Signals and indicators – Indicators – Visual light signal
Patent
1976-11-22
1980-04-22
Goldberg, Gerald
Signals and indicators
Indicators
Visual light signal
73356, 116216, G01K 1116
Patent
active
041989201
ABSTRACT:
An energy conservation indicator for use in an enclosed locality adapted to be heated and/or cooled to temperatures maintained within limits recommended for energy conservation purposes comprises a thin disc of transparent material, having a backing provided with contrastingly colored printed matter and images of parts of a human face, such as eyes and eyebrows. A first configuration of encapsulated liquid temperature-sensitive crystals is arranged between the disc and the backing below the eyes to represent the image of a mouth on the face. The liquid crystals are of such a nature as to reflect incident white light through the disc at temperatures between a recommended upper temperature for heating and a recommended lower temperature for cooling, and said first configuration of the crystals constitutes an upwardly arced curve which, when activated, imparts to the face a frowning countenance to thereby indicate to an observer that the temperature in the locality is not within the recommended limits.
The indicator may include a second configuration of encapsulated liquid crystals between the disc and the backing, arranged and adapted, when activated, to impart to the face an image of a smiling countenance.
REFERENCES:
patent: 2308087 (1943-01-01), Lappala
patent: 3117442 (1964-01-01), Brooks
patent: 3861213 (1975-01-01), Parker
Corr Denis E.
Goldberg Gerald
Mansen Harry G.
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