Coin discriminator for electronic parking meter

Details Coin discriminator for electronic parking meter Coin discriminator for electronic parking meter

1988-03-25

1990-01-23

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07F 1724

Patent

active

048952389

ABSTRACT:
A coin discriminator system for use in an electronic parking meter. A deposited coin is inserted in the electronic parking meter and a chute guides the deposited coin past an inductor. The deposited coin causes a momentary change in the value of inductance of the inductor. A phase lock loop electronic circuit has an input connected to the inductor and the phase lock loop electronic circuit. The correction signal compensates for the change in the value of inductance of the inductor and has a wave shape unique to the deposited coin. A microprocessor receives the correction signal waveform for comparison to a plurality of predetermined wave shapes of a plurality of known coins to thereby identify the deposited coin. The plurality of predetermined wave shapes are stored in a memory connected to the microprocessor.

REFERENCES:
patent: 2656908 (1950-02-01), Ellison
patent: 2807016 (1938-09-01), Gloess
patent: 3166732 (1962-08-01), Ljungman et al.
patent: 3373856 (1966-05-01), Kusters et al.
patent: 3482110 (1969-12-01), Robinson
patent: 3535870 (1970-10-01), Mitchell
patent: 3541308 (1970-11-01), Ruby
patent: 3575586 (1971-04-01), Kroll
patent: 3760160 (1973-09-01), Gieringer et al.
patent: 3909826 (1975-09-01), Schildmeier et al.
patent: 3948375 (1976-04-01), Selby, Jr.
patent: 3999372 (1976-12-01), Welch et al.
patent: 4031991 (1977-06-01), Malott
patent: 4034193 (1977-07-01), Jackson
patent: 4080598 (1978-03-01), Cardone
patent: 4228519 (1980-10-01), Pfeifer
patent: 4249648 (1981-02-01), Meyer
patent: 4275272 (1981-06-01), Mennino, Jr. et al.
patent: 4310890 (1982-01-01), Trehn et al.
patent: 4356903 (1982-11-01), Lemelson et al.
patent: 4379334 (1983-04-01), Feagins, Jr. et al.
patent: 4460080 (1984-07-01), Howard
patent: 4483431 (1984-11-01), Pratt
patent: 4576273 (1986-03-01), Milnes
patent: 4754862 (1988-07-01), Rawicz-Szczerbo et al.

Affiliated with

Also associated with

Rating

Coin discriminator for electronic parking meter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coin discriminator for electronic parking meter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coin discriminator for electronic parking meter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-641280