| 摘要 |
<p>The theft-prevention equipment is in two parts, the first (1) forming a base-plate on which the housing is placed. It has transverse end faces(4,7), the first of which has a pointer(6) coupled to a mechanical device on the second part(2) which forms the cover immobilising the housing, while the opposite end of the base is U-shaped. The cover has a rectangular extension(13) on one of its larger side surfaces, whose length is greater than its width. The extension has a central oblong groove (16), and a circular hole near its free edge. The baseplate has on the outside a kite-tail-shaped mounting (17) in which the extension is inserted. A boss (18) on the baseplate fits in the groove, limiting cover movement. A hat-shaped protrusion (19) fitting in the hole (15) in the extension keeps the cover stable when fully extended.</p> |
