TL;DR: In this article, the authors present a nautical clock consisting of both the moon clock and the tide clock, which is used to indicate a phase of the moon at a given time and for marking a division of the continuous scale.
Abstract: A moon clock for indicating a phase of the moon. The moon clock comprises a moon disk rotatable about a central axis having moon representation means and a continuous scale disposed on the front surface thereof, drive means for rotating the moon disk at a rate corresponding to the rate of the lunar orbit, marker means for marking a position of the moon representation means that indicates a phase of the moon at a given time and for marking a division of the continuous scale, and a stationary vernier scale positioned adjacent to the continuous scale for measuring a fractional part of the division of the continuous scale marked by the marker means. Also provided is a tide clock for indicating a state of the tide. The tide clock comprises a tide disk rotatable about a central axis having tide representation means for representing a high tide disposed on the front surface thereof, marker means for marking a position of the tide representation means that indicates the time of the high tide and drive means for rotating the tide disk at a rate of approximately one revolution every 12 hours and 25 minutes. Also provided is a nautical clock comprising both the moon clock and the tide clock. The moon clock of the nautical clock is particularly useful in setting the tide clock.
TL;DR: In this article, a tide clock is used to display tide conditions cycling between low and high tides based on an average cycle time, and the size of the visible portion of the shaded area reflects tide status.
Abstract: A 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.
TL;DR: A tide clock that utilizes global positioning system data to calculate tidal events is presented in this article, which includes a receiver that receives global positioning data describing the clock's position, and a memory having algorithms selectable to calculate the time of a tidal event for multiple locations.
Abstract: A tide clock that utilizes global positioning system data to calculate tidal events. The tide clock includes a receiver that receives global positioning data describing the clock's position, and a memory having algorithms selectable to calculate the time of a tidal event for multiple locations.
TL;DR: In this paper, a programmable electronic timing device includes two sets of counter circuits that count minutes, hours, and twelve hour intervals, which feed time data into a time or tide data selector circuit under control of an oscillator circuit to alternately operate a display driver circuit that drives a display.
Abstract: According to the present invention, a programmable electronic timing device includes two sets of counter circuits that count minutes, hours, and twelve hour intervals. Both sets of counter circuits feed time data into a time or tide data selector circuit under control of an oscillator circuit to alternately operate a display driver circuit that drives a display means to display real time and then when the next high or low tide is to occur. One of the sets of counter circuits advances the time to the next time that high or low tide is to occur, and, when the high or low tide has been reached, the next high or low tide will be displayed alternately along with the real time. According to another aspect of the present invention, colored lights indicate whether the tide that is being indicated to occur will be high or low tide. According to a further aspect of the present invention, additional time will be added when the eighth tide indication takes place to compensate for the fractional times that the previously high or low tides were indicated to have occured.
TL;DR: In this article, a first tide wheel is fixed to the hour hand tube of a conventional clock movement, below the fit-up cover, and a second tide wheel on a tide wheel bushing rotatably carries the tide hand on the bushing so that it can be slip for setting to correct indication.
Abstract: A first tide wheel is fixed to the hour hand tube of a conventional clock movement, below the fit-up cover A first idler pinion fixed to a shaft journalled in the fit-up cover engages the first tide wheel The pinion shaft has a second idler pinion above the fit-up cover, which engages a second tide wheel on a tide wheel bushing rotatably carried on the hour hand tube The tide hand is frictionally carried on the tide wheel bushing so that it can be slipped for setting to correct indication A dial is provided, on which the tide hand indicates the hours to or from high tide, low tide and mid tide