Thermally insulated lock box and lock therefor

摘要

A pickup drop off lock box for medical samples is equipped with a failsafe lock which will not permit the key to be removed without the lid properly positioned to permit latching. Adequate thermal insulation is provided to allow samples to be stored at temperatures of 5° F. for 16 hours. In addition, an inner liner of styrene insulation is removable/replaceable in the event it becomes worn, soiled or damaged. The failsafe lock has potential applicability in other environments.