摘要:
A spectroscopy system for spectro-chemical analysis of a sample includes a plasma torch (50) for generating a microwave induced plasma (90) as a spectroscopic source. The plasma forming gas is nitrogen which can contain an oxygen impurity. Thus the system includes a nitrogen generator (70) which is preferably supplied with compressed atmospheric air from a compressor (75) for oxygen to be removed from the air by adsorption. The invention allows the use of an on-site nitrogen gas generator and thus gives cost savings because the need to obtain supplies of bottled high purity gas is eliminated.
摘要:
A counter-torque wrench for use with spinal implantation systems is provided wherein the counter-torque wrench engages a spinal implant rod and a bone screw body in a manner to promote a perpendicular alignment between the longitudinal axis of the rod and the longitudinal axis of the bone screw body, and a co-linear alignment between the longitudinal axis of the bone screw body and the longitudinal axis of the -wrench body. The counter-torque wrench may comprise a handle attached to a first end of the counter-torque wrench body and a rod engaging member attached to a second end of the counter-torque wrench body. The rod engaging member may comprise generally opposing slots, wherein each slot comprises a prong extending into each slot, the prong creating a generally L-shaped slot, and a pocket formed by a curved feature of each slot.
摘要:
In one embodiment of the present invention a system for connecting a fastener element (e.g., a pedicle screw) relative to a rod for the purposes of vertebral fixation is provided. The system may permit multi-aerial movement between the fastener element and the rod. Further, the system may permit the angular relationship between the fastener element and the rod to be held in a desired orientation. For the purposes of describing and claiming the present invention, the term "rod" is intended to refer to any elongated structure. Such an elongated structure may be solid or hollow and may have any desired cross-section (e.g., circular, oval, square, rectangular). Further, for the purposes of describing and claiming the present invention, the term "interference fit" is intended to refer to physical contact between two or more components.
摘要:
Die Erfindung bezieht sich auf ein Verfahren zum scannenden Messen einer Oberflächenkontur eines um eine Dreh- und/oder Schwenkachse gelagerten Werkstücks mittels eines Koordinatenmessgerätes und eines entlang dessen kartesischer Koordinaten bewegbaren Sensors. Um mit einfachen Maßnahmen überaus präzise eine Oberflächenkontur eines Werkstücks zu bestimmen, wobei insbesondere auch höhenmäßig starke Profilierungen präzise erfasst werden sollen, wird vorgeschlagen, dass der Sensor und das Werkstück während des Messens derart zueinander ausgerichtet werden, dass Antastrichtung des Sensors im jeweiligen Messpunkt unter einem konstanten Winkel a zur den Messpunkt durchsetzenden Oberflächennormalen des Werkstücks verläuft.
摘要:
A vehicle security system (11) of the kind which is armed or disarmed by means of a radio frequency signal generated by a portable device (1) located remote from the vehicle (8). The portable device (1) includes a transmitter (4), a battery (6) capable of providing a power source for the transmitter (4), and a switch (7) which is operable to connect the transmitter (4) and battery (6) and thereby cause generation of a coded signal. The system includes a secondary signal path (21) which is completed by cooperative engagement between two contacts (15, 16), one (15) of which is provided on the portable device (1) and the other (16) is provided on the vehicle (8). Engagement of the contacts (15, 16) also has the effect of connecting the device transmitter (4) to the vehicle battery (20) which then provides a power source for the transmitter (4) so that a coded signal is generated and transmitted along the secondary signal path (21). A signal so generated will cause the security system (11) to be disarmed. The portable device (1)may form part of the vehicle ignition key.
摘要:
The invention relates to a method and an apparatus for dimensionally measuring parts by means of a coordinate measuring instrument. In order to be able to measure with great accuracy parts that are made of different materials, a computed tomography sensor is integrated into the coordinate measuring instrument. The coordinate measuring instrument further comprises an optical or tactile sensor.
摘要:
In one embodiment of the present invention a system for connecting a fastener element (e.g., a pedicle screw) relative to a rod for the purposes of vertebral fixation is provided. The system may permit multi-axial movement between the fastener element and the rod. Further, the system may permit the angular relationship between the fastener element and the rod to be held in a desired orientation. For the purposes of describing and claiming the present invention, the term "rod" is intended to refer to any elongated structure. Such an elongated structure may be solid or hollow and may have any desired cross-section (e.g., circular, oval, square, rectangular). Further, for the purposes of describing and claiming the present invention, the term "interference fit" is intended to refer to physical contact between two or more components.
摘要:
Communication system (10) includes endpoints (20), tracing nodes (30), nodes (35), and a management node (40). Tracing nodes (30) and nodes (35) support communication between endpoints (20) by transmitting call signaling messages (50) along a path between endpoints (20). Tracing node (30) and nodes (35) may convey call signaling message (50) on one of multiple protocol paths connecting any two nodes. During operation, management node (40) may request the tracing of calls matching specified criteria. Management node (40) specifies the trace criteria in trace trigger requests sent by the management node (40) to one or more tracing nodes (30). Tracing nodes (30) compare the contents of call signaling message (50) to specified trace criteria included in trace trigger request (70). When the trace criteria matches, the relevant tracing node (30) transmits a trace tag (75) embedded in trace trigger request (70) to other tracing nodes (30). Other tracing nodes (30) then provide tracing information to a designated management node (40) upon receiving a call signaling message (50) that includes the transmitted trace tag (70).
摘要:
A Plasma torch (10) for microwave induced plasma spectrochemical analysis of a sample includes a nozzle (30) in an inlet (18) for the main plasma gas flow between outer tube (12) and intermediate tube (14) of the torch (10). The nozzle (30) increases the gas flow velocity in the sheathing gas layer for the plasma which is provided by the gas flow from the annular gap (22) between the tubes (12 and 14). The increased velocity of the gas in the sheathing gas layer "stiffens" that layer and thus better confines the microwave induced plasma (such better confinement not being necessary for an ICP torch). Thus the torch is of improved durability for a microwave induced plasma compared to an ICP torch. The sample injection (inner) tube (16) may have a reduced diameter outlet at its end (34) which is substantially level with the end (35) of intermediate tube (14) to improve injection of a sample into the microwave induced plasma. The inlet end (26) of the sample injection tube (16) may include a heater (36) to assist in preventing blockages in tube (16) near its outlet end.
摘要:
The invention relates to a method for the scanning measurement of a surface contour of a workpiece mounted about a rotating or pivoting axis, by means of a co-ordinate measuring device and a sensor which may be displaced along the Cartesian co-ordinates thereof. According to the invention, a surface contour of a workpiece may be determined with extreme precision, in particular, large vertical profiling may be precisely recorded, whereby the sensor and the workpiece are arranged during the measurement relative to each other such that the sensing direction of the sensor at each measuring point is at a constant angle alpha to the surface normals at the measuring point.