Tidal clock

A tidal clock comprising a clock face and a clock mechanism comprising a spindle located in the face and driven by the clock mechanism and rotatable hands mounted on the spindle to provide a time display;

• the tidal display mechanism comprising a background, a plurality of laminar members overlying the background, each of the plurality of laminar members representing sea and having an upper edge configured to represent a sea level;
• wherein each laminar member is independently movable between respective lower and upper positions of such laminar member to represent rise and fall of the sea level;
• a plurality of symbolic display members each mounted on a respective support, each support being engaged with the background, permitting movement between lower and upper positions of such support, further engaging a respective laminar member and arranged so that the support and display member mounted thereon is urged to move between the lower and upper positions of the support by the corresponding movement of the laminar member;
• a tidal drive arrangement comprising a drive mechanism and a drive shaft having a plurality of eccentric cams, each eccentric cam engaging a follower connected to a respective laminar member so that rotation of the drive shaft causes movement of the laminar members between the lower and upper positions of the respective laminar members;
• wherein the tidal drive arrangement includes an actuator and a sensor, one of the actuator and sensor being engaged to rotate with the drive shaft and the other of the actuator and sensor being at a fixed location, arranged so that the actuator engages the sensor to generate a signal at a predetermined angular orientation of the drive shaft;
• the drive mechanism comprising a controller, motor and power supply;
• the controller being arranged to control the motor to regulate rotation of the drive shaft and responsive to said signal to reset the drive shaft to the predetermined angular orientation.