Showing papers on "Coupling published in 1969"

Coupling Operator Method in the SCF Theory

Abstract: The coupling operator method in the general SCF theory is discussed. It is shown that there is an abritrariness in the definition of the general SCF operators. In the course of discussion, several SCF equations useful in practical applications are presented.

Radiation and near-field coupling between two collinear open-ended waveguides

Abstract: An experimental and theoretical study of closely spaced collinear coupled waveguides radiating through a common perfectly conducting ground plane is described. The problem is formulated as a set of simultaneous integral equations and solved approximately by expanding the aperture field in a Fourier series. The special case of a single isolated waveguide is treated first, and the results are compared with experiment as well as with the approximate results of Lewin. Attention is given to the edge singularities. The more general case of two collinear coupled waveguide slots is solved by the same numerical method using the symmetrical properties of the geometry. Phase and amplitude of the mutual coupling are evaluated and compared with experiment. Agreement is excellent.

Light wave coupling into thin films

Abstract: Coupling of light waves through a major surface of a thin film for propagation therein is achieved by means of a distributed action of the evanescent field of a light wave in an internalreflection prism disposed so close to the film that internal reflection is partially frustrated. Phase-matching of the evanescent wave and the wave propagating in the thin film is obtained by directing the input light beam at the proper angle within the prism toward the internal reflection surface and by providing appropriate indices of refraction of the components. Light-utilizing integrated circuits, including dielectric waveguides, modulators, parametric devices and amplifiers are provided with input and output coupling in this fashion. Systems employing directional coupling and channel dropping and adding are also disclosed.

Coupling arrangement for thin-film optical devices

Abstract: A coupling arrangement for thin-film optical devices is disclosed which couples a laser beam into or out of a thin-film light guide with high efficiency. The coupling between the thinfilm guide and its bulk substrate is provided by an auxiliary film of low refractive index whose thickness is smoothly increased throughout the coupling region so that, for input coupling, the competing output coupling effect is minimized. In a preferred embodiment, the thickness of the thin-film guide itself is also increased beyond the coupling region. This permits then the thickness of the auxiliary coupling film to be tapered off, eventually to zero thickness, in the region of increased guide thickness.

Variable torque transmission

Abstract: Apparatus for a four or six wheel drive motor vehicle which includes a variable ratio torque transmission assembly connected by drive shafts to front and rear axles. The variable ratio torque transmission assembly has a rotary input member which receives torque from the engine, and first and second rotary output members connected to the front and rear axles respectively. The output members are coupled together by a hydraulic torque transmitting mechanism which includes means for selectively setting the ratio of the input torque that is transmitted to the two output members and thereby to the front and rear axles. This arrangement permits any desired ratio of torque transmission, such as one-third of the torque being transmitted to the front axle and two-thirds of the torque being transmitted to the rear axle. The assembly also includes a remote control means whereby the driver of the vehicle can lock the mechanism between the two output members so that full or maximum torque is transmitted to the front axle.

A new determination of the π N coupling constant f 2

Abstract: The coupling constantf2 has been determined from forward dispersion relations for theπN helicity flip and no-flip amplitudes, using the recent information on total cross sections, phase shifts and charge exchange forward cross sections. The calculation gives also the values of the amplitudes and the first derivative at the crossing symmetry point.

Fluid actuated and lubricated clutch with splined release springs

Abstract: A stack of coupling disks for frictionally clutching relatively rotatable shafts has interleaved convoluted springs splined to the shafts for clutch release. The disks are subjected to fluid pressure through a needle bearing from a relatively fixed ram. A separate source of liquid is conducted from a fixed portion of the ram into one of the relatively movable clutch parts and fed to various disks of the stack.

