Abstract: A loading apparatus for a video tape recorder includes a loading arm, a chassis formed with a pair of guide holes and, a pair of loading set members for setting a tape to a loading position which are guided by the pair of guide holes. In the loading apparatus, a single loading arm is provided. The pair of loading set members are reciprocatingly moved through a pair of connection plates.

Abstract: The present invention is a moisture-insensitive system adapted to couple radio frequency energy at a low impedance from a matched two conductor transmission line, through a vehicle windshield and to an antenna in a manner which minimizes stray radio frequency radiation within the passenger compartment of the vehicle. The system includes two pair of conducting plates, one pair mounted on each side of the windshield, each pair opposite the other pair. A coaxial feed line is coupled to the inside pair of plates and a matching circuit is connected across the outside pair of plates. A full-size, unloaded antenna element is connected to the output of the matching circuit. A decoupling device, such as a decoupling sleeve or a RF choke, can be used to minimize RF current flow on the shield conductor of the coaxial feed line. The coaxial cable is coupled directly through the windshield, without an intervening matching network, so that RF energy at a low impedance is coupled to the outside pair of plates.

Abstract: Amplifier for radio frequencies including first and second common-base-connected transistors in push-pull coupling; an input transformer including two identical input windings each in series connection with the emitter of the respective first and second transistor and an input signal; an output transformer having a primary winding divided by a centertap into two identical half windings and having a start and an end terminal respectively connected to the collector of said first and second transistor and being connected to a supply potential at the centertap. The output transformer further includes a secondary winding connected to a load and identical first and second feedback windings in series connection with the respective emitter of said first and second transistor. Each feedback winding is such oriented that a fraction of the output signal is inserted in the input signal in opposite phase thereto for providing negative feedback.

Abstract: There is disclosed a polyphase power line adapter for providing polyphase electric power to operate a motor at a speed less than rated speed particularly useful for pump motors and the like where it is undesirable to stop the motor. A bridge of from nine to eighteen thyristors, which is also conventially used in cycloconverters, connects the input terminals to the output terminals. A delta-to-Y transformer arrangement and a wave shaping circuit produces cyclic pulse control signals synchronized with the wave-forms of the respective phases of the polyphase power line input; one such signal is transmitted to a divider circuit with a maximum division factor (always an integer) corresponding to the factor, N, by which the frequency, and hence, motor speed is to be reduced. A plurality of logical "and" circuits each has its inputs connected to receive one output from the divider circuit and cyclic pulse control signals are supplied to another of the inputs.

Abstract: A removable rod antenna comprises a first fitting for rigidly coupling to a radio body; an elongate rod-like antenna body; a second fitting of complementary configuration for engaging the first fitting, and a retaining arrangement for holding the second fitting in captive relation on the antenna. Respective mating fastener portions are defined respectively on the first and second fittings for removably engaging each other in electrically conductive contact to thereby removably mount the antenna body to the radio body in electrically conductive contact with the first fitting thereon.

Abstract: Digital apparatus for generating a continuous signal waveform of a given carrier frequency fc. The apparatus comprises address circuit for generating repetitively a set of Z address signals and a memory in the form of a ROM for storing a set of Z digital values. The Z digital values define M number of cycles of the signal waveform, where M is a whole number. Each cycle of the signal waveform is defined by at least Y digital values, where Y is greater than 2. The carrier frequency fc is equal to the product of Y and M. The ROM is responsive to the address signals for repetitively reading out frm the ROM the Z digital values, whereby the continuous signal waveform is generated without discontinuity.

Abstract: In a pseudo-random communication system, a transmitter-generated encoded signal is to be correlated with a receiver-generated similarly encoded signal for recognizing synchronization of the transmitted and received signals in the presence of undesired received energy. The system comprises a spread-spectrum transmitter including at least two pseudo-noise generators for producing at least two pseudo-noise signals which are related in a predetermined fashion, a mixer for receiving and mixing the two pseudo-noise signals with respective carrier and information signals to produce an output signal, and apparatus for transmitting the output signal. The system also includes a spread-spectrum receiver comprising a correlator and a matched filter coupled in circuit to form a synchronization detector circuit for receiving and detecting the encoded output signal transmitted by the transmitter so as to recover the information therefrom.

Abstract: A channel electron multiplier having a semiconductive secondary emissive coating on the walls of said channel wherein said electron multiplier is a monolithic ceramic body and said channel therein preferably is three dimensional.

Abstract: A variable frequency DC to DC converter generates a pulsed, variable magnitude output voltage where the frequency of the pulsed output voltage varies with changes in the magnitude of the output voltage. An energy storage capacitor is coupled between the converter coupled inductor and strobe flash lamp or other gaseous discharge tube and is periodically discharged through the flash lamp. A variable impedance device in the form of a capacitor is coupled in series with the flow of current from the coupled inductor into the energy storage capacitor to provide a low impedance current flow path when energy is transferred from the coupled inductor into the capacitor and to provide a high impedance current flow path between the converter DC voltage input terminals and the energy storage capacitor when energy is transferred from the capacitor into the strobe flash lamp.

