摘要:
A dual-head gamma camera imaging system comprises a master ring gear and a slave ring rotatable about a longitudinal axis. The master ring gear is rotatably supported by a gantry. The slave ring is rotatably supported by the master ring gear and concentric with the master ring gear, such that the master ring gear and the slave ring can be rotated independently about s longitudinal axis. A first detector is supported by a first cantilever support member mounted to the master ring gear. A second detector head is supported by a second cantilever support member mounted to the slave ring. The angular displacement between the detector heads can be varied by providing relative rotation between the master ring gear and the slave ring. The rotation can be accomplished by using the weight of one of the detector heads to hold that detector head stationary while rotating the other detector head using a motor. The imaging system also includes a mechanism for rotating a detector head about an axis perpendicular to its imaging surface to increase the field of view along the longitudinal axis. The detector is mounted to an inner support ring which is rotatably coupled to and concentric with an outer support ring. The outer support ring is mounted to at least one ring gear.
摘要:
A technique for storing and retrieving information containing discs utilizing a movable disc storage magazine is disclosed herein. The disc storage magazine, which is designed to store a plurality of information containing discs in individual compartments, is movable along a predetermined path which passes through a specific disc storage station such that each of the individual compartments is positionable within that station. At the same time, a disc drive for storing information on and retrieving information from the discs is located at a disc drive station spaced from the disc storage station. Means are provided for moving the disc storage magazine in a way which places a desired magazine compartment at the disc storage station and means are provided for transferring an information containing disc between that compartment and the disc drive station.
摘要:
An apparatus for removing lap soldered circuit packages from the module to which they are soldered is presented. The module is placed over the apparatus with the circuit package on the underneath side. A nozzle of the apparatus is raised so as to be centered below the circuit package, and a heated gas is directed over the lap soldered leads for a predetermined time. When the solder melts, gravity causes the circuit package to fall away from the module. The falling package is caught and held by the nozzle. The nozzle is then lowered away from the module, and as it is lowered, push rods protrude upwardly through the nozzle to support the circuit package and lift it out of the nozzle, thereby positioning the nozzle for easy and safe handling.
摘要:
An apparatus for aligning the leads of an integrated circuit (IC) package with respect to the pads of the printed circuit board to which they will be bonded is presented. An alignment fixture, comprising a coarse alignment pedestal mounted on a fine alignment block, receives the IC package on the alignment fixture and aligns the leads with respect to a reference coordinate system of the alignment fixture. A vacuum chuck is lowered to contact the aligned package, and is then raised to lift the aligned package off the fine alignment block while holding it in the aligned position. An X-Y table positions the printed circuit board under the aligned package. The vacuum chuck lowers the aligned package until the leads contact the pads, and holds it while the leads are bonded to the pads.