Telegraphy – Systems – Position coordinate determination for writing
Patent
1989-03-09
1990-08-07
Hall, Carl E.
Telegraphy
Systems
Position coordinate determination for writing
29605, G08C 2100
Patent
active
049474600
ABSTRACT:
A transparent disk with a round periphery is produced, for example, by a grinding operation, and a mark is placed at the geometric center of the disk. A coil is then wound about the periphery of the disk. As a consequence, the mark at the geometric center of the disk coincides with the electrical center point of the coil, thus obviating the need for a bobbin, or coil former, on which the coil can be wound.
The transparent disk is first ground into a round shape, and a metallic film is deposited on a surface of the disk. The film is coated with a photosensitive resist material, and then exposed through a mask to define an image of a mark at the geometric center of the disk. The film is then etched to remove all but the mark from the disk.
In manufacturing the coil, the disk is concentrically clamped between two plates of a winding jig, each plate having annular peripheral flanges that are radially larger than the disk and thus project beyond the periphery of the disk. The flanges are spaced from each other to define a winding space around the periphery of the disk. A wire may then be wound on the periphery of the disk in the space between the flanges to form a coil. Thereafter, the turns of wire may be bonded to themselves and to the periphery of the disk.
REFERENCES:
patent: 3359630 (1967-12-01), Metz
patent: 3647963 (1972-03-01), Bailey
patent: 3982165 (1976-09-01), Rich
patent: 4061966 (1977-12-01), Sedlacek et al.
patent: 4185165 (1980-01-01), Fencl
patent: 4194084 (1980-03-01), Hetzel
patent: 4206314 (1980-06-01), Purgh et al.
patent: 4243843 (1981-01-01), Rocheleau
patent: 4368351 (1983-01-01), Zimmer
patent: 4368352 (1983-01-01), Davis
patent: 4451698 (1984-05-01), Whetstone et al.
patent: 4577058 (1986-03-01), Collins
Jacob-Grinschgl Wolfgang
Muller Udo
Hall Carl E.
Kontron Elektronik GmbH
LandOfFree
Cursor for an inductive sensor for use with a digitizer board does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cursor for an inductive sensor for use with a digitizer board, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cursor for an inductive sensor for use with a digitizer board will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-966362