Abstract: The invention features a theft resistant security system for motor vehicles. The system has receptacle with a coupling coil. A SAW (surface acoustical wave) device associated with the receptacle for relative movement thereto is also provided. The SAW device has a code and its own coupling coil for interaction with the receptacle coupling coil. A testing mechanism is connected to the receptacle for determining whether the code of the SAW device is valid for operation of the motor vehicle. Problems of crosstalk and wave reflection may produce spurious code pulses in systems of this type. The invention provides techniques for eliminating or reducing these unwanted pulses.

Abstract: An apparatus is featured for controlling remote devices. The status or one or more switches associated with remote devices may be transmitted along a single transmission line. One end of the transmission line contains a surface acoustical wave (SAW) delay line. The SAW delay line responds to an interrogation pulse of radio frequency electromagnetic energy with a series of delayed pulses, each of which transmits the status of a switch by means of the presence or absence of the pulse. The SAW delay line and switches are completely passive, requiring no power source. The transmission line may optionally be interrupted and coupled by means of a pair of inductive coils. This offers the potential for rotation, as within a steering column of an automobile, without wear or damage to the transmission line. The other end of the transmission line contains electronic circuitry to provide the interrogation pulse, to decode the return delayed pulses, and to drive other circuitry as required by the switch positions.

Abstract: Disclosed is a method for adjustably controlling the rate of circulation and temperature gradient in a fluidized bed.

Abstract: A theft resistant security system for motor vehicles. The system has a receptacle with a coupling coil. A surface acoustical wave device associated with the receptacle for relative movement thereto is also provided. The SAW device has a code and its own coupling coil for interaction with the receptacle coupling coil. A testing mechanism is connected to the receptacle for determining whether the code of the SAW device is valid for operation of the motor vehicle.

Abstract: An optical parallel-to-serial converter constructed from at least two optical shift registers coupled in cascade by an optical two-to-one combiner. The input port of the first optical shift register serves as one input to the parallel-to-serial converter, an extra optical combiner optically coupled to the last of said optical shift registers serves as one input port, while the optical combiners coupling said optical shift registers serve as the other input ports receiving parallel optical pulses. The output port of the last of said cascaded optical shift registers serves as the output port of the parallel-to-serial converter. The shift registers are controlled by two clocks, operating at the same rate, but each out of phase with the other, providing control signals to shift and output said optical pulses serially from said shift registers to effect a parallel-to-serial conversion.

Abstract: The present invention is directed to phosphors exhibiting efficient, narrow band UV emission, with peak emission at 330 nm (from excitation at 254). These phosphors are cerium-activated calcium pyrophosphate (beta-phase) of nominal formulationCa(.sub.2-w-x-y) (NSF).sub.w Ce.sub.x Na.sub.y P.sub.2 O.sub.7wherein:NSF is the non-stoicheometric factor;0.ltoreq.w.ltoreq.0.1;0.05.ltoreq.x.ltoreq.0.20; and0.05.ltoreq.y.ltoreq.0.20.

Abstract: This invention relates to abrasion resistant materials and to articles of manufacture made therefrom. More particularly, it is concerned with abrasion resistant materials comprising boron doped TiC or boron doped VC distributed in a matrix containing silicon nitride and with articles made therefrom.

Abstract: A light source including a spiral line pulse generator having an output coupled to one electrode of a high pressure discharge lamp and having an input for coupling to a source of lamp operating power for providing high voltage lamp starting pulses. The pulse generator includes, in addition to a spiral line circuit, a solid state electronic switch for discharging the spiral line pulse generator and a ballast capacitor connected in series with the solid state switch. The spiral line pulse generator preferably has a magnetic core associated therewith for increasing the spiral line inductance.

Abstract: An improved geometry for an optical beam splitter prism permits all input and output beams to be parallel and to remain parallel while the prism is misaligned. It is particularly useful in conjunction with fiber optic couplers and is applicable to splitting with respect to light intensity, polarization or wavelength. This can be achieved through the construction of a beam splitting prism having an additional reflecting surface on one input beam and on one output beam, whereby each of these surfaces are parallel to the beam splitting surface and with two parallel input and output surfaces through which all beams pass so as to make all input and output beams parallel and remain parallel as the prism is translationally or rotationally misaligned about any axis.

Abstract: Digitally encoded voice signals are weighted dynamically in multipliers prior to summation of the digital signals. Greater weight is given to the more active channels. In one system, the signals are weighted proportionately to the square of the amplitude of each digital voice signal.

Abstract: Electrically conductive polymer blends of an acetylene polymer, such as poly(acetylene), and a triblock thermoplastic elastomer, such as styrene-butadiene-styrene, are disclosed. In addition, a method for preparing such blends wherein the acetylene polymer is preferentially formed in the central elastomeric block of the triblock copolymer is disclosed. These blends exhibit high conductivity and elasticity upon doping with electron donors or electron acceptors.

Abstract: Electrically conductive polymer blends of an acetylene polymer and an elastomer having a low level of unsaturation are disclosed herein. The low level of unsaturation provides resistance to heat, light, oxygen and ozone and yet provides sufficient sites for crosslinking of the blend to provide increased stability. These blends exhibit high conductivity upon doping with electron donors or electron acceptors.

Abstract: In a mine tool of the type having a drive body holding a bit, the bit includes forwardly projecting support lands holding a cutting insert wherein the lands have a maximum dimension as measured in a direction perpendicular to a respective side surface of the cutting insert of less than about fifteen percent of the lengthwise dimension of the insert.

Abstract: A gate-source structure and fabrication method for a static induction transistor having improved gain and frequency characteristics and having relatively simple fabrication requirements. The method and the device are embodied by gate regions diffused into the bottom of parallel recessed grooves located in a high resistivity epitaxial semiconductor layer, the surface of the semiconductor layer having a previously diffused source region located between the recessed grooves. The walls of the recessed grooves are covered with silicon dioxide.

Abstract: In a mine tool having a drive body, an insert is detachably held to the drive body in a slot formed by forwardly projecting flanges.

Abstract: A source of visible light including an electrodeless lamp containing a mercury halide. When the contents of the electrodeless lamp are excited by high frequency power, excited mercury (I) halide molecules emit visible light.

Abstract: An electrodeless fluorescent light source including an electrodeless lamp containing a metal iodide or iodine. A fluorescing material is disposed between the electrodeless lamp and an outer envelope. When the contents of the electrodeless lamp are excited by high frequency power, excited iodine atoms emit ultraviolet radiation. The ultraviolet radiation impinges on the fluorescing material causing it to emit visible light. The fluorescing material may be a solid phosphor material on the outer surface of the electrodeless lamp, a solid phosphor material on the inner surface of the outer envelope, a gaseous phosphor material in the space between the electrodeless lamp and the outer envelope, or some combination thereof.

Abstract: In a mine tool of the type having a drive body holding a bit, the bit and drive body include complimentary and mating surfaces wherein one pair of surfaces are adapted to be in overlapping relationship when the bit is twisted in a direction opposite the rotational direction for detachably mounting the bit to the drive body.

Abstract: A source of ultraviolet radiation including an electrodeless lamp containing a metal iodide or iodine. When the contents of the electrodeless lamp are excited by high frequency power, excited iodine atoms emit ultraviolet radiation.

Abstract: A source of visible light including an electrodeless lamp containing a mercury halide, iodine, and nitrogen. When the contents of the electrodeless lamp are excited by high frequency power, visible light is emitted.