US4048796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Touch sensitive electrodes formed on the frame of an electronic wristwatch
Assignee: Sharp Corp
•
Filing: 1976-06-30
•
Granted: 1977-09-20
•
Expires: 1996-06-30
Abstract
Abstract An upper metal frame or a bezel and a rear metal frame of an electronic wristwatch are electrically isolated from each other by interposing an insulating frame therebetween. The upper metal frame or the bezel is connected to one input terminal of a touch sensitive electronic switching circuitry disposed in the electronic wristwatch, whereas the rear metal frame is connected to another input terminal of the touch sensitive electronic switching circuitry.
Inventors
- 👤 Takehiko Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:52
CPC Classifications
G; G04; G04G; G04G21/00; G04G21/08; G04G17/00; H; H01; H01H; H01H13/00; H01H13/02; H01H2300/00; H01H2300/016
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
In an electronic timepiece including a front metal casing, a rear metal casing and a touch sensitive electronic switching circuitry, the improvement comprising: an insulating ring for electrically isolating the front metal casing from the rear metal casing; and a connection means for electrically connecting the front metal casing to an input terminal of the touch sensitive electronic switching circuitry.
Claim 2
Dependent Claim
60 words
In an electronic timepiece including a front metal casing, a rear metal casing and a touch sensitive electronic switching circuitry, the improvement comprising: an insulating ring for electrically isolating the front metal casing from the rear metal casing; and a connection means for electrically connecting the front metal casing to an input terminal of the touch sensitive electronic switching circuitry.
Claim 3
Dependent Claim
30 words
The electronic timepiece of claim 1, wherein the insulating ring is interposed between the front metal casing and the rear metal casing, and the insulating ring is made of plastics.
Claim 4
Dependent Claim
115 words
In an electronic timepiece including a front metal casing, a rear metal casing, and an electronic circuitry assembly which includes a touch sensitive electronic switching circuitry of which output signals are used for controlling the operation mode of the electronic timepiece, the touch sensitive electronic switching circuitry having two input terminals, the improvement comprising: an insulating ring for electrically isolating the front metal casing from the rear metal casing; a first connection means for electrically connecting the front metal casing to one input terminal of the touch sensitive electronic switching circuitry; and a second connection means for electrically connecting the rear metal casing to the other input terminal of the touch sensitive electronic switching circuitry.
Claim 5
Dependent Claim
115 words
In an electronic timepiece including a front metal casing, a rear metal casing, and an electronic circuitry assembly which includes a touch sensitive electronic switching circuitry of which output signals are used for controlling the operation mode of the electronic timepiece, the touch sensitive electronic switching circuitry having two input terminals, the improvement comprising: an insulating ring for electrically isolating the front metal casing from the rear metal casing; a first connection means for electrically connecting the front metal casing to one input terminal of the touch sensitive electronic switching circuitry; and a second connection means for electrically connecting the rear metal casing to the other input terminal of the touch sensitive electronic switching circuitry.
Claim 6
Dependent Claim
17 words
The electronic timepiece of claim 3, wherein the touch sensitive electronic switching circuitry comprises a C-MOS inverter.
Claim 7
Dependent Claim
117 words
In an electronic wristwatch including a front glass window, a bezel made of metal for supporting the front glass window, a metal casing, and an electronic circuit assembly including a touch sensitive electronic switching circuitry of which output signals are used for controlling the operation mode of the electronic wristwatch, the touch sensitive electronic switching circuitry having two input terminals, the improvement comprising: an insulating ring interposed between the bezel and the metal casing; a first connection means for electrically connecting the bezel to one input terminal of the touch sensitive electronic switching circuitry; and a second connection means for electrically connecting the metal casing to the other input terminal of the touch sensitive electronic switching circuitry.
Claim 8
Dependent Claim
117 words
In an electronic wristwatch including a front glass window, a bezel made of metal for supporting the front glass window, a metal casing, and an electronic circuit assembly including a touch sensitive electronic switching circuitry of which output signals are used for controlling the operation mode of the electronic wristwatch, the touch sensitive electronic switching circuitry having two input terminals, the improvement comprising: an insulating ring interposed between the bezel and the metal casing; a first connection means for electrically connecting the bezel to one input terminal of the touch sensitive electronic switching circuitry; and a second connection means for electrically connecting the metal casing to the other input terminal of the touch sensitive electronic switching circuitry.
Claim 9
Dependent Claim
17 words
The electronic wristwatch of claim 5, wherein the touch sensitive electronic switching circuitry comprises a C-MOS inverter.
References Cited (Backward Citations)
US3742699A
Cited
US3940920A
Cited
US3838568A
Cited
US3846971A
Cited
US3939643A
Cited
US3911664A
Cited
US3983690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |