Mechanical pencil having collet guide

Details Mechanical pencil having collet guide Mechanical pencil having collet guide

1977-10-18

1980-10-28

Bratlie, Steven A.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

401 67, 401 87, 401 93, 401 94, B43K 2116, B43K 2122

Patent

active

042304130

ABSTRACT:
A mechanical pencil of the type in which a lead is gripped in a collet clamped about the lead by engagement between cooperating conical faces of a clamping ring and respective movable ends of two elongated collet members which form the collet and pass through the ring. The collet members are connected together at their other ends. The pencil is readily disassembled and assembled because the movable ends, when in the clamping position, are shaped to interfit with the bore of the ring, so as to permit passage of the collet through the ring in one angular position of the collet relative to the ring while preventing such passage except for limited axial movement in another angular position. Cooperating guide elements on the collet and ring hold the collet in the another angular position. A tubular closure member is releasably fastened to the barrel, and in the another position the collet can be axially displaced relative to the ring when the closure member is released.

REFERENCES:
patent: 2427648 (1947-09-01), Farrington
patent: 2525229 (1950-10-01), Lynn
patent: 3088439 (1963-05-01), Van Dersal
patent: 3350119 (1967-10-01), Friedenreich et al.
patent: 3424535 (1969-01-01), Schischkow
patent: 3537799 (1970-11-01), Sakamoto
patent: 3765781 (1973-10-01), Hashimoto et al.
patent: 3813175 (1974-05-01), Katz
patent: 3836264 (1974-09-01), Saito et al.
patent: 3922098 (1975-11-01), Katz

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