Abstract: A method is provided for producing superconducting Josephson devices using a chemical etching solution which comprises forming a mask on a predetermined portion of a MgO substrate, and immersing the MgO substrate having the mask in an aqueous acid solution in which the volume ratio of phosphoric acid to sulfuric acid is approximately 10:1 or more, so as to form a step at the boundary between the masked region and the unmasked region.

Abstract: A DC motor controller for use with a battery powered DC motor operatively positioned in a vehicle is disclosed. A power source-watch dog circuit 2 monitors a micro computer 8 and decreases the battery supplied voltage to below a predetermined voltage. A key switch input circuit 3 receives a switch-on signal generated by a key switch and outputs a signal to the power source-watch dog circuit 2 to initiate electrical power output from the battery 1 to the micro computer 8. A pedal input circuit 4, which includes a pedal for varying electrical resistance, converts the varied resistance into an analog signal and outputs the analog signal to the micro computer 8. The micro computer converts the analog signal to a digital signal and outputs the digital signal. A D/A converter converts the digital signal outputted by the micro computer into an analog signal and outputs the analog signal. A pulsewidth modulator 10 modulates the analog signal and outputs the modulated signal.

Abstract: The present invention relates to syringe loading shields for use with syringes during the drawing, calibration and injection of aliquots of radioactive materials. Each syringe loading shield is provided with means for shielding radiation emanating from the mouth of the vial during the material-withdrawal, syringe loading process. In a preferred embodiment, the syringe loading shield comprises a radiation detector for detecting and calibrating the radioactive dosage of the material which is drawn into the syringe barrel. In the preferred embodiment, a substantially tubular syringe shield coupleable to a mouth shield-detector assembly is disclosed which facilitates the drawing, calibration and injection of radioactive materials without exposing the radio-pharmacists to unshielded materials.

Abstract: The present invention relates to syringe loading shields for use with syringes during the drawing of aliquots of radioactive materials from shielded vials containing same. Each syringe loading shield is provided with means for shielding radiation emanating from the mouth of the vial during the material-withdrawal, syringe loading process. In a preferred embodiment, the syringe loading shield comprises a radiation detector for detecting and calibrating the radioactive dosage of the material which is drawn into the syringe barrel. In the preferred embodiment, a substantially tubular shield having a high density viewing window recessed therein is disclosed which is comprised of a plurality of sheaths. A novel hand shield and syringe for use with radioactive materials are also disclosed. spThis is a continuation of application Ser. No. 121,211, filed Feb. 13, 1980 now U.S. Pat. No. 4,307,713.

Abstract: The present invention relates to syringe loading shields for use with syringes during the drawing of aliquots of radioactive materials from shielded vials containing same. Each syringe loading shield is provided with means for shielding radiation emanating from the mouth of the vial during the material-withdrawal, syringe loading process. In a preferred embodiment, the syringe loading shield comprises a radiation detector for detecting and calibrating the radioactive dosage of the material which is drawn into the syringe barrel. In the preferred embodiment, a substantially tubular shield having a high density viewing window recessed therein is disclosed which is comprised of a plurality of sheaths. A novel hand shield and syringe for use with radioactive materials are also disclosed.