Electromagnetic displays with resiliently mounted components

Details Electromagnetic displays with resiliently mounted components Electromagnetic displays with resiliently mounted components

1975-03-28

1976-08-17

Caldwell, John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340366E, 40 28C, G08B 500

Patent

active

039757285

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.

REFERENCES:
patent: 3025512 (1962-03-01), Bloechl
patent: 3036300 (1962-05-01), Knight
patent: 3074060 (1963-01-01), Kadlec
patent: 3140553 (1964-07-01), Taylor

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