Protective fitting with lock cylinder

摘要

The lock cylinder is covered by a protective cap (17) made of hard material such as hardened steel the thickness of which corresponds to the thickness of the outer plate (1). The cap contains a cavity (18) containing the cylinder which it matches in shape. Over and below the cap are hard material inserts (16,26) resistant to drilling. The outer plate has two inner longitudinal slots (9) widening towards the sides and forming back-taperings (10). Fixture sleeves (11) have extensions (12) each with an internal thread for inserting fixture screws (15).