US4058971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital wristwatch and stopwatch
Assignee: Raytheon Co
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Filing: 1976-04-26
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Granted: 1977-11-22
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Expires: 1996-04-26
Abstract
Abstract A resettable interval timer in combination with, but functioning independently from a digital watch which provides horological information. The watch operates in two modes; the first mode displaying horological information on the display devices and the second or stopwatch mode displaying interval timing information on the display devices. In the watch mode the user can program which horological information he desires to be continuously displayed on the display devices, either hours, minutes, and seconds, or hours, minutes, and date. By depressing one of the watch push buttons the user can momentarily display month, date, and the A.M. or P.M. horological information on the display devices. A predetermined push button depression sequence can be used to reset the horological information. When a second push button is depressed a predetermined number of times within a defined time interval the watch enters the stopwatch mode. In the stopwatch mode the user can reset the interval timing counters to zero, start the interval timer, stop the interval timer, freeze the interval timing information currently on the display devices (split or lap time), return the counters to the interval timing mode, and finally return the watch to the watch mode.
Inventors
- 👤 Ronald D. Epperson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:30
CPC Classifications
G; G04; G04F; G04F10/00; G04F10/04; G04G; G04G9/00; G04G9/08; G04G9/087
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
260 words
A resettable interval timer in combination with, but functioning independently from a digital watch which provides horological information comprising: a plurality of push buttons; a crystal oscillator; a first and second divider connected to said oscillator for dividing the pulses from said oscillator; first counting means for providing inputed coded horological information; second counting means for providing inputed coded interval timing information; a plurality of display devices for displaying said horological and said interval timing information; watch control logic means connected to said first divider for multiplexing said horological information to predetermined display device depending upon the sequence in which said push buttons are depressed; stopwatch control logic means connected to said second divider for multiplexing said interval timing information to predetermined display devices depending upon the sequence in which said push buttons are depressed; pulse detection means connected between said push buttons and said watch and stopwatch control logic means for detecting a predetermined number of push button depressions within a predetermined time period; watch counter select logic means connected between said watch control logic means and said first counting means for slewing and advancing said horological information in said first counting means; stopwatch counter select logic means connected between said stopwatch control logic means and said second counting means for controlling the starting, stopping and resetting of said interval timing information; a seven-segment decoder connected between said watch control logic, stopwatch control logic, first and second counting means and said display devices for converting the inputed coded information into seven-segment information which is delivered to said display devices.
Claim 2
Dependent Claim
260 words
A resettable interval timer in combination with, but functioning independently from a digital watch which provides horological information comprising: a plurality of push buttons; a crystal oscillator; a first and second divider connected to said oscillator for dividing the pulses from said oscillator; first counting means for providing inputed coded horological information; second counting means for providing inputed coded interval timing information; a plurality of display devices for displaying said horological and said interval timing information; watch control logic means connected to said first divider for multiplexing said horological information to predetermined display device depending upon the sequence in which said push buttons are depressed; stopwatch control logic means connected to said second divider for multiplexing said interval timing information to predetermined display devices depending upon the sequence in which said push buttons are depressed; pulse detection means connected between said push buttons and said watch and stopwatch control logic means for detecting a predetermined number of push button depressions within a predetermined time period; watch counter select logic means connected between said watch control logic means and said first counting means for slewing and advancing said horological information in said first counting means; stopwatch counter select logic means connected between said stopwatch control logic means and said second counting means for controlling the starting, stopping and resetting of said interval timing information; a seven-segment decoder connected between said watch control logic, stopwatch control logic, first and second counting means and said display devices for converting the inputed coded information into seven-segment information which is delivered to said display devices.
Claim 3
Dependent Claim
260 words
A combination timer and time keeping digital watch as recited in claim 1, wherein: said horological information being hours, minutes, seconds, date month, A.M., P.M. and said interval timing information being odd/even hours, minutes, seconds, tenths and hundredths of seconds; when no push buttons are depressed in the watch mode the hours, minutes and seconds information is displayed on said display devices; when said first push button is depressed once within a predetermined time period the month, date and A.M. or P.M. information is displayed on said display devices; when said first push button is depressed three times within a predetermined time period the hours, minutes and date information is displayed on said display devices instead of hours, minutes, seconds; when said second push button is depressed three times within a predetermined time period said display devices display the interval timing information; simultaneous depression of said first and second push buttons causes said display devices to be reset to all zeros when in said stopwatch mode; depression of said first push button after three depressions of the second push button causes the interval timer to begin to count, a subsequent depression of said second push button causes the interval timing information to be frozen on said display devices, still a subsequent depression of said second push button within a predetermined time period from said second depression causes said display devices to display the advancing interval timing information; depression of said first push putton will cause the interval timer to stop counting and display the current state of the interval timer.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |