초록 ▼

In an improved digital timepiece having a chronometric display in which a digital timing means provides chronometric timing signals thereto, includes first condition responsive means responsive to an enabling signal for activating the chronometric display to provide a chronometric display from the t

In an improved digital timepiece having a chronometric display in which a digital timing means provides chronometric timing signals thereto, includes first condition responsive means responsive to an enabling signal for activating the chronometric display to provide a chronometric display from the timing signal, the improvement comprises electronic means responsive to human touch for providing the enabling signal. The electronic means comprises a resistive sensitive voltage divider switch means which provides a resistive impedance path to ground in response to human touch thereof, and second condition responsive means which provides the enabling signal to the first condition responsive means initially in response to the resistive impedance path to ground being provided. Delay means are operatively connected between the second condition responsive means output and the first condition responsive means input which is responsive to the provision of the resistive impedance path for maintaining the first condition responsive means input signal as the enabling signal for a predetermined delay interval while the human touch responsive means is still providing a resistive impedance path to ground, the delay means thereafter changing the first condition responsive means input signal from the enabling signal to a different input signal while the enabling signal is still being provided from the second condition responsive means output to revert the first condition responsive means to its initial condition which deactivates the chronometric display. Instead of being responsive to human touch, he electronic means can have a controlled sensitivity so as to be solely responsive to conductive touch which provides a conductive voltage of less than the voltage at which water is substantially conductive with the electronic means in such instance comprising at least a pair of spaced apart conductive touchable means connected between the power source and the second condition responsive means whereby the provision of the chronometric display is insensitive to the conductively bridgeable touch of conductive contaminants between the spaced apart conductive touchable means pair which provides a conductive voltage equal to or greater than the voltage at which water is substantially conductive.

대표청구항 ▼

In a digital timepiece having a chronometric display means, a digital timing means operatively connected to said display means for providing chronometric timing signals thereto, and a power source means operatively connected to said timing means and display means for enabling the operation thereof,

In a digital timepiece having a chronometric display means, a digital timing means operatively connected to said display means for providing chronometric timing signals thereto, and a power source means operatively connected to said timing means and display means for enabling the operation thereof, said digital timing means including first condition responsive means having an initial condition and an enable condition, said first condition responsive means being responsive to an enabling signal for changing from said initial condition to said enable condition for activating said chronometric display means only in said first condition responsive means enable condition to provide a chronometric display from said timing signal; the improvement comprising electronic means responsive to human touch for providing said enabling signal to said first condition responsive means, said electronic means comprising a resistive sensitive voltage divider switch means, said voltage divider means comprising conductive touchable means capable of providing a resistive impedance path to ground in response to human touch thereof, second condition responsive means having an initial condition and an enable condition, said voltage divider means providing an input signal to said second condition responsive means to control the condition thereof, said second condition responsive means condition being dependent on said input signal provided thereto, said touchable means being connectable between said power source and ground, said human touch of said touchable means rendering said touchable means conductive to ground to provide said resistive impedance path to change said second condition responsive means input signal from a first signal to a second signal, said second condition responsive means being responsive to said second signal for changing said second condition responsive means from said initial condition to said enable condition in response to said touchable means being rendered conductive to ground by said touch, said first condition responsive means condition being dependent on an input signal provided thereto and being in said enable condition only in response to receipt of said enabling signal as said input signal thereto, said first condition responsive means input being operatively connected to said second condition responsive means output for receiving said enabling signal therefrom, and delay means operatively connected between said second condition responsive means output and said first condition responsive means input, said delay means being responsive to the provision of said resistive impedance path for mainTaining said first condition responsive means input signal as said enabling signal for a predetermined delay interval while said touchable means is still providing said resistive impedance path, said delay means thereafter changing said first condition responsive means input signal from said enabling signal to a different input signal while said enabling signal is still being provided from said second condition responsive means output, said first condition responsive means reverting to said initial condition from said enable condition in response to said different input signal, whereby said chronometric display is terminated after said predetermined delay interval during a continuous provision of said enabling signal for an interval in excess of said predetermined delay interval.