Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1991-04-01
1992-09-15
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367910, G01S 1500
Patent
active
051484110
ABSTRACT:
A distance measuring device including a casing bearing a visual display and incorporating therein a transmitter for directing signals toward a selected surface; a receiver for detecting echoes from the selected surface; distance calculating circuitry for measuring the distance to a selected surface in accordance with the transit time of the signal; visually displaying the calculated distance; memory for storing at least two displayed distances measured in perpendicular directions; multiplication circuitry for multiplying the stored measurements; and visually displaying the product of the multiplication. The device further includes a key to effect the operation of the device whereby a distance is displayed, another key to initiate the storage of a displayed distance; and a key to initiate the multiplication of the stored distance measurements.
REFERENCES:
patent: 4297701 (1981-10-01), Henriques
patent: 4464738 (1984-08-01), Czajkowski
patent: 4730190 (1988-03-01), Win et al.
Exact Electronics Dimensional Measurement Computer, 1987.
Pihulic Daniel T.
Solar Wide Industrial Ltd.
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