Position encoding arrangements

Details Position encoding arrangements Position encoding arrangements

1977-01-19

1978-10-24

Trafton, David L.

Communications: electrical

Systems

With specific power supply

178 18, 250549, 340365P, G06K 1520

Patent

active

041224388

ABSTRACT:
A position encoding arrangement is provided having a position locating area from which the positioned co-ordinates of a probe in the area can be found. The invention provides for a change of magnification of the arrangement so that movement of the probe produces a scaled down change in positional co-ordinates. A preferred embodiment provides a light beam encoder for use in conjunction with a C.R.T. type display where a probe is detected and a marker appears on the screen. With the invention change in magnification allows scaled down movement of the marker to allow accurate positioning.

REFERENCES:
patent: 3292489 (1966-12-01), Johnson et al.
patent: 3576574 (1971-04-01), Baskin et al.
patent: 3659281 (1972-04-01), Mori
patent: 3732369 (1973-05-01), Cotter
patent: 3775560 (1973-11-01), Ebeling et al.
patent: 3860754 (1975-01-01), Johnson et al.

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