We claim the ornamental design for a tidal clock, as shown and described.
FIG. 1 is a perspective view of a tidal clock showing a clock face embodying our new design.
FIG. 2 is a front view of the tidal clock showing a clock face in a first tidal state.
FIG. 3 is a front view of the tidal clock showing a clock face in a second tidal state.
FIG. 4 is a front view of the tidal clock showing a clock face in a third tidal state; and,
FIG. 5 is a front view of the tidal clock showing a clock face in a fourth tidal state.
The graphic content shown in broken lines within the window is included for the purpose of illustrating possible tide related imagery that may be displayed within the window but forms no part of the claimed design.
The broken lines in the drawing are for illustrative purposes only and form no part of the claimed design.
The needles on each of the dials on the clock face are independently moveable and several representative settings are shown, however the illustrated positions of the needles are intended to be representative of numerous possible relative needle positions depending on tidal conditions. The four tidal states depicted in FIGS. 2-5 represent different positions indicating different states of the same design.