Tachometer device controlled by an electric motor

Details Tachometer device controlled by an electric motor Tachometer device controlled by an electric motor

1979-04-16

1980-12-30

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

With distance registering means

73510, 73519, 324167, G01P 3495, G01P 356

Patent

active

042416078

ABSTRACT:
A device (1) for transmitting rotary motion from a first to a second shaft and for measuring the angular speed of said rotary motion, comprising a first and second pulse generator associated respectively with said first and second shaft, and governing, by means of a processing circuit, the operation of an electric motor (2) of direct current type one shaft (7) of which is torsionally coupled to said second shaft; and a speed indicator comprising means (25) sensitive to magnetic field variations is described. The main feature of this device (1) is that said second pulse generator comprises a magneto-electrical transducer (32), and a permanent magnet (9) is torsionally coupled to said second shaft; said magnet (9) determining the activation either of said magneto-electrical transducer (32), or of those means (25) of said speed indicator which are sensitive to magnetic field variations.

REFERENCES:
patent: 3505879 (1970-04-01), Vanderberg
patent: 3719886 (1973-03-01), Vanderberg et al.
patent: 3863151 (1975-01-01), Hahlganss

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