The motor 20 is enclosed within a casing 23 which has {TAIL ~ a downwardly depending pin} 231 pivotally connected to {HEAD ~ the other end} of the oscillating arm 24 
The motor 20 is enclosed within a casing 23 which has { TAIL ~ a downwardly depending pin } 231 pivotally connected to { HEAD ~ the other end } of the oscillating arm 24
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH