Electricity: circuit makers and breakers – Electrostrictive or electrostatic
Patent
1979-06-22
1981-04-28
Shepperd, John W.
Electricity: circuit makers and breakers
Electrostrictive or electrostatic
H01H 5700
Patent
active
042647983
ABSTRACT:
The indentations in a serrated wall are used as a temporary storage volume for a conducting liquid. A conducting layer in the serrated wall is separated from the conducting liquid by a thin dielectric layer. Electrostatic forces at selected times pull the liquid into the serrations. When the liquid later relaxes to a configuration touching the serrations only near the peaks it leaves the indented volume of the serrations, thus causing liquid movement at a liquid border elsewhere. This may result in extension beyond a chamber of a multichamber mercury switch. An added bonus is as follows. The reduced area of contact with the serrated wall in the relaxed liquid state can benefit a mercury switch, because the reduced area means a reduction in the amount of surface adhesion energy which must be overcome in removing a mercury globule from a chamber.
REFERENCES:
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patent: 2851547 (1958-09-01), Hartz
patent: 2891242 (1959-06-01), Lukoff
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patent: 3670130 (1970-02-01), Greenwood
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