36results about How to "Maintain mechanical stability" patented technology

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

A system for regulating the functioning of an organ or duct generally includes an implantable band structured to at least partially circumscribe an organ or duct and an actuating mechanism operable to effect constriction of the band. The system further includes a plurality of incompressible cushion segments defining a substantially star-shaped inner circumference of the band, the star-shape effective to prevent pinching and necrosis of tissue during adjustment.

Fluid line and method of forming the fluid line. The fluid line includes a cylindrical inner surface having uniformly distributed recesses in the form of spherical sectors formed in the inner surface.

A method of igniting and monitoring a high speed burner (1) with which a fuel / oxygen- mixture exits at high velocity from a burner head (2), wherein the length of the flame is governed by the exit velocity of said mixture. The invention is characterized by placing an electrically conductive pipe (8) in and concentrical with the burner channel (5) for said fuel mixture, by causing a first end (9) of the pipe (8) to terminate close to the fuel mixture outlet (7) of the burner head (2), by electrically isolating (10) the pipe (8) and by causing the detection of light of the group ultraviolet light, visible light and / or infrared light to be detected at the other end (12) of said pipe, and by causing a spark (15) to be generated between the first end (9) of the pipe (8) and the surrounding burner head (2) by application of a voltage, in igniting the burner. The invention also relates to a burner.

The invention relates to a spar cap, a wind turbine blade, and a method for fabrication of both. A spar cap for a wind turbine blade (3), comprising a main body (10), which comprises an electrically conductive portion (11), and at least one metal conductor (13, 28), wherein the metal conductor (13) comprises a terminal portion (15, 26) and at least one connection portion (14), wherein the connection portion (14) of the metal conductor (13) is wrapped by a first end (17) of an electrically conductive and stripe-shaped carbon fibre mat (16), which abuts with a second end (18) at least partly onthe electrically conductive portion (11) of the main body (10).

A bipolar junction transistor (BJT) requires the fabrication of a BJT structure and of a support post which is adjacent to, but physically and electrically isolated from, the BJT structure. The BJT structure includes a semi-insulating substrate, a subcollector, a collector, a base, and an emitter. Metal contacts are formed on the subcollector and emitter to provide collector and emitter terminals. Contact to the structure's base is accomplished with a metal contact which extends from the top of the support post to the edge of the base nearest the support post. The contact bridges the physical and electrical separation between the support post and the base and provides a base terminal for the device. The base contact need extend over the edge of the base by no more than the transfer length associated with the fabrication process. This results in the smaller base contact area over the collector than would otherwise be necessary, and a consequent reduction in base-collector capacitance. The invention is particularly useful when forming heterojunction bipolar transistors (HBTs), built on a compound semiconductor substrate such as indium phosphide (InP).

The exchanger i.e. plate-type heat exchanger (1), has a set of rectangular separating plates arranged at a distance from each other in a stack form, so that passages are formed between the separating plates. The passages are limited at two sides by spacers e.g. side bars. Soldering agent is applied at contact points between the separating plates and the side bars. The sidebars are soldered to a block (2). Headers (5a, 5b) are welded to an intermediate piece (3) e.g. framework, which is previously soldered to the block. The block is closed with a cover plate.

A rechargeable battery pack includes at least one individual cell which is accommodated in a cell holder and is in electrical contact on a contact side via a cell connector. An electric load is to be connected via a contact plate which has a plurality of plug-type connections, wherein the contact plate is located on one side face of the cell holder. In order to compensate positional tolerances between the plug-type connections of the contact plate and external connection contacts, a mount for the contact plate is provided on one side face of the cell holder, in which mount the contact plate is mounted so as to be displaceable in a displacement direction. The electrical connection between the individual cell and the contact plate is embodied by an elastic contact strip, wherein the contact strip is embodied so as to be resilient in a sprung fashion in the displacement direction of the contact plate.