SOLDERLESS WRAPPED CONNECTIONS PART I 



551 



(a) 



SQUARE TERMINAL 



(d) 



COINED AND FLATTENED 

 WIRE TERMINAL 



(b) 



U TERMINAL 



(e) 



COINED WIRE TERMINAL 



(C) 



V TERMINAL 



(f) 



TWIN WIRE TERMINAL 



Fig. 33 — Various terminals. 



good visibility. When smaller wires are used, the tendency is to make 

 the terminal width greater than three times the wire diameter for better 

 visibility. The terminal thickness depends to a great extent on the shape 

 of the terminal. For a rectangular terminal the thickness may vary from 

 three times to one-half the wire diameter. When the terminal thickness 

 is less than one-half the wire diameter, the terminal may twist too much 

 during the wrapping operation. 



TYPES OF WRAPPED CONNECTIONS 



The rectangular terminal is not the only terminal which lends itself 

 to a good solderless wrapped connection. Any terminal offering one or 

 more contacting edges substantially crosswise to the axis of the wrapped 

 wire will make a good connection. 



Since rectangular terminals of very thin material may twist exces- 

 sively during the wrapping process the preferred shape is a U or V as 

 shown in Fig. 33. These terminals are capable of storing even more 

 elastic energy than a rectangular terminal of equal cross sectional area. 

 The U and V terminals are particularly suited for vacuum tube sockets 

 and thin relay springs. 



Flattened or coined single wires as well as coined twin wires may be 

 used as terminals for solderless wrapped connections. These are shown 

 in Fig. 33. 



Stranded wire connections have been made by laying the strands 



