Abstract: Use, in laminated cores for electrical apparatuses and machines, which cores are to conduct electromagnetically induced magnetic alternating fluxes, of a thin plate of a ferritic stainless steel which besides Fe contains in weight-%, 10-30 Cr, 4-12 Al and Si from traces and up to max 0.7 Si.

Abstract: A method for cutting a glass reflector and a glass reflector produced by a cutting process. The method typically includes forming a fluid jet by ejecting a mixture of fluid and abrasive at an initial pressure, creating a pierce hole in the glass reflector with the fluid jet at the initial pressure, and cutting a ventilation hole in the glass reflector by moving the fluid jet from the pierce hole along a cutting path. The method may also include, after cutting the pierce hole and before cutting the ventilation hole, raising the pressure of the fluid jet from the initial pressure to an increased pressure.

Abstract: A differential spectrometry system detects very narrow-band spectral features, while providing much higher optical transmittance and signal-to-noise ratios than prior optical-filter-based spectrometer systems. A plurality of light detectors (10a, 10b) detect light that falls within respective wide wavebands. The wide wavebands have overlapping and non-overlapping portions, one of which is the desired narrow waveband. The detector outputs are operated upon to produce an output signal (22) which includes substantially only the desired narrow waveband. In the preferred embodiment, the light detectors (10a, 10b) are implemented with a pair of optical detectors (30a, 30b) and respective optical interference filters (24a, 24b). The filters have substantially identical cut-off wavelengths (.lambda..sub.2) and cut-on wavelengths that are shifted by .DELTA..lambda. with respect to each other (.lambda..sub.1 and (.lambda..sub.1 +.DELTA..lambda.), respectively).

Abstract: A differential spectrometry system detects very narrow-band spectral features, while providing much higher optical transmittance and signal-to-noise ratios than prior optical-filter-based spectrometer systems. A plurality of light detectors (10a, 10b) detect light that falls within respective wide wavebands. The wide wavebands have overlapping and non-overlapping portions, one of which is the desired narrow waveband. The detector outputs are operated upon to produce an output signal (22) which includes substantially only the desired narrow waveband. In the preferred embodiment, the light detectors (10a, 10b) are implemented with a pair of optical detectors (30a, 30b) and respective optical interference filters (24a, 24b). The filters have substantially identical cut-off wavelengths (.lambda..sub.2) and cut-on wavelengths that are shifted by .DELTA..lambda. with respect to each other (.lambda..sub.1 and (.lambda..sub.1 +.DELTA..lambda.), respectively).

Abstract: An electrostatic transducer in which a plurality of stretched diaphragm sections are electrostatically charged and an electrical field exerts an electromagnetic force on the diaphragm sections. The electric field varies in response to variations in an input signal to cause responsive movement of the diaphragm sections. Each of said diaphragm sections is constructed and arranged to have a resonant frequency that differs from that of the other diaphragm sections.

Abstract: A mounting pad means for use in combination with solid-state semiconductive translating devices and including a base pad with flange walls extending from said base pad, and with device mounting pad means being secured to the surface of the base pad and comprising a thin layer of silicone base rubber. The base pad an flange walls are formed of a generally rigid laminate with a core having outer metal foil layers disposed on opposite surfaces thereof, and wherein the core is composed of a thin layer of silicone base rubber.

Abstract: A mounting pad means for use in combination with solid-state semiconductive translating devices and including a base pad with flange walls extending from said base pad, and with device mounting pad means being secured to the surface of the base pad and comprising a thin layer of silicone base rubber. The base pad an flange walls are formed of a generally rigid laminate with a core having outer metal foil layers disposed on opposite surfaces thereof, and wherein the core is composed of a thin layer of silicone base rubber.

Abstract: A mounting pad means for use in combination with solid-state semiconductive translating devices and including a base pad with flange walls extending from said base pad, and with device mounting pad means being secured to the surface of the base pad and comprising a thin layer of silicone base rubber. The base pad and flange walls are formed of a generally rigid laminate with a core having outer metal foil layers disposed on opposite surfaces thereof, and wherein the core is composed of a thin layer of silicone base rubber.

Abstract: A thermally conductive electrically insulative laminate for use as a mounting pad and electrical chassis barrier for use with solid-state electronic devices. The pad includes a number of bores with tubular projections extending outwardly therefrom for insulatively protecting the shanks of the mounting screws, bolts or other conductive materials from contact with the substrate. Additionally, the tubular projections are provided with radially extending retention burrs for mechanically holding the mounting pad in place on a substrate pending actual mounting of a semiconductor device thereon.

Abstract: A probe having a temperature sensor mounted in its tip for measuring the temperature of a body into which the probe is inserted, has a heating coil positioned on the shank of the probe near the tip, and a second temperature sensor in the tip area positioned generally between the coil and the first sensor. A control circuit is operative to energize the heater coil in response to differences in the temperature sensed by the two sensors, so that the shank of the probe is heated to track the temperature rise of the tip of the probe upon insertion into a body whose temperature is to be measured. This heat servo thermally isolates the tip from the remainder of the probe, and eliminates long thermal time constants which would otherwise be associated with the flow of heat from the tip area down the probe shank.

Abstract: A highly accurate low-cost electronic thermometer with digital readout, intended primarily for clinical use. Temperature sensing is accomplished by a thermistor in a probe assembly which includes a unique disposable probe cover which provides excellent thermal contact with the thermistor to a measuring circuit which includes a bridge and a rebalancing servo. Digital readout is accomplished by a coding disc driven by the servo and pickoff brushes. The coding pattern on the disc provides analog to digital conversion, compensation for the inherent nonlinearities of the thermistor, and a nonvolatile memory. Means are provided for operating the thermometer in an estimation mode to give readings more quickly than would be otherwise permitted by the thermal response of the probe. In estimation mode, measurement is terminated at a predetermined point in the measurement cycle, and a special calibration of the measurement circuit is used to give an estimate of what the final temperature would be.

Abstract: An electrostatic loudspeaker element including a diaphragm positioned between a pair of acoustically transparent wire grid electrode assemblies. In the preferred embodiment, each electrode assembly comprises a flat rectangular frame having a plurality of wire guiding slots on both sides. A wire whose diameter equals the depth of the slots is wound continuously around the frame in a helical pattern, and a dielectric spacer is adhesively attached to the frame across the slots to maintain the critical distance between the wire grid and the diaphragm. The frame is made of a material having a coefficient of thermal expansion equal to the wire.