Controllable cursor vacuum hold down

Details Controllable cursor vacuum hold down Controllable cursor vacuum hold down

1980-07-11

1981-11-17

Robinson, Thomas A.

Telegraphy

Systems

Position coordinate determination for writing

248362, G08C 2100, A45D 4214

Patent

active

043013260

ABSTRACT:
A cursor for a digitizer is selectively made to adhere to the digitizing surface by the controlled application of a vacuum to the underside of the cursor. The control can reside either in a manually activated switch on the cursor, or in commands issued to the digitizer by its controlling device.

REFERENCES:
patent: 3568663 (1971-03-01), Phipps
patent: 3876831 (1975-04-01), Wickham et al.

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