Enabler of teaching pendant
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United States of America Patent
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Mar 28, 2006
Grant Date -
Oct 2, 2003
app pub date -
Aug 22, 2001
filing date -
Sep 6, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
In a case where a left-hand push-button switch is ON, a second relay RL2 is electrically de-energized to open a normally close contact RL2-1 of the second relay RL2 so that a relay contact circuit RC is opened. If, in this state, a right-hand push-button switch is shifted to a second OFF state, a normally close contact R3-1 of the right-hand push-button switch is opened. Thus, a third relay RL3 is not electrically de-energized and a first and a second circuits are in cutoff until both the right-hand and the left-hand push-button switches are returned to a first OFF state.
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