摘要:
The present invention relates to a straight stem (10) for the implantation into a proximal femur, the stem (10) comprising a proximal stem section (12) and a distal stem section (14), the distal stem section (14) having a distal end (24) and a distal tip (26) arranged directly adjacent to the distal end (24) and defining a distalmost point of the distal end (24), the stem (10) having, in an anterior-posterior view, a medial contour and a lateral contour, and the stem (10) having a straight stem center axis (20) between the medial contour and the lateral contour, wherein the distal end (24), in an anterior-posterior view, has a convexly curved contour, and wherein the convexly curved contour of the distal end (24) merges with straight sections (46, 48) of the medial contour and of the lateral contour at a medial merging point (22) and a lateral merging point (28), respectively, wherein the medial merging point (22) and the lateral merging point (28) are offset with respect to each other in a direction parallel to the stem center axis (20), wherein the lateral merging point (28) is arranged proximally with regard to the medial merging point (22), wherein the convexly curved contour of the distal end (24) is such that the distal tip (26) is medially offset with respect to the stem center axis (20), wherein the convexly curved contour of the distal end (24) has a curved medial section extending between the distal tip (26) and the medial merging point (22) and a curved lateral section extending between the distal tip (26) and the lateral merging point (28), and wherein the contour of the distal end (24) is asymmetrically convexly curved such that the degree of curvature of the curved lateral section is smaller than the degree of curvature of the curved medial section.
摘要:
The present invention relates to a straight stem (10) for the implantation into a proximal femur, the stem (10) comprising a proximal stem section (12) and a distal stem section (14), the distal stem section (14) having a distal end (24) and a distal tip (26) arranged directly adjacent to the distal end (24) and defining a distalmost point of the distal end (24), the stem (10) having, in an anterior-posterior view, a medial contour and a lateral contour, and the stem (10) having a straight stem center axis (20) between the medial contour and the lateral contour, wherein the distal end (24), in an anterior-posterior view, has a convexly curved contour, and wherein the convexly curved contour of the distal end (24) merges with straight sections (46, 48) of the medial contour and of the lateral contour at a medial merging point (22) and a lateral merging point (28), respectively, wherein the medial merging point (22) and the lateral merging point (28) are offset with respect to each other in a direction parallel to the stem center axis (20), wherein the lateral merging point (28) is arranged proximally with regard to the medial merging point (22), wherein the convexly curved contour of the distal end (24) is such that the distal tip (26) is medially offset with respect to the stem center axis (20), wherein the convexly curved contour of the distal end (24) has a curved medial section extending between the distal tip (26) and the medial merging point (22) and a curved lateral section extending between the distal tip (26) and the lateral merging point (28), and wherein the contour of the distal end (24) is asymmetrically convexly curved such that the degree of curvature of the curved lateral section is smaller than the degree of curvature of the curved medial section.
摘要:
The invention provides for a system, method, and device for using the existing copper loop plant of twisted pair wiring for data communication by using a plurality of pairs in a cable bundle of twisted pair for the downstream data direction simultaneously, as if the plurality of twisted pair in the cable bundle were a broadcast medium. Between an individual subscriber's access pair and the cable bundle, an aggregation device is used to combine all received signals from the plurality of twisted pairs in the cable bundle and to make the entire downstream bandwidth of the plurality of pairs available to the subscriber.
摘要:
The invention relates to a device for electrically contacting, particularly for contacting circuit boards that are positioned in basically perpendicular fashion relative to each other, with an insulating housing (10) in the form of a tube in whose wall (11) is positioned at least one electrically conductive element (20, 30, 40, 50) exhibiting at least two connector elements (21, 22, 31, 32, 41, 42, 51, 52, 53), such that the connector elements (21, 22, 31, 32, 41, 42, 51, 52, 53) project from the wall (11) of the housing (10).
