Apparatus for removing smoke and odors from domestic cooking vapors

Claim 1

IN APPARATUS FOR REMOVING SMOKE AND ODORS FROM DOMESTIC COOKING VAPORS AND THE LIKE: A RIGID REFRACTORY FRAME STRUCTURE, PROVIDING A PASSAGE FOR THE VAPOR AND HAVING AT LEAST ONE PAIR OF PARALLEL, MUTUALLY FACING GROOVES, FORMED IN INNER WALLS OF SAID PASSAGE, SAID GROOVES BEING ELONGATE IN A DIRECTION PARALLEL TO SAID INNER WALLS AND TRANSVERSE OF SAID PASSAGE AND HAVING SUBSTANTIALLY THE SAME DEPTH THROUGHOUT THEIR ENTIRE LENGTH, SUBSTANTIALLY FLAT COIL MEANS OF METALLIC WIRE, HAVING A SURFACE STRUCTURE CATALYTICALLY ACTIVE TO PROMOTE REMOVAL OF SAID SMOKE AND ODORS AND COMPRISING A SERIES OF LONGITUDINALLY ALIGNED CONVOLUTIONS, EACH CONVOLUTION INCLUDING A PAIR OF WIRE TURNS, SO SUPPORTED IN SAID GROOVES AS TO ALLOW SLIGHT MOTIONS OF SAID WIRE TURNS ALONG AS WELL AS ACROSS THE DIRECTION OF SAID GROOVES, EACH CONVOLUTION ALSO INCLUDING A PAIR OF SUBSTANTIALLY STRAIGHT WIRE SPANS, BETWEEN SAID WIRE TURNS, AND A PAIR OF WIRE ELEMENTS, ONE SECURED TO EACH FINAL CONVOLUTION OF SAID COIL MEANS, SAID WIRE ELEMENTS EXTENDING THROUGH SAID FRAME STRUCTURE AND INCLUDING WIRE PORTIONS SO SECURED, OUTSIDE SAID FRAME STRUCTURE, AS TO HOLD SAID COIL MEANS TENSIONED, IN A DIRECTION PARALLEL TO THE DIRECTION OF SAID GROOVES, WHILE ALLOWING SAID MOTIONS, AND FOR THEREBY KEEPING SAID WIRE SPANS SPACED APART, REGARDLESS OF THERMAL EXPANSION AND CONTRACTION THEREOF.