Devices based on surface tension changes

Details Devices based on surface tension changes Devices based on surface tension changes

1981-06-11

1983-11-29

Sikes, William L.

350312, 350362, 350486, G02F 129

Patent

active

044177860

ABSTRACT:
An optical change in a device is produced through modification of the surface tension between two materials by the change of an electric field. For example, such a device is formed by introducing an electrolyte and a metal such as mercury into a capillary tube. The surface tension between the two fluids is changed through application of a voltage between them. When the surface tension is altered the relative positions of the fluids in the tube also change. Thus, it is possible to introduce one fluid into a portion of the tube which contained the other before the change in voltage, i.e., the position of the interface between the fluids, is moved. If the two fluids have different colors, the translation produces a color change if the area of the tube near the initial interface position is viewed.

REFERENCES:
patent: 4160141 (1979-07-01), Graf

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