US3757510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency electronic watch with low power dissipation
Assignee: Raytheon Co
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Filing: 1972-07-03
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Granted: 1973-09-11
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Expires: 1992-07-03
Abstract
Abstract An extremely thin and small electronic watch made possible by a crystal oscillating in the megahertz range and coupled to the display of the watch through two frequency dividers having basically different characteristics.
Inventors
- 👤 H Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
G; G04; G04G; G04G3/00; G04G3/02; G04F; G04F5/00; G04F5/04; G04F5/06; G04F5/063; G04G17/00; G04G17/02; G04G17/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
An electronic watch comprising in combination: a. a quartz crystal-controlled oscillator operating at a frequency above one Mhz, and including 1. a quartz crystal and 2. a first integrated circuit chip formed of silicon-on-saphire and having therein the circuit componentS of said oscillator connected to said crystal and a frequency divider, connected to said oscillator circuit to frequency divide its output by a first factor; c. a second integrated circuit chip formed of silicon and having an inherently lower leakage current but inherently higher nodal capacitance than said first chip, said second chip including a second frequency divider connected to frequency divide the output of said first frequency divider by a second factor which is substantially greater than said first factor; d. a display device; and e. means for driving said display device in response to the output of said second frequency divider.
Claim 2
Dependent Claim
143 words
An electronic watch comprising in combination: a. a quartz crystal-controlled oscillator operating at a frequency above one Mhz, and including 1. a quartz crystal and 2. a first integrated circuit chip formed of silicon-on-saphire and having therein the circuit componentS of said oscillator connected to said crystal and a frequency divider, connected to said oscillator circuit to frequency divide its output by a first factor; c. a second integrated circuit chip formed of silicon and having an inherently lower leakage current but inherently higher nodal capacitance than said first chip, said second chip including a second frequency divider connected to frequency divide the output of said first frequency divider by a second factor which is substantially greater than said first factor; d. a display device; and e. means for driving said display device in response to the output of said second frequency divider.
Claim 3
Dependent Claim
117 words
a first integrated circuit chip formed of silicon-on-saphire and having therein the circuit componentS of said oscillator connected to said crystal and a frequency divider, connected to said oscillator circuit to frequency divide its output by a first factor; c. a second integrated circuit chip formed of silicon and having an inherently lower leakage current but inherently higher nodal capacitance than said first chip, said second chip including a second frequency divider connected to frequency divide the output of said first frequency divider by a second factor which is substantially greater than said first factor; d. a display device; and e. means for driving said display device in response to the output of said second frequency divider.
Claim 4
Dependent Claim
117 words
a first integrated circuit chip formed of silicon-on-saphire and having therein the circuit componentS of said oscillator connected to said crystal and a frequency divider, connected to said oscillator circuit to frequency divide its output by a first factor; c. a second integrated circuit chip formed of silicon and having an inherently lower leakage current but inherently higher nodal capacitance than said first chip, said second chip including a second frequency divider connected to frequency divide the output of said first frequency divider by a second factor which is substantially greater than said first factor; d. a display device; and e. means for driving said display device in response to the output of said second frequency divider.
Claim 5
Dependent Claim
112 words
In an electronic watch the combination comprising: a. an insulating base panel; b. an electrically conductive pedestal extending from a surface of said base panel; c. a rectangular, DT cut quartz crystal mounted on said base panel parallel to the surface of said panel, with the center of the crystal resting upon said pedestal for both electrical contact and mechanical support; and d. at least one integrated circuit chip mounted on said base panel, said chip including elements connected to said crystal and to each other to form an oscillator circuit and also including additional elements interconnected to form a frequency-dividing circuit connected to frequency divide the output of said oscillator circuit.
Claim 6
Dependent Claim
112 words
In an electronic watch the combination comprising: a. an insulating base panel; b. an electrically conductive pedestal extending from a surface of said base panel; c. a rectangular, DT cut quartz crystal mounted on said base panel parallel to the surface of said panel, with the center of the crystal resting upon said pedestal for both electrical contact and mechanical support; and d. at least one integrated circuit chip mounted on said base panel, said chip including elements connected to said crystal and to each other to form an oscillator circuit and also including additional elements interconnected to form a frequency-dividing circuit connected to frequency divide the output of said oscillator circuit.
Claim 7
Dependent Claim
46 words
The combination of claim 2 characterized further by the provision of an electrically conductive holder for said crystal, said holder making both electrical and mechanical contact with a face of said crystal in exact alignment with said pedestal, and being mechanically anchored upon said panel surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |