Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1985-05-06
1989-09-26
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324251, 324252, 324207, 194317, 194318, G01N 2772, G01R 3312, G07F 302
Patent
active
048703605
ABSTRACT:
When an electrically conducting material is subjected to an alternating magnetic field local changes in the magnetic field adjacent to the conducting material are detected by a detector comprising a magnetoresistor or Hall crystal which generate an electrical signal when subjected to the magnetic field.
The process and apparatus can be used to identify, classify and locate electrically conductive material.
The detectors can be of the order of a few millimeters in size and so can be used to detect local changes in the magnetic field over correspondingly small areas of the material.
The invention is particularly useful in identifying coins used in coin operated machines.
REFERENCES:
patent: 2987669 (1961-06-01), Kallmann
patent: 3373856 (1968-03-01), Kusters et al.
patent: 3449664 (1969-06-01), Smith
patent: 3450986 (1969-06-01), Chapman et al.
patent: 3498437 (1970-03-01), Ukon et al.
patent: 3599771 (1971-08-01), Hinterstocker
patent: 3738469 (1973-06-01), Prumm
patent: 3749220 (1973-07-01), Tabiichi et al.
patent: 3869663 (1975-03-01), Tschierse
patent: 3901367 (1975-08-01), Miyazawa
patent: 3933232 (1976-01-01), Searle et al.
patent: 3956692 (1976-05-01), Weinberg
patent: 3977508 (1976-08-01), Baumberger
patent: 4066962 (1978-01-01), Jaffe
patent: 4086527 (1978-04-01), Cadot
patent: 4119911 (1978-10-01), Johnson, Jr.
patent: 4190799 (1980-02-01), Miller et al.
patent: 4257435 (1981-03-01), Tanaka et al.
patent: 4364011 (1982-12-01), Bloomfield et al.
patent: 4469213 (1984-09-01), Nicholson et al.
patent: 4572349 (1986-02-01), Furuya et al.
Collins Alan J.
Husni Mazen R.
Edmonds W.
Eisenzopf Reinhard J.
University College Cardiff Consulatants Limited
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