{HEAD ~ The improvement} is {TAIL ~ a protective circuit} comprising a speed limiting control responsive to engine speed to apply to 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 { TAIL ~ a protective circuit } comprising a speed limiting control responsive to engine speed to apply to 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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