METHOD AND APPARATUS FOR DETECTING THE PRESENCE OF AN OBJECT IN A PREDETERMINED POSITION

METHOD AND APPARATUS FOR DETECTING THE PRESENCE OF AN OBJECT IN A PREDETERMINED POSITION

A system for capacitively detecting the presence of a tape cassette within a vending machine or the like. The testing system within the machine employs an ac source connected to a source electrode and a detector connected to a detector electrode. A coded pattern is provided along the side wall of th...

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1. Verfasser: DAVID HARRY CELINE
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
CHECKING-DEVICES
COIN-FREED OR LIKE APPARATUS
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
PULSE TECHNIQUE
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creator DAVID HARRY CELINE
description A system for capacitively detecting the presence of a tape cassette within a vending machine or the like. The testing system within the machine employs an ac source connected to a source electrode and a detector connected to a detector electrode. A coded pattern is provided along the side wall of the cassette with a pair of series connected electrodes arranged to oppose the electrodes of the testing system. When aligned, the capacitances formed between the testing system electrode and the coded pattern complete an electrical circuit from the source to the detector through the cassette. The completing of the circuit indicator the presence of the cassette.
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subjects BASIC ELECTRONIC CIRCUITRY
CHECKING-DEVICES
COIN-FREED OR LIKE APPARATUS
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
PULSE TECHNIQUE
title METHOD AND APPARATUS FOR DETECTING THE PRESENCE OF AN OBJECT IN A PREDETERMINED POSITION
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