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being spaced from the positive plate ani the second element from the first by the ribs. The flat face of the second element is ar- ranged in contact with the negative bat- 5 tery plate. What I claim is:- 1. A separator for secondary battery plates comprising a plate having a series of openings there-through and a series of pro- 10 trading members over-hanging and closing the openings on all sides but one. 2. A separator for secondary battery plates comprising a plate having a series of protruding hood-like members, one edge of 15 each of which is cut away to form an open- ing through the plate. 3. A separator for secondary battery plates comprising a plate having a series of protruding hood-like members, the lower
edge of each of which is cut away to form 24 an opening through the plate. 4. A separator for secondary battery plates comprising a sheet of material hav- ing openings extending there-through each of said openings being defined by a hood-like 25 member surrounding the opening and united to the sheet on three sides of the opening. 5. A separator for secondary battery plates comprising a plate having a series of openings therethrough, a series of protrud- 30 ing hood-like members over-hanging said] openings, and ribs extending across the face of said plate and projecting therefrom to a greater extent than the hood-like mem- bers. 35 In testimony whereof I affix my signature. JOSEPH O. LUTHY.