US3823550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state watch display switch
Assignee: TIME COMPUTER
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Filing: 1973-04-25
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Granted: 1974-07-16
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Expires: 1993-04-25
Abstract
Abstract Disclosed is a solid state wristwatch with an electro-optical digital display of light-emitting diodes. Incorporated in the watch is a switch for actuating the display in response to a predetermined movement of the wearer''s arm so that movement of the other hand or arm is not required and the other hand is left free for carrying packages or other uses.
Inventors
- 👤 J Bergey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:03
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04G9/10; G04G9/107; G04C; G04C3/00; G04C3/001; G04C3/002; Y; Y10; Y10S; Y10S362/00; Y10S362/80
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A wristwatch comprising a frequency standard for producing substantially constant frequency electrical signals, a frequency converter coupled to said frequency standard for producing corresponding electrical signals of lower frequency than said frequency standard, an electro-optical time display for displaying time in decimal numbers, a display actuator coupling said frequency converter to said electro-optical time display, an electrical power supply terminal for energizing said time display from a power supply, and a single pole double-throw inertial switch coupling said power supply terminal to said display, said switch comprising a sleeve, a movable electrical conductor in said sleeve, first and second electrical contacts adjacent opposite ends of said sleeve, and a delay circuit coupled to said contacts whereby said electrical conductor must engage both of said contacts within a predetermined time to operate said switch.
Claim 2
Dependent Claim
133 words
A wristwatch comprising a frequency standard for producing substantially constant frequency electrical signals, a frequency converter coupled to said frequency standard for producing corresponding electrical signals of lower frequency than said frequency standard, an electro-optical time display for displaying time in decimal numbers, a display actuator coupling said frequency converter to said electro-optical time display, an electrical power supply terminal for energizing said time display from a power supply, and a single pole double-throw inertial switch coupling said power supply terminal to said display, said switch comprising a sleeve, a movable electrical conductor in said sleeve, first and second electrical contacts adjacent opposite ends of said sleeve, and a delay circuit coupled to said contacts whereby said electrical conductor must engage both of said contacts within a predetermined time to operate said switch.
Claim 3
Dependent Claim
16 words
A wristwatch according to claim 1 wherein said movable electrical conductor comprises a drop of mercury.
Claim 4
Dependent Claim
19 words
A wristwatch according to claim 1 wherein said delay circuit includes active elements formed from complementary symmetry MOS transistors.
Claim 5
Dependent Claim
14 words
A wristwatch according to claim 1 wherein said delay circuit is a digital circuit.
Claim 6
Dependent Claim
14 words
A wristwatch according to claim 4 wherein said delay circuit comprises a binary divider.
Claim 7
Dependent Claim
17 words
A wristwatch according to claim 1 wherein said delay circuit comprises a leading edge triggered monostable multivibrator.
Claim 8
Dependent Claim
16 words
A wristwatch according to claim 1 wherein said delay circuit comprises a falling edge monostable multivibrator.
References Cited (Backward Citations)
US3672155A
Cited
US3729923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |