Showing papers on "Stub (electronics) published in 1974"

Tubing connector apparatus and method

Abstract: A tubing connector having two couplings, each coupling including a central stub tube and a spaced, concentric housing. Each coupling is adapted to be placed on a tubing end with each stub tube in fluid communication therewith. The couplings join to form the connector while the stub tubes telescopically mate to provide fluid communication through the connector and the housings telescopically mate to isolate the mated stub tubes in a spaced enclosure. Each coupling is provided with a closure which includes a cap and a stopper. The stopper seals the stub tube while the cap telescopically mates with the housing to isolate the sealed stub tube in a spaced enclosure. The closures are dimensionally configurated to mate while the couplings are mated to form the connector.

Design and Analysis of a Waveguide-Sandwich Microwave Filter (Short Papers)

Abstract: In 1972 Konishi proposed a unique waveguide filter of sandwich-like construction that was attractive because of its simplicity This short paper presents an analysis of the sandwich filter that has a conductive sheet with finite thickness sandwiched between waveguide shells An equivalent circuit is derived, design charts are proposed, and Young's technique is applied to the design of an M-band waveguide filter The experimental results were found to be in good agreement with the theory and analysis techniques developed herein

Four pinion differential

Abstract: A four pinion differential with a one-piece housing and a differential lock to lock the differential for synchronous rotation of the side gears or differential rotation of the side gears. The pinion gears of the differential are mounted on a cross shaft and a pair of stub shafts which are retained in nonrotating position by a locking bolt extending through the stub shafts to lock the stub shafts in recesses on the cross shaft.

Tuning structures for microstrip transmission lines

Abstract: Two embodiments are disclosed to tune microstrip transmission lines. One embodiment includes a stub strip conductor disposed on the microstrip transmission line substrate at right angles with respect to and spaced from the strip conductor of the microstrip transmission line and a tuning member at right angles to the substrate disposed over the gap between the stub strip conductor and the strip conductor. When the distance of the tuning member above the substrate is varied the shunt impedance of the microstrip transmission is varied. The other embodiment includes a tuning member threaded in a hole through the carrier of the microstrip transmission line with the metallization removed from the ground plane of the microstrip transmission line immediately above the hole. The inward and outward movement of the tuning member provides a variable series impedance for the microstrip transmission line.

Multi-mode microwave cavity feed system

Abstract: A feed port arrangement for a multi-mode cavity is described. Such arrangement includes a plurality of waveguide extensions which project into the interior of the cavity. Each of such extensions includes an elbow within the interior of the cavity which angles an end stub on the extension obliquely with respect to the portion of such extension extending through the cavity wall. Each of the feed ports further includes an adjustable impedance matching iris at the free end of the waveguide extension for coupling energy from the extension into the multimode cavity.

Surgical needle roller - mounted releasably in holder for quick sterilising

Abstract: Surgical needle roller is mounted releasably and rotatably on a holder which is provided with a curved cover for supporting the roller out of contact with ambient objects when not in use Pref the holder has co-axial integral stub shafts which journal the roller, the stub shafts forming a continuation of a yoke

Turbomolecular vacuum pump having a gas bearing-supported rotor

Abstract: A turbomolecular vacuum pump has a stator, a rotor having a vertical axis of rotation and disposed in the stator; a drive motor for rotating the rotor; a downwardly open, axially extending chamber in the rotor; a vertically upwardly oriented, stationarily supported stub shaft projecting into the rotor chamber; and axial, as well as radial gas bearings disposed within the rotor chamber for generating gas cushions between the rotor and the stub shaft.

Microwave bandpass filter

Abstract: Microwave filter of strip transmission line structure. It comprises a main rectilinear strip conductor and a plurality of open-ended strip line stubs all having one half wave length at the mid frequency of the filter and parallel-connected to the main strip conductor. The connecting points are regularly spaced apart along the main strip conductor and, on each strip line stub, they are selectively offset with respect to the midpoint of the stub.

Cooled seal cartridge

Abstract: A mechanical seal cartridge applicable for a pump-motor combination which cartridge has a stub shaft adapted to be connected at one end to the motor shaft and at the other end to the pump shaft and which is enclosed in a housing located between the motor and the pump, the housing having an opening permitting access to the cartridge whereby it may be replaced as a unit.

Superconductive microwave filter

Abstract: Microwave filter of strip transmission line structure. It comprises a main rectilinear strip conductor and a plurality of open-ended strip line stubs all having one half wave length at the mid frequency of the filter and parallel-connected to the main strip conductor. The connecting points are regularly spaced apart along the main strip conductor and, on each strip line stub, they are selectively offset with respect to the midpoint of the stub.

Passive microwave power distribution systems

Abstract: A standby microwave transmitter power amplifier tube is switched into a microwave power distribution system for a phased array in microseconds when any transmitter tube feeding any one of the radiating elements falls and all the radiating elements continue to be fed by respective transmitter tubes after the switching is completed, the switching being accomplished by changing electrical length of a quarter-wavelength waveguide stub to one-half wavelength by switching a reciprocal latching ferrite phase shifter in the stub, in response to termination of microwave power from one of the feed tubes.

