Astronomical time clocks
Patent 5457663 Issued on October 10, 1995. Estimated Expiration Date: 
December 10, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 10, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 164862 filed on 12/10/1993US Classes:368/15, ASTRONOMICAL368/23, With a world globe368/28, WITH CALENDAR INDICATOR368/29, Electro-optical368/82, With electro-optical displayD21/350SimulativeExaminersPrimary: Miska, Vit W.Attorney, Agent or FirmInternational ClassesG04B 019/26G04B 019/22 G04B 019/24 AbstractAn astronomical time clock has a clock face divided into twelve segments representing the months of the year and a centrally positioned light which represents the sun. A globe representing the Earth rotates by a drive means around the light and is positioned in the segment representing the current month. The time of the day may be displayed by conventional clock hands or a digital display which is made clearly visible only in the segment corresponding to the current month. In a preferred embodiment, the globe rotates on its axis representing night and day and may be provided with tilt representing the seasons of the year.Field of SearchASTRONOMICALWith moon and earth display With navigational display With sun and earth display With tide display PLURAL TIME ZONES With sun, earth, and moon display With a world globe WITH CALENDAR INDICATOR Electro-optical Liquid crystal display (i.e., LCD) With electro-optical display DISPLAYS OR DISPLAY DEVICE DETAILS Dial or hand Optical | |
