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B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
B66C13/00—Other constructional features or details
B66C13/18—Control systems or devices
B66C13/22—Control systems or devices for electric drives
B66C13/23—Circuits for controlling the lowering of the load
B66C13/24—Circuits for controlling the lowering of the load by DC motors
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Automation & Control Theory
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Mechanical Engineering
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FR509363A1917-02-131920-02-02Perfectionnements aux systèmes de commande pour moteurs électriques actionnant des grues et appareils analogues
ExpiredFR509363A
(fr)