Broadband quarter-wave plate assembly

Abstract: A broadband quarter-wave plate having a minimum axial ratio over an octave bandwidth comprises a waveguide transmission line having a tapered dielectric slab and a plurality of longitudinally spaced pairs of rectangular waveguide stubs connected to the line in alignment with the undelayed component (EN) of the spatially orthogonal linearly polarized waves comprising the principal electromagnetic wave propagating in the transmission line. Each stub is oriented with the longer of its cross-sectional dimensions extending transversely of the direction of propagation of the wave in the main line and the stubs comprising each pair are diametrically opposed to each other. The transmission line to which the waveguide stubs are connected preferably is square waveguide although circular waveguide may also be used with advantage. The stubs are perpendicular to the axis of the line or alternatively may be folded to conserve space. The primary phase changing element, preferably a linearly tapered or step-tapered dielectric slab, is mounted in the line adjacent to the stubs for longitudinal compactness of the assembly. The relatively small waveguide stub is the electrical equivalent of a frequency independent lumped inductance having utility in other waveguide circuits such as diplexers and filters employing a series inductance element as part of the waveguide circuit.

Cigarette with a snuffer

Abstract: A cigarette in combination with a snuffer wherein according to the invention the cigarette is provided with an extinguishing sleeve of incombustibilized paper or incombustible material such as aluminum foil so that a smoker can extinguish the remaining stub by wrapping it up with said sleeve, or by drawing the stub out of a cylindrical cavity formed within said extinguishing sleeve and thereafter thrusting the lit portion of said stub into said cylindrical cavity.

Signal dividing or combining network - uses stud lines tuned to quarter wavelength or odd multiple of quarter wavelength

Abstract: The device is used for dividing up signal energy derived from a voltage source with n outputs, or it may be used for blending signals from n sources into a single line. Lengths of conductor (WL1, WL2) connected in parallel are used and they have an electrical length of one quarter of the wavelength at the frequency being used, or an odd multiple of this. One end of each of these lines are brought together onto a single terminal (E) and the other ends may be short circuited together via resistors. Stub lines (Wk1, Wk2) are connected either to the short circuiting terminals (A1, A2) or the terminal (E) and their other ends are earthed. The system may be produced as a printed circuit.

Compact mounting for wiper blade on wiper arm - is made with end of arm turned through 90 degrees and fitted with wiper support stub

Abstract: The end of the flat wiper arm (10) on a motor vehicle is twisted through 90 deg to form a flat mounting surface for attaching the support stub (19) on which the wiper blade is pivoted, about an axis parallel to the windscreen The wiper support stub is secured to the end of the wiper arm by rivetting it through a hole (13) in the arm The stub has a reduced profiled section (17) over which the wiper is fitted and located The whole assembly is light, simple and compact, and it produces a minimum of wind resistance

Knife operating device for sewing machines

Abstract: A knife operating device for sewing machines includes a needle stub pivotally mounted to the front part of a rocking arm. The rocking arm intersects with a needle stub guiding bar and is pivotally mounted and its rear end. A knife holder is, also, connected to the rocking arm and is guided so as to be movable with the needle stub.

Vehicle steering column

Abstract: A steering column for a vehicle comprises two rotatable stub shafts coupled to a steering wheel for the vehicle and a steering gear for the vehicle, respectively. A rotatable steering shaft extends between the two stub shafts and couplings connect opposite ends of the steering shaft to different ones of the two stub shafts. At least one of the couplings is relatively torsion-stiff and couples the steering shaft to one of the stub shafts so as to define an angle between the shafts. The coupling includes at least two portions that are fabricated of metal plate. The two portions of the coupling are coupled together and are oriented transversely of each other. One of the portions of the coupling is rigidly connected to an end of the steering shaft and the other is rigidly connected to an end of the one stub shaft.

A modified specimen stub for the scanning electron microscope

Abstract: SUMMARY The standard ‘Stereoscan’ specimen stub has been modified to permit palynological acid-maceration techniques to be performed under aseptic conditions. It is hoped that this adaptation will also be of use where contaminant-free pure culture preparations are required, where delicate specimens are being treated, or where it is desirable to examine the precipitated products of chemical reactions.

A Study of the Transmission Line Properties of Trapped Inverted Microstrip Line.

Abstract: : Trapped Inverted Microstrip, or TIM, line is a novel transmission line invented for the purpose of reducing the radiation from discontinuities and obtaining reduced line loss compared to conventional microstrip. TIM line also possesses several other useful features and is potentially an attractive transmission line medium for the microwave integrated circuit (MIC) technology. The objective of the study was to determine TIM line's basic transmission line properties and to provide basic design data. The scope included the line impedance and effective dielectric constant as functions of the geometrical parameters, and the characterization of simple discontinuities such as stub junctions, series gaps, impedance steps and mitre bends. It also included the design of a well-matched broad band transition from coaxial line to TIM line. The data generated was also applied to the design of a 3dB branch line hybrid coupler.

Millimeter wave pumped parametric amplifier

Abstract: A millimeter wave parametric amplifier structure and varactor diode mounting structure therefor includes a housing within which is a pump frequency waveguiding channel and an intersecting signal frequency transmission line. The transmission line has a center conductor portion which protrudes into the pump channel. A portion of the housing forms the outer conductor of the transmission line. A pair of uncased varactor diode chips within the channel are stacked and connected in series across the wave guiding channel and are connected in parallel with respect to the inner and outer conductors of the signal transmission line. An adjustable stub means protrudes into the waveguiding channel adjacent the stacked varactor diode chips and defines a capacitive gap across the channel for series resonating the diode chips at an idler frequency. The stub means is located close to the stacked diode chips to provide a short return path for idler current generated by the diodes. The diodes, the stub means and the protruding portion of the center conductor are carried by a thin conducting wafer removably retained by the housing.