Microprocessor-controlled apparatus adaptable to...

Details Microprocessor-controlled apparatus adaptable to... Microprocessor-controlled apparatus adaptable to...

H - Electricity

04

M

379/74, 342/11.3

H04M 17/02 (2006.01) G07D 5/00 (2006.01) G07D 5/08 (2006.01)

Patent

CA 2011560

Abstract of the Disclosure A microprocessor-controlled electronic coin chute is designed for use in a coin telephone station and adapted to operate over an extended temperature range while making coin acceptance/rejection decisions that are both rapid and accurate. Within the coin chute are a pair of coin quality sensors designed to measure a different property of a coin such as composition and size. Each coin quality sensor comprises a series-connected pair of coils placed on opposite sides of the coin path. These coils are part of an oscillator circuit having a maximum frequency when the coin is positioned between them, and an idle frequency otherwise. Idle frequencymeasurements are made each time an associated telephone switchhook is operated. The measured idle frequency serves as a temperature indication which, together with a stored program, is used by the microprocessor to establish acceptability limits for each coin in an allowed set. The stored program includes a predetermined functional relationship between acceptability limits and idle frequency for each allowable coin. New acceptability limits are calculated immediately after the idle frequencies are measured. -17-

Affiliated with

Also associated with

Rating

Microprocessor-controlled apparatus adaptable to... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microprocessor-controlled apparatus adaptable to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microprocessor-controlled apparatus adaptable to... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1429977