Monolithic porous filler for cylinders and method of producing same

Claim 1

AN ACETYLENE CONTAINER COMPRISING A CLOSED CYLINDER SHELL; A CURED AND DRIED MONOLITHIC FILLER MASS IN SAID SHELL HAING SMALL SUBSTANTIALLY UNIFORMLY DISTRIBUTED PORES, A DENSITY NOT GREATER THAN 20 POUNDS PER CUBIC FOOT, A CRUSHING STRENGTH GREATER THAN 200 POUNDS PER SQUARE INCH, AND A POROSITY OF OVER 86% TO ABOUT 93%, SAID MASS COMPRISING MAINLY CALCIUM SILICATE IN WHICH THE RATIO OF SILICA AS SILICON DIOXIDE TO CALCIUM AS CALCIUM OXIDE IS FROM 1 TO 1.5 SAID MASS ALSO CONTAINING BETWEEN 4 AND 20% OF AN INERT MINERAL FIBER TOGETHER WITH MINOR AMONTS OF OTHER FILLER MODIFYING MATERIAL; AND A CLEARANCE SPACE BETWEEN THE CURED AND DRIED FILLER MASS AND THE INNER WALLS OF SAID SHELL, THE TOTAL THICKNESS OF SAID CLEARANCE SPACE BEING NO LESS THAN ABOUT 1/64 INCH AND NOT GREATER THAN 1/8 INCH.