Coordinates input apparatus

Telegraphy – Systems – Position coordinate determination for writing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G08C 2100

Patent

active

049994611

ABSTRACT:
A coordinates input apparatus has a tablet including X- and Y-direction position detecting portions having a multiplicity of loop coils arranged in parallel with one another in X- and Y-directions, respectively, the X- and Y-direction position detecting portions being superposed one on the other. The apparatus also has a position appointing device incorporating a tuning circuit capable of making resonance with electric wave produced from one of the loop coils. The loop coils are successively selected in a one-by-one fashion and an A.C. signal of a predetermined frequency is supplied to the thus selected loop coil. The electric wave causes a tuning of the tuning circuit in the position appointing device so that a voltage of a frequency substantially the same as the above-mentioned predetermined frequency is generated in the loop coil which is near the position appointing device. The position appointed by the position appointing device is therefore detected by sensing the induced voltage of a frequency substantially equal to the predetermined frequency of the A.C. voltage, through a processing by a suitable processing device. Since the position appointing device need not be connected to any stationary portion of the apparatus, the coordinates data can be input with a high degree of maneuverability and with a distinguished precision. It is also possible to display the data input through the position appointing device or the data transmitted thereto through a transmission line.

REFERENCES:
patent: 3299424 (1967-01-01), Vinding
patent: 4609776 (1986-09-01), Murakami et al.
patent: 4616106 (1986-10-01), Fowler et al.
patent: 4697050 (1987-09-01), Farel et al.
patent: 4697244 (1987-09-01), Murakami et al.
patent: 4709209 (1987-11-01), Murakami et al.
patent: 4713496 (1987-12-01), Kimura et al.
patent: 4831566 (1989-05-01), Matthews
patent: 4848496 (1989-07-01), Murakami et al.
patent: 4878553 (1989-11-01), Yamanami et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Coordinates input apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coordinates input apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coordinates input apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-449521

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.