Device for suspending at least one body in cords, bands, or similar flexible carrying members

摘要

738,237. X-ray apparatus. DANSK RONTGEN-TEKNIK AKTIESELSKAB. Sept. 14, 1953 [Sept. 13, 1952], No. 25358/53. Class 98 (1). [Also in Group XI] A device, especially for medical work, for suspending a unit such as an X-ray tube or an operation lamp, comprises a number of flexible carrying members which only withstand tensile stresses and to which the unit is secured at a number of fixation points, and support means to which the other ends of the members are connected, adapted to alter the effective length of the carrying members, the carrying members being so arranged as to restrict motion of the centre of gravity of the unit to a surface having a downwardly-pointing peak at the position occupied by the centre of gravity of the unit when it is at rest. As shown in Fig. 2, a body 1, supporting, e.g., an X-ray tube, is suspended from points E, F, G, H in the ceiling by cords or wires 2, 3, 4, 5 and 21, 31, 41, 51 fixed to the body at A, B, C, D. When the cords are wound up on drums or pulleys, the pairs of cords 2, 21 &c. are preferably equally inclined to the vertical, and ABCD and EFGH are squares, the side of the latter being equal to the diagonal of the former. The cords may be connected to drums 13 on a carriage 10, Fig. 3, which carriage runs by wheels 9 on tracks fixed to the ceiling, or to another carriage running on ceiling tracks at right-angles to the first-mentioned tracks. A motor 14 on the carriage drives by chain gear a worm spindle 16, which engages four worm wheels 15. Each wheel 15 is connected to a shaft 21 carrying a drum 13, on which two cords are wound. Arms 24, 25 connected to nuts engaging oppositely threaded portions of each spindle lay the cords evenly on the drums 13. Shafts 21 are slightly inclined to the horizontal, so as to be at right angles to the cords in an intermediate position of the apparatus. In another modification, Fig. 5, a plate 31 tiltably supporting an X-ray tube 30 is suspended by broad bands 32, 33, 35 and (not shown) 34, which are wound on drums 40 interconnected by bevel gears 42 and driven by an electric motor. The drums and driving gear are mounted in a carriage travelling on tracks by wheels 9 mounted on a spindle 53 also carrying a gearwheel 52 engageable by a pawl operated by a relay 54. The motor driving drums 40 also drives a threaded spindle along which moves a nut to operate contacts in the motor control circuit to prevent over-running or to bring the apparatus automatically to desired positions. A telescopic control handle 51 has push-buttons operating brakes. The suspended unit may be adapted for stereo-radiography.