| 摘要 |
874,837. Winding &c. apparatus; taking up slack of cables &c. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. April 1, 1960 [April 20, 1959], No. 13463/59. Classes 78 (2) and 78 (5). [Also in Group XXVIII] A cable 4 is secured to a rotatable storage reel 5 at an intermediate point 20 so as to divide the cable 4 into a part on the reel and a part retained in the form of a flat spiral coil 41, the arrangement being such that as the reel is rotated to pay off or draw in the first part of the cable, the diameter of the turns in the coil 41 changes. Thus, however much cable is paid off or drawn in by the reel 5, the length of cable in the spiral remains constant, and the cable at the outer periphery of the spiral may be fixed to a part 43 rigid with fixed frame plates 7, 8, and no twisting of the cable occurs. As shown, the cable 4 supports and contains the conductors for a television camera 1 for examining the core structure of a nuclear reactor. The part of the cable on the reel 5 is concentric with a hose 3 leading at 20 to the interior of the hub 6 of the reel 5. Coolant gas is supplied to the hose 3 via a sealed coaxial connection 73. The inner end of the cable 4 is internally coiled within the hub 6 and then passes through an elbow-shaped member 70 which is rigid with the hub 6. Also rigid with the hub 6 is a block 30 around which is wound the first turn of the coil 41. A spiral spring 35 is interleaved with the turns of the coil 41, and has its inner end fixed to the block 30 and its outer end 38 to side plates 26, 27 which are secured to the frame of the device. The cable 4 passes out through a gap 42 in a circumferential channel member 28 joining the plates 26, 27 to the connection at 43. The hub 6 is supported for rotation relative to the fixed frame plates 7, 8 by three ballbearing mounted rollers 59 and three similar rollers 58. The hub is located axially by a groove 70 which engages the rollers 58. The reel 5 is rotatable by a handle 78. This acts through a ratchet mechanism which may be set to hold the camera 1 against downward movement, but permits it to be raised. Alternatively the ratchet mechanism 103 may be disconnected by a lever 110 to permit the camera 1 to be wound up or down. |
