Shaft speed signal indicator

Details Shaft speed signal indicator Shaft speed signal indicator

1992-11-18

1995-06-13

O'Shea, Sandra L.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324174, G01P 3484, G01P 3487

Patent

active

054246350

ABSTRACT:
A shaft speed signal indicator including a hub, bearing, switch assembly and housing which are mounted as a compact and integral unit to a free end of a revoluble shaft. The signal indicator further includes electric circuitry connected to contacts of the switch assembly for signalling the rotational speed of the revoluble shaft relative to a predetermined revolution rate. The hub carries a plurality of magnets for rotation about a predetermined path and to cause the contacts of the switch assembly to operate at a rate proportional to the movement of the magnets therepast. The housing of the signal indicator maintains the contacts of the switch assembly at a predetermined distance from the magnets and includes an exterior configuration substantially encompassing the hub and shields the end of the revoluble shaft.

REFERENCES:
patent: 3611343 (1971-10-01), Schoenbach
patent: 4663601 (1987-05-01), Troutman et al.
patent: 4787072 (1988-11-01), Joy
patent: 4890059 (1989-12-01), Guentner
patent: 4901014 (1990-02-01), Riegger et al.
patent: 5010290 (1991-04-01), Foster
patent: 5066910 (1991-11-01), Sugiyama

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