摘要:
A first network device is connectable via electrical lines to a power supply and to other subscribers of a network for transmitting audio and/or image information. It has an input terminal connectable to the power supply, an output terminal connectable to a second network device, and signals and operating voltage are transmitted via the terminals using four layers. Equipment processes the signals received via the lines and the operating voltage in the first network device by receiving and/or retrieving or processing information relating to a maximally available PoE supply input on the input and receiving, or retrieving and or processing information relating to a power intake required at least by the second network device received and/or retrieved and/or further processed by the second network device. A tester is connected to the equipment for checking whether the supply input at the input is sufficient for the first and second network devices.
摘要:
A network device for an intercom network for duplex audio communication between users of the intercom network has a housing and a communication module in or at the housing and that can establish a radio link for transmitting audio signals to and receiving audio signals from another user. The radio link is subject to the DECT protocol or another protocol, and the audio signals to the communication module is broken by reflection into a plurality of radio paths. Multipath interference is prevented or reduced by electronic elements including at least one equalizer for processing a plurality of audio signals received along the plurality of radio paths and performing a signal correction.
摘要:
Presented and described is, amongst other items, an intercom plug-in connector (10) for audio connections, comprising a cylindrical housing (19) extending in the axial direction (27), in particular with a circular, or essentially circular, cross-section, whose first axial end (20) is formed by a plug-in extension (22) that on its front face (39) has a plurality of sockets (23a, 23b, 23c, 23d), in particular four sockets positioned relative to one another in an approximately V-shape, for contact pins (24a, 24b), and which at its second axial end (21) has a phone jack (25) for a phone plug (14).
摘要:
A fuel safety valve arranged in a fuel supply line between a low-pressure pump and a high-pressure pump, is provided with a valve body which defines a cylindrical cavity having a longitudinal axis and being connected to a duct and a portion of a discharge duct in communication with the cylindrical cavity, a piston sliding with respect to the valve body in the cylindrical cavity along the longitudinal axis, and a spring housed in a variable-volume chamber defined by a portion of the cylindrical cavity between the piston and a closure element. The piston is provided with a through hole supplied with the fuel leading into the variable-volume chamber, and the valve body being provided with a fuel discharge hole connecting the variable-volume chamber to the discharge duct.
摘要:
Organic dithiopyrophosphates of formula wherein R1, R2, R3, R4 and R5 independently are hydrogen, C1-4 alkyl, chloromethyl or bromomethyl, are prepared in a two-step process from the corresponding 1,3-diols and thiophosphoryl chloride, using 3-methylpyridine both as solvent and as base.
摘要:
An injection system for an internal combustion engine has at least one injector (18) which is coupled hydraulically to a fuel accumulator (16), a prefeed pump (12) for feeding fuel from a fuel tank (10), a high pressure pump (14) which is arranged downstream behind the prefeed pump (12) for feeding the fuel into the fuel accumulator (16), and a line (42) which branches off downstream of the prefeed pump (12) and upstream of the high pressure pump (14) and is coupled hydraulically to an exhaust section injector (47), by way of which fuel can be injected into an exhaust section of the internal combustion engine.
摘要:
A fuel safety valve arranged in a fuel supply line between a low-pressure pump and a high-pressure pump, is provided with a valve body which defines a cylindrical cavity having a longitudinal axis and being connected to a duct and a portion of a discharge duct in communication with the cylindrical cavity, a piston sliding with respect to the valve body in the cylindrical cavity along the longitudinal axis, and a spring housed in a variable-volume chamber defined by a portion of the cylindrical cavity between the piston and a closure element. The piston is provided with a through hole supplied with the fuel leading into the variable-volume chamber, and the valve body being provided with a fuel discharge hole connecting the variable-volume chamber to the discharge duct.
摘要:
The inventive device for cleaning substrates, especially semiconductor wafers, comprises a treatment basin for receiving at least one substrate, a cover for sealing said treatment basin, a first feeding device for controllably feeding in a reactive gas, a second feeding device for controllably feeding in at least one moist fluid for promoting a reaction between the reactive gas and a deposit to be removed from the substrate and a control device for controlling the concentration of moisture in the treatment basin.