| 摘要 |
<p>The present invention relates to improvements in double action cylinder or circular locks, which are applicable to doors and similar structures. The invention utilizes a single unitary construction forming the whole complex of doorknobs, casing, support and principal body in a single assembly. The mechanism makes it possible to act as a latch and/or a sliding bolt. The outer doorknob is fitted on a brass bar of suitable proportions, which in turn in inserted in the principal body the bar protecting the lock against violent lateral shocks.</p> |
