In accordance with the present invention a rotary oscillating member is rocked or pivoted back and forth by {HEAD ~ an operating member}, such as {TAIL ~ a lever} 
In accordance with the present invention a rotary oscillating member is rocked or pivoted back and forth by { HEAD ~ an operating member } , such as { TAIL ~ a lever }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL