US3795098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time correction device for digital indication electronic watch
Assignee: Individual
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Filing: 1971-12-02
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Granted: 1974-03-05
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Expires: 1991-12-02
Abstract
Abstract A digital indication electronic wristwatch having a liquid crystal display panel driven by the output of a standard oscillator through frequency divider circuitry. Time regulation is provided by means of a first switch for resetting the entire frequency dividing circuit and a second switch for individually resetting that portion of the frequency divider circuit whose output corresponds to a 1-second or 1-minute signal. If desired, further swiches may be provided for individually resetting those portions of the frequency divider circuit whose output corresponds respectively to the 10-second, 10-minute or 1-hour signal.
Inventors
- 👤 K Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:21
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04G9/12; G04F; G04F10/00; G04F10/04; G04G3/00; G04G3/02; G04G5/00; G04G5/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
A digital indication electronic wristwatch comprising standard high frequency oscillator means; multi-stepped frequency divider circuit means coupled to said oscillator means for dividing the frequency output thereof into time indication signals, including 1-second, 10-second, 1-minute, 10-minute, and 1-hour signals; liquid crystal display means adapted for the digital display of time; means for applying said time indication signals to said liquid crystal display means for driving said display means; and time regulation means including resetting switch means coupled to said frequency divider circuit means for resetting said frequency divider circuit means to a zero to each of the steps of said frequency divider circuit means producing said 1-second, 10-second, 1-minute, 10-minute, and 1-hour signals for separately correcting each of said steps without affecting the higher frequency steps by increasing the count in each of said divider circuit steps by one unit upon each manual operation of the respective said single switches.
Claim 2
Dependent Claim
150 words
A digital indication electronic wristwatch comprising standard high frequency oscillator means; multi-stepped frequency divider circuit means coupled to said oscillator means for dividing the frequency output thereof into time indication signals, including 1-second, 10-second, 1-minute, 10-minute, and 1-hour signals; liquid crystal display means adapted for the digital display of time; means for applying said time indication signals to said liquid crystal display means for driving said display means; and time regulation means including resetting switch means coupled to said frequency divider circuit means for resetting said frequency divider circuit means to a zero to each of the steps of said frequency divider circuit means producing said 1-second, 10-second, 1-minute, 10-minute, and 1-hour signals for separately correcting each of said steps without affecting the higher frequency steps by increasing the count in each of said divider circuit steps by one unit upon each manual operation of the respective said single switches.
Claim 3
Dependent Claim
87 words
A digital indication electronic wristwatch as recited in claim 3, wherein said steps of said frequency divider circuit means are connected in series, and including; capacitor means connected to the output of the step in advance of each step to be individually reset, each said single switches being connected between a high potential and a point in said series connection intermediate said capacitor means and each step to be corrected; and resistor means connected between a low potential and each of said points in said series connection.
Claim 4
Dependent Claim
250 words
A digital indication electronic wristwaTch comprising standard high frequency oscillator means: multi-stepped frequency divider circuit means coupled to said oscillator means for dividing the frequency output thereof into time indication signals, including 1-second, 10-second, 1-minute, 10-minute, and 1-hour signals; liquid crystal display means adapted for the digital display of time; means for applying said time indication signals to said liquid crystal display means for driving said display means; and time regulation means including resetting switch means coupled to said frequency divider circuit means for resetting said frequency divider circuit means to a zero condition as a unit; and a plurality of single switch means, each including a single manually operable switch, one of said single means being coupled to each of the steps of said frequency divider circuit means producing said 1-minute, 10-minute, and 1-hour signals for individually correcting each of said steps without affecting the higher frequency steps by increasing the count in each of said divider circuits steps by one unit upon each manual operation of the respective said single switches, wherein said steps of said frequency divider circuit means being connected in series, and including; capacitor means connected to the output of the step in advance of each step to be individually reset, each said single switch being connected between a high potential and a point in said series connection intermediate said capacitor means and each step to be corrected; and resistor means connected between a low potential and each of said points in said series connection.
Claim 5
Dependent Claim
250 words
A digital indication electronic wristwaTch comprising standard high frequency oscillator means: multi-stepped frequency divider circuit means coupled to said oscillator means for dividing the frequency output thereof into time indication signals, including 1-second, 10-second, 1-minute, 10-minute, and 1-hour signals; liquid crystal display means adapted for the digital display of time; means for applying said time indication signals to said liquid crystal display means for driving said display means; and time regulation means including resetting switch means coupled to said frequency divider circuit means for resetting said frequency divider circuit means to a zero condition as a unit; and a plurality of single switch means, each including a single manually operable switch, one of said single means being coupled to each of the steps of said frequency divider circuit means producing said 1-minute, 10-minute, and 1-hour signals for individually correcting each of said steps without affecting the higher frequency steps by increasing the count in each of said divider circuits steps by one unit upon each manual operation of the respective said single switches, wherein said steps of said frequency divider circuit means being connected in series, and including; capacitor means connected to the output of the step in advance of each step to be individually reset, each said single switch being connected between a high potential and a point in said series connection intermediate said capacitor means and each step to be corrected; and resistor means connected between a low potential and each of said points in said series connection.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |