Patent GB-190705206-A (GB)
Title: Calculating Attachments for Typewriting Machines.
Filed: 1907-03-04
Granted: 1908-01-23
Abstract: 5206. Smith, J. A., and Elliott-Fisher Co. March 4. Typewriters and like machines.-The totalizing- counter of the adding-attachment for a typewriter described in Specification No. 18,341, A.D. 1905, is modified to enable it to register English monetary values ; for this purpose improvements are introduced in: (1) the arrangement of numeral wheels and means for actuating them ; (2) the transfer mechanism and (3) the zeroizing-mechanism with the associated controlling-devices therefor. (1) The master setting-wheel 4<a> gears in turn with each of the receiving-wheels a ... j, Fig. 1, which are uniform as to pitch and number of teeth, and gear with their respective numeral wheels a<1> ... j<1>, of which the six pound-wheels and two shillingswheels upon the left have each ten teeth and revolve at the same rate as their receiving-wheels, whereas the two pence and farthings wheels upon the right are twelve-toothed wheels of equal pitch and therefore do not complete a turn for one revolution of their receiving-wheels; the receiving- wheels are upon a common shaft 3, Figs. 8 and 10, while the numeral wheels are upon two shafts 5 and 6 each vertically above the lower shaft but at different distances the efrom to allow for the greater diameter of the pence and farthings wheels. The numeral keyboard contains keys from 1 to 11 and additional spacing-trips x, y, z are added for regulating the spaces according to the arrangement of the counter. (2) Transfer is arranged to take place three times per revolution in the case of the farthings-wheel and five times in the case of the tens-of-shillings wheel, and the transfer teeth are placed upon the numeral wheels but for other denominations upon the receiving-wheels. The mechanism is of the independently restored type described in the prior Specification, wherein the transfer tooth forces backwards a projection 19 upon a pivoted spring-controlled locking-dog 17 'and the transfer lever 10 then moves downwards so as to actuate the higher wheel by means of a pawl 16 previouely positively put into engagement, and prevent its overthrow by contact of the upper arm 14<a>, both the locking dogs and levers being subsequently restored by a yoke 30 which is rocked when the carriage on its return movement presses in the rack 34. The different position of the transfer teeth of the pence and farthings denominations necessitates the form of locking-dog shown in Fig. 8. (3) Zeroizing is effected by rotating each of the spindles 3, 6 through a little more than a revolution, for which purpose a handle and sector 49, 47 are provided, the two spindles are intergeared, and the eight receiving- wheels on the left together with the pence and farthings numeral wheels have spring pawis, whereby cams fast upon the rotated spindles carry them round in the normal diretion. A cam projection 53<a> upon the handle co-operates with a two-armed lever 51, having a pin 54 thereon, and a plate 55 which slides upwards directly the handle moves and brings a stop into the path of the pin in order that the transfer-lever restoring- yoke 30 may at the first movement of the handle be given a complete stroke to restore all the transfer parts, may afterwards be slightly retracted to permit movement of the transfer locking dogs during zeroizing but prevent fall of the transfer levers, and may finally restore all the transfer parts during the return stroke of the zeroizing-handle.