摘要:
The invention relates to an internal vibration device having an electrical motor mounted in a vibrating unit housing and having a rotating device comprising an out of-balance mass that is also mounted in the vibrating unit housing. The invention is characterized in that eccentricity of a center of gravity of the out-of-balance mass can be varied relative to the axis of rotation of said out-of-balance mass depending on the direction of rotation of the electrical motor. Said internal vibration device is suitable both for compacting unset concrete and for distributing concrete in the formwork.
摘要:
An aircraft jet engine with a longitudinal axis, including a wall enclosing a gas flow ejected from a downstream end of the wall in the longitudinal axis, plural ducts being distributed around the periphery of the downstream end of the wall each including a terminal section, including an outlet opening. Each duct can eject a fluid jet through the outlet opening thereof. The ducts are configured to eject the fluid jets essentially parallel to each other, each fluid jet ejected through the corresponding outlet opening forming a lateral angle with the longitudinal axis in a projection view in a plane with the longitudinal axis.
摘要:
A connector arrangement comprises a rigid inner conductor (107), a dielectric sleeve (111) arranged around the inner conductor and a rigid outer conductor (109) arranged around the sleeve. A surface of at least one of the inner conductor, the sleeve and the outer conductor is provided with a taper, such that the sleeve fixes the relative transverse positions of the inner and outer conductors at a first end of the arrangement and not at a second end of the arrangement. The inner conductor is longitudinally slidable relative to the outer conductor. Such an arrangement is suitable for use in hostile environments, such as in high temperature pipelines, in which there are large temperature variations and in which the positional variation of mating connectors is high.
摘要:
A surface mount electronic chip (10) is mounted on a holder (70) and electrically connected to holder terminals (74, 76, 80) by the use of a carrier device (30). The carrier device has clips (36) mounted on walls of the carrier frame. The chip is merely pressed into a cavity (48) between inner tabs (44) of the chips. The carrier with the chip in place is merely pressed into a cradle (78) formed in the holder by the holder terminals, so outer tabs (46) of the clips press against the holder terminals.
摘要:
An innovative but easy to use on-line guide is provided to provide the user of a multiple channel television broadcast system a wealth of programming information in a simple format that is easy to understand. The guide enables the user to easily select a particular program to watch. In particular, when the guide is presented to the user, the guide covers only a portion of the actual television screen or display. The remaining portion of the television screen continues to broadcast the audio and video of the currently selected program. As a user scans through the guide and moves the pointer from one station to another, the system responds by automatically tuning to the channel pointed to by the pointer and provides the audio and displays the video in the portion of the screen not covered by the guide. Thus, the user can easily get an idea of the broadcast on a particular station without exiting the guide and without expressly selecting a particular channel. Furthermore, a written description of the program currently broadcasted on a station that the cursor currently points to is also shown. Thus, the user is provided the audio and video of a particular program as well as a written description of the program and the ability to easily preview another station broadcasting another program simply by moving the pointer. Once the user determines that a particular station is to be viewed, the user simply indicates selection by depressing the corresponding key on the receiver or remote control device which then functions to remove the guide. If the viewer exits the guide without selection of a station, the system automatically tunes back to the station that the system was tuned to at the time the guide was entered.
摘要:
An aircraft engine having a longitudinal axis, including a wall surrounding a gas stream that is ejected at a downstream end of the wall along the longitudinal axis, wherein a plurality of conduits distributed at the periphery of the downstream end of the wall are each capable of ejecting, via an outlet orifice, a fluid jet in the form of a sheet, in such a way that the jets thus ejected each form a fluid perturbation around the ejected gas stream.
摘要:
An electrical connecting device for two electrical components which, when assembled, have electrical contact areas facing each other. The electrical connecting device comprises: a plurality of metallic connecting elements, each connecting element having first and second contact portions resiliently compressible against each other; and a flexible dielectric carrier sheet for the connecting elements, a portion of each connecting element being attached to the carrier sheet. Each connecting element comprises a strip of material having a bend at an intermediate portion. In the device, the connecting elements are resiliently compressible against each other, independent of any supporting structure. A rigid supporting structure is accordingly not required.
摘要:
A surface mount electronic chip (10) is mounted on a holder (70) and electrically connected to holder terminals (74,76, 80) by the use of a carrier device (30). The carrier device has clips (36) mounted on walls of the carrier frame. The chip is merely pressed into a cavity (48) between inner tabs (44) of the chips. The carrier with the chip in place is merely pressed into a cradle (78) formed in the holder by the holder terminals, so outer tabs (46) of the clips press against the holder terminals.
摘要:
A coaxial cable connector comprises an injection moulded substrate (79) and a plated conductive pattern formed directly on the substrate, wherein the conductive pattern comprises: a plurality of first tracks (11a) each terminating at one end in a connecting portion (13) for connection to an inner conductor of a coaxial cable and at the other end in a pad (15) for contacting a mating connector; and a plurality of second tracks each terminating at one end in a connecting portion for connection to an outer conductor of a coaxial cable and at the other end in a pad for contacting a mating connector. A PCB connector, comprising a moulded plastics component having spring contacts, mates with the cable connector.
摘要:
A real-time detection technique and a real-time, adaptive, model-independent control technique for detecting and stabilizing pathological physiological rhythms, such as repolarization alternans, on the basis of the rate dependence of excitable tissue such as cardiac and neuronal tissue is presented. Unlike other control methods, which require a number of beats to locate the period-1 fixed point, the technique locates the period-1 fixed point almost instantaneously, rapidly eliminating any higher-period or aperiodic rhythms.