Tide clock device
Patent 4849949 Issued on July 18, 1989. Estimated Expiration Date: 
May 24, 2008. 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.
May 24, 2008. 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.InventorApplicationNo. 07/198103 filed on 05/24/1988US Classes:368/19, With tide display968/209With indicators for tides [G04B 19/26M]ExaminersPrimary: Roskoski, BernardAttorney, Agent or FirmInternational ClassesG04B 19/00 (20060101)G04B 19/26 (20060101) AbstractA tide clock device is operative to display tide conditions cycling between low and high tides based on an average cycle time. The device includes a clock drive and a pair of relative rotatable elements, one of which is a display element and the other of which is a masking element. The display element has a shaded area and the masking element sequentially covers and uncovers the shaded area, and the size of the visible portion of the shaded area reflects tide status. Indices and indicators are provided to register the time interval before low tide and before high tide. In one form, the masking element is stationary and has a window opening, and the display element is driven so that an eccentric shaded area is driven past the window opening. In another form, the display element is stationary, and the masking element is an eccentric driven in front of the display element to mask and unmask the shaded area. | |
