US3597912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Day-of-the-week indicating mechanism
Assignee: Suwa Seikosha KK
•
Filing: 1969-12-08
•
Granted: 1971-08-10
•
Expires: 1989-12-08
Abstract
Abstract A Days-of-The-Week Indicating Mechanism for a timepiece wherein a day disc is provided, divided into two portions by a boundary line extending along a substantially spiral path along said day disk, each of said day disk portions being of a different color and being transparent or semitransparent. A radially extending window opening is provided in a calendar window of the dial plate, said boundary line being positioned so that the days of the week are indicated by the position of said boundary line in said window.
Inventors
- 👤 Tatsuro Akahano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/20; G04B19/202; G04B19/24; G04B19/243; G04B19/247
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A days-of-the-week indicating mechanism for a timepiece comprising a rotatable day disc formed with two portions defined by a boundary line extending along said day disc in a substantially spiral path, said day disc portions being of different colors and being transparent or semi-transparent, a dial plate positioned in said timepiece over said day disc and formed with a radially-extending calendar opening therethrough, said calendar opening and boundary line being positioned relative to each other so that a portion of said boundary line is visible in said calendar window, the radial position of said portion of said boundary line being representative of the day of the week.
Claim 2
Dependent Claim
107 words
A days-of-the-week indicating mechanism for a timepiece comprising a rotatable day disc formed with two portions defined by a boundary line extending along said day disc in a substantially spiral path, said day disc portions being of different colors and being transparent or semi-transparent, a dial plate positioned in said timepiece over said day disc and formed with a radially-extending calendar opening therethrough, said calendar opening and boundary line being positioned relative to each other so that a portion of said boundary line is visible in said calendar window, the radial position of said portion of said boundary line being representative of the day of the week.
Claim 3
Dependent Claim
44 words
A days-of-the-week indicating mechanism as recited in claim 1, wherein said dial plate bears indicia indicative of the days of the week adjacent said calendar opening and aligned for registration with the various positions of said boundary line as said day disc is rotated.
Claim 4
Dependent Claim
48 words
A days-of-the-week indicating mechanism as recited in claim 1, wherein said substantially spiral boundary line is formed from a plurality of segments, each segment being radially displaced an incremental distance from the next adjacent segments, each of said segments being associated with a different day of the week.
Claim 5
Dependent Claim
59 words
A days-of-the-week indicating mechanism as recited in claim 3, wherein each of said segments of said boundary line defines a substantially pie-shaped region in at least one of said day disc portions, each of said pie-shaped regions being divided by a radially extending boundary line into two parts of different colors to provide an indication of AM and PM.
Claim 6
Dependent Claim
65 words
A days-of-the-week indicating mechanism as recited in claim 1, including a date dial having a plurality of indicia aligned in an annular region thereof, representing the days of the month, said annular region being positioned in registration with said calendar window, said day disc being positioned over said date dial whereby day of the week and date may be displayed through a common calendar window.
References Cited (Backward Citations)
US3226926A
Cited
US3472018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |