Patent ID: 7019227

Claim:
An enabler for teaching pendant comprising a push-button switch capable of being shifted from a first OFF state (undepressed) to an ON state and then to a second OFF state as operatively associated with push-button depressions and of establishing an enable state when assuming said ON state, the enable state where a predetermined operation of an industrial machine is permitted; wherein said push-button switch comprises a switch case; a push button depressibly supported by said case; at least one primary contact including a stationary terminal disposed in said case, and a movable terminal shifted from an away position to a contact position and then to the away position relative to said stationary terminal as operatively associated with pressing-down on said push button; and at least one auxiliary contact disposed in said case and designed to be closed when said primary contact is in said first OFF state and to be opened when said primary contact is in said second OFF state; wherein a left-hand operation section to be gripped by the left hand and a right-hand operation section to be gripped by the right hand are provided at a pendant body; wherein said push-button switches for left hand and for right hand are disposed at individual inside portions of said both operation sections in order to be manipulated by gripping; wherein said left-hand push-button switch and said right-hand push-button switch are electrically connected in a manner that the enable state is established by switching ON at least either one of said left-hand push-button switch and said right-hand push-button switch; and wherein inhibition means is provided for inhibiting the enable state for a period of time between when at least either one of said left-hand push-button switch and said right-hand push-button switch is shifted to said second OFF state and when both said left-hand push-button switch and said right-hand push-button switch are returned to said first OFF state.