Multi-axis trackball

Details Multi-axis trackball Multi-axis trackball

1988-07-21

1990-06-12

Moore, David K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340706, 340710, 273148B, G09G 302

Patent

active

049336703

ABSTRACT:
A first electromechanical transducer (40) generates a first electrical signal indicative of rotation of a ball (A) relative to a first axis. A second electromechanical transducer (50) generates a second electrical signal indicative of rotation of the ball relative to a second axis. A third electromechanical transducer (60) generates a third electrical signal indicative of rotation of an annular ring (12) around the periphery of the ball, i.e. a third axis. A resolver circuit (D) converts the first, second, and third electrical signals into an indication of movement or position along the first, second, and third axes.

REFERENCES:
patent: 4562347 (1985-12-01), Hovey et al.
patent: 4801931 (1989-01-01), Schmidt
patent: 4963116 (1988-08-01), Eichholz
patent: 4987051 (1988-11-01), Olson
Fast Trap, "The Three Axis Pointing Device of the Future is here Now", advertising literature from Microspeed, Inc., 1987.
Fast Trap, External Reference Specification-Preliminary Release, advertising literature from Microspeed, Inc., 1987.

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