System of automatically controlling distance in linear movement
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United States of America Patent
Stats
-
Apr 27, 1982
Grant Date -
N/A
app pub date -
Jul 3, 1980
filing date -
Jul 4, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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