Rotational speed sensor

Details Rotational speed sensor Rotational speed sensor

G - Physics

01

P

73/62, 73/68

G01P 3/44 (2006.01) G01P 1/04 (2006.01) G01P 3/487 (2006.01)

Patent

CA 1195859

Abstract of the Invention Rotational speed of a rigid or flexible member is converted to an alternating magnetic signal, by passage of a multipolar permanent magnet rotor close to the interleaved pole pieces of two magnetic combs. The combs comprise extensions parallel to the rotor axis from the outer peri- pheries of two radially broad rings. Their inner edges may be magnetically connected together. Each ring with its pole pieces is an integral mild steel magnetizable spider. The rings are axially spaced and a pick-up coil lies between them, to transduce an electrical alternating signal to the outside world.

431890

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