Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1975-06-27
1977-01-04
Hohauser, Herman J.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200276, H01H 1352
Patent
active
040015343
ABSTRACT:
A switch assembly which has a pair of electrically non-conductive sheets which are maintained spaced from each other by a suitable spacer structure. One sheet is formed with an opening passing therethrough and the spacer structure is clear of this opening so that the sheets have inner surface regions directed toward each other with one of these surface regions surrounding the opening and the other surface region being directed toward the opening. A switch-operating structure is freely movable through this opening and is electrically conductive. This switch-operating structure has between the sheets an inner enlarged electrically conductive head end which has a thickness less than the space between the sheets so that this inner head end is movable between the inner surface regions of the sheets. The switch-operating structure has an outer enlarged electrically conductive head end situated at the exterior of the sheet which is formed with the opening, at the side of the latter opposite from the other sheet. A spring surrounds the switch-operating structure and engages the one sheet as well as the outer enlarged head end of the switch-operating structure so as to urge the inner enlarged head end thereof toward the inner surface region which surrounds the opening through which the switch-operating structure extends. The outer surface of the sheet which is formed with the opening carries an electrically conductive coating which engages the spring which is itself electrically conductive, and one of the above inner surface regions also carries an electrically conductive coating to be engaged by the inner enlarged electrically conductive head end of the switch-operating structure. In this way when the latter structure is displaced with respect to the opening toward the sheet which does not have the opening therein, an electrical circuit which includes the electrically conductive coatings will have its condition changed.
REFERENCES:
patent: 3610857 (1971-10-01), Nanninga
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