Selector mechanisms for change-speed gears

Abstract: A SELECTOR MECHANISM FOR A CHANGE-SPEED GEAR, PRIMARILY FOR USE IN MOTOR VEHICLES, INCLUDES SELECTIVELY MOVABLE STRIKER FORKS, OR OTHER STRIKER MEMBERS, WHICH ARE SLIDABLY MOUNTED ON A STRIKER SHAFT THAT IS MOUNTED AT ONE END IN A FIRST WALL OF THE GEAR HOUSING. THE STRIKER MEMBERS CO-OPERATE WITH CLUTCH COUPLING SLEEVES OR OTHER COUPLING MEMBERS OF THE CHANGE-SPEED GEAR. ONE OF THE COUPLING MEMBERS, FOR AN AUXILIARY GEARSET WHICH MAY FOR INSTANCE BE ARRANGED TO GIVE AN OVERDRIVE RATIO, IS DISPOSED ON THE SIDE OF A SECOND WALL OF THE GEAR HOUSING REMOTE FROM THE OTHER COUPLING MEMBERS: THE STRIKER MEMBER FOR THE COUPLING MEMBER OF THE AUXILIARY GEARSET HAS A TUBULAR BOSS PORTION WHICH EXTENDS THROUGH, AND IS SLIDABLE IN, AN APERTURE IN THE SECOND WALL SO AS TO FORM A MOUNTING SUPPORT FOR THE STRIKER SHAFT RELATIVE TO THE SECOND WALL. WITH THIS ARRANGEMENT, ALSO, SELECTOR PORTIONS OF THE VARIOUS STRIKER MEMBERS MAY BE GROUPED CLOSELY TOGETHER, FOR EXAMPLE IN TWO OR POSSIBLY ONLY ONE COMMON RADICALPLANE REGIONS, TO FACILITATE SELECTION BY A SINGLE SELECTOR SHAFT, POSSIBLY WITH AN ASSOCIATED INTERLOCK MEMBER.

On the kinetic equation for resonant three-wave coupling

Abstract: Exact solution to kinetic equation for resonant three wave coupling in weakly turbulent plasmas, assuming only single triplet of modes interaction

Application of the multi-configuration Hartree-Fock theory to a simple model

Abstract: The Lipkin model is extended to yield a non-trivial Hartree-Fock (HF) solution for any coupling constant of the two-body force In this model the multi-configuration Hartree-Fock (MCHF) approach is compared with the exact solution and with the HF solution The results show a strong superiority of the MCHF method over the HF approximation

Yig-tuned solid state oscillator

Abstract: An output coupling loop and a tuning loop are supported about a common axis and spaced-apart in parallel planes orthogonally intersecting the common axis. These loops are magnetically coupled by a YIG sphere supported along the common axis with its center positioned between the parallel planes. The output coupling loop is electrically connected by a matched transmission line across a matched load, and the tuning loop (either alone or in combination with a series gap capacitance) is electrically connected by a pair of parallel-connected bypass capacitors across a bulk-oscillating device. One of these bypass capacitors and the bulk-oscillating device are supported on a heat sink in a plane parallel to the common axis and orthogonal to the parallel planes. Both loops, the YIG sphere, and the bulk-oscillating device are mounted in the gap between the poles of a closed loop electromagnet.

Screw pump provided with a radially movable rotor coupling

Abstract: THERE IS PROVIDED A NOVEL TYPE OF COUPLING FOR USE IN HELICAL PUMPS OF THE TYPE WHICH COMPRISE A SINGLE ROTOR COACTING WITH AND ECCENTRICALLY ROTATING IN RELATION TO A FIXED STATOR, THE NOVEL COUPLING COMPRISING AN INTERMEDIATE CONNECTOR MEMBER WHICH BRIDGES THE INPUT AND OUTPUT MEMBERS OF THE COUPLING TO TRANSMIT TORQUE, AND ONLY TORQUE, THEREBETWEEN, THE CONNECTOR MEMBER BEING ESPECIALLY ADAPTED TO PERMIT THE USE OF VARIOUS ARBITRARY MEANS FOR ABSORBING AXIAL FORCES OCCURRING IN THE COUPLING.

