| 摘要 |
Controls for winding a strip such as magnetic recording tape at a constant linear speed on to a take-up reel from a supply reel. The controls are responsive to the instantaneous angular speeds of both reels, maintaining at a substantially constant value the ratio of the product of the squares of the speeds to the sum of the squares, by varying the speed of the take-up reel while sufficiently restraining the supply reel to maintain tension on the strip.
|
