Writing instrument with press mechanism and magnetic catch

Details Writing instrument with press mechanism and magnetic catch Writing instrument with press mechanism and magnetic catch

1987-07-24

1988-03-08

Bratlie, Steven A.

Coating implements with material supply

Projectable and retractable tool

Magnetically projected, retracted, or latched

401108, 401112, 401115, B43K 2402, B43K 2408

Patent

active

047296852

ABSTRACT:
In a writing instrument with a pressure mechanism for the movement of a writing element (4, 5, 6, 11, 12, 13) against spring pressure from a retracted position of rest into an advanced writing position, in which retention by means of a retention element (18, 19, 20) takes place, the retention element (18, 19, 20) has a cup section (18) open towards the rear. In this cup section is a ball (23) of magnetizable material which is axially freely movable back and forth in the cup section. Adjacent to the opening of the cup section (18) is a permanent magnet (16), the front face of which forms a concave contact surface (17), disposed coaxially to the writing element (4, 5, 6, 11, 12, 13) for the placement of the ball (23).

REFERENCES:
patent: 2757639 (1955-08-01), Wichmann
patent: 2870741 (1959-01-01), Kersten
patent: 2933067 (1960-04-01), Larson
patent: 4176979 (1979-12-01), Saida
patent: 4352580 (1982-10-01), Ando
patent: 4377349 (1983-03-01), Kunii

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