| 摘要 |
A clamp to fit a device to a supporting pole comprises a universal joint to fit to the pole, and three tubes (1-3) which are slidable relative to each other, two of the tubes (1, 2) being provided with respective clamp arms (4, 5). Each tube is provided with a set of holes, the pitch of which differs between at least two of the tubes such that a Vernier hole arrangement is obtained. A pin (6) may be inserted through holes in all three tubes to fix them relative to each other, and a lock (7) may be provided on the end of the pin. The arrangement is such that the clamp arms may be fixed to devices in a range of different sizes. The clamp arms may be attachable to their respective tubes in one of two perpendicular positions, one position providing a smaller area of contact between the clamp arms and the device to which they clamp. One of the clamp arms (5) may be rotatable to provide a firmer grip on non-square devices. The universal joint may be formed integrally with the third tube (3). |
