Abstract: Components eluted from a chromatographic column are conveyed to a detector through a conduit that is thermally conductive and in thermal contact with the detector so that negative thermal gradients are prevented when the detector is held at a temperature higher than that of the column.

Abstract: An apparatus for detecting the presence of volatile, organic substances in gaseous mixtures comprises a filament on which the substances are absorbed when the filament is cold and released when hot, an electron capture device to detect the emitted substances, a primary and a secondary flow of inert gas, and a valve system in which system an inlet valve which admits the gaseous mixture automatically closes when the gas pressure of the gases within the apparatus exceeds the ambient pressure, the presence of the volatile organic substances being indicated by an output signal from the electron capture device. The apparatus alternatively may be used for controlling the flow of gases containing organic volatile substances.The filament may be sensitive to specific vapors.

Abstract: A crane safe load indicator uses a single low generator unit supplied with operating potentials from a digital storage device via a digital-to-analog converter and sample and hold circuits. The storage device stores information related to the operating characteristics of the crane for each mode of operation thereof thereby eliminating the need for a separate law generator unit for each mode of operation, each of which requires a plurality of potentiometers to provide the proper input-output characteristics.

Abstract: A device for the calibration of the safe load indicating apparatus on cranes and derricks that have a pivoted, extensible boom luffed by a hydraulic ram. The device operates by combining electrical signals corresponding to the actual turning moment of the unloaded boom at given boom positions with generated calibration signals corresponding to the turning moment for the theoretical maximum load at the boom positions, by comparing these combined signals to the safe load signals from the crane's law generator unit and by adjusting the law generator unit accordingly.This invention relates to a method and apparatus for the calibration of safe load indicating apparatus for use with cranes, derricks and other lifting apparatus of the type having a pivoted, extensible boom which can be luffed by an hydraulic ram or other boom supporting means.

Abstract: An automatic liquid sampler for a gas chromatograph includes a sampling mechanism and a control system which controls both the sampling mechanism and other functions of the chromatograph. Four sub-programs are stored in an integrated circuit read-only memory. A complete program for analyzing a series of samples consists of a sequence of the sub-programs read out by a counter under the control of a logic switch unit connected between the final stages of the counter and the most significant address inputs of the memory. The logic switch unit includes a rotary wafer switch which can be manually set to one of twelve positions each corresponding to a unique complete program made up from the sub-programs according to the wiring of the switch.

Abstract: A crane load indicator in which actual loading is determined by a strain transducer as a function of shear stress on a crane boom. A resultant actual loading signal is compared with a computed signal representative of the maximum crane loading for the prevailing conditions and the two signals are compared to provide an indication of available lifting capacity.

Abstract: In a liquid chromatograph apparatus, a pulse damper consists of a block of solid material almost filling the cavity of the damper, for example a polytetrafluoroethylene block occupying 99% of the volume of the cavity but arranged to move freely therein.

Abstract: A crane safe load indicator combines signals representing the total loaded boom turning moment and the turning moment of the boom alone to derive a third signal representing the turning moment of the load alone. The third signal is compared with a signal representing the crane's maximum safe load moment to indicate available lifting capacity.