Abstract: An economizer construction for use in recovering heat from flue gases is disclosed including a housing with a flue gas passage therethrough, a helically wound heat transfer coil positioned in the flue gas passage for placing a heat transfer fluid in a heat exchange relation with the flue gases passing through the flue gas passage where the heat transfer coil defines a generally vertically extending central opening therethrough, and a soot blower assembly with an elongate soot blower lance rotatably mounted in the coil central opening for directing a pressurized cleaning fluid over the heat transfer coil to periodically clean it. Different embodiments of the rotary mounting of the soot blower lance are disclosed. Also, different embodiments of the drive means for rotating the soot blower lance are disclosed.

Abstract: A phono-socket assembly has a stamped and drawn thin sheet metal grounding shell provided with retainer means at one end of the shell and supporting attachment bracket means on the opposite end of the shell for mounting of the assembly on a panel, and an elongate tubular contact has a phono-plug pin receiving head end portion mounted within the shell on annular insulating means with a terminal portion extending from said opposite end of the shell, retaining fingers extending from said opposite end of the shell and having retaining tips turned toward and into retaining engagement with the insulating means to retain the insulating means in assembled relation within the shell in cooperation with the retainer means and thereby maintaining the head end portion of the contact in position within the shell to receive a phono-plug pin in electrical contact in the contact head end portion.