Fluid dispensing apparatus preselector system

Claim 1

In a fluid dispensing system having fluid delivery means, manually operable means for selectively activating and deactivating the fluid delivery means for dispensing fluid, fluid valve means operable for being closed for terminating the delivery of fluid, a money preselector mechanism for money preselection of the monetary amount of fluid to be dispensed by the deposit of money therein, and control means operable by the money preselector mechanism and connected for closing the valve means for terminating a fluid delivery after a monetary amount of fluid delivery corresponding to the value of money deposited in the money preselector mechanism is dispensed; the improvement wherein the control means comprises a bidirectional binary electronic counter connected to the money preselector mechanism for being preset by being electronically indexed in a first counting direction in accordance with the value of money deposited in the money preselector mechanism, pulse generator means connected for electronically indexing the electronic counter in the opposite counting direction during the delivery of fluid and in accordance with the monetary amount of fluid dispensed, binary electronic counter readout means for closing the valve means for terminating the delivery of fluid when the binary electronic counter reaches a predetermined electronic count; the binary electronic counter being connected to be reset to said predetermined electronic count when the fluid delivery means is deactivated by the manually operable means, and hold means connected to be operated by the binary electronic counter readout means to maintain the counter at said predetermined electronic count when it reaches said predetermined electronic count and until money is thereafter deposited in the money preselector mechanism.