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US4175375A
Expired / Lapsed
US
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Electronic watch having improved level setting circuit
Assignee: Toshiba Corp
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Filing: 1977-10-26
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Granted: 1979-11-27
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Expires: 1997-10-26
Abstract
Abstract An electronic watch comprising a level setting circuit which consists of a resistive device and a switching element connected between a switch and a power source. The resistance value of the switching element is much smaller than that of the resistive device and the switching element is rendered non-conductive when the switch is in its on state and is rendered conductive when the switch is in its off state.
Inventors
- 👤 Tsuneo Takase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:15
CPC Classifications
G; G04; G04G; G04G99/00; G04G5/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
An electronic watch comprising: (a) a switch input means, (b) level setting means connected to the switch input means and consisting of a switching element with an input electrode, and resistive means, respectively connected between the switch input means and a power source, and an inverter circuit whose input portion is connected to the switch input means and whose output portion is connected to the input electrode of the switching element, (c) a control circuit connected to the level setting means, (d) a time computer connected to the control circuit for producing a standard clock pulse, and (e) display means connected to receive the output of the time computer for displaying time, said display means being connected to the control circuit, wherein the switching element is arranged closer to the switch input means than the resistive means.
Claim 2
Dependent Claim
137 words
An electronic watch comprising: (a) a switch input means, (b) level setting means connected to the switch input means and consisting of a switching element with an input electrode, and resistive means, respectively connected between the switch input means and a power source, and an inverter circuit whose input portion is connected to the switch input means and whose output portion is connected to the input electrode of the switching element, (c) a control circuit connected to the level setting means, (d) a time computer connected to the control circuit for producing a standard clock pulse, and (e) display means connected to receive the output of the time computer for displaying time, said display means being connected to the control circuit, wherein the switching element is arranged closer to the switch input means than the resistive means.
Claim 3
Dependent Claim
53 words
The electronic watch recited in claim 1 wherein: the resistive value of the switching element is much smaller than that of the resistive means, and the switching element is rendered non-conductive when the switch means is in its on state and is rendered conductive when the switch means is in its off state.
Claim 4
Dependent Claim
15 words
The electronic watch recited in claim 1 wherein: the switching element is a MOS transistor.
Claim 5
Dependent Claim
53 words
The electronic watch recited in claim 1 wherein: the switch input means consists of a first switch for correcting the time and a second switch for displaying the time selectively, and the level setting means consists of a first level setting circuit and a second level setting circuit respectively connected to the switches.
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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |