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Data acquisition unit

  • US 4,350,238 A
  • Filed: 04/04/1980
  • Issued: 09/21/1982
  • Est. Priority Date: 04/04/1980
  • Status: Expired due to Term
First Claim
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1. A data acquisition unit, which is connectable to a money-operated, multi-selection vending machine that responds to the insertion of money to develop credits and that responds to the actuation of selection switches to initiate vending operations, and which comprises a memory having locations in which resettable data can be stored, a connection between said vending machine and said data acquisition unit which enables said vending machine to transmit data to said data acquisition unit, a switch, a data processing means, and a data-receiving device which is connectable to said data acquisition unit to receive data from said acquisition unit, said data processing means normally responding to data transmitted by said vending machine to store said data in said locations in said memory, said data processing means responding to actuation of said switch to place said data acquisition unit in a data-yielding mode wherein said data processing means transfers said data from said data acquisition unit to said data-receiving device, said data processing means acting while said data acquisition unit is in said data-yielding mode to yield said resettable data to said data-receiving device while also retaining said resettable data in said locations in said memory, said data processing means subsequently responding to restoration of said switch to its normal condition and to the transmission of further data from said vending machine to be enabled to clear said resettable data from said locations in said memory.

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