Improvement to spring locks

摘要

Improvement to spring locks by the production of a cage, the tongue 1 of which is retractable and equipped with a stud 1a which engages into a recess 8 of the beards of the bolt 9, temporarily blocking the latter when this tongue is subjected to an abnormal push as a consequence of an attempt to break in. Springs 6 ensure return of the tongues so as to project and thereby the retraction of the stud 1a under normal operating conditions. <IMAGE>