Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1982-03-19
1984-07-24
Krawczewicz, Stanley T.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
310168, 324160, G01P 348, H02K 1742
Patent
active
044619944
ABSTRACT:
The tachometer of the present invention has a stator member with a pair of opposed stator elements. The stator member is mounted on the apparatus. Windings are provided on the stator elements in which the electric signal is generated.
A magnetic means is provided for establishing a magnetic flux between the stator segments. For this purpose, magnets may be mounted on the exterior of the stator segments and the portions of the apparatus adjacent the segments used as the flux return path. Or, magnets may bridge the two stator segments.
A magnetically permeable rotor is mounted on the apparatus shaft. The rotor may be formed of steel laminations with no rotating winding and has a plurality of peripheral projections that alter the reluctance of the magnetic path in the teeth as they rotate, inducing a speed responsive signal in the windings. The maximum speed of the rotor is limited only by the strength of the steel.
REFERENCES:
patent: 2814745 (1957-11-01), Sinclair
patent: 3408556 (1968-10-01), Gabor
patent: 3619678 (1971-11-01), Ruof
patent: 3980913 (1976-09-01), Peterson
patent: 4424463 (1984-01-01), Musil
patent: 4425522 (1984-01-01), Miyasaka
Goretzki: "Slotted Probe to Achieve Multiple Cycles per Emitter Tooth"-IBM Bulletin-Feb. 71-p. 2579.
General Electric Type AN Generators-Specifications Sheets for Models AN100A, AN102D and AN102B, Nov. 1978.
Haurykiewicz John M.
Krawczewicz Stanley T.
Litton Industrial Products Inc.
Seldon Robert A.
Solis Jose M.
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