US3914932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timepiece
Assignee: Suwa Seikosha KK
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Filing: 1974-05-16
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Granted: 1975-10-28
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Expires: 1994-05-16
Abstract
Abstract An electronic timepiece is provided wherein the time is displayed on a transmissive ceramic material by electrically transforming the signal from a standard signal source such as a crystal oscillator. The display is characterized by a driving circuit secured to a surface which is opposite the surface to which the transmissive ceramic material is secured.
Inventors
- 👤 Katsuhiro Teraishi
- 👤 Akihiko Kouchi
- 👤 Hiroshi Takeshita
- 👤 Michio Asahina
- 👤 Kunihiro Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:13
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0023; G04G9/0029; G04G9/0035; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/055; G02F1/0551; G04G17/00; G04G17/02; G04G17/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A display assembly for an electronic timepiece including a display cell comprising a transparent resin casing, a transmissive ceramic plate embedded in said casing, electrodes mounted on said transmissive ceramic plate for displaying a time setting, a conductive frame engaging said transmissive ceramic plate, said conductive frame having an inner portion embedded in said casing and an outer portion extending outside said casing, said conductive frame comprising respective parallel pluralities of discrete terminal tags, each terminal tag being conductively connected to an electrode, a linear polarizing plate embedded in said casing in overlying parallel relationship relative to said transmissive ceramic plate, and a light reflective plate embedded in said casing in underlying parallel relationship relative to said transmissive ceramic plate.
Claim 2
Dependent Claim
120 words
A display assembly for an electronic timepiece including a display cell comprising a transparent resin casing, a transmissive ceramic plate embedded in said casing, electrodes mounted on said transmissive ceramic plate for displaying a time setting, a conductive frame engaging said transmissive ceramic plate, said conductive frame having an inner portion embedded in said casing and an outer portion extending outside said casing, said conductive frame comprising respective parallel pluralities of discrete terminal tags, each terminal tag being conductively connected to an electrode, a linear polarizing plate embedded in said casing in overlying parallel relationship relative to said transmissive ceramic plate, and a light reflective plate embedded in said casing in underlying parallel relationship relative to said transmissive ceramic plate.
Claim 3
Dependent Claim
90 words
The display assembly as claimed in claim 1 including a dial disc supporting said display cell, said dial disc having an upper and a lower surface, and being provided with a plurality of through-holes, said display cell being mounted on said upper surface of said dial disc, a driving circuit for said electronic timepiece being mounted on said lower surface of said dial disc, and a plurality of print wires for connecting said driving circuit to said respective pluralities of terminal tags through said through-holes provided in said dial disc.
Claim 4
Dependent Claim
39 words
The display assembly as claimed in claim 1 wherein said inner portion of said conductive frame which is embedded in said casing is raised relative to said outer portion of said conductive frame which is free of said casing.
Claim 5
Dependent Claim
26 words
The display assembly as claimed in claim 1 wherein said transmissive ceramic plate consists essentially of an admixture of lanthanum oxide, lead titanate and lead zirconate.
Claim 6
Dependent Claim
24 words
The display assembly as claimed in claim 4 wherein the atomic ratio of zirconium to titanium in the admixture is about 65 to 35.
Claim 7
Dependent Claim
19 words
The display assembly as claimed in claim 4 wherein the admixture includes from about 7 to 10% of lanthanum.
References Cited (Backward Citations)
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |