Electricity: measuring and testing – Magnetic – Displacement
Patent
1989-03-13
1990-11-13
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Displacement
324174, 32420712, 32420714, 324235, G01B 714, G01B 730, G01P 342
Patent
active
049704630
ABSTRACT:
A ferrous object sensor assembly is capable of sensing the presence or absence of an object of high magnetic permeability, such as a tooth or notch on a rotatably mounted ferrous wheel at zero speed and immediately upon power-up and, thus, may also be used as a proximity sensor. The ferrous object sensor assembly is comprised of a permanent magnet and a magnetic flux responsive sensor having a sensing plane which produces an electrical output signal which varies as a function of the change in magnetic flux density. The ferrous body sensor assembly does not rely upon pole face magnetism as some known conventional sensors but, rather, relies upon a the radial component of magnetic flux density emanating from a lateral surface of the magnet, intermediate opposing pole faces. Since the ferrous object sensor assembly does not rely on pole face magnetism, its electrical output signal is relatively stable over a relatively wide temperature range.
REFERENCES:
patent: 2942177 (1960-06-01), Neumann et al.
patent: 2987669 (1961-06-01), Kallmann
patent: 3060370 (1962-10-01), Varterasian
patent: 3613000 (1971-10-01), Weir et al.
patent: 3902144 (1975-08-01), Alich
patent: 4039936 (1977-08-01), Jones et al.
patent: 4086533 (1978-04-01), Ricouard et al.
patent: 4093917 (1978-06-01), Haeussermann
patent: 4107604 (1978-08-01), Bernier
patent: 4229696 (1980-10-01), Gustafson
patent: 4518918 (1985-05-01), Avery
patent: 4535289 (1985-08-01), Abe et al.
patent: 4731579 (1988-03-01), Petersen et al.
Moskowitz, Lester R., "Selecting Magnets for Reed Switch Actuation," Automation, Oct. 1968, pp. 66-71.
Hedeen Larry
Wolf Ronald J.
Durakool Incorporated
Strecker Gerard R.
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