Abstract: An evaporator for converting a liquified gas such as chlorine into a superheated gas. The evaporator is constituted by a pressure vessel having a heat pipe vertically mounted therein, the lower end of the pipe projecting below the vessel and being coupled to a heat source whereby thermal energy from the source is transferred to the interior of the vessel. Liquified gas is fed into the vessel through an inlet pipe to form a pool in the lower zone thereof, in contact with the heat pipe. The gas evaporated from the heated pool is discharged through an outlet pipe.

Abstract: A probe immersible in liquid having oxygen dissolved therein and adapted to continuously and accurately measure the oxygen concentration. The probe includes a noble metal measuring electrode, a copper counter-electrode and a potassium hydroxide electrolyte which together define a galvanic cell whose output current depends on the amount of oxygen passing into the cell through a diffusion membrane permeable only to gases. The oxygen within the cell is electrochemically reduced at the surface of the measuring electrode to generate a current that is proportional to the oxygen concentration, the counter-electrode being oxidized.

Abstract: A multiplex telemetering system for transmitting a group of data signals each representing a distinct analog value, over a common channel to a receiving terminal where the data signals are fed into respective sub-channels. The transmitter includes a commutator formed by a series of individually actuatable switches which sequentially supply the data signals to the common channel. At the receiving terminal, the data signals are distributed by a corresponding commutator to the several sub-channels. In order to synchronize the operation of the commutators, an address generator at the receiving terminal cyclically produces a series of multi-bit binary values the number of values in the series equalling the number of switches in each commutator.