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Dispenser monitoring system

  • US 5,505,192 A
  • Filed: 07/25/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 11/12/1993
  • Status: Expired due to Term
First Claim
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1. An electronic dispenser monitoring system for a dispenser actuatable along an actuation axis to dispense a quantity of material, comprising:

  • a housing having a lower portion for mounting on a dispenser and an upper portion having a cavity;

    said actuation axis extending from said upper portion through such a dispenser which is affixed to the lower portion of said housing; and

    an electronic dispenser monitoring circuit disposed in said cavity and including a switching device including an elastomeric membrane switch and at least one contact plate which is engaged by said membrane switch in response to actuation of such a dispenser, a counter circuit, responsive to said switching device, for registering that a quantity of material has been dispensed, and a display device, responsive to said counter circuit, for indicating the status of the material in such a dispenser;

    said upper portion further including a rigid lower member which acts as a stop for said elastomeric membrane switch, said elastomeric membrane switch actuating said switching device via said at least one contact plate in response to actuation of such a dispenser.

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