US3686880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled stop watch
Assignee: Individual
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Filing: 1971-09-07
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Granted: 1972-08-29
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Expires: 1991-09-07
Abstract
Abstract An electronically controlled stop watch in which the output frequency of a standard frequency oscillator is divided by a frequency divider means, the divided frequency is counted by a counter means, the starting and stopping of this counting are controlled by a start-stop switch means, and by supplying power to a display means and a register means by the operation of a time display switch means, the content of said counting is displayed in a display device. Preferably a single indicating lamp indicates the off-on condition of a main power switch and also whether or not the counter is counting. The display means is preferably powered by an output of the frequency divider to conserve power. Moreover, reset means is preferably related to the counter control so that the register means cannot be accidentally reset during counting.
Inventors
- 👤 Toshihide Samejima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:12
CPC Classifications
G; G04; G04G; G04G9/00; G04F; G04F10/00; G04F10/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
125 words
An electronically controlled stop watch comprising; a power source, a standard frequency oscillator, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to produce a counting output thereof, register means for receiving and registering said counting output, display means actuated by the output signal of said register means, start-stop switch means for starting and stopping the counting of said counter means by controlling said frequency divider means, reset means for resetting said frequency divider means and counter means, and time display switch means for supplying power to said register means and display means only when a time is to be displayed in said display means by the counting output of said counter means.
Claim 2
Dependent Claim
125 words
An electronically controlled stop watch comprising; a power source, a standard frequency oscillator, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to produce a counting output thereof, register means for receiving and registering said counting output, display means actuated by the output signal of said register means, start-stop switch means for starting and stopping the counting of said counter means by controlling said frequency divider means, reset means for resetting said frequency divider means and counter means, and time display switch means for supplying power to said register means and display means only when a time is to be displayed in said display means by the counting output of said counter means.
Claim 3
Dependent Claim
48 words
An electronically controlled stop watch according to claim 1, in which said frequency divider means include gate means, and said start-stop switch means includes a start-stop switch controlling the opening and closing of said gate means to control the starting and stopping of counting of said countEr means.
Claim 4
Dependent Claim
46 words
An electronically controlled stop watch according to claim 2, in which said start-stop means further includes an action indicating switch interlinked with said start-stop switch and action indicating means controlled by said action indicating switch to indicate the on or off state of said start-stop switch.
Claim 5
Dependent Claim
53 words
An electronically controlled stop watch according to claim 3, in which said action indicating switch has two portions in one of which it supplies continuous current from said power source to said action indicating means and in the other of which it supplies intermittent current from said counter means to said indicating means.
Claim 6
Dependent Claim
140 words
An electronically controlled stop watch comprising; a power source, a standard frequency oscillator for producing a standard frequency, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to provide a time counting output thereof, register means for receiving and registering said time counting output, display means actuated by the output signal of said register means, start-stop switch means for starting and stopping the counting of said counter means by controlling said frequency divider means, reset switch means for resetting said frequency divider means and counter means, and time display switch means including a time duration indication switch for supplying power to said register means and to said display means only when a time is displayed in said display means by the time counting output of said counter means.
Claim 7
Dependent Claim
140 words
An electronically controlled stop watch comprising; a power source, a standard frequency oscillator for producing a standard frequency, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to provide a time counting output thereof, register means for receiving and registering said time counting output, display means actuated by the output signal of said register means, start-stop switch means for starting and stopping the counting of said counter means by controlling said frequency divider means, reset switch means for resetting said frequency divider means and counter means, and time display switch means including a time duration indication switch for supplying power to said register means and to said display means only when a time is displayed in said display means by the time counting output of said counter means.
Claim 8
Dependent Claim
57 words
An electronically controlled stop watch according to claim 5, in which said register means includes gate means, and said time display switch means further includes a lap power switch for supplying power to said register means and display means, and a lap display switch controlling the opening and closing of the gate means of said register means.
Claim 9
Dependent Claim
25 words
An electronically controlled stop watch according to claim 6 in which said lap power switch and said lap display switch are interlinked with each other.
Claim 10
Dependent Claim
163 words
An electronically controlled stop watch comprising; a power source, a standard frequency oscillator for producing a standard frequency, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to provide a counting output thereof, register means for receiving and registering said time counting output, display means actuated by the output signal of said register means, start-stop switch means for starting and stopping the counting of said counter means by controlling said frequency divider means, reset switch means including a reset switch to change over said frequency divider means and said counter means to reset level and reset release level, and a reset power switch to control the supply of power to said register means and display means, and a time display switch means for supplying power to said register means and display means only when a time is displayed in said display means by the time counting output of said counter means.
Claim 11
Dependent Claim
163 words
An electronically controlled stop watch comprising; a power source, a standard frequency oscillator for producing a standard frequency, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to provide a counting output thereof, register means for receiving and registering said time counting output, display means actuated by the output signal of said register means, start-stop switch means for starting and stopping the counting of said counter means by controlling said frequency divider means, reset switch means including a reset switch to change over said frequency divider means and said counter means to reset level and reset release level, and a reset power switch to control the supply of power to said register means and display means, and a time display switch means for supplying power to said register means and display means only when a time is displayed in said display means by the time counting output of said counter means.
Claim 12
Dependent Claim
24 words
An electronically controlled stop watch according to claim 8, in which said reset switch and said reset power switch are interlinked with each other.
Claim 13
Dependent Claim
51 words
An electronically controlled stop watch according to claim 8, in which said frequency divider means and said counter means have reset terminals connected by a reset line to said reset switch means and in which said reset line is interconnected with said start-stop switch means to prevent resetting during said counting.
Claim 14
Dependent Claim
137 words
An electronically controlled stop watch comprising; a power supply, a standard frequency oscillator for producing a standard frequency, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to produce a time counting output thereof, register means for receiving and registering said time counting output, display means actuated by an oUtput signal of said register means, start-stop switch means controlling said frequency divider means to control the starting and stopping of counting by said counter means, reset means for resetting said frequency divider means and counter means, and time display means for supplying high frequency power from said frequency divider to said register means and display means only when a time is displayed in said display means by the time counting output of said counter means.
Claim 15
Dependent Claim
137 words
An electronically controlled stop watch comprising; a power supply, a standard frequency oscillator for producing a standard frequency, frequency divider means for dividing said standard frequency to provide a selected time signal, counter means for counting said time signal to produce a time counting output thereof, register means for receiving and registering said time counting output, display means actuated by an oUtput signal of said register means, start-stop switch means controlling said frequency divider means to control the starting and stopping of counting by said counter means, reset means for resetting said frequency divider means and counter means, and time display means for supplying high frequency power from said frequency divider to said register means and display means only when a time is displayed in said display means by the time counting output of said counter means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |