Keyboard system with variable automatic repeat capability
First Claim
1. Apparatus comprising in combination a keyboard system including a plurality of pressure actuatable keys, means including a transducer circuit and being responsive to the actuating pressure applied to any one of a number of said keys for generating an output signal having an amplitude related to said actuating pressure as applied to the actuated one of said number of keys, means responsive to actuation of all of said keys for accessing indicia corresponding to the actuated key, and a repeat circuit including said actuating pressure responsive means and having a converter circuit coupled to said last mentioned means for converting said output signal into a repeat signal during continued actuation of said one of said number of keys, said repeat signal undergoing repetitive state transition at a rate related to said amplitude of the output signal, and said means for accessing indicia further responds to said repeat signal by repetitively accessing the indicium corresponding to said one of said number of keys.
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Abstract
A keyboard system having a plurality of actuable keys is coupled through a central processing unit to an indicia accessing unit for accessing indicia corresponding to said keys. An automatic repeat circuit also interconnects the keyboard system with the central processing unit and includes pressure transducer means responsive to actuating pressure on said keys for producing an amplitude variable signal which causes a signal convertor to produce a corresponding rate variable signal which when fed to the central processing unit causes repetitive accessing of the corresponding indicia at a selectable rate. Feedback from the central processing unit to the repeat circuit determines which key signals are to be operative for repetitive indicia access.
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Citations
8 Claims
- 1. Apparatus comprising in combination a keyboard system including a plurality of pressure actuatable keys, means including a transducer circuit and being responsive to the actuating pressure applied to any one of a number of said keys for generating an output signal having an amplitude related to said actuating pressure as applied to the actuated one of said number of keys, means responsive to actuation of all of said keys for accessing indicia corresponding to the actuated key, and a repeat circuit including said actuating pressure responsive means and having a converter circuit coupled to said last mentioned means for converting said output signal into a repeat signal during continued actuation of said one of said number of keys, said repeat signal undergoing repetitive state transition at a rate related to said amplitude of the output signal, and said means for accessing indicia further responds to said repeat signal by repetitively accessing the indicium corresponding to said one of said number of keys.
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8. Apparatus comprising in combination a keyboard system including a plurality of pressure actuatable keys, means responsive to the actuating pressure applied to any one of a number of said keys for generating an output signal having an amplitude related to said actuating pressure as applied to the actuated one of said number of keys, means responsive to actuation of all of said keys for accessing indicia corresponding to the actuated key, and a repeat circuit including said actuating pressure responsive means for generating during continued actuation of said one of said number of keys a digital repeat signal from said output signal which digital signal undergoes repetitive state transition at a rate related to said amplitude of the output signal, and said means for accessing indicia further responds to said repeat signal by repetitively accessing the indicium corresponding to said one of said number of keys.
Specification