Sound reproducing system

Abstract: A dynamical system for the reproduction of sound The system includes a relatively small enclosure with a driven loudspeaker cone and one or more free pistons suspended in airtight fashion in openings in the enclosure A rigid shell having an opening juxtapositioned to the driven cone, may surround the enclosure, for purposes of increasing the coupling among free pistons and between free pistons and the driven cone

Safety device for motor vehicle door locks

Abstract: A SAFETY DEVICE FOR THE DOOR LOCKS OF MOTOR VEHICLES HAVING AN INSIDE OPERATING LEVEL WITH A SAFETY BUTTON MOUNTED ADJACENT AND TOGETHER WITH THE OPERATING LEVER AND WITH THE OPERATING ROD AND COUPLING MEANS FOR THE SAFETY BUTTON WITH AN INTERMEDIATE SHAFT WHICH EXTENDS BEHIND THE OPERATING LEVER.

Numerical Solutions for the Coupling Between Waveguides in Finite Arrays

Abstract: Mutual coupling between the waveguides in finite arrays has been analyzed by using the integral equation method. Numerical solutions are obtained from which we find that the coupling in general decreases with the wavelength, as well as the distance s between the waveguides, and that for large separations the rate of decrease is inversely proportional to s½. However, when the waveguides are loaded with dielectric plugs, the characteristics of coupling may be substantially changed, owing to the excitation of modes that are propagating inside the dielectric but evanescent in the empty waveguide region. For example, the coupling may be greatly enhanced or suppressed depending on the choice of parameters such as the dielectric constant and plug thickness. In particular, it is found that under suitable conditions the coupling can exhibit resonance characteristics.

Vacuum torque actuator

Abstract: IN PREFERRED FORM, A VACUUM-POWERED TORQUE ACTUATOR HAVING A PLASTIC PIE-SHAPED BELLOWS. THE BELLOWS CONTRACTS TO PIVOT AN ATTACHED MEMBER WHEN ITS AIR-FILLED INTERIOR IS EVACUATED. RESULTANTLY AN AIR DAMPER CONNECTED TO THE MEMBER IS POSITIONED IN AN AIR DUCT TO REGULATE AIRFLOW.

Finite-element coupling matrices

Abstract: Finite-element coupling matrices are given for hybrid-mode problems in waveguide structures. The matrices refer to Nth-order polynomial expansions of the field, where N = 1, 2, 3, 4 and are antisymmetric and independent of the shape of the element triangle.

Web winding apparatus

Abstract: A web-winding system is disclosed as employing clutches so ganged on a common drive that wide webs may be wound simultaneously with, and to the same tightness as, narrower webs. The coupling of each such clutch is controlled by a computer which operates by maintaining constant the total end face area of the supply and rewind rolls. The drive speed is also computercontrolled to minimize the heat-producing slippage within such clutches.

Platform knife-cutting angle adjustment

Abstract: A quick detachable apparatus for connecting a harvesting platform to its feeder housing at various angles thereto. The location of the upper coupling element carried by the feeder housing is adjustable about an underlying axis and the arcuate abutting surfaces of the lower coupling are generated about this same axis. Thus regardless of the location of the upper coupler, the abutting surfaces of the lower coupler are always aligned.

The reaction e+e−→π0+ω(π+π−π0) and the ω-ρ-π coupling

Abstract: This reaction is shown to be particularly interesting for the determination of the ω-ρ-π coupling parameters (coupling constant and off-mass-shell dependence). Predictions are given for the total cross-section, (π+π−π0) mass distribution and ω density matrix.

Limited torque coupling

Abstract: A torque coupling having its capacity limited by the torque and the speed includes a hollow cylinder having plate links which form an apex which may extend toward the rotary coupling part or outwardly therefrom, the rotary coupling part having concave and convex surfaces for receiving the apex of the plate links with the plate links being supported by U-shpad springs and the apex formed by the plate links being urged inwardly by a spring reacting against a weight engaging the apex of the plate links so that spring pressure normally produces the driving action between the hollow cylinder and the rotary coupling part while the weights are urged outwardly by centrifugal force to limit the speed at which the coupling maintains a driving relation. The concave-convex surfaces may be rounded about centers transverse to the input and output axes to permit angular relation without stress.