System of automatically controlling distance in linear movement

Details System of automatically controlling distance in linear movement System of automatically controlling distance in linear movement

1980-07-03

1982-04-27

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

367 96, G01S 1100

Patent

active

043274277

ABSTRACT:
The disclosure relates to a system of automatically controlling the distance between two members placed in a relatively variable relation with each other with respect to distance on a straight line. One of the two members is provided with a transmitter capable of generating an ultrasonic pulse excellent both in directivity and in damping characteristics, and the other is provided with a receiver with the same in characteristics as the transmitter and which is disposed in an opposed relation with respect to the transmitter. The distance between the two members is automatically controlled by causing an ultrasonic pulse to be transmitted and received respectively by the transmitter and the receiver.

REFERENCES:
patent: 3427481 (1969-02-01), Lenahan et al.
patent: 3824464 (1974-07-01), Rotier et al.
patent: 4084149 (1978-04-01), Driver et al.

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