Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1977-01-21
1978-08-15
Krawczewicz, Stanley T.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
324200, G01P 348
Patent
active
041076010
ABSTRACT:
An exciter for use with a shaft speed magnetic pickup includes a strip of flexible, stretchable, sheet material having a plurality of magnetic elements attached to it that are uniformly spaced along the strip, enabling the magnetic elements to be attached to the exterior of various diameter rotatable shafts by stretching and fastening the strip about the circumference of the shaft close to the magnetic pickup which generates an electrical pulse signal whenever a magnetic element passes by it. The pulse signal is processed to produce a readout of shaft speed. Two magnetic pickups circumferentially spaced about the shaft closer than the circumferential spacing of the magnetic elements are used to provide signals that can be processed to indicate shaft direction of rotation as well as shaft speed.
REFERENCES:
patent: 3243692 (1966-03-01), Heissmeier et al.
patent: 3560845 (1971-02-01), Goldberg et al.
patent: 3641535 (1972-02-01), Knopf
patent: 3651500 (1972-03-01), Weir
patent: 3783248 (1974-01-01), Sugden, Jr.
patent: 3986118 (1976-10-01), Madigan
Barmeier, Jr. Harold J.
Wright David A.
Krawczewicz Stanley T.
National Marine Service, Inc.
Sunderdick Vincent J.
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