Abstract: An electric sharpener has a casing, an electric motor, and a flat cutting blade for turning by the motor. There is an aperture in the casing through which a pencil can be inserted for sharpening by the cutting blade. An activation sensor is included for detecting when a pencil has been inserted through the aperture to close the electrical circuit, and a deactivation sensor for detecting a sharpened tip of the pencil to open the electrical circuit, thereby stopping the motor. The deactivation sensor has an actuating part for engagement and movement by the tip and a contact part supported by the actuating part for concurrent movement to break electrical contact with a fixed contact in the electrical circuit.

Abstract: An electric pencil sharpener includes a casing, an electric motor located within the casing and a rotating blade driven to rotate by the electric motor. There is an aperture in the casing through which a pencil can be inserted for engagement with the blade. An activation sensor detects when a pencil has been inserted through the aperture and closes a circuit to drive the electric motor, and a deactivation sensor detects a sharpened tip of a pencil and opens the circuit to stop the motor.

Abstract: An electric sharpener has a casing, an electric motor, and a flat cutting blade for turning by the motor. There is an aperture in the casing through which a pencil can be inserted for sharpening by the cutting blade. An activation sensor is included for detecting when a pencil has been inserted through the aperture to close the electrical circuit, and a deactivation sensor for detecting a sharpened tip of the pencil to open the electrical circuit, thereby stopping the motor. The deactivation sensor has an actuating part for engagement and movement by the tip and a contact part supported by the actuating part for concurrent movement to break electrical contact with a fixed contact in the electrical circuit.