Apparatus for generating a signal representative of a co-ordinat

Telegraphy – Systems – Position coordinate determination for writing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H04N 100, G08C 2100

Patent

active

043784658

ABSTRACT:
Apparatus is disclosed for generating a signal representative of a co-ordinate position of a movable indicating member, the member being constructed for interacting magnetically with sensing coils. The apparatus includes a plurality of sensing coils (2 to 11) for interacting magnetically with such a member, the coils being positioned substantially in or adjacent to a real or imaginary surface in or adjacent to which such an indicating member may be moved, the sensing coils being positioned to divide an area of interest in the surface into regions, each of the coils encircling part of the area of interest and having conductors in the area substantially along region boundaries only, each of the regions being within an arrangement of the sensing coils particular to that region. A further coil (1) is positioned substantially in or adjacent to the real or imaginary surface and surrounds the entire area of interest. There are a first one (2) and a second one (3) of the sensing coils which have conductors at substantially the same pitch but which coils are offset relative to each other. Processing means (16, D2 to D11, 17, G2 to G11 and L1 to L9) includes an exclusive-OR gate (15), an output of each of the first and second ones of the sensing coils being coupled only to a respective input of this gate. The processing means uses the output signal of the exclusive-OR gate and other signals derived from the sensing coils with reference to the signal in the further coil to produce a binary coded signal representative of a co-ordinate position of such a member.

REFERENCES:
patent: 3466646 (1969-09-01), Lewin
patent: 3819857 (1974-06-01), Inokuchi
patent: 4029899 (1977-06-01), Gordon
"Inductive Transducers for Graphical Input Devices", by Ivaslchertzo et al, Soviet Inst'n. and Control, No. 8, Aug. 1969.

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

Apparatus for generating a signal representative of a co-ordinat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for generating a signal representative of a co-ordinat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for generating a signal representative of a co-ordinat will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1204743

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