| 摘要 |
A coiled ribbon spring 36, 32 comprising a coiled ribbon spring body and, at a free end thereof, a tongue portion 36b, 32b having first engagement means 36e, 32e for operative connection to an object 20 to be tensioned, said tongue having at a location 36f, 32f between said first engagement means and the coiled ribbon spring body, second engagement means co-operable with first engagement means 34e, 30e provided on another coiled ribbon spring 34, 30. An assembly of such springs may disposed one above the other working in concert, e.g. in pairs, either adjacent as in figure 1 or alternating as in figure 3, or multiples as in figure 3A. <IMAGE> |
