摘要:
The invention relates to a device for scanning the division mark of a mechanical roller-type counter (1), for any type of counter, comprising a number of rotatably driven ciphering rollers (2), each ciphering roller carrying a number of digits (3) or symbols that are distributed homogeneously over the circumference and can be detected and evaluated with a fixed reading device arranged opposite. Said device is characterised in that at least one transponder (6) is associated with each digit (3) or each symbol in the respective ciphering roller (2) of the roller-type counter (1). An RFID antenna field (15) is located opposite the transponder, at a small distance therefrom, said field being controlled by a circuit in such a way that a ciphering roller of the roller-type counter (1) can be read respectively by an antenna (16, 17, 18) of the RFID antenna field (15).
摘要:
The invention relates to a device for scanning the division mark of a mechanical roller-type counter (1), for any type of counter, comprising a number of rotatably driven ciphering rollers (2), each ciphering roller carrying a number of digits (3) or symbols that are distributed homogeneously over the circumference and can be detected and evaluated with a fixed reading device arranged opposite. Said device is characterized in that at least one transponder (6) is associated with each digit (3) or each symbol in the respective ciphering roller (2) of the roller-type counter (1). An RFID antenna field (15) is located opposite the transponder, at a small distance therefrom, said field being controlled by a circuit in such a way that a ciphering roller of the roller-type counter (1) can be read respectively by an antenna (16, 17, 18) of the RFID antenna field (15).
摘要:
A method for operating a wave energy converter for converting energy from a wave movement of a fluid into a different form of energy. The wave energy converter including at least one rotor and at least one energy converter coupled to the at least one rotor. A first torque acting on the at least one rotor is generated by the movement of the waves and a second torque acting on the at least one rotor is generated by the at least one energy converter. A desired effective force acting perpendicular to an axis of rotation of the at least one rotor is set by setting the first and/or second torque.
摘要:
The invention relates to a process for preparing a (meth)acrylate copolymer containing quaternary ammonium groups from a monomer mixture selected from: (a) 80 to 99% by weight of a C1-C4-alkyl ester of acrylic acid or methacrylic acid; and (b) 20 to 1% by weight of an alkyl ester of acrylic acid or methacrylic acid with a quaternary ammonium group in the alkyl radical; and (c) 0 to 10% of further copolymerizable vinyl monomers whereby one or more polymerization initiators, optionally one or more molecular weight regulators and one or more solvents or of a solvent mixture are added to the monomer mixture to give a polymerization mixture, which is polymerized at temperatures from 30 to 120 C over a period of 2 to 24 hours, where the polymerization mixture is polymerized to a polymerization syrup with a conversion of the monomers to the copolymer of at least 99% by weight, where the polymerization syrup is subsequently degassed by distillation or by extrusion and the degassed polymerization syrup is further comminuted to a copolymer preparation in the form of a granulate or powder and where the copolymer preparation is characterized by a molecular weight (Mw) of 25.000 to 50.000, a polydispersity index of 2.0 to 3.0 and a residual solvent concentration of less than 10.000 ppm by weight.
摘要:
A lifting drive for a radiation filter in a mammography device is provided. The lifting drive includes a recording apparatus that accommodates the radiation filter. The recording apparatus is embodied so that the radiation filter is operatively supported to allow movement for executing a lifting movement in at least one lifting direction. A first drive element is operable to create a drive movement. A first movement transmission element is operable to transmit the drive movement to the recording apparatus. The recording apparatus is operable to convert the drive movement into the lifting movement. A shape of the first movement transmission element is operable to be changed, so that the drive movement is able to be transmitted over different paths.
摘要:
The invention relates to a process for preparing a (meth)acrylate copolymer containing tertiary amino groups by free-radical polymerization in solution from a monomer mixture selected from a) 30 to 70% by weight of a C1-C4-alkyl ester of acrylic acid or methacrylic acid and b) 70 to 30% by weight of an alkyl ester of acrylic acid or methacrylic acid with a tertiary amino group in the alkyl radical and c) 0 to 10% of further copolymerizable vinyl monomers, whereby one or more polymerization initiators, optionally one or more molecular weight regulators and one or more solvents or of a solvent mixture are added to the monomer mixture to give a polymerization mixture, which is polymerized at temperatures from 30 to 120° C. over a period of 2 to 24 hours, where the polymerization mixture is finally polymerized to give a polymerization syrup with a conversion of the monomers to the copolymer of at least 99% by weight, where the polymerization syrup is subsequently degassed by distillation or by extrusion and the degassed polymerization syrup is further comminuted to a copolymer preparation in the form of a granulate or powder, where the copolymer preparation is characterized by a molecular weight (Mw) of 25.000 to 75.000 g/mol a polydispersity index of 2.1 to 2.9 and a residual solvent concentration of less than 1.000 ppm by weight.
摘要:
A mammography unit having a mounting arm, on which a mounting for at least two X-ray receivers is rotatably disposed in such a way that one X-ray receiver at a time is positioned in an examination position inside an intended X-radiation field, while other X-ray receivers each remain in a reserve position outside the X-radiation field, is provided. The at least one reserve position is disposed on a side located in the X-radiation direction, relative to the mounting arm. In the case of two X-ray receivers, the X-ray receivers each form a lateral angle of between 45° and 90° with the axis of rotation of the mounting. By using a releasable connection of the mounting to the mammography unit, high modularity is provided.
摘要:
A sifting machine includes a screen; a plurality of spaced leaf springs supported below the screen and extending transversely to the length dimension of the screen; and a drive connected to the leaf springs for causing each leaf spring to periodically bend away from the screen and subsequently move rapidly towards the screen to intermittently beat the latter. The active beating length of each leaf spring is somewhat less than the useful width of the screen. There are further provided a downwardly resiliently yielding support for opposite ends of the active beating length of each leaf spring and a cable or the like attached to the mid portion of each leaf spring. The cable forms part of the drive for agitating each leaf spring.
摘要:
The invention relates to a process for preparing a (meth)acrylate copolymer containing tertiary amino groups by free-radical polymerization in solution from a monomer mixture selected from a) 30 to 70% by weight of a C1-C4-alkyl ester of acrylic acid or methacrylic acid and b) 70 to 30% by weight of an alkyl ester of acrylic acid or methacrylic acid with a tertiary amino group in the alkyl radical and c) 0 to 10% of further copolymerizable vinyl monomers, whereby one or more polymerization initiators, optionally one or more molecular weight regulators and one or more solvents or of a solvent mixture are added to the monomer mixture to give a polymerization mixture, which is polymerized at temperatures from 30 to 120° C. over a period of 2 to 24 hours, where the polymerization mixture is finally polymerized to give a polymerization syrup with a conversion of the monomers to the copolymer of at least 99% by weight, where the polymerization syrup is subsequently degassed by distillation or by extrusion and the degassed polymerization syrup is further comminuted to a copolymer preparation in the form of a granulate or powder, where the copolymer preparation is characterized by a molecular weight (Mw) of 25.000 to 75.000 g/mol a polydispersity index of 2.1 to 2.9 and a residual solvent concentration of less than 1.000 ppm by weight.
摘要:
A lifting drive for a radiation filter in a mammography device is provided. The lifting drive includes a recording apparatus that accommodates the radiation filter. The recording apparatus is embodied so that the radiation filter is operatively supported to allow movement for executing a lifting movement in at least one lifting direction. A first drive element is operable to create a drive movement. A first movement transmission element is operable to transmit the drive movement to the recording apparatus. The recording apparatus is operable to convert the drive movement into the lifting movement. A shape of the first movement transmission element is operable to be changed, so that the drive movement is able to be transmitted over different paths.