| 摘要 |
The wire (12) is formed between the windings with a fastening arrangement for its fixture to a base (14), and consisting of a loop formed out its own structure. The loop is surrounded by a fixation head (18) of suitable insulating material. The head is provided with a hole which is concentric with the loop, and which accommodates a nail, screw, or similar. The spirally wound wire is of sprung material, such as spring steel, or the like, and is encased in insulating material, such as plastic. The formation of the windings of the wire is such that they are on each side of the fixture. - The fixation head is plate-shaped, and provided with a boss (24) concentric with the loop. This boss stands proud of the plate surface, and incorporates the hole for the nail or screw. The fastening loop is displaced relatively to the spiral wire so that it is located at the side of the spiral outer periphery. (Provisional basic advised Week 8803)(1/3) |
