Patent GB-712406-A (GB)
Abstract: 712,406. Cash registers. TURNER, E. H. Aug. 20, 1952 [May 21, 1951], No. 11830/51. Class 106 (1) In a cash register, Fig. 2, in which each setting wheel 1 is rotatable in one direction only and meshes with means 1a for registering the revolutions thereof and a resettable drum 10 for indicating the position to which the wheel 1 is set at each operation, the setting operation of each wheel 1 is effected by a radial arm 4 rotatably mounted concentric with each wheel 1. The arm 4 comprises two parts 4' and 4", interconnected by a pin and slot arrangement normally maintained in extended relationship by a spring 5. The arm 4 may be shortened by moving the part 4" radially inwards until a pawl 6 on the part 4" engages a notch in the part 4'. The part 4" has a projection 4a which, when the arm 4 is shortened, engages the setting wheel 1 for turning it. Drum indicators.-The indicating drums 10 are associated one with each of a corresponding number, of wheels 7 through pawls 11 acted on by springs 10a. The wheels 7 are freely mounted on the shaft 8. The drums 10 follow. in one direction only, the movements of their respective wheels 7 but are prevented from exceeding such movement by the pawls 11. Resetting indicator.-A yoke 12, rotatable on the shaft 2, lies across the levers 4 and is raised by them during their upward movements. The yoke 12, during its upward movement, is coupled to the shaft 8 by a quadrant 13, Fig. 4, freely mounted on the shaft 2 and meshing with a toothed wheel 14' keyed to the shaft 8. Rotation of the shaft 8 causes radial arms 14 secured thereto to contact projections inside the drums 10 to turn the drums back to their zero position. The pawls 11 over-ride the teeth of the wheels 7 during this resetting operation. As shown in Fig. 4, on raising the yoke 12 a pawl 15' engages a shoulder on the quadrant 13 to turn the quadrant until the pawl I5<SP>1</SP> is lifted by a fixed cam 16, whereupon the quadrant 13 returns to its initial position by gravity or by a spring 13a that is stronger than the springs 10a. The pawls 11 hold the wheels 7 stationary during this downward movement of the quadrant 13. Springs 17 cause the yoke 12 to follow downward movement of the arms 4 during an item entering cycle. In an alternative method of resetting the indicator drums to zero, the drums 10 are normally connected to their associated pinion by a toothed clutch, or by a projection adapted to engage between the teeth of the pinion. To reset the drums, the two parts mentioned are disengaged by being shi ted apart along the shaft, when the drums return to zero position under spring pressure. Cash drawer mechanism.-When the yoke 12 is moved to its lowermost position, it causes a link 15 to lift a bolt 18 from a cash drawer 19 which is then ejected by a spring. A bell 20 may also be struck. Flashes.-Flashes 21 mask the drums 10 whenever the yoke 12 is away from its lowermost position. Transfer mechanism.-The yoke 12 may be used during its upward movement to lift the wheels la out of mesh with the wheels 1 and then to operate a tens carrying mechanism in a known manner. Full stroke device.-A full stroke device is provided to ensure complete resetting of the indicating drums 10 and comprises a gravity pawl 28 on the yoke 12 engageable with a fixed toothed centre 29 as shown in Fig. 4. Operation.-If only one denomination is to be set, the relevant arm 4 is lifted to its top position and then returned to the required position against a scale on the casing 3. The arm 4 is then pressed in (and held in its compressed position by the pawl 6 to engage the wheel 1) and the arm is then pulled down to its lowest possible position. If more than one denomination is to be set, one or more arms 4 are lifted to the desired registering positions on the scale on the casing 3 and pressed in, in a radial direction. This operation is repeated for other setting arms as necessary, the last arm being lifted to its uppermost position before being lowered to its setting position in order to clear the full stroke mechanism. On completion of these operations said arms are urged downward to their lowermost positions by the yoke 12 by the spring 17. The yoke 12 does not exert a downward thrust earlier owing to its being restrained by the full stroke mechanism.