Signal-operated marking device

Details Signal-operated marking device Signal-operated marking device

1977-07-15

1979-08-21

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

Printing, dotting, or punching marker

178 96, 346143, 401 88, G01D 1516

Patent

active

041655133

ABSTRACT:
A marking device includes a case which may be held by a user in the fashion of conventional writing and marking instruments. A ball point pen, felt tip pen, pencil or crayon is positioned within the case. In the instances of the pens, a soft iron collar is fixed or adjustably connected to the pen. In the instances of the pencil or crayon, a movable, hollow, soft iron collar is positioned about the pencil or crayon, a plurality of balls of non-magnetic, non-magnetizable material are provided within the collar to hold the pencil or crayon in fixed, preferably adjustable, position when the collar is moved downwardly. An electro-magnet or solenoid responsive to electrical signals or pulses is placed in the vicinity of the fixed or movable soft iron collar.

REFERENCES:
patent: 1399429 (1921-12-01), Hulit
patent: 1550048 (1925-08-01), Ruben
patent: 1656338 (1928-01-01), Ranger
patent: 2891107 (1959-06-01), Weingart
patent: 3707002 (1972-12-01), Howell
patent: 4015269 (1977-03-01), Edo
patent: 4095906 (1978-06-01), Sackett

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