RPM Measuring apparatus

Details RPM Measuring apparatus RPM Measuring apparatus

1974-03-05

1976-04-20

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 74, 310 75R, 310 79, H02K 2138

Patent

active

039522202

ABSTRACT:
A rpm measuring apparatus includes a rpm signal generator having a magnetic circuit composed of a toothed disc, driven by a drive shaft, and a yoke carrying an induction coil. At least one portion of the yoke opposite the toothed disc is also provided with teeth. At least one damper having a rpm-dependent damping characteristic is operatively associated with the drive shaft and disposed on the toothed disc.

REFERENCES:
patent: 1955309 (1934-04-01), Packer
patent: 1974871 (1934-09-01), Lansing
patent: 3401287 (1968-09-01), French et al.
patent: 3746902 (1973-07-01), Hetzel
patent: 3819966 (1974-06-01), Noguchi

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