Patent GB-169750-A (GB)
Abstract: 169,750. Haddan, A. J. H., (National Cash Register Co.). May 31, 1920. Line-spacing mechanism; sheet-feeding arrangements; hammer-impression arrangements.-Upon .operation of a cash register a sales slip in duplicate placed upon a table 512, is automatically drawn into the machine and the original printed with the date, consecutive number, transaction details, and amount. The slip is then automatically shifted endwise and the impression repeated upon the duplicate, after which the first feeding mechanism again comes into action and ejects the document. The invention is set forth as embodied in a machine wherein a record-strip and voucher are also printed from the same typewheels and are marked with the character " S " when a slip is present in the machine. The cash register shown is of the kind described in Specification 8119/15, [Class 106 (i), Calculating &c.], as regards the motor-operation and the keyboard and differential mechanism. The various particulars are set up automatically and manually on type-wheels arranged on a shaft 194 and having duplicate type so that impressions may be made upon the record-strip and voucher passing above the type-wheels and also on the sales slip inserted below the type-wheels. The slip with its duplicate (see Fig. 17) is first placed on the table 512 with its lower edge and one side coinciding with lines on the table. In the first part of the rotation of the cam-shaft 166, the slip is fed into printing position by means of a knurled and doubly flatted roller 515, Fig. 6, which co-operates with a pressure roller 537, and is driven from the cam-shaft through a cam groove, toothed sector, spiral and spur gearing, and shaft 522. The impression-platen 590 is carried by arms pivoting on a rod 403 and is operated by an arm 595 pivoted on the arm 596 and connected with the platen by a link 594. The slip is felt when in position by a spring-influenced bell crank lever 609, Fig. 4, mounted on a shaft 610 and engaging a pin 612 on a bar 613 which is controlled by a cam 620 on the shaft 615. When a slip is present it obstructs the bent end of the lever 609 and thus prevents its ascent and consequently also the movement of the bar 613 and the rocking of the shaft 615. A counter clockwise movement of a shaft 254 employed for adding unity to the consecutive-number printing- wheels then results in the return of the bar 613 and other parts to normal, by reason of the engagement of an arm 608 fixed to the shaft 615, by an arm 617 on shaft 254. If, however, no slip is present, the feeler rises through the table, the bar 613 moves freely to the right, the arm 608 is removed from the path of arm 617, and a pin 626 on an arm 625 secured to shaft 615 comes above the end 627 of the toggle arm 595. Consequently, when the platen is operated, the latter arm engages the pin 626 and turns on its pivot so that the toggle is bent and the platen fails to reach the type. The successive impressions of the platen are derived from two pins on a disc on the camshaft 166 which pins engage a geneva wheel fast with a pair of cams controlling the platen arm 596. Between the two movements of the platen, the slip is gripped and fed by a knurled roller 564 carried by a bell-crank lever 561 mounted on a shaft 562 and connected bv a link 560 with an arm 554 adapted to be rocked by a face cam on shaft 166 through a bell-crank 553, a pin 559, and a coiled spring 557. When the bell-crank 561 is rocked it raises the feed-roller 564 and carries the slip into engagement with a roller 565, and an arm 577 is then rocked by a cam 582, and through a slot 576 and roller 575, and a link 571 feeds the roller 564 by means of a friction-roller pawl 570. Retrograde rotation of the feed-roller is prevented by a non-return roller pawl 583. The extent of the feed can be varied by changing the radial distance of the roller 575 in the slot 576 with respect to the shaft 393. Accenting and like arrangements.-The types for printing the " S " character referred to above occupy the zero positions on the highest amount type-wheel, and in a machine provided with zeroeliminating mechanism as described in Specification 144,544 it is necessary to prevent the eliminating action on this wheel whenever a sales slip is present in the machine. This is effected by an abutment lever 634, Fig. 13, pivoted on a shaft 501 which is rocked by a pin 632.