Electrically operated marine speedometer-odometer

Claim 1

IN COMBINATION A BOAT HAVING AN OPENING THROUGH THE HULL THEREOF, A HOLLOW TUBE EXTENDING THROUGH THE OPENING IN THE HULL OF THE BOAT HAVING AN ANNULAR GROOVE AROUND THE ONE END THEREOF EXTERNAL OF THE BOAT HULL, A SHIP''S LOG COMPRISING AN ELONGATED HOLLOW CYLINDER HAVING ANGULARLY SPACED APART FINS ON THE EXTERIOR THEREOF FOR PRODUCING ROTATION OF THE CYLINDER IN USE, SAID CYLINDER ALSO HAVING THREE SEPARATE PROGRESSIVELY LARGER INTERNAL DIAMETERS FORMING ANNULAR ABUTMENTS THEREBETWEEN, SAID HOLLOW TUBE EXTENDING THROUGH THE LARGER AND INTO THE INTERMEDIATE DIAMETER PORTION OF THE CYLINDER, A SNAP RING POSITIONED WITHIN THE PORTION OF THE CYLINDER HAVING THE LARGER DIAMETER ABUTTING THE ANNULAR ABUTMENT FORMED BETWEEEN THE INTERMEDIATE AND LARGER DIAMETER PORTIONS OF THE CYLINDER AND RETAINED IN THE ANNULAR GROOVE AROUND THE ONE END OF THE TUBE, A BUSHING POSITIONED IN THE LARGER DIAMETER PORTION OF THE CYLINDER ABUTTING THE SNAP RING, A SLEEVE ALSO POSITIONED IN THE LARGER DIAMETER PORTION OF THE CYLINDER ABUTTING THE BUSHING AND MEANS SECURING THE SLEEVE TO THE CYLINDER WHEREBY THE SHIP''S LOG IS SECURED TO THE ONE END OF THE TUBE EXTERIOR OF THE BOAT, GUARD MEANS SECURED TO THE BOAT HULL SURROUNDING THE SHIP''S LOG AND ONE END OF THE TUBE, A SOURCE OF ELECTRIC ENERGY, A GENERATOR OPERABLE IN CONJUNCTION WITH THE SHIP''S LOG AND THE SOURCE OF ELECTRIC ENERGY FOR PRODUCING AN ELECTRIC SIGNAL PROPORTIONAL TO THE SPEED OF ROTATION OF THE SHIP''S LOG SECURED TO THE OTHER END OF THE TUBE INSIDE THE BOAT HULL, A FLEXIBLE CABLE EXTENDING BETWEEN AND CONNECTED AT OPPOSITE ENDS TO THE SHIP''S LOG AND THE GENERATOR, MEANS FOR SECURING THE END OF THE FLEXIBLE CABLE CONNECTED TO THE SHIP''S LOG IN THE PORTION OF THE CYLINDER HAVING THE SMALLER DIAMETER, AN ELECTRIC SPEEDOMETER AND ODOMETER CONNECTED TO THE GENERATOR THROUGH A PAIR OF CONDUCTORS AND TO ONE TERMINAL OF THE SOURCE OF ELECTRIC ENERGY THROUGH A THIRD CONDUCTOR, A FOURTH CONDUCTOR EXTENDING BETWEEN THE GENERATOR AND THE SOURCE OF ELECTRIC ENERGY AND A SWITCH IN SAID FOURTH CONDUCTOR FOR SELECTIVELY DEENERGIZING THE GENERATOR, SPEEDOMETER AND ODOMETER.