| 摘要 |
884,186. Automatic loop control systems. INTERNATIONAL COMPUTERS & TABULATORS Ltd. May 6, 1959 [May 30, 1958], No. 17443/58. Class 38 (4). [Also in Groups XVI and XXXVII] In an automatic loop control system, a tape T is held as a loop inside a vacuum column having walls 4-8. Openings 22 in the wall 6 communicate with pressure-responsive switches comprising flexible loops 17 connected to switch arms 15 movable in enclosures having walls 18-21. When the tape is in position T1 the upper flexible loop 17 is subjected to atmospheric pressure and the arm 15 moves to the right, under a spring bias, to engage a contact 14 and energize a brake (not shown) to a reel 1. When the tape being withdrawn from the reel reaches position T2 the loop 17 is subjected to the vacuum in the column and moves the arm 15 to the left so as to feed tape from the reel by connecting a driving motor 12 to a supply S through a contact 13. When the tape loop being fed to the reel increases to position T3 the lower flexible loop 17 is subjected to atmospheric pressure and the arm 15, biased towards a contact 13, connects the motor so as to wind the tape on the reel 1. |
