Position indicating system

Details Position indicating system Position indicating system

1987-11-23

1988-12-20

Miller, Charles D.

Coded data generation or conversion

Digital pattern reading type converter

Magnetic, inductive or capacitive

324208, H03M 122

Patent

active

047927887

ABSTRACT:
A rotatable member having multiple discrete positions between opposite ends of a normal path of movement is provided with two (or three) parallel, encoded tracks having different patterns of distinct, serial sections. These tracks cooperate with relatively stationary probes of a position sensor. As the rotatable member moves from position to position, the sensor will produce a family of two (or three) separate binary signals that changes states as the probes detect boundaries between successive sections of the tracks with which they respectively communicate, and the patterns of the encoded sections are so selected that the sequence of state changes when the rotatable member is approaching a predetermined mid position will differ from the sequence when the member is moving away therefrom.

REFERENCES:
patent: 3197763 (1965-07-01), Fisher
patent: 4072893 (1978-02-01), Huwyler
patent: 4157507 (1979-06-01), Desai et al.
patent: 4274053 (1981-06-01), Ito et al.
patent: 4328463 (1982-05-01), Avins
patent: 4599561 (1986-07-01), Takahashi et al.
patent: 4658214 (1987-04-01), Petersen
patent: 4736187 (1988-04-01), Kibrick

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