Mechanical pencil
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United States of America Patent
Stats
-
Aug 19, 1980
Grant Date -
N/A
app pub date -
Mar 30, 1979
filing date -
Apr 1, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanical pencil having first and second rotatable body members and a slider mounted for retractable movement in one of the members. The slider has an axial retainer for frictionally gripping the lead. A lead case is disposed within one body member having a lead gripping chuck connected to one end. A chuck tightening mechanism advances and tightens the chuck to supply lead to the slider having a predetermined length. Rotation of the two body members relative to each other is translated into a corresponding movement to the chuck tightening mechanism. A resilient or magnetic member may be placed in the slider to maintain contact with the tightening mechanism.
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