Patent GB-547147-A (GB)
Title: Improvements in and relating to cash registers or calculating machines
IPC: G06C11/02
Filed: 1939-06-21
Abstract: 547,147. Cash registers. KOOPERATIVA FORBUNDET FORENING U.P.A. June 21, 1939, No. 18078. Convention date, June 22, 1938. [Class 106 (i)] A cash register or calculating machine is provided with a number of rotatable indicators, each of which is provided with a pinion for setting the respective indicator and which indicators tend to assume zero position under spring action but are capable of being locked in set position against said spring action by means of a locking device, which when one or more of the differential settingmembers of the apparatus are being moved out of their in-operative positions, releases said pinions and indicators, and is characterized in that coupling wheels constantly meshing with the setting members are adapted, when the setting members which have been operated begin their return movement to zero position, to be moved into mesh with the pinions of all indicators, the setting members returning to normal position moving their corresponding indicators to positions corresponding to the length of movement of the various setting members, whilst the said coupling wheels retain in their zero positions those indicators whose setting members have remained in the inoperative positions. Setting members 11<SP>1</SP> .. 115, which may be semicircular or straight, are operated through finger grips 13, cam surface 14 engaging bar 50 to free pinions 7<SP>1</SP> .. 7<SP>5</SP> from the locking projections 471 .. 47<SP>5</SP> on rail 46 so that the indicator drums 1 .. 5, connected to pinions 7<SP>1</SP> .. 7<SP>5</SP> by nested shafts assume zero position determined by transversely displaceable rod 30, Fig. 3, under the action of rail 28 operated by spring 29. For a long movement of a setting member, a projection 57 on that member moves bar 56 the end portion of which moves along the cam groove 54 of lever 52 so that the cam surface 53 of lever 52 engages bar 50 to maintain pinions 7<SP>1</SP> .. 7<SP>5</SP> free after cam surface 14 has left bar 50. If the setting members have not been accurately positioned, rollers 24 on spring-pressed arms 23 cannot enter between the teeth of pinions 22 permanently in mesh with the setting members, and hook 79 prevents downward motion of rail 72 on levers 73 to prevent forward rotation of main shaft 12. When the setting members have been accurately positioned, a small reversal of crank 58, limited by lever 84 engaging recess 81 in disc 68, moves projection 69 clear of projection 78 on arm 71 which is then, with arms 73, rocked counter-clockwise by spring 76 to free the mechanism for forward rotation. At the same time, rail 72 locks arms 23 in clockwise position to prevent shifting of pinions 22 and setting members 11<SP>1</SP>.. 11<SP>5</SP>. Forward rotation of crank 58 then rotates cam disc 63 to rock plates 19 through rollers 64, 65 and bring totaliser wheels 17 into mesh with teeth 15 of the setting members. At the same time, plates 19 operate bar 37 to move spring-pressed bar 36 clear of pin 31 to release the indicator drums 1 .. 5. They also rock arms 41 to roll coupling wheels 39 into mesh with pinions 71 .. 7<SP>5</SP>. Arm 84 then leaves recess 81 and restores levers 71 and 73 to unlock levers 23 and pinions 22. As crank 58 continues to rotate, roller 62 rocks arms 55 so that bar 56, acting on projections 57, returns all the setting members to initial positions, teeth 15 rotating the totalizer wheels 17, and teeth 16 rotating coupling wheels 39 and pinions 7<SP>1</SP> .. 7<SP>5</SP> to set the indicator drums 1 .. 5, after which projections 47<SP>1</SP> . .47<SP>5</SP> again lock pinions 7<SP>1</SP> ... 7<SP>5</SP> to hold the indicator drums in set position. Finally, cam discs 63 return plates 19 to disconnect the totalizer wheels and coupling wheels.