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Publication of FR688835ApublicationCriticalpatent/FR688835A/fr
B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
B66B13/02—Door or gate operation
B66B13/14—Control systems or devices
B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
B66B13/18—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors
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Automation & Control Theory
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FR688835D1929-02-041930-01-25Dispositif de sûreté pour puits d'extraction en charpente
ExpiredFR688835A
(fr)