Abstract: The apparatus is a device for transferring heat across the hinged joint between the two sections of the case of a laptop computer. Two simple heat pipe cylinders are inserted into parallel cylindrical holes in a heat conductive block. One cylinder is bonded within its hole, and the other cylinder is permitted to rotate within its hole. The axis of the rotatable cylinder is located in line with the axis of the mechanical hinges which permit the panels to pivot relative to each other. A heat producing device in one panel can be then attached to one heat pipe, and a heat sink on the other panel can be attached to the other heat pipe. The heat transfer between the heat source and the heat sink is essentially that of a heat pipe except for the very short heat conductive path through the solid block and the one rotating joint.

Abstract: The apparatus is a cooling device for an integrated circuit chip which includes a heat conductive pad for contact with the top surface of the chip and for attachment to a heat pipe to dispose of the heat. One surface of the pad is flat and contacts the circuit chip while the opposite surface of the pad is attached to a simple cylindrical heat pipe. The pad includes extensions from its sides to which a holding fixture applies force so that the pad is held tightly against the chip. The holding fixture is held on the mounting board by screws while the top of the pad which is attached to the heat pipe protrudes through a hole in the holding fixture. A finned heat exchanger is attached to an end of the heat pipe remote from the conductive pad.

Abstract: A film of photoemissive material, such as antimony, is vaporized from a platinum-antimony source onto a substrate in an enclosure. The source is preferably a plurality of beads formed by attaching substantially spherical particles of platinum-antimony (50--50 by atomic volume) to a platinum-clad molybdenum wire. The spherical particles are accurately sized so that each bead comprises substantially the same amount of antimony. The beads are symmetrically arranged about the substrate so that upon evaporation a substantially uniform film of photoemissive material is deposited on the substrate.

Abstract: An alkali metal dispenser in an electron tube for vapor depositing alkali metals on photoemissive surface within the tube envelope comprises a non-welded-tubular housing having walls formed by spirally rolling upon itself a thin sheet of tantalum so that the walls spirally overlap, preferably twice. The "double wrapped" dispenser prevents uncontrollable escape of alkali particles contained within the interior of the tubular housing and provides a substantially uniform orifice for repeatable release of alkali vapors.