摘要:
The invention relates to a hydrophobically coated molecular sieve which comprises particles having a particle size of 1000 nm or less, the surface of the particles being coated with a silane of the general formula SiR1R2R3R4, and also to a method of producing it and to a method of using it. In addition, the invention relates to use of the coated molecular sieve and also to compositions comprising the molecular sieve and to use in producing apparatus such as, for example, electronic components and devices.
摘要:
A loudspeaker device (200) is presented which includes a zeolite material (100) comprising zeolite particles (102) having a silicon to aluminum mass ratio of at least 200. For an increased pore fraction of pores with a diameter in a range between 0.7 micrometer and 30 micrometer shows an increased shift of the resonance frequency down to lower frequencies has been observed.
摘要:
A flat can for receiving textile fiber slivers deposited therein while a jigging motion is imparted thereto comprises can sides defining an upper can bead at the top thereof. A can plate is configured to be vertically movable within the can sides between an empty position and a full position. In the empty position the can plate is at a height lower than the upper can bead. The can plate may comprise a rim around the circumference thereof which has a top generally adjacent to the upper can bead when the can plate is at the empty position. The rim may include oppositely facing incline surfaces at the ends thereof. The can sides may also include stops defined on the inner surface thereof. The stops serve to define the upper limit of travel of the can plate within the can.
摘要:
A loudspeaker device (200) is presented which includes a zeolite material (100) comprising zeolite particles (102) having a silicon to aluminum mass ratio of at least 200. For an increased pore fraction of pores with a diameter in a range between 0.7 micrometer and 30 micrometer shows an increased shift of the resonance frequency down to lower frequencies has been observed.
摘要:
To piece an open-end spinning device, the yarn end is introduced into the spinning rotor while the spinning rotor is stopped. An auxiliary suction air stream prevailing at the opener roller housing takes effect and sucks the yarn into the fiber feeding channel where it is held. The spinning rotor which was stopped until then is then again driven. Following this, the negative spinning pressure is switched on while the auxiliary suction air stream is simultaneously switched off. This causes the yarn end to be taken out of the fiber feeding channel and to be fed to the fiber collection surface of the spinning rotor where it is combined with the fibers which are again conveyed to the fiber collection surface. The yarn is then withdrawn in the form of a continuous yarn through the yarn draw-off pipe and out of the spinning rotor.
摘要:
In order to minimize switching losses occurring in antenna switches for wireless antenna diversity telecommunications devices with two antennas, for example base station of a DECT cordless telephone, in each case an electronic switching element (SE1 . . . SE4), constructed for example as a PIN diode or switching diode, is arranged in a first signal path (SW1) from a transmitter (TR) to a first transmission/reception antenna (A1), a second signal path (SW2) from the transmitter (TR) to a second transmission/reception antenna (A2), a third signal path (SW3) from a receiver (RE) to the first transmission/reception antenna (A1) and a fourth signal path (SW4) from the receiver (RE) to the second transmission/reception antenna (A2). The switching elements (SE1 . . . SE4) form here, together with the signal paths (SW1 . . . SW4), a ring circuit.
摘要:
The invention is a process and a device for the jigging of a flat can in a textile draw frame. According to the invention, the flat can is subjected to different dynamic moments in the translational movement along the jigging path. It is a characteristic of the invention that the speed is regularly modified in proximity of the reversal points (P1, P2), i.e. in the area of the reversal paths (UW1, UW2). The jigging device is provided with a driving device which renders the constant translational movement changeable in proximity of the reversal point (P1, P2). The driving device may be a servomotor controlled by a computer which serves as the control device. In another embodiment the diving device is a different, less expensive electric motor on the drive shaft of which belt pulleys capable of being coupled are installed.