Abstract: The invention described herein relates to an apparatus for providing a selectively humidified gas to a camera canister (12) containing cameras and film used in space. A source of pressurized gas (leak test gas 26 or motive gas 21) is selected by a valve (30), regulated to a desired pressure by a regulator (34), and routed through an ejector (46) (venturi device). A regulated source of water vapor in the form of steam from a heated reservoir (18) is coupled to a low pressure region (50) of the ejector (46) which mixes with high velocity gas flow through the ejector (46). This mixture is sampled by a dew point sensor (14) to obtain dew point thereof (ratio of water vapor to gas) and the apparatus adjusted by varying gas pressure or water vapor to provide a mixture at a connector (78) having selected humidity content.

Abstract: An ice making refrigeration system embodying an accumulator tank above and externally of a refrigerant chamber and communicating therewith by valved means for gravity flow of liquid refrigerant to the refrigerant chamber during a freezing phase. The upper portion of the accumulator tank communicates with the intake of a compressor to deliver vaporized refrigerant thereto. The upper portion of the refrigerant chamber communicates with the accumulator tank by a vapor-liquid return conduit. The discharge side of the compressor communicates with a condenser and the liquid side of the condenser communicates with the vapor-liquid return conduit downstream of the refrigerant chamber and delivers makeup liquid thereto in the general direction of flow of refrigerant therethrough. Valved means delivers hot gaseous refrigerant under pressure from the compressor to the refrigerant chamber during a harvesting phase.