Illumination – Self powered lamp – Flashlight elements
Patent
1983-09-30
1986-12-09
Feinberg, Craig R.
Illumination
Self powered lamp
Flashlight elements
429118, F21L 700
Patent
active
046284206
ABSTRACT:
A deferred action electric cell of the type having a magnesium anode and a silver halide cathode, wherein the electrolyte is supported in dried form intermediate the electrodes for rapidly developing full electrical potential upon the addition of any aqueous fluid, even fresh water. A novel method of coating the magnesium anode utilizing a detergent bath produces a coating that prevents corrosive deterioration of the magnesium from handling and from close proximity of the dried electrolyte, for an extended shelf life. One form of survival lamp embodying the cell utilizes the tubular magnesium anode as the body of the lamp, with a light bulb seated in one end thereof and the other end open for introduction of activating water; while another form adapted to be dropped into a body of water as a floating signal light has the cell sealed inside of a can-like cylindrical container having a light-transmitting dome at the top and a bottom adapted to be torn out along a tear line to expose the cell prior to dropping the unit into the water.
REFERENCES:
patent: 2070818 (1937-02-01), Winckler
patent: 2790893 (1957-04-01), Lane
patent: 2794904 (1957-06-01), Salauze
patent: 3647550 (1972-03-01), Kober et al.
patent: 4005246 (1977-01-01), Schiffer et al.
Feinberg Craig R.
Gabriel Albert L.
Safford Beverly
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