Writing unit locking mechanism in a multiple-point writing imple

Details Writing unit locking mechanism in a multiple-point writing imple Writing unit locking mechanism in a multiple-point writing imple

1977-08-12

1979-04-10

Coven, Edward M.

Coating implements with material supply

Plural tools including projectable and retractable tool

Selective individual projection by single actuator

401 17, B43K 2712

Patent

active

041485912

ABSTRACT:
A writing unit locking mechanism in a writing implement having a mechanical pencil unit and a ball point pen unit both housed in a single holder cylinder. The locking mechanism has a writing unit selection member having a shift member shiftable under gravitational force to select one or the other writing unit and operated manually to actuate a chuck in the pencil unit and a catch shoulder provided on a unit cylinder of the pencil unit and adapted to engage directly with the holder cylinder or with an engagement member resiliently supported on the holder cylinder thereby to lock the pencil unit in its writing position. The pencil unit is released from its locked state simultaneously with the release of the selection member.

REFERENCES:
patent: 2505267 (1950-04-01), Weber
patent: 2882859 (1959-04-01), Poritz
patent: 3152578 (1964-10-01), Hofmann
patent: 3174462 (1965-03-01), Bross
patent: 4022535 (1977-05-01), Ritter

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