Constant temperature box

Claim 1

A portable constant temperature box for cooling or warming the box contents at a constant temperature, comprising: (a) a body defining an inner space for receiving objects to be kept warm or cold, said body having an upper opening and comprising side walls and a bottom wall which are of adiabatic constructions, (b) a lid of adiabatic construction pivoted to the upper portion of said body to open or close said upper opening, (c) means for tightly closing said upper opening with said lid, (d) a container forming a cooling or heating source supported horizontally at an uppermost portion of said body, said container projecting upwardly from the uppermost portion of said box body and comprising an airtight, flat, hollow container having a small height for receiving liquid serving as the cooling or heating medium and a liquid intake and a stopper for closing said intake, said container having at an upper wall thereof a recess for receiving small articles and an upper wall of adiabatic construction except for a portion thereof which forms at least the bottom of said recess, said portion having a heat-transferable construction; and (e) support means for horizontally supporting said container at an uppermost portion of said body.