Patent GB-190514115-A (GB)
Title: Improvements in and relating to Adding Machines.
Inventor: WALES CHARLES
Filed: 1905-07-08
Granted: 1906-07-07
Abstract: 14,115. Wales, C. July 8. Calculating-apparatus.-In key-set lever-operated multiple - bank adding - machines with printing- attachments, the keys set stops which determine the extent to which disengaged racks move forward on the forward stroke of the handle ; the counter wheels are then lowered until their pinions gear with the racks, whereby the counter is actuated upon the return of the racks. Link-work arrangements communicate motion from the main-shaft to the rack-bar and printing parts, detents are provided upon the stop rods to prevent depression of more than one key in each bank and hold the stops until released from the shaft, the printing types are on bars, and the spring hammers have an individual and a general release, a cylindrical platen being employed. Total-printing and zeroizing are effected by putting the rack-bars into gear with the counter during their forward stroke. Fig. 16 shows the machine in longitudinal section. The stop-rods 19 pass upwards through slots in adjustable plates 20 and guide-pins running across them, and raise weighted, restoring, rack-retaining members 23 of which there is one for each denomination, the rack-bars 22 being thus free to move forward upon their supporting links when the link-work 40, 39, 37 operated from the main shaft 41 swings their returning-arms 35 forwards. Just before the return begins, link-work containing a slot and pin withdraws the counter-spindle supporting-arms 48, Fig. 34, from their latches 49, whereupon the counter-pinions fall into gear with the racks, but are lifted again after registration by a cross-bar 100 camming upwards the arms 51. Fig. 8 shows the mechanism for locking depressed keys, unlocking them after the racks have begun their rearward motion, and ensuring that only one key in each bank shall remain depressed. Projections 148 upon the stop-rods co-operate with hinged spring-plates 64 which snap underneath a raised projection, but are pressed away from the rods either by the depression of a second key or by the motion of a transverse bar 144 with gaps 150 which engage the edges of all plates at a time determined by the main shaft link-work; the hand-lever is itself provided with a detent in the form of a spring pawl adapted to take into locking recesses m a fixed sector. The printing types are on vertical bars, and are forced against the cylindrical platens upon the forward stroke, inking and paper-feeding taking place on the return. Rearward arms 69 on the rack-bar supporting-links have adjustable extremities 70 for raising type-bars 74 by means of links 73, upward motion of the corresponding bars 104 also taking place to release triggers 109, Fig. 23, and unlock the hammers 80, which are pivoted on the spindle 91. Link-work from the main shaft rotates the disk 98 at the required moment, lifts the general hammer-lock 81, and allows all the hammers previously released to be urged against the bars by their springs, play being allowed to ensure freedom at impact. A similar disk and associated link-work are employed to operate the hinged hammer-restoring shutter 113. For the purpose of printing zeroes to the right of significant figures, the triggers 109 have pins 121 projecting under the next higher trigger and adapted to be depressed thereby, the upwardmoving springs of the bars 104 being of gradually increasing strength to allow for this. To print totals, and also to zeroize the totalizing-counter, a special handle 53, Fig. 36, is operated, whereby the rack-retaining members 23 are lifted, the counter pinions are dropped into gear with their racks during their forward stroke by the parts 61, 62, 63, Fig. 34, and come to rest when the transfer teeth on the wheels lock against the transfer triggers, and the cylindrical platen is lifted slightly so as to raise the printing-point and prevent risk of overthrow, the type-bars being set by the arms on the rack-bar supporting-links as before. Reverse motion of the total handle keeps the rackbars and pinions out of engagement during the return of the operating-lever.