Title: Display device for varying the shape and cross-section of a rectangular area

Abstract: A display device having a rectangular area of variable shape and cross-section with a pair of movable line markers defining the horizontal boundaries and another pair of movable line markers defining the vertical boundaries, means for moving each pair of line markers to vary the distance therebetween to obtain the rectangular area of desired shape and cross-section. Simultaneous movement and regulated separation of pairs of line markers may be obtained by rotating elliptical cams connected to the line markers.

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Inventors: Kuhn, Hans-Robert (Kiel, DT)

Application Number: 415020
Filing Date: 1973-11-12
Publication_date: 1976-01-27
Assignee: Electroacustic GmbH (Kiel, DT)
Primary Class(es): 40/446
Other Classes:
US Patent Ref:

1813689	Jul, 1931	Weisker	355/74.
1882293	Oct, 1932	Mueller	355/74.
2245527	Jun, 1941	Grabfield	355/75.

Other Refs:
Primary Examiner: Rein, Melvin D.
Assistant Examiner: Contreras, Wenceslao J.
Attorney: Lerner; Herbert L.