Abstract: A power meter is disclosed. The power meter may be used to determine the electric power being delivered by a conductor. In one such power meter there is a substrate, an inductive pickup coil attached to the substrate, a conductor, and a detector. The pickup coil may be printed on the substrate.

Abstract: An electronic gas sensor signal conditioner which can automatically adapt to a wide variety of commercial off-the-shelf sensors and provide a digital output in a standard, easily used format. The signal conditioner has analog and digital sections. The analog section includes a sensor excitation sub-section and a signal amplification sub-section. The digital section comprises a microcontroller and controls the analog section. The digital section also converts the signal from the analog section into digital form, reads the sensor TEDS (Transducer Electronic Data Sheet), applies calibration constants and converts the signal into a standard, easily readable digital format.

Abstract: An electronic gas sensor signal conditioner which can automatically adapt to a wide variety of commercial off-the-shelf sensors and provide a digital output in a standard, easily used format. The signal conditioner has analog and digital sections. The analog section includes a sensor excitation sub-section and a signal amplification sub-section. The digital section comprises a microcontroller and controls the analog section. The digital section also converts the signal from the analog section into digital form, reads the sensor TEDS (Transducer Electronic Data Sheet), applies calibration constants and converts the signal into a standard, easily readable digital format.

Abstract: A planar optic sensor for measuring the optical absorbance spectrum of a side variety of substances in situ comprises a planar waveguide Mach-Zehnder interferometer having a reference path and a sensing path. The sensing path of the waveguide is exposed to the sample under test, the sample interacting with the guided light via emanations from the light as it propagates through the sensing path. The reference path of the waveguide is provided with a heater that linearly varies over time the refractive index of the reference path material, in this manner varying the optical path length of the reference path. Fourier spectroscopic techniques are applied to compare the spectrum of a white light source without a sample present in the sensing path to the spectrum of the white light source in the presence of a sample in the sensing path, as the optical path length of the reference path is swept over time. From these data the absorption spectrum of the sample is determined.

Abstract: The invention is an apparatus for use in serial radiography which provides replicable projection geometry between an energy source, an intraoral target area, and an image receptor. The device uses a biting surface bearing the impressions of a patient's tooth surfaces and an alignment arm which terminates in an alignment ring. The alignment ring is received by a sensor ring affixed to an x-ray source to provide proper projection geometry. Sensors in communication with electronic means may be disposed about the sensor ring to indicate proper alignment. The biting surface may comprise an acrylic stent or a platform supporting a quantity of an impressionable material.

Abstract: The invention is an apparatus for use in serial radiography which provides replicable projection geometry between an energy source, an intraoral target area, and an image receptor. The device uses a stent and an alignment arm which terminates in an alignment ring. The alignment ring is received by a sensor ring affixed to an x-ray source to provide proper projection geometry. Sensors in communication with electronic means may be disposed about the sensor ring to indicate proper alignment.

Abstract: A flow control device for supplying oxygen to a medical patient using provides pulses of oxygen only when the patient inhales, using a flow valve unit that receives a pressurized oxygen supply and delivers a controlled oxygen supply output through a cannula to a patient. A pressure sensor detects breathing changes and output signals that are amplified and automatically corrected for signal errors, such as those caused by offset voltage and temperature drift, by use of a negative integral feedback module that includes automatic correction circuits and a switch for selectively disconnecting the feedback. The amplified sensor signal generates control signals, including an output pulse delivered to the flow valve, having a pulse width that is a user adjustable for control of the opening and closing of a valve, such as a three-way solenoid valve, for outputting time selectable pulses of oxygen to the patient when patient inhalation is detected by the pressure sensor.