摘要:
Security information such as fixed or dynamically received camera location information, laser signature information, timestamp information, and network information, may be used to secure the transport and storage of surveillance video. Where the surveillance video is to be transported on a communication network, the round trip time from a video data storage server to the surveillance camera and back to the video data storage server may be monitored and periodically added to the secured video data. By checking to see whether the round trip time has changed, it may be possible to determine whether the video has been tampered with. The secured video data may also be transported over two or more paths on the network to two or more video data storage servers so that redundant copies may be stored at different primary locations. By comparing copies of the data, alteration of one of the copies may be detected.
摘要:
Security information such as fixed or dynamically received camera location information, laser signature information, timestamp information, and network information, may be used to secure the transport and storage of surveillance video. Where the surveillance video is to be transported on a communication network, the round trip time from a video data storage server to the surveillance camera and back to the video data storage server may be monitored and periodically added to the secured video data. By checking to see whether the round trip time has changed, it may be possible to determine whether the video has been tampered with. The secured video data may also be transported over two or more paths on the network to two or more video data storage servers so that redundant copies may be stored at different primary locations. By comparing copies of the data, alteration of one of the copies may be detected.
摘要:
A light barrier detects an object which interrupts a beam of light of the light barrier. A light transmitter transmits a light beam in the direction of a reflector and a light receiver receives a reflected portion of the light beam. The improved light barrier has a reflector which is made as a cylindrical reflector column having a plurality of retroreflecting elements aligned toward the outer surface. The diameter of the reflector column is considerably smaller than the extent of the light beam perpendicular to the cylinder axis so that an optically effective detection beam of light is formed between the sensor and the reflector column whose cross-section at the sensor is determined by the light transmitter and, in direct proximity to the reflector column. The cross-section is determined by the areal overlap of the light beam with the reflector column.
摘要:
The invention relates to a light barrier for the detection of an object (2) which interrupts a beam of light (5) of the light barrier, having a sensor (4) with at least one light transmitter (4-1) for the transmission of a light beam (5) in the direction of a reflector (10); at least one light receiver (4-2) for the reception of a reflected portion of the light beam; and an evaluation unit (4-3) for the evaluation of the reflected light beam detected by the light receiver (4-2), To provide an improved light barrier which delivers an exact position determination of the object in the conveying device with a small installation and adjustment effort, it is proposed that the reflector (10) is made as a cylindrical reflector column (10) which has a plurality of retroreflecting elements (17) aligned toward the outer surface, with the diameter of the reflector column (10) being considerably smaller than the extent of the light beam (5) perpendicular to the cylinder axis so that an optically effective detection beam of light (20) is formed between the sensor (4) and the reflector column (10) whose cross-section at the sensor (4) is determined by the light transmitter (4-1) and, in direct proximity to the reflector column (10), by the areal overlap of the light beam (5) with the reflector column (10).
摘要:
Information may be extracted from an array of relatively low sensitivity hazardous material sensors deployed, for example within a population center, by collecting identification information, such as video data, RFID data, proximity data, and IR data along with the hazardous material sensor reading. The identification information may then be used to identify objects in the vicinity of the hazardous material sensor at the time the reading was taken. By using identification data to identify an object, and then correlating sensor data readings for that object with other sensor data readings for the same object, as identified using previously collected identification information, a statistically more significant reading may be obtained for that particular object than would be obtainable by any one particular hazardous material sensor. Optionally the proximity of the object to the sensors may be used to weight the readings from the sensors.
摘要:
A power tool having a plastics material housing and a power output spindle is provided with a tube-like metal member in the front end of the housing. A bearing is received within the tube-like member for supporting the spindle. The tube-like member has at the front end thereof radially outwardly extending tabs for dissipating heat therefrom. The tabs are preferably partially embedded in the plastics material of the front end of the housing for anchoring the member therein, alternate tabs preferably being angled rearwardly. The member may also support ratchet teeth of a hammer drill. A fan may be mounted on the spindle in the region of the front end of the member for facilitating dissipation of heat from the radial tabs.