Control device for a two-hand control means for controlling...

Details Control device for a two-hand control means for controlling... Control device for a two-hand control means for controlling...

H - Electricity

01

F

H01F 7/20 (2006.01) F15B 20/00 (2006.01) F16P 3/20 (2006.01) G05B 9/02 (2006.01)

Patent

CA 2193168

A control device contains two electromagnets (61, 62) in a respective current supply circuit (41, 44; 42, 44) which includes a biassed switch (20, 21) having first and second output terminals (2, 4), wherein the switches are biassed towards the first output terminal (2). When the magnets are moved to an active state against a biassing force, the switch in one circuit switches from its first (2) to its second terminal (4) to which the magnet is connected. The first and second terminals (2, 4) of the two switches (20, 21) are connected crosswise, so that a control signal (S1, S2) to the first circuit will initially energize the magnet of the second circuit, and vice versa, wherein the magnet remains in an active state if switching of the switches takes place within the time period taken for one of the magnets to leave its activated state after deactivation, i.e. when the two control signals (S1, S2) are both applied within this time period. The control device may be used, for instance, for the two-hand control of pneumatic clutches and brakes in an eccentric press.

a présente invention concerne un dispositif de commande comportant deux électroaimants (61, 62) alimentés par des circuits respectifs (41, 44; 42, 44) comportant chacun un interrupteur monostable (20, 21) à deux bornes de sortie (2, 4), les interrupteurs étant maintenus en contact avec la première borne de sortie (2). Lorsque les aimants sont énergisés de manière à contrer la force de rappel, un des interrupteurs passe de la borne de sortie (2) à la borne de sortie (4) à laquelle est connecté l'aimant. Les deux bornes (2, 4) des deux interrupteurs (20, 21) sont connectées en croisé de telle sorte qu'un signal de commande (S1, S2) acheminé vers le premier circuit aura pour effet d'énergiser en premier l'aimant du deuxième circuit, et vice versa, l'aimant énergisé demeurant actif si la commutation des interrupteurs intervient avant la désactivation du deuxième aimant, c.-à-d. lorsque les deux signaux de commande (S1, S2) sont donnés à l'intérieur d'une même période. Ce dispositif de commande peut être utilisé, par exemple, pour la commande à deux mains des embrayages et freins pneumatiques d'une presse à excentrique.

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