33a, 



33b. 



Shoulder rotate—run three Teflon- insulated, 22-gauge wires through the 

 outer housing and keep them in position, as shown, with an appropriate 

 bond. Run two twisted Teflon-insulated, 22-gauge wires through the 

 fitting and let them stick out of the housing. 



Shoulder pivot—proceed with three wires as described in 33a, but 

 instead of running the wires through the fitting, let them stick out of 

 the outer housing. 



34. Strengthen and protect the parts of the wires which run through the bore 

 with pieces of heat-shrinkable tubing (not shown in the photographs). 



63 



