Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1992-04-16
1993-12-14
Brier, Jeffery
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
33 1M, 178 18, G09G 500
Patent
active
052706923
ABSTRACT:
This is a low-cost cursor for a digitizing tablet which provides the user with the feel of a mouse. There is a case bottom piece for sliding on the surface of the digitizing tablet and a pair of microswitches. A printed circuit board fits in the case bottom piece with the pair of switches mounted behind one another thereon. A transparent front-piece is disposed over the printed circuit board with slots therethrough through which the switches are disposed. The front-piece has a front portion extending outward from a front end and parallel to the bottom surface and has an annular armature formed thereon with a concentric pair of cross-hairs and a sensing coil of wire wound around the armature. A connecting cable of wires is connected to the sensing coil of wire and the switches. There is also a case top piece attached over the case bottom piece to form a hollow case which is tapered from back to front to give the case the feel of a mouse. The case top piece has a pair of longitudinal side pieces with a torsion mounting strip extending transversely between them. The torsion mounting strip comprising a rectangular torsion bar having a vertical member extending upward therefrom with a switch actuator arm formed at the top and generally in the contour of the top surface of the top piece. The switch actuator arm has a pair of actuator fingers extending downward therefrom on opposite sides of the vertical member in alignment with and in close proximity to actuator buttons of the switches.
REFERENCES:
patent: 4429200 (1984-01-01), Glenn et al.
patent: 4652871 (1987-03-01), Tsukada et al.
patent: 4739315 (1988-04-01), Soma et al.
patent: 4806917 (1989-02-01), Hosogoe
patent: 4906843 (1990-03-01), Jones et al.
patent: 4952919 (1990-08-01), Nippoldt
Brier Jeffery
CalComp Inc.
Porter, Jr. Wm. F.
Streck Donald A.
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