Writing instrument for automatic advancement and feed of leads

Details Writing instrument for automatic advancement and feed of leads Writing instrument for automatic advancement and feed of leads

1982-04-20

1984-12-25

Bratlie, Steven A.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to limit tool projection

401 65, 401 67, 401 94, B43K 2102

Patent

active

044900619

ABSTRACT:
A writing instrument with automatic advancement and feed of successive leads has a housing having a tip part, a lead protecting pipe having an axis and movable in an axial direction, a lead container spaced from the lead protecting pipe in the axial direction, a gripping sleeve extending between the lead container and the lead protecting pipe, a lead clamping member having a plurality of clamping arms and movable between open and closed positions in the axial direction, wherein the clamping arms of said lead clamping member are arranged to abut against the gripping sleeve under a spring action and having a clamping opening with a receiving portion, and the lead clamping member has a shaft connected with said clamping arms with a region adjacent to the latter, and a tilting member provided in the region of the shaft of the clamping member and arranged so that during movement of the lead protecting pipe to the tip part of the housing the tilting member displaces on the shaft of the clamping member, and during movement of the lead protecting pipe in an opposite direction out of the tip part of the housing the tilting member becomes firmly connected with the shaft of the clamping member.

REFERENCES:
patent: 1447677 (1923-03-01), Lindberg
patent: 1729786 (1929-10-01), Lindberg
patent: 1729791 (1929-10-01), Morris
patent: 4180339 (1979-12-01), Katz

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