Heat exchanger tube supports

Claim 1

A HEAT EXCHANGER COMPRISING AN ELONGATED SHELL; A BUNDLE OF ELONGATED HEAT EXCHANGE TUBES LOCATED IN SAID SHELL, SAID TUBES BEING SPACED FROM EACH OTHER AND DISPOSED SUBSTANTIALLY PARALLEL TO EACH OTHER AND TO SAID SHELL AND SUBSTANTIALLY EQUIANGULARLY SPACED AROUND A CENTRAL AXIS; AND A SPACER ENGAGING SAID TUBES AND SAID SHELL TO LOCATE SAID TUBES WITH RESPECT TO SAID SHELL AND TO EACH OTHER, COMPRISING A FIRST SET OF OUTWARDLY OPENING CHANNEL MEMBERS OF SUBSTANTIALLY IDENTICAL CROSS SECTION EXTENDING LONGITUDINALLY ALONG AND SPACED SUBSTANTIALLY EQUIANGULARLY ABOUT SAID AXIS, EACH OF SAID CHANNEL MEMBERS HAVING OUTWARDLY DIVERGING SIDEWALLS, A SECOND SET OF CHANNEL MEMBERS ALTERNATELY DISPOSED BETWEEN THE CHANNEL MEMBERS OF SAID FIRST SET AND EXTENDING LONGITUDINALLY ALONG AND DISPOSED SUBSTANTIALLY EQUIANGULARLY AROUND SAID AXIS, EACH OF SAID CHANNEL MEMBERS OF SAID SECOND SET BEING OF SUBSTANTIALLY IDENTICAL CROSS SECTION AND HAVING OUTWARDLY DIVERGING SIDEWALLS, THE SIDEWALLS OF THE CHANNEL MEMBERS OF SAID SECOND SET TERMINATING ADJACENT TO SIDEWALLS OF ADJACENT CHANNEL MEMBERS OF SAID FIRST SET, AND MEANS FOR LOCATING SAID CHANNEL MEMBERS WITH RESPECT TO EACH OTHER, EACH CHANNEL MEMBER RECEIVING AND SUPPORTING ONE OF SAID HEAT EXCHANGE TUBES TO LOCATE SAID TUBES SUBSTANTIALLY EQUIANGULARLY ABOUT SAID AXIS, AND THE SIDEWALLS OF SAID CHANNEL MEMBERS IN SAID FIRST SET ENGAGING SAID SHELL TO LOCATE SAID SPACER AND SAID TUBES WITH RESPECT TO SAID SHELL.