Telegraphy – Systems – Position coordinate determination for writing
Patent
1981-10-27
1984-04-24
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
338114, G08C 2100
Patent
active
044449984
ABSTRACT:
A touch controlled membrane device producing an output signal which is a function of any dual coordinate location resulting from an applied pressure in a two dimensional resistive field. In one preferred embodiment a single resistive film is spaced from a coextensive conductive film. First and second source voltages are alternately applied across orthogonal axis directions of the resistive film to establish voltage gradients in both directions. Pressure applied to the conductive film brings the conductive and resistive films into contact so that a unique two component output signal appears on the conductive film which defines the X and Y coordinates of the location of the applied pressure. In a second embodiment, two resistive films are mounted opposite to two conductive surfaces applied onto opposite sides of an insulative film, and voltage is applied to the resistive films in orthogonally related directions. Pressure applied to one resistive film causes both resistive films to contact the conductive surfaces so that the voltages applied to each conductive surface represent the coordinates of the point of contact.
REFERENCES:
patent: 2866124 (1958-12-01), Giuffrida et al.
patent: 2900446 (1959-08-01), McLaughlin et al.
patent: 2902607 (1959-09-01), Hedger et al.
patent: 2907824 (1959-10-01), Peek
patent: 2973140 (1961-02-01), Katz
patent: 3063018 (1962-11-01), Gordon et al.
patent: 3178566 (1965-04-01), Harpell
patent: 3290495 (1966-12-01), Malmros
patent: 3358151 (1967-12-01), Haase
patent: 3440522 (1969-04-01), Kruse
patent: 3551820 (1970-12-01), Bagwell
patent: 3624583 (1971-11-01), Nakada
patent: 3624584 (1971-11-01), Ohno
patent: 3626350 (1971-12-01), Suzuki et al.
patent: 3668313 (1972-06-01), Dym
patent: 3699492 (1972-10-01), Yoshihara
patent: 3783392 (1974-01-01), Drake et al.
patent: 3789391 (1974-01-01), Brock et al.
patent: 3895288 (1975-07-01), Lampen et al.
patent: 3911215 (1975-10-01), Hurst
patent: 3927593 (1975-12-01), Kawamura
patent: 3952156 (1976-04-01), Lahr
patent: 3968467 (1976-07-01), Lampen et al.
patent: 3982219 (1976-09-01), Rehak
patent: 4014217 (1977-03-01), Lagasse et al.
patent: 4070544 (1978-01-01), Lambden
patent: 4128209 (1978-12-01), Johnson
patent: 4137517 (1979-01-01), Garcea
patent: 4178481 (1979-12-01), Kley
patent: 4203088 (1980-05-01), Sado et al.
patent: 4235141 (1980-11-01), Eventoff
patent: 4268815 (1981-05-01), Eventoff et al.
C. P. Ludeman; Keyboard Employing Voltage Distribution Matrix Position Sensor; Dec. 1974, vol. 17, No. 7, IBM Technical Disclosure Bulletin, pp. 2015-2016.
Broadbent Berne S.
Nydegger Rick D.
Schreyer Stafford D.
Spectra-Symbol Corporation
Workman H. Ross
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