Patent GB-191414052-A (GB)
Title: Improvements in Adding Machines.
Inventor: HADDAN REGINALD
Filed: 1914-06-10
Granted: 1915-06-10
Abstract: 14,052. Haddan, R., [National Cash Register Co.]. June 10. Adding machines with several totalizers and with printing mechanism.-A multiple-bank key-set motor-operated machine with differential mechanism of the type described in Specification 6428/09 has a number of totalizers selectively operated by intermediate actuators. These actuators comprise b r o a d pinions which are axially movable, and the corresponding denominations of the totalizers are arranged side by side and are selectively engaged by pinions secured to the broad pinions. Record-strips are moved in phase with the selected totalizers, and the machine is motor-driven through a one-revolution clutch. The differential segments 9, Fig. 7, are released by a cam-operated bar 25 a n d a r e moved by springs 35 until arrested by key-set stops mounted in a frame 7. The segments 9 carry toothed s e c t o r s 44 engaging broad pinions 43, Figs. 7, 8, 11, of the intermediate actuator, connected to pinions 60 which engage the totalizer pinions 45. The pinions 45 are swung out of gear by cams during setting of the segments 9 and are brought into gear while the segments are locked by cam-operated bars 37 and are then rotated as the segments are brought back to initial position by the bar 25. The selectormechanism for governing the three totalizers comprises a setting- handle 16, Fig. 2, capable of being locked in three positions, of which the centre is normal. In the other positions it moves bowls, for communicating motion to a lever 80, into action with a power-operated cam 90; from this lever motion is communicated to a rod 104 connected to a bell-crank lever 105, Fig. 8, which causes axial motion of a shaft 48<a> which carries the intermediate actuators 43. A spring- pressed pin 231 carried by a frame 48<b> fixes the exact position of the shaft 48<a>. To move the frame 137, Fig. 1, which carries four record-strips (one corresponding to each totalizer, and one, 144, for independent records) in phase with the intermediate actuator, a toothed sector 101, Fig. 2, by which the rod 104 is carried, transmits motion to a pinion 133 on a shaft 134; this shaft has a quick-pitch screw 135, Fig. 1, engaging a nut 136 upon the record frame 137. When using the strip 144, the shaft 134 is put out of gear and the frame is operated by hand. The record device is in other respects that described in the above-mentioned Specification. Operating by motors. -The driving-mechanism is put into operation by a finger-bar 27, and consists of an electro-motor which drives through a worm-wheel 187 and is provided with a one-revolution clutch. The motor details are as described in Specifications 608/06 and 17,534/08. Printing totals and sub-totals.-Keys 202, 201, Fig. 4, for printing totals and sub-totals respectively are provided in a frame 203 pivoted about a point 204. Depression of the sub-total key 201 causes the cam slot 205 to operate through an arm 208 a rod 214 which rocks a member 54, connected to the totalizer-disengaging means, out of action with its operating-cam; the movement of the frame also operates a bell-crank lever 219 which releases the zero plungers and locks the amount keys. Rotation of the driving-shafts allows the engaged totalizer to discharge its total into the printing-type carriers; on the return motion, the parts are reset to their original positions. By depressing the total key 202, the cam-slot 206 comes into operation and the member 54 is rocked to such a position that the totalizer is disengaged after it has been zeroized. Transfer mechanism. - Each broad gear 43 carries a pin 61, Fig. 11, which is normally engaged by a pawl 62 on its return movement to zero position. The pawl is tripped by a pin 63 upon the gear 45 of lower denomination and thus allows the gear 43 to move through an additional tooth space under the action of a spring 66 and slotted connexion. To hold the pawls in release position until the end of the operation catch-members 67 are provided and are reset by cams 29. In a modified construction, the wheels 60, 43 are mounted independently on their shafts with springs between them to give the additional rotation, the pins 61 being, carried by the wheels 60.