Title: Electromagnetic displays with resiliently mounted components

Abstract: A rotatable element for a display element is constructed of an open ring which supports a display surface resiliently bent from its unstressed attitude and held in such position. The element is designed to be pivotally mountable on an axis generally parallel to the mean plane of the display surface. The element is preferably magnetically operable by an exterior magnetic field and the element carries a magnet defining a field transverse to the pivotal axis. The exterior field for the rotatable element is preferably provided by a coil wound core resiliently mounted on the support surface for the element. The support surface provides brackets for location on each side of the element position and designed to receive a shaft mounting such elements.

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Inventors: Winrow, Donald (Weston, CA, US)

Application Number: 563227
Filing Date: 1975-03-28
Publication_date: 1976-08-17
Assignee: Ferranti-Packard Limited (Toronto, CA)
Primary Class(es): 340/815.62 40/447, 340/815.86
Other Classes:
US Patent Ref:

3025512	Mar, 1962	Bloechl	340/373.
3036300	May, 1962	Knight	340/373.
3074060	Jan, 1963	Kadlec	340/373.
3140553	Jul, 1964	Taylor	340/373.

Other Refs:
Primary Examiner: Caldwell, John W.
Assistant Examiner: Wannisky, William M.
Attorney: