Sonic positioning device

Details Sonic positioning device Sonic positioning device

1985-01-25

1989-08-29

Caldwell, Sr., John W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

367104, 367117, 367907, 178 18, 901 1, G09G 302

Patent

active

048621528

ABSTRACT:
A three-dimensional ultrasonic position control device suitable for controlling computer displays or robot movements is disclosed.
More specifically, signals from an ultrasonic transmitter are received by multiple receivers. The received signals are processed by a processing circuit which provides signals to a computer system for use in controlling a computer display or a robot. This system is particularly adapted to use inexpensive components to provide for a low cost mass producible control device.

REFERENCES:
patent: 3504334 (1970-03-01), Turnage
patent: 3792243 (1974-02-01), Appel et al.
patent: 3838212 (1974-09-01), Whetstone et al.
patent: 4317005 (1982-02-01), de Bruyne
patent: 4506354 (1985-03-01), Hansen
patent: 4524348 (1985-06-01), Lefkowitz
patent: 4564928 (1986-01-01), Glenn et al.
patent: 4654648 (1987-03-01), Herrington et al.
"Ultrasonic Cursor Position Detection", IBM Tech. Discl. Bulletin; vol. 27, No. 11, Apr. 85.

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