Tachometric device driven by an electric motor

Details Tachometric device driven by an electric motor Tachometric device driven by an electric motor

G - Physics

01

P

73/62

G01P 3/44 (2006.01) G01P 1/04 (2006.01) G01P 3/495 (2006.01)

Patent

CA 1302729

- 9 - ABSTRACT A TACHOMETRIC DEVICE DRIVEN BY AN ELECTRIC MOTOR A tachometric device is provided with a D.C. electric motor a shaft of which drives n pair of permanent magnets to rotate. A first permanent magnet controls a speed indicator unit ; n second permanent magnet is rotatably mounted within a winding the terminals of which are connected to a negative feed back circuit for controlling the speed of the motor . (Figures 1 and 2).

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