Now showing items 1-10 of 10
Non-destructive tester for transistors
(United States Patent and Trademark Office, 1989-07-25)
A non-destructive reverse-bias second breakdown tester for testing semiconductor devices such as transistors and thyristors that have a base-collector-emitter configuration. The tester basically comprises a socket for ...
Zero-voltage-switched multi-resonant converters including the buck and forward type
(United States Patent and Trademark Office, 1989-08-15)
A multi-resonant-switching network that operates under switching conditions that are favorable to both the active switch and the diode that constitute the switch. In a zero-current multi-resonant switch, the resonant circuit ...
Multi-loop control for quasi-resonant converters
(United States Patent and Trademark Office, 1989-09-12)
A multi-loop controller for controlling a quasi-resonant converter having a power switch, a filter inductor and an output voltage. The controller includes a sensor circuit for sensing the output voltage of the converter. ...
Modal domain optical fiber sensors
(United States Patent and Trademark Office, 1989-08-08)
A modal domain optical fiber sensor for vibration monitoring and as a mechanical motion detector. A laser that focuses coherent light through a lens into one end of a multimode optical fiber. The fiber is secured to a ...
Half-bridge zero-voltage switched multi-resonant converters
(United States Patent and Trademark Office, 1989-08-22)
A half-bridge zero-voltage-switched multi-resonant converter. The converter basically comprises a device for converting an input voltage signal to a DC output signal to be imposed across a load. The device includes input ...
Heat flux gage
(United States Patent and Trademark Office, 1988-10-25)
The invention is a heat flux gage applied to a surface, for the measurement of surface heat transfer. All elements of the gage are thin films, deposited on the surface by sputtering or an equivalent process. The gage ...
Method of detecting, isolating and purifying clostridium difficile toxin A and its receptors
(United States Patent and Trademark Office, 1989-09-05)
A method is provided for detecting the presence of C. difficile toxin A. Stool or other appropriate specimen is contacted with a reagent containing an available non-reducing galactose-alpha-1-3-galactosyl structure, which ...
Apparatus for breaking bacterial cells
(United States Patent and Trademark Office, 1981-10-20)
A multiple tube holder is suspended at the upper end on a frame so that the lower end can pivot through a small arc about a horizontal axis adjacent the upper end of the holder. A motor is connected to the lower end of the ...
Antibody for C.difficile
(United States Patent and Trademark Office, 1989-11-07)
Monoclonal antibody to toxin A of C.difficile has been prepared and is used in an assay for toxin A of C.difficile.
Resonant converters with secondary-side resonance
(United States Patent and Trademark Office, 1988-11-15)
A family of quasi-resonant converters is disclosed as comprising a voltage source, a transformer having primary and secondary windings, and a switch for periodically coupling the voltage source to the primary winding, ...