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US 4,916,752 AGranted
Helical visual display device
OwnerJohn G. Thompsoninventor
Life of this patent
Estimating the term…
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.
Claims5
A visual display device having aesthetic appeal, comprising
- a single tubular-like material forming an elongated helical structure having a continuous series of helices,
- a first portion of said helical structure having helices smaller in diameter than the helices of a second remaining portion of said helical structure,
- said tubular-like material having a transition section between said first portion and said second portion of said helical structure for allowing said first portion of said helical structure to extend within the peripheral confines of the helices of said second portion of said helical structure, and
- means for rotating said elongated helical structure, whereby said first portion and said second portion of said helical structure rotate as a unit and the helices of said first portion appear to move in the opposite direction to those of said second portion.
1 more element
A rotating visual display device, comprising
- a pair of helices wound from a tubular-like material, said helices having a common longitudinal axis, and
- the coils of one of said helices being confined within the periphery of the coils of the other helix, whereby said pair of helices appear to be moving in simultaneously opposite directions when said device is rotated, and
- wherein said tubular-like material is a see-through plastic material having a hollow inner core filled with a colored liquid.
Dependencies are inferred from the claim text.