Time piece provided with a day/night display and day/night display
US8891337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2013 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Sep 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital day/night display device includes an hour disc provided with ciphers 1-12 representing the hours, and made such that light can pass either through the ciphers or through parts of the hours disc surrounding these ciphers; a rotative day/night disc located under the hours disc including a first zone and a second zone of different colors or shadings; and a mechanism for driving in rotation the hours disc and the day/night disc. The zones extend under the ciphers of the hours disc. Also provided are elements for driving the hours disc in a continuous way and at a constant speed at the rate of two revolutions in twenty-four hours and other elements for driving in a continuous way but intermittently the day/night disc at a rate of one revolution in twenty-four hours. A time piece provided with this digital day/night display device is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.