a metal heat tongue having a first and second run meeting at approximately right angles with respect to one another with one of the runs slidably located in {HEAD ~ a substantially vertical channel} defined in {TAIL ~ the holder} with the other run of the heat tongue engagable against an upper portion of the holder whereby downward sliding movement of the heat tongue 
defined in
a metal heat tongue having a first and second run meeting at approximately right angles with respect to one another with one of the runs slidably located in { HEAD ~ a substantially vertical channel } defined in { TAIL ~ the holder } with the other run of the heat tongue engagable against an upper portion of the holder whereby downward sliding movement of the heat tongue
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH