Abstract: A heat pump is provided with an outdoor heat exchanger 30 having a main section 30a and a subcooling section 30b, with a circuiting arrangement and distribution and control means including expansion device 48, check valve 54 and lines 52, 56, 58 and 60 connected so that in a cooling mode of operation of the unit the refrigerant flows through the main section and then the subcooling section in series, and in a heating mode of operation the refrigerant flows only through the main section with the subcooling section receiving refrigerant for storage.

Abstract: The open-face frames of electric heat modules used with a pair of centrifugal fans in a roof top type air conditioning unit are mounted with their upwardly open faces spaced downwardly away from the downwardly facing discharge opening of the fans, rather than up tight against the discharge opening, so that there will be a bypass of at least some of the discharge air from the fan around the module to reduce the resistance to air flow imposed by the module. The arrangement achieves a good balance between the use of relatively high watt density heater while avoiding undue resistance to air flow through the heater. The invention also provides a convenient module mounting arrangement in which the inboard end walls of the modules are supported in a complementary hook and eye arrangement with mounting straps depending from the sides of the discharge openings of the centrifugal fans.

Abstract: A remote access manipulator comprises a locking mechanism capable of self-alignment for performing operations on equipment located in areas where human access is limited. The manipulator further comprises a slave carriage located in the equipment on which the operation is to be performed, such as a nuclear steam generator, for carrying tools and inspection devices for performing operations on the equipment together with a master carriage located in a scale model of the equipment and electrically connected to the slave carriage for controlling the movement of the slave carriage. The slave carriage is capable of advancing across a surface of the equipment to position the devices which it carries. The manipulator further comprises a slave manipulator arm used to move the slave carriage into and out of the equipment on which the operation is to be performed in conjunction with a master manipulator arm located in the scale model for controlling the movement of the slave manipulator arm.

Abstract: The base construction comprises base rails along each side and each end, with each of the rails having the shape in transverse cross section of an upwardly open channel with the outer leg of the channel having a height greater than the inner leg, and the inner leg having a horizontal flange projecting inwardly from along the top of the inner leg, and separate pan means forming the bottom walls for both the outdoor air flow section and the separate indoor air flow section, each including a horizontal wall and an upturned flange along each edge, the pans nesting in the frame formed by the rails, the assembly thus formed being secured together by spot welding the upturned flanges to the outer legs, and the horizontal walls of the pans along their margins to the inwardly projecting horizontal flanges of the rails.

Abstract: A rotary compressor is provided in which the space between the rotor and the encompassing housing wall is separated into suction and discharge spaces by reciprocating vane assemblies, each of which includes a blade portion having a distal end portion carrying a pivotal shoe, the joint between the shoe and blade being of cylinder and socket character with the blade end forming the cylinder part of the joint and the shoe having a socket cavity for receiving the cylinder. In other forms, the shoe has a generally channel shape in transverse cross section with the leg of the channel facing the compression side having vent holes which reduces the turning movement applied to the shoe under conditions of high differential pressures between one side of the shoe and the other. This arrangement promotes stability and reduces the possibility of loss of equilibrium of the shoe against the moving surface.

Abstract: A vane assembly for a rotary compressor is provided having a shoe for sliding against a relatively moving surface and carried on a blade edge in a cylindrical pivot type joint. The shoe is generally channel-shaped in transverse cross-section and has openings in both of the opposite legs of the shoe. The cylindrical-shaped edge of the blade upon which the shoe is mounted is dimensioned relative to the socket of the shoe receiving the edge to permit movement of the cylindrical edge in a direction away from the web of the shoe under a condition of high differential pressure across the shoe so that a relief passage from the high pressure space on the one side of the shoe to the low pressure space on the other side of the shoe is provided by the openings in the legs of the shoe and the cylindrical edge moved apart from the web of the shoe.