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US 4,385,204 AGranted
Single button control
AssigneeRCA Corporation
InventorCharles M. Wine
Life of this patent
Estimating the term…
Abstract
A volume control system includes means responsive to a single push button for reversing the direction of volume level change for each alternate depression of the push button. Specifically, for a first depression of the push button, the volume is continuously increased so long as the push button is held down. For a second depression of the push button, the volume is continuously decreased so long as the push button is held down. The disclosed system saves the cost of an additional push button while providing an easy-to-use system for volume level adjustment.
Claims9
A control system comprising:
- a user activated switching element selectively having an activated state when activated by a user and a released state when not activated by a user, said switching element automatically returning to said released state when no longer activated by a user;
- and
- control means responsive to said activated state of said switching element when said switching element is activated a first time in a sequence of activations for continuously increasing a control function so long as said switching element is activated, and responsive to the same said activated state of said switching element when said switch element is activated a second time in said sequence for continuously decreasing said control function so long as said switching element is activated.
A control system comprising:
- a user activated switching element selectively having an activated state when activated by a user and a released state when not activated by a user, said switching element automatically returning to said released state when no longer activated by a user;
- function control means having first and second input control terminals for generating a control signal and for selectively increasing and decreasing said control signal, wherein a first level of binary signal on said first input control terminal causes said control signal to continuously increase, and wherein said first level of binary signal on said second input control terminal causes said control signal to continuously decrease;
- a flip-flop having a clock terminal, a data input terminal, a data output terminal, and a complemented data output terminal;
- means for conditioning said flip-flop to change states whenever a clock signal is applied to its clock terminal;
- first and second coincidence gates having respective first and second input terminals and a respective output terminal, said output terminals of said first and second coincidence gates being connected to respective first and second input control terminals of said function control means, said first input terminal of said first gate being connected to said data output terminal, said first input terminal of said second coincidence gate being connected to said complemented data output terminal of said flip-flop;
- means for connecting said clock terminal of said flip-flop to said switching element so that clock signal is applied to said clock terminal when said switch element has said activated state;
- and
- means for connecting said clock terminal of said flip-flop to said second input terminals of said first and second coincidence gates.
5 more elements
Dependencies are inferred from the claim text.