generally indicated by the reference numeral 40 is disposed concentrically within tubular casing 35 and is spaced from the inner wall surfaces of casing 35 by spaced insulating grommets 42 43 a third tubular casing comprising a heat transfer tube 48 is slidably mounted over the leading end of casing 38 an aluminum heat sink member 49 is press fitted into the open end of tube 48 and is normally spaced from heater 39 by the distance established by the engagement of the opposite end of tube 48 with grommet 42 fig9 as seen in fig9 and 10 heater element 39 comprises a cylindrical ceramic member 50 having a resistance wire 51 embedded therein member 50 is press fitted in tubular casing 38 additional circuit elements in tube 38 include theremostat 52 and fuse 56 secured to a flanged member 53 which is insulated from tube 38 by suitable spacing insulation such as rtv adhesive indicated at 62 in fig9 thermostat 52 is provided with an abutting elongated probe 54 which extends into an axial conduit 55 provided in ceramic member 50 in use when current is applied to iron 10 through power cord 57 fig1 to 3 having internal connections with circuit wires 58 through connector 82 in a manner to.