Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 175
material; (2) the use of asemi-solid electrolyte with a view toavoiding acid-spilling; (3) a specialarrangement rendering it practicallyimpossible for lamps to be put on chargewith reversed polarity ; (4) a patentshock-absorbing arrangement in con-nection with the bulb, springs beinglocated under… … Fia. 1.—Typical Searchlight.
Lighting
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