Coal Industry (Patents) Limited

John Joseph Wilkinson

Harry Monks

The circuit, which controls actuation of a clutch intermediate an electrical motor and a conveyor, is powered from a transformer which taps the power supply to the motor. The circuit contains a relay switch which is operable by a current sensor attached to the power supply line.

Control means for drive equipment

A transducer for indicating the percentage filling of an underground mine storage bunker. The contents of the bunker is proportional to the rotation of a shaft of a conveyor which feeds it. The transducer comprises a shaft encoder for sensing this rotation and derives a signal indicative thereof. The signal is fed to a circuitry which includes a visual display for a further signal derived in the circuitry which is equal to the first mentioned signal and a bunker full warning light which is energized when the further signal exceeds a preselected value. The circuitry is compatible with a varied range of input signals.

Growing community of inventors

Burton upon Trent, United Kingdom

John Joseph Wilkinson