Patent GB-1419456-A (GB)
Title: Coin rejector mechanism
Filed: 1973-07-24
Abstract: 1419456 Coin-rejector mechanism COIN CONTROLS Ltd 14 Feb 1974 [24 July 1973] 35242/73 Heading G4V A false-coin rejector mechanism comprises a first over-balancing cradle 14 arranged to support a coin of more than a first predetermined diameter, but to allow coins of less than said first predetermined diameter to drop into a second over-balancing cradle (not shown) arranged to support any coin of more than a second predetermined diameter, each cradle being arranged, when a coin supported thereby exceeds a respective predetermined weight, to tilt so that the coin tends to fall from the cradle and in so doing engages a respective sizing lever 15 arranged for limited movement such that coins of more than a predetermined diameter are retained in the cradle, but a coin of correct diameter is allowed to move along a path in which it passes through the field of an adjustably positioned permament magnet 23 producing on the coin a retarding effect dependent upon the resistance to eddy currents offered by the coin, the coin then following a path divided by a separator member so positioned that true coins pass on one side thereof into a coin receiver and false coins pass on the other side thereof into a rejection shoot. The mechanism has a steel plate chassis 11. A sub-chassis plate 13 carries the first cradle member 14 which is pivoted at 13b and has projections 14b, 14c that engage in arcuate slots 13c, 13d permitting clockwise movement thereof. Second pivot 13c carries weighted lever 15 on which portion 15a biases the lever anti-clockwise until projection 15b engages an end of slot 13f. If a coin is of the correct, or heavier weight, member 14 tips the coin on to projection 15b. If a coin is too large it is prevented from falling from the cradle. The positioning of lever 15 is adjustable. Pin 18 engages lugs lla and 11b and has chassis 13 and sub-chassis 19 mounted thereon via lugs 13g and 19a respectively. Spring 20 biases the chassis and sub-chassis towards plate 11. A permanent magnet 23 is mounted in housing 19c and is rotatable therein. Lug 19e engages portion 14c of cradle member 14 when the cradle is overbalanced. When the cradle accepts a coin it overbalances clockwise and deposits the coin to the right unless it is oversized. On leaving the cradle it is led past magnet 23. If the coin is false it will fall to the right of pin 11d, land on a curved portion 24a of a plate-like member 24. The coin then slides on to ramp 24b. Plate 25 forms a shoot with member 24 and has a bulged portion 25a as a discharge shoot. True coins rebound from nylon member 26, pass to the left of pin 11d and enter curved channel 24d to leave the assembly at its right hand side. An oversize coin trapped in the cradle by lever 15 is released by displacement of chassis 13 from chassis 11. The coin is guided by curved surface 24c to the discharge channel. An undersize coin drops between the lugs 14e, 14c and falls on rearwardly inclined portion 13k and passes through aperture 11g into a second coin-rejector system. The arrangement and operation of this second system is essentially the same as described above. An oversize coin arrested anywhere in the mechanism is released by operation of a clearing mechanism actuated by depression of a lever 40 pivoted on pin 11k on the chassis 11. The lever has a nylon roller 40c which when the lever is depressed engages lug 13m on chassis 13 to move it away from chassis 11. Clearing lever 22 is also pivoted. This lever is linked to clearing lever (43) (Fig. 4, not shown) by pin 22a and link (42). Rotation of lever (43) causes roller (43b) to engage lug (30f) on chassis (30) and pivot it away from chassis 11. Also the clearing lever sweeps the intervening space to deliver any jammed coins to the reject shoot.