sufficient to bring the plain parts 88<a> beneath the pins 89 on the key-stems, thereby locking them against depression. The total and sub-total keys 110, 111 when depressed are latched by a bail 104, the movement of which to latch the keys moves the releasing-bar 101, thereby rocking all the pivoted locking- plates 98 and releasing the stop-rods 90 and the depressed keys. At the end of every operation an arm 72' is rocked so as to release a spring-controlled pivoted arm 106 carrying a pawl 108<1>; the pawl engages a stud on the frame of the bail 104 and effects the releasing- movement of the bar 101. The setting-keys, or the total and sub-total keys, if depressed, are thus released. Differential mechanism.-Controlling engagement &c. of accumulating-wheels and racks. The actuation of the main shaft 39, Fig. 3, is transmitted through a flexible connexion 78, Fig. 7, to a lever 79 and arm 71. The lower end of the arm co-operates with a cam-slot 69<1>, on the arm 69, so shaped that the bail 74 is not raised from the levers 75, and consequently movements of the adding-racks 80 and printing- members 95 are not permitted, while the pinions of the accumulating-wheels are engaging with, or disengaging from, the racks. The accumulating-wheels are carried in a frame 121 mounted on the shaft 122 which is rocked through connexions 136, 137 from a three-armed lever 138. In the normal operation of the machine, the lever 79 moves rearward, the pawl 143 thereon engaging the right-hand cam-surface 139, Fig. 7, and rocking the lever 138 and frame 121 in a clockwise direction. The accumulating-wheels and racks are thus engaged at the end of the forward stroke of the operating-lever, and remain in engagement till the pawl at the end of its return stroke strikes the left-hand camsurface 139. If the total key 110 is depressed, levers 149, 153 are rocked, and cam-parts 138<1>, 138<11> are removed from the path of the pawl 143, which is thus free to turn under the action of its spring and to engage both the pins 142 on the lever 138 in turn. The accumulating- wheels are thus engaged with the racks on the forward stroke of the handle, and disengaged on the rearward stroke. If the sub-total key 111 is actuated, the lever 153 only is rocked; consequently the pawl 143 is free to engage with the pin 142 on the left-hand arm only of the lever 138. The accumulating-wheels are thus rocked into engagement with the racks at the beginning of the forward stroke of the operating-lever and remain in engagement therewith until the end of the return stroke. Error keys.-Actuation of a key 102, Figs. 9 and 11, rocks the bail 104, and moves the releasing-bar 101 as described above. Multiplying by repetition. - Depression of a key 118, Figs. 9 and 10, prevents the arm 106 and pawl 108<1> from moving; the bail 104 and releasing-bar 101 are therefore not moved as usual at the end of the operation. The machine may be employed in connexion with the moneyhandling machine described in Specification 28,084/12.