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US 3,967,478 AGranted
Door latching apparatus actuated by cleansing agent sensor
OwnerStanley G. Guinninventor
Life of this patent
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Abstract
An apparatus for unlatching a door to a hygienic area actuated by sensor electrodes in contact with the electrolytic residue of a cleansing agent upon the hand or limb of a person desiring access to the hygienic area.
Claims5
An apparatus for latching and unlatching a door in a door frame, comprising:
- a. an electromagnetic bolt mechanism adapted to latch said door to said door frame when said bolt mechanism, is de-energized and to unlatch said door from said door frame when said bolt mechanism is energized,
- b. an electrical energy source for said electromagnetic bolt mechanism,
- c. a pair of electrolytically dissimilar electrodes mounted in the vicinity of said door,
- d. said electrodes being spaced apart a distance no greater than the length of the portion of a human limb coated with the electrolytic residue of a cleansing agent spanning and in contact with both said electrodes, whereby an electric current may be established between said electrodes and through said electrolytic residue,
- e. electrical switch means connected to said electromagnetic bolt mechanism and to said energy source, and,
- f. means for actuating said switch means to energize said bolt mechanism, when an electric current is established across said electrodes.
3 more elements
Dependencies are inferred from the claim text.