Patent GB-190623659-A (GB)
Title: Improvements in and connected with Calculating Machines.
Inventor: TRINKS FRANZ
Filed: 1906-10-24
Granted: 1907-03-21
Abstract: 23,659. Trinks, F. Oct. 24. Calculating - apparatus. - Relates to devices for coupling the adjusting-lever and camdisk in calculating-machines of the pinwheel and cam-disk type,and consistsin providing means for coupling the levers and cam-disks for both directions of rotation and for uncoupling them before the crank operation. As shown in Fig. 1, an elbow-lever 5 is pivoted at 4 to the adjusting-lever 2, the coupling taking place by the engagement of a recess 6 in the lever 5 or cam-disk 8 with a projection 7 on the other member. A spring normally keeps the members uncoupled, or a spring - pressed pin, operated by the finger mounted in the lever 2, may engage with a recess in the cam-disk. As shown in Fig. 4, a fixed plate 11 partly surrounding the lever 2 has notches 12 corresponding to the settings of the operating- wheel. A spring-pressed pin 13 attached to the lever 2 engages with the notches and locks the lever 2, leaving the members normally uncoupled. When the lever 2 is turned, it is automatically coupled to the cam-disk by the pin 13 being pressed in by the notch, thus causing the projection 15 on the pin to enter the notch 16 in the cam-disk. As shown in Figs. 5 and 6, the lever 2 and cam-disk are similarly toothed, the wheel 21 mounted on the shaft 20 serving to couple them. The shaft 20 can be moved axially by the lever 22 and spring-controlled bar 23 projecting through the casing. The spring-pressed pin 25 in the crank-handle presses on the bar 23, thus normally coupling the lever and cam-disk. On commencing to turn the crank, the bar 23 is released and the members are uncoupled. The lever 2 is then locked either by a projection on the shaft 20 or by a pawl 28. The numerals on the curved flange 18 of the lever 2 can be seen through windows 19 and show the setting of the operating-wheels. As shown in Fig. 11, the lever 2 and cam-disk 8 are normally coupled by the engagement of a projection 30 on a ring 31 mounted on the shaft 1 with a notch in the members. The members can be uncoupled by sliding bars 33 in grooves in the shaft 1, pins 32 in these bars engaging with annular spaces in the ring 31. To uncouple the members, the shaft 38 is rocked by an external hand-lever 40, which causes an arm 39 to rock the lever 41, 35 attached to the collar 34 on the bars 33. The shaft 38 is returned by a spring, but cannot be returned before a complete operation of the crank, because the pin 44 carried by an arm 45 on the shaft engages the periphery of the disk 42. On a complete rotation of the crank, the pin 44 drops into a notch in the disk 42. This arrangement also prevents the crank from being operated until the lever 2 and cam-disk are uncoupled. The arrangement shown in Fig. 14 is similar to that shown in Fig. 4, except that the members are normally coupled by the pin 13. In this case, a lever 40, as in Fig. 11, is rocked, and causes a plate 49 to press the pin out of the notch in the cam-disk and into a notch in the plate 11, thus locking the adjusting-lever. As shown in Fig. 17, the lever 2 and cam-disk 8 are coupled by means of lateral teeth. They are uncoupled on turning the crank by means of a pin 51 and annular fixed cam 53 which give the shaft and disk an axial movement. This axial displacement is made use of in the arrangement shown in Fig. 18, the coupling being, made by the engagement of a projection 56 on the sliding pointer 2 with a notch 55 in the cam-disk.