Dual timing event stopwatch
First Claim
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1. A dual timing event stopwatch, comprising:
- first timing means for measuring elapsed time between an applied start signal initiating said measurement and a subsequently applied stop signal terminating said elapsed time measurement;
first display means associated with said first timing means for displaying said elapsed time measured between said start and stop signals;
second timing means for measuring elapsed time between an applied start signal initiating said measurement and a subsequently applied stop signal terminating said measurement;
second display means associated with said second timing means for displaying said elapsed time measured thereby;
optical pick-up means for detecting a remote light emission and for generating a signal in response thereto, said optical means being connected to said first timing means for initiating said elapsed time measurement;
switch means connected to said second timing means for providing thereto a measurement initiating start signal on a first actuation of said switch means and a measurement terminating stop signal on a second actuation thereof; and
mode selection means associated with said first timing means and operable for user selection between a first operating mode wherein the stop signal for terminating elapsed time measurement by said first timing means is provided on said second actuation of said switch means, and a second operating mode wherein the stop signal for terminating measurement by the first timing means is provided by said optical pick-up means in response to a remote light emission.
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Abstract
A dual timing event stopwatch incorporates a primary timer triggered by a remote light emission detected by an optical pick-up sensor, and a secondary timer manually triggered by a user-actuated switch. The user may select between a first operating mode wherein both timers are concurrently stopped in their interval counted cycles by a manually operated switch, and a second operating mode wherein the second timer is terminated by the manual switch and the first timer is terminated by a second remote light emission detected by the optical pick-up sensor.
73 Citations
14 Claims
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1. A dual timing event stopwatch, comprising:
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first timing means for measuring elapsed time between an applied start signal initiating said measurement and a subsequently applied stop signal terminating said elapsed time measurement; first display means associated with said first timing means for displaying said elapsed time measured between said start and stop signals; second timing means for measuring elapsed time between an applied start signal initiating said measurement and a subsequently applied stop signal terminating said measurement; second display means associated with said second timing means for displaying said elapsed time measured thereby; optical pick-up means for detecting a remote light emission and for generating a signal in response thereto, said optical means being connected to said first timing means for initiating said elapsed time measurement; switch means connected to said second timing means for providing thereto a measurement initiating start signal on a first actuation of said switch means and a measurement terminating stop signal on a second actuation thereof; and mode selection means associated with said first timing means and operable for user selection between a first operating mode wherein the stop signal for terminating elapsed time measurement by said first timing means is provided on said second actuation of said switch means, and a second operating mode wherein the stop signal for terminating measurement by the first timing means is provided by said optical pick-up means in response to a remote light emission. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dual timing event stopwatch, comprising:
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first and second timing means each triggerable at an input thereof for initiating and terminating measurement of an elapsed time interval; first and second display means, each associated with a respective one of said timing means for indicating the elapsed time interval measured thereby; optical pick-up means for detecting a remote light emission and for generating a trigger signal in response thereto, and connected to the input of said first timing means; start/stop switch means manually actuatable for generating a trigger signal and connected to said first and second timing means; and mode selection means for user selection between a first operating mode wherein first timing means measurement is initiated by a trigger signal generated by said optical pick-up means, second timing means measurement is initiated by a first trigger signal generating actuation of said start/stop switch means, and both said timing means interval measurements are terminated by a second actuation of said start/stop switch means, and a second operating mode wherein first timing means measurement is both initiated and terminated by trigger signals generated by said optical pick-up means in response to the detection of remote light emissions, and second timing means interval measurement is both initiated and terminated by sequential trigger signal generating actuations of said start/stop switch means. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification