Helical visual display device

Details Helical visual display device Helical visual display device

1989-04-03

1990-04-17

Brittain, James R.

Card, picture, or sign exhibiting

Display with special effects

272 8R, 428 8, 428 11, A47F 1106, B44F 100, G09F 1912

Patent

active

049167529

ABSTRACT:
A visual display device having two helices each wound from a single tubular-like material about a common axis and one of the helices being within the peripheral confines of the other and the coils of the one helix being wound in the same direction as the wound direction of the coils in the other helix, so that when the device as a whole is rotated the two helices appear to perpetually move in simultaneously opposite directions, thus offering to the viewer of the rotating display device an aesthetically interesting sight.

REFERENCES:
patent: 640792 (1900-01-01), Munsell
patent: 741730 (1903-10-01), Smith
patent: 2055910 (1936-09-01), Rasmussen
patent: 2108002 (1938-02-01), Smith
patent: 3176265 (1965-03-01), Schweighofer
patent: 3610624 (1971-10-01), Fleiscker
patent: 3683843 (1972-08-01), Schlein
patent: 4008534 (1977-02-01), Swartz
patent: 4214747 (1980-06-01), Rebajes
patent: 4437262 (1984-03-01), Kaga
patent: 4595369 (1986-06-01), Downs
patent: 4637941 (1987-01-01), Rochte

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