Abstract: Disclosed is an electronic-component mounting apparatus 1 for mounting a plurality of electronic components onto a printed-wiring board 10, which comprises a component mounting head 4 adapted to suck up the electronic component and mount the sucked up electronic component on the printed-wiring board 10 while moving along an X-axis direction, a table 8 adapted to move the printed-wiring board 10 along a Y-axis direction, an electronic-component feeding device 12, 14 attached to the table 8 and adapted to move in sync with the movement of the printed-wiring board 10, and component image-recognition/correction means 16 for correcting a posture of the electronic component in accordance with image recognition of the posture, during the time between the sucking up and mounting of the electronic component by the component mounting head, wherein respective positions of the sucking of the electronic component, the mounting of the electronic component and the image recognition are located on the X-axis.

Abstract: A tape transport apparatus for recording tape having a rotationally driven tape drive capstan for advancing the tape and a pinch roller for firmly engaging the tape with the tape drive capstan includes a rapid tape advancement feature. Clutch devices selectively couple rotational driving force to the tape drive capstan from a first normal playing rate motor devices or a second high speed advancement motor devices. The clutch devices are centrifugal force-actuated and of a ratchet-like nature. A rotating element connected to the tape drive capstan includes a code, and a sensor which senses the code and derives signals indicative of each revolution of the tape drive capstan. The signals are electrically processed and an accurate measurement of the extent of tape advancement is obtained and displayed.

Abstract: A tape cassette comprises an impedance roller which is set on the opposite side of a magnetic tape to a magnetic head closely upstream thereof as viewed from the direction in which the magnetic tape runs. The impedance roller presses the magnetic tape toward the magnetic head, thereby preventing the magnetic tape from being shaken.

Abstract: Disclosed are methods and apparatus for providing torsional fluid dampening in the kHz region with an inertial mass located in a rotary fluid container, and with a viscous fluid friction boundary layer located between that mass and a circumferential wall of the container. A supply of viscous liquid having a volume equal to the combined volumes of the boundary layer and inertial mass is provided. Both the inertial mass and the boundary layer are formed with that supply of viscous liquid in the fluid container which may then be rotated.