H. R. Electronics Company

Harlan R Giacomo

The combination of a vend control circuit with a device to accumulate an ongoing history of the operation of a vending machine capable of vending products and making change, the improvements comprising circuit elements for detecting the occurence of an interruption in the supply of power from a power source to the circuit and operable to prevent loss of stored information on the ongoing machine operations before resetting the circuit, an internal source of energy rechargeable by the power source, a pricing matrix and associated switches the combined settings of which establish the vend price for the machine, and a sensor device responsive whether or not the door to the vending the machine is open for restocking or servicing including a control circuit associated with the door sensor device for distinguishing between vends made by the vending machine when the door is open and vends made by the machine when the door is closed.

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St. Louis County, MO, United States of America

Harlan R Giacomo