| 摘要 |
A tension indicator comprises a housing (1) mountable on a strap S which passes through mouths (5) and (6) of the housing. Within the housing, a barrel (11) is rotatably mounted upon a transverse axis (A). The barrel has a cross-passage (12) for strap (S). Towards its ends barrel (11) has discs (14), carrying slot (15) defining formations (16). The slots engage springs (21). The arrangement is such that in the relaxed state of the springs, barrel passage (12) is out of alignment with mouths (5) and (6), so that a strap (S) passing through the tension indictor is deflected to a lazy Z path . The housing has a window (23), through which barrel (11) can be seen. When springs (21) are relaxed, a "SLACK" portion (24) of barrel (11) can be seen through window (23). When strap (S) is tensioned it is straightened by abutting on ends (25) of passage (12). A different "TENSIONED" portion (26) of barrel (11) now becomes visible in window (23). Thus the tension is strap (S) can be assessed according to which of the portions (24) and (26) is visible in window (23). |
