.~.~ With interfitting swinging closure and jamb parts
DEFINITION
Classification: 109/74
(under subclass 64) Devices wherein the closure has a swinging movement and wherein the closure and adjacent jamb and closure have projections and recesses (usually, but not necessarily, complementary) which serve to prevent the inserting of tools or liquids, or the transmission of heat in the space between the door and jamb.
SEE OR SEARCH THIS CLASS, SUBCLASS:
65, for devices provided with means to cut down the conduction of heat by the material of the closure at its edge to the interior of the safe.