Abstract: A solution containment system for use in connection with an iontophoretic bioelectrode having a solution containing receptacle. The solution containment system includes a nipple formed in the wall of the receptacle, a capsule disposed in the nipple, and a liquid absorbing material contained in the capsule. The capsule is burstable when squeezed so that the liquid absorbing material is released into the interior of the receptacle to absorb any solution left over from use of the bioelectrode.

Abstract: A printer employing a steel band having type and control indicia etched along one surface. A variable reluctance transducer senses the control indicia to properly time the operation of the printer. The transducer contains an axial pole and a concentric cylindrical pole, in which are located a coil and a cylindrical magnet.

Abstract: An electronic feedback control system which compensates for errors in the position information signals output from a pair of photodetectors in a linear motion position transducer, such as used to locate a read-write head over an addressed track in a magnetic disc file system. The control circuitry sums the instantaneous values of the time varying photodetector outputs to produce a combined output signal. The peak positive value of the combined signal is determined and compared with a preselected reference value. An error signal proportional to the difference between the peak and reference values is generated and amplified to produce a correction signal. The correction signal is then applied to the variable energization input of the light source which illuminates the photodetector pair. The correction signal reduces the error signal toward zero by causing the light source to compensate for error in the photodetector output signal.

Abstract: A high speed line printer having a number of sets of hammers; one hammer for each character position defining a line of print, which coact with a moving type band. Each hammer time shares one of a number of drive circuits with others of the hammers in a set. A line may be printed in the time that a type font on the band moves past any particular character position.