A position indication system is described for detecting the relative position of a control rod within the core of a nuclear reactor. The basic sensor of this system is formed from a plurality of discrete electrical coils individually wound around the rod travel housing in a tandem array extend longitudinally along the control rod drive shaft's axis of movement. An AC current is established within each of the respective coils at a sufficiently low frequency to enable the resulting flux to penetra...

A stabilizer against hydrolysis, which can solve conventional problems of a carbodiimide compound compounded in an ester-group-containing resin or a biodegradable plastic as a stabilizer against hydrolysis, such as poor heat resistance and a coloring problem due to yellowing, and can provide enhanced resistance against hydrolysis, and a thermoplastic resin composition of an ester-group-containing resin or a biodegradable plastic containing the same. Specifically, that the stabilizer against hydr...

A circuit for energizing a differential inductor transducer uses rectifier voltage dividers in a balanced bridge circuit.

In order to telemeter data from a moving body to a fixed recorder, a unidirectional voltage representing the data is converted by means of circuitry to frequency modulated pulses which are fed to a transmitting coil which sets up an induction magnetic field; the circuitry and the coil are both mounted on the moving body. A fixed recording system includes a receiver having an antenna located in the induction field of the transmitting coil. The receiver converts the pulses picked up to a unidirect...

In an electrically inductive motion detector of the type having a pair of permanently magnetized pole pieces, each magnetized with a non-alternating polarization, and adjacent a movable magnetic armature element and mutually spaced apart in a direction parallel to preselected motion of the armature element, a sensor winding wound upon a respective one of the pole pieces, logic device for indicating the time of coincidence of the position of the armature element and a reference position during sa...

The angle between a small radio frequency coil and a spatially uniform magnetic field is measured and a signal commensurate with the measured angle is employed in a computation of angular position. The apparatus employed in the angle measurement is characterized by a DC frequency response whereby an output signal is produced in the absence of motion between the coil and field.

A circuit for making linear the response to a mechanical-electrical transducer gauge having variable impedance means within an electrical detecting circuit including a compensating system comprising a feedback loop provided with an amplifier and a compensating impedance constituted by resistive and reactive components. The feedback loop generates an output electrical quantity equal in amplitude and opposed in phase to that absorbed by the undesired impedances. The amplifier includes a grounded c...

An ink jet recording medium, comprises a support; a first layer provided on the support; and a second layer provided on the first layer so as to come in contact with the first layer, the second layer being an ink absorbing layer. The Young's modulus of the first layer is smaller than the Young's modulus of the second layer.

Cephemcarboxylic acid esters of the general formula ##STR1## pharmaceutical preparations which are active against bacterial infections, which contain such cephem derivatives, a process for the preparation of the cephem derivatives and the pharmaceutical preparations, and also the use of the cephem derivatives for combating bacterial infections.

A pick-up device, used with a scale having a pointer movable in front of a dial, the measuring scale carrying a plurality of pick-ups, which comprises a transistorized circuit with a frequency modulated inductance-capacitance circuit, an impedance changer with a quartz filter to which it transmits the oscillator signal, an impedance changer interposed between said filter and an amplifier stage, and transmitting to said stage only the signals generated by said oscillator which correspond to the i...