Marking device for use with inductive measuring sensor
First Claim
1. A marking device for marking a sheet mounted on a digitizer board of the type having a plurality of spaced, parallel conductors to which the application of current pulses in timed sequence produces a time variable magnetic flux, said marking device comprising:
- a. a measuring coil having torroidal winding for receiving flux produced by said board when said coil is operatively positioned relative to said board;
b. switch means operable to cause said current pulses to be applied to said conductors on said board; and
c. marking means responsive to operation of said switch means for marking said sheet when said coil is operatively positioned relative to said board.
2 Assignments
0 Petitions
Accused Products
Abstract
A marking device for marking a sheet mounted on a digitizer board includes a measuring coil inductively coupled to the digitizer board when the coil is operatively positioned relative to the board. A switch on the marking device is operable to cause current pulses to be applied to the conductors on the digitizer board producing magnetic flux which couples the conductors on the board to the coil. A marker on the marking device is responsive to operation of the switch for marking a thermosensitive sheet on which the measuring coil is placed thereby marking on the sheet the position of the marking device when the switch was closed.
20 Citations
11 Claims
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1. A marking device for marking a sheet mounted on a digitizer board of the type having a plurality of spaced, parallel conductors to which the application of current pulses in timed sequence produces a time variable magnetic flux, said marking device comprising:
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a. a measuring coil having torroidal winding for receiving flux produced by said board when said coil is operatively positioned relative to said board; b. switch means operable to cause said current pulses to be applied to said conductors on said board; and c. marking means responsive to operation of said switch means for marking said sheet when said coil is operatively positioned relative to said board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification