Display device for varying the shape and cross-section of a rect

Details Display device for varying the shape and cross-section of a rect Display device for varying the shape and cross-section of a rect

1973-11-12

1976-01-27

Rein, Melvin D.

Card, picture, or sign exhibiting

Check, label, or tag

Reinforced

G09F 1100

Patent

active

039343642

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.

REFERENCES:
patent: 1813689 (1931-07-01), Weisker
patent: 1882293 (1932-10-01), Mueller
patent: 2245527 (1941-06-01), Grabfield

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