Damping means for drawing heads

Details Damping means for drawing heads Damping means for drawing heads

1981-07-13

1984-10-23

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

Printing, dotting, or punching marker

346139C, G01D 1520

Patent

active

044791372

ABSTRACT:
The invention relates to a damping means particularly for drawing heads for use in map-plotting and the like. The vertical movement of a drawing instrument of the drawing head is controlled by a first electro-magnet. The downward movement of the drawing instrument is arrested by a stop provided at a lever held by a second electromagnet so that the drawing instrument is at an intermediate position spaced from a drawing plane by a small distance. The remaining distance is passed after a definite delay in that the lever is released by said second electromagnet so that the instrument contacts the drawing plane without any bouncing on and damage to said plane.

REFERENCES:
patent: 4054883 (1977-10-01), Ozone
patent: 4157552 (1979-06-01), Nakajima
patent: 4295146 (1981-10-01), Cordes

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