Light pen

Details Light pen Light pen

2008-01-11

2011-11-29

Sawhney, Hargobind S (Department: 2885)

Illumination

With implement or hand held holder therefor

Pen or pencil

C362S579000, C345S180000, C345S183000

Reexamination Certificate

active

08066397

ABSTRACT:
First and second magnets of a light pen according to the present invention are used for replacing a conventional spring to be a switch structure of the light pen. Whereby, the elastic fatigue problem is not yielded, the switch structure is enabled to be more durable and dependable and can be used as a switch structure for a light pen whose stroke between two electric contact points from a separation state to a contact state is shorter.

REFERENCES:
patent: 3749932 (1973-07-01), Jones
patent: 4263592 (1981-04-01), Takahashi et al.
patent: 4677428 (1987-06-01), Bartholow
patent: 6265984 (2001-07-01), Molinaroli
patent: 6572019 (2003-06-01), Rando et al.
patent: 7239306 (2007-07-01), Fahraeus et al.

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