Patent GB-191328662-A (GB)
Title: Improvements in or relating to Calculating Machines.
Inventor: SLOAN ROLAND HOYT
Filed: 1913-12-11
Granted: 1914-11-05
Abstract: 28,662. Sloan, R. H. Dec. 11. [Addition to 9502/13.] No Patent granted (Sealing fee not paid). Tabular calculators.-In the apparatus described in the parent Specification for computing the hours worked from the times of commencing and finishing work, summing the hours worked daily into weekly totals, and indicating the wages due at various rates of payment, (I) the part carrying the wage scale 15, Fig. 1, and the elapsed-time scales 37, 39 is hinged to the base 14, and can be supported at any angle by links 16; (2) the method of clutching the setting-pointer or pointers to a co-axial spindle is modified; (3) the elapsed-time and wages indicator, adapted to sum weekly totals of hours worked and wages earned, and the elapsed time indicator for computing the period worked each day are separately mounted on carriages and driven independently at different speeds from the pointer which is set to the hours of starting and finishing work respectively; (4) clutches are provided connecting the two indicators to the shaft actuated by the pointer, and (5) means are provided for automatically returning the indicators to normal position after the elapsed time and wages for a given period or the day's working period have been computed. The pointers 24, 25, Fig. 2, are fixed together, and either the former is set to the hour of commencing work as shown on the outer scale 22, or, in the case of overtime, the latter is set to the inner scale 23, each division of which is of double value. These settings are effected by means of the handle 126, Fig. 4, in its undepressed position. (2) The handle is then depressed so as to clutch the pointers 24, 25 to the spindle 30, and the pointers moved so that one of them points to the hour of finishing work on the appropriate normal or overtime scales, the allowance of the half-hour for luncheon being made, as before, between 12 and 1 p.m. on the former scale. The depression of the handle 126 lowers a spring-controlled sleeve 128 carrying a clutch-arm 32 so as to cause the arm to engage the corrugated disk 31. (3) The movement of the spindle 30 is communicated to a shaft 64 through a pair of bevel-wheels 67, 66, Fig. 2. The shaft carries a pair of disk-clutches 76, 83, described below, adapted to transmit motion to the pulleys 58, 84 which co-operate with pulleys 89, 85, respectively, in supporting endless travelling bands 57, 86. Gearing 68, 69, 73, 74 is arranged on the shaft 64 so as to cause the pulley 58 and band 57 to move four times as fast as the shaft and the pulley 84 and band 86. The band 57 controls the elapsed-time indicator 43 which co-operates with a time scale 39; the band 86 drives the transverse elapsed-time and wages indicator 40, having a scale 41 of wagerates per hour in cents, and a quarter-hour scale beneath. The scale 39 indicates the period worked in any day and shows ten-minute intervals, the linear value of a unit on this scale being four times that of a unit on the scale 37, Fig. 1, which indicates the weekly totals of hours worked; the scale 41 on the indicator 40 cooperates as before with the columns 38 of the wages-table 15 so as to enable the wages for the computed period to be read. The indicators 43, 40 are mounted on carriages guided by rollers. (4) The clutches 76, 83 comprise groups of disks normally forced into engagement with each other by meansof springs. By the depression of the key 104 the two clutch collars are moved against the pressure of their springs through overlying levers 103, 107, and the disk simultaneously disengaged; or the disks of the clutch 76 can be separately disengaged and maintained, if desired, in this position, by the actuation of the key 108, which can be locked by a pin and bayonet-slot. (5) As soon as either or both. of the clutches 76, 83 are so disengaged, the corresponding travelling band 57, 86 together with the indicators 43, 40, are respectively returned to zero by springs 94, 99, which were wound up when the indicators were moved to show the elapsed times and wages. Thus, as soon as a computation is finished, the depression of the key 104 causes both indicators to return to zero: for the computation of each day's work the indicator 43 can be separately zeroized, or may be kept inactive by the temporary or permanent-depression of the key 108.