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Dispensing preset amounts of a product

  • US 4,254,328 A
  • Filed: 05/31/1979
  • Issued: 03/03/1981
  • Est. Priority Date: 05/31/1978
  • Status: Expired due to Term
First Claim
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1. A circuit for controlling the dispensing of a preset amount of a product from apparatus having normal and low rates of delivery and metering means for measuring the quantity of product delivered and/or calculating the monetary value thereof, comprising switching means operable to produce different switch signals for individual preset amounts of material to be dispensed in multiples of a unit amount, counting means responsive to the detection of one of said switch signals to store the number of units represented by the switch signal and operable to change the number stored by one for each unit amount dispensed, storage means for storing the difference between a predetermined amount of product, less than a unit amount, and the unit amount, and comparison means responsive to an indication by the counting means that the final unit of the preset amount is being dispensed to compare continuously the amount of product dispensed in the final unit with the stored difference to provide a signal, when the amounts are equal, to cause the dispensing to be changed from a normal to a slow delivery rate for delivery of said predetermined amount.

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