Electric pencil sharpener

Details Electric pencil sharpener Electric pencil sharpener

2007-09-25

2007-09-25

Ashley, Boyer D. (Department: 3724)

Woodworking

Special-work machine

Pencil sharpening

C144S028600, C144S028720

Reexamination Certificate

active

11340569

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.

REFERENCES:
patent: 2561438 (1951-07-01), Duchesneau
patent: 2822781 (1958-02-01), Burton
patent: 3134365 (1964-05-01), Hori
patent: 3486540 (1969-12-01), Hori
patent: 3650308 (1972-03-01), Hori
patent: 3678975 (1972-07-01), Imanishi et al.
patent: 3746061 (1973-07-01), Nakazaki
patent: 3777791 (1973-12-01), Uchida
patent: 4050487 (1977-09-01), Mabuchi et al.
patent: 4601316 (1986-07-01), Verdi
patent: 4815507 (1989-03-01), O'Rourke
patent: 5052453 (1991-10-01), Chen
patent: 5161587 (1992-11-01), Wu
patent: 6249981 (2001-06-01), Shu
patent: 7134461 (2006-11-01), Takada
patent: 2004/0016476 (2004-01-01), Lamers et al.
patent: 2006/0086416 (2006-04-01), Takada

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