Abstract: An improved automatic train-line air brake pressure monitoring system includes circuits that emulate an automatic brake valve and cause an automatic brake manifold release whenever a four psi increase in pressure is sensed. The system includes a pressure sensor amplifier (10) which provides a signal proportional to the sensed pressure in a brake pipe. This signal is tracked by a peak hold circuit (12) that stores the peak value of the signal. The output of the sensor amplifier is subtracted from the output of the peak hold circuit in a subtractor (14) to provide a difference signal. The difference signal is tracked by a reduction hold circuit (22) which stores the minimum value of the difference output from the subtractor. An increase in measured pressure from the stored minimum value is compared in a comparator (24) with a reference value representing the four psi level, and when the increased pressure exceeds the reference value, a system reset is generated.

Abstract: The clipping suppression arrangement for a compandorized communication system, includes a limiter peak level detector for causing the gain of an input amplifier to be reduced quickly when a compressed output is driven toward a clipping output condition.

Abstract: Apparatus for detecting contaminants, including emboli, in a blood sample prior to blood cell analysis, wherein fluid density sensors are arranged on opposite sides of a fluid segmenting valve to provide electrical signals indicative of the degree of optical opacity of the fluid flowing through the sensors. The derived signals are compared against a diluent reference level signal to provide resultant signal outputs indicating the presence or absence of emboili or other contaminants within the segmented portion of fluid.

Abstract: A recorder-reproducer includes a rotary head cylinder against which a tape from a tape cassette is slidable, a pair of movable bodies for moving the tape in directions toward and away from the rotary head cylinder, a pair of connectors having ends angularly movably coupled to the movable bodies, respectively, and a sole rotatable body to which opposite ends of the connectors are angularly movably coupled, the rotatable body being rotatable for loading the tape against the rotary head cylinder and unloading the tape away from the rotary head cylinder. The recorder-reproducer also includes a holder for holding the tape cassette therein, a pair of arms movably disposed in the holder for gripping the tape cassette therebetween, and an arm drive means for bringing the arms into and out of the holder.

Abstract: A low height-profile rotary optical encoder having an improved coupling structure for coupling the code disc to the shaft for which positional information is desired wherein the coupling structure includes a coupling member having a shaft portion and an integral flexible coupling portion, a bearing structure for rotatably supporting the shaft portion within the encoder, the bearing structure and shaft portion each having a length which is substantially equal to one another, and the height of the encoder optics can be greater than the height of the bearing structure, and a base which is adapted to support the bearing structure, the shaft portion of the coupling member and the encoder optics in a common transverse section of the encoder and to house the flexible coupling portion of the coupling member wholly within the base.

Abstract: A driving mechanism of a cassette tape recorder, for inserting and ejecting a tape cassette and loading and unloading the tape of an inserted tape cassette. The driving mechanism comprises a positive motion cam having a cam groove consisting of two grooves having the shapes of circular arcs of different radiuses and different arc lengths, respectively, and a connecting groove interconnecting the two grooves, two followers suitably associated with the positive motion cam, two lever systems operatively interlocked with the two followers, respectively, and a single reversible motor interlocked with the positive motion cam. The operation of the reversible motor in the normal direction achieves a tape cassette inserting operation and a tape loading operation sequentially through the positive motion cam and the two lever systems.

Abstract: N stages of BCD adders receive as a first addend BCD encoded information representing a desired frequency. They receive as a second addend the outputs of N stages of four-bit registers. The summing outputs of the adders are input data for the registers. The data is clocked into the register by a stable frequency source. The outputs from a plurality of the most significant stages of the registers are used to address a ROM. Using the periodically changing BCD address, a sinusoidal function is retrieved in individual samples from the ROM. Digital data from the ROM is converted to analog. A low pass filter enhances the desired frequency and suitably attenuates higher frequencies. An equalizer compensates for power roll-off.

Abstract: A band clamp having an integral buckle includes an elongated band; a buckle member at one end of the band and having a base in the plane of the band, side portions and a top portion connecting the side portions forming a loop for retaining one or more passes of the band; and a tongue member extending in the plane of the base opposite the band, a pair of notches extending into the base at the sides of the tongue. When tension is applied the band with the band extending through the buckle and enclosing the sleeve, the tongue member is deflected toward the sleeve by the band for permanently deforming the base and portions of the sides of the buckle in conformity with the sleeve when the sleeve has an equivalent diameter of less than about 20 times the thickness of the band.

Abstract: A single-wire loop alarm system in which an identification module is placed across each alarm switch. Any module which is across an open switch is powered by the loop current and, in response to a pulse count in the loop representing its address, changes the loop impedance in order to report on its status. The loop current may alternate in direction so that oppositely poled modules may be used, thus allowing a larger number of powered modules to accommodated at the same time.

Abstract: This invention describes a reagent system, including saponin in a lysing reagent and a rapidly active cross-linking agent such as glutaraldehyde as a fixing reagent, which reproducably affects whole blood to cause the red blood cells to stromatolyze and modifies the leukocytes to generate data to define four distinct clusters for detection and classification by flow analysis instrumentation. The clusters represent the four major leukocyte types found in blood: lymphocytes, monocytes, neutrophils and eosinophils, thus providing a method of leukocyte differential analysis. The parameters used for the leukocyte classification include combinations of two or more of DC (Coulter) volume, high frequency (RF) size, opacity (RF size/DC volume), light scatter at various angular ranges, and fluorescence at various wavelengths of illumination.