{HEAD ~ The improvement} is a protective circuit comprising a speed limiting control responsive to engine speed to apply to {TAIL ~ the trigger} of one of the switches a disabling signal to cause the switch to conduct and discharge the capacitor in response to a predetermined response speed 
{ HEAD ~ The improvement } is a protective circuit comprising a speed limiting control responsive to engine speed to apply to { TAIL ~ the trigger } of one of the switches a disabling signal to cause the switch to conduct and discharge the capacitor in response to a predetermined response speed
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