Abstract: The invention herein teaches a crown system for kilns and furnaces for the high temperature firing of materials. One method used in the industry for a crown system consists of supporting layers of insulation with inverted T-rails attached to bones which are further attached to hanger devices hanging from pipes that rest upon an ultimate support system. To overcome the numerous problems associated with the prior art the following considerable modifications have been made: 1) slotting each inverted T-rail, along its narrow attaching flange and adding stops to each side of said slot such that the bone is evenly spaced along the T-rail when inserted and slid into position, 2) fitting rigid insulation cases fully between the bones and adjacent layers of insulation and 3) said insulation cases and said T-rail stops combine to lock said bones in position.

Abstract: The invention herein teaches a crown system for kilns and furnaces for the high temperature firing of materials. One method used in the industry for a crown system consists of supporting layers of insulation with inverted T-rails attached to bones which are further attached to hanger devices hanging from pipes that rest upon an ultimate support system. To overcome the numerous problems associated with the prior art the following considerable modifications have been made: 1) slotting each inverted T-rail, along its narrow attaching flange and adding stops to each side of said slot such that the bone is evenly spaced along the T-rail when inserted and slid into position, 2) fitting rigid insulation cases fully between the bones and adjacent layers of insulation and 3) said insulation cases and said T-rail stops combine to lock said bones in position.

Abstract: This invention relates to a boot for jaw traps. The resilient floor section of the boot extends beneath substantially the entire trap. The floor of the boot has a surface that conforms to the various trap parts such as the frame and cross member and has indentations which receive the coiled springs. Outwardly projecting sections of the boot extend beneath the spring levers and provide support therefor. A trap set in the boot is extremely stable and is capable of springing upwardly to an extent greater than if it were directly in contact with the ground.

Abstract: This invention relates to an insert for jaw traps. The insert is a resilient device which extends between the bait pan and the jaws, when they are in their open position. A slot extends through the entire thickness of the insert between the outer periphery thereof and the aperture which receives the bait pan. Support means maintains the top surface of the insert at a level that is at or near the topmost surface of the set jaws.