Abstract: A dual working-electrode electrochemical detector includes two working-electrodes disposed in parallel, opposed and closely spaced relationship. The electrodes comprises a low temperature isotropic carbon, and the electrodes are spaced by a Teflon spacer. A channel is formed in the Teflon spacer for the flow of the biological fluid to be tested. The electrodes are mounted on hollow members, and the entire arrangement is held in fluid-tight engagement by a pair of yokes which overlie the hollow members.

Abstract: A winch arrangement intended for the rapid shifting of aircraft or other wheeled vehicles which incorporate their own braking system and which may be under the control of an occupant during winching, is so constructed as to provide compensation for wide fluctuations in load on the winch due to a possible lack of coordination between operation of the winch drive and the control of the vehicle. The winched arrangement comprises a drive motor, a winch drum assembly coupled to the drive motor by means of a transmission incorporating a reduction gear said transmission being of relatively high inertia, so that it can run on to drive the winch drum and take up slack in the winch rope in the event of stoppage of the drive motor. The transmission preferably includes an eddy current overload coupling.