Pen tip position detector

Details Pen tip position detector Pen tip position detector

1987-12-11

1989-12-19

Harkcom, Gary V.

Boots, shoes, and leggings

346 49, 346139R, G06K 500, G01D 1800

Patent

active

048887102

ABSTRACT:
Apparatus, for use in conjunction with a digital plotter incorporating controlled multiple markers to create displays, for determining the position of the markers along axes of movement, comprises a detector assembly disposed at a fixed axial position relative to the plotter, and a driver for moving a marker relative to the detector assembly. The detector assembly includes means for detecting movement of the marker relative thereto and producing signals indicative of the movement. A processor interprets the signals for determining an axial position of the marker and optionally detects and compensates for a variation in the axial position of a current marker relative to the axial position of a prior marker.

REFERENCES:
patent: 3555254 (1971-01-01), Gerber
patent: 3686681 (1972-08-01), Stegenga
patent: 4328507 (1982-05-01), Kyogoku
patent: 4503441 (1985-03-01), Tamukai
patent: 4567565 (1986-01-01), Haselby et al.
patent: 4573129 (1986-02-01), Tribolet et al.
patent: 4630483 (1986-12-01), Engdahl
patent: 4660055 (1987-04-01), Enda
patent: 4677572 (1987-06-01), Gunderson et al.

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