Lead engaging chuck mechanism for mechanical pencil

Details Lead engaging chuck mechanism for mechanical pencil Lead engaging chuck mechanism for mechanical pencil

1983-10-03

1986-02-18

Apley, Richard J.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

401 53, 401 67, 401 94, B43K 2116

Patent

active

045711054

ABSTRACT:
A chuck mechanism incorporated in a mechanical pencil has a plurality of chuck elements in a longitudinal confronting relation. The chuck elements have a pivotal support or fulcrum at their opposing rearward portions so that the elements are pivotable about the fulcrum. The fulcrum is formed proximal to the rear end and distal to the front end jaw portions of the chuck elements. When an axial force is applied to the chuck elements, the jaw portions of the chuck elements are opened to release lead engagement thereby. The rear portion relative to the fulcrum is a portion where an axially forward thrust added thereto is converted to a radially inward thrust to the rear portion.

REFERENCES:
patent: 275517 (1883-04-01), Pusey
patent: 1633529 (1927-06-01), Hoffmann
patent: 1636704 (1927-07-01), Patten
patent: 1700246 (1929-01-01), Woelm
patent: 1700247 (1929-01-01), Woelm
patent: 1724412 (1929-08-01), Pollack
patent: 1762317 (1930-06-01), Woelm
patent: 2184911 (1939-12-01), Fend
patent: 2210845 (1940-08-01), Wahl

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