Tide clock device

Details Tide clock device Tide clock device

1988-05-24

1989-07-18

Roskoski, Bernard

Horology: time measuring systems or devices

Astronomical

With tide display

G04B 1926

Patent

active

048499498

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.

REFERENCES:
patent: 3703804 (1972-11-01), Appelberg
patent: 4623259 (1986-11-01), Oberst

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