Abstract: A time base signal for controlling the recording of binary data is developed by measuring the velocity of a magnetic record. The velocity is measured by determining the time interval required for a mark recorded by a write head to move a predetermined distance to a read head.

Abstract: A closed two phase liquid-vapor heat transfer device is provided which is independent of orientation and requires no wick. A micro helix containment vessel contains liquid to form a coolant vapor phase. Heat input at the evaporator section results in evaporation of the liquid at the liquid-vapor interface. The vapor flows through the bellow and condenses on the opposite end where heat is rejected and liquid is replenished to the evaporator section by flow through capillary passages of helical form in the corrugations of the bellows.

Abstract: A closed two phase liquid-vapor heat transfer device is provided which is independent of orientation and requires no wick. A micro bellows containment vessel is filled with liquid to form a coolant vapor phase bubble which is centered within the vessel due to the surface energy characteristics of the fluid. Heat input at the evaporator section results in evaporation of the liquid at the liquid-vapor interface. The vapor flows across the bubble and condenses on the opposite side where heat is rejected and liquid is replenished to the evaporator section by flow through the continuous liquid film.