Abstract: Krypton and a monolithic porous carbon such as Saran carbon are used respectively as the sorbate and sorbent of an adsorption type refrigerator to improve refrigeration efficiency and operational longevity.

Abstract: A chemisorption refrigeration system includes dual containers containing a material such as silver which is alternately heated and cooled to chemically desorb and reabsorb oxygen gas. The gas is desorbed at high temperature and pressure and is pre-cooled and then passed through a Joule-Thomson valve where it is expanded and partially liquefied to provide cooling at 60.degree.-100.degree. K. The liquefied oxygen is then boiled and returned to a cooled container where it is reabsorbed. By alternately heating and cooling the containers, a continuous source of high pressure high temperature oxygen can be provided.

Abstract: A compact hydride absorption refrigeration system with few moving parts for 10.degree. Kelvin operation is disclosed and comprises liquid hydrogen producing means in combination with means for solidifying and subliming the liquid hydrogen produced. The liquid hydrogen is sublimed at about 10.degree. Kelvin. By using a symmetrical all hydrogen redundant loop system, a 10.degree. Kelvin refrigeration system can be operated for many years with only a fraction of the power required for prior art systems.

Abstract: A sidearm holster having a latchable flap or strap composed of a spring metal strip having one end anchored in the rear part of the holster and arranged to snap upwardly when the flap is unlatched, and provided with a latching mechanism which can be manually actuated to positively unlatch the flap.