No. 62972. 



Alternating and Three-phase Motors. Transformers. 



1007 





62 967 A. 1:5. 



62 967 B. 1:5. 



62 970. 1 : 6. 



62 969 A. 1:5. 



62 969 B. 1:5. 



62,967. Alternating Current Transformer (Core Transformer), Figs. A and B, for demon- s. d. 

 stration purposes; it can be taken entirely to pieces ............... I 3. 12. 



The transformer has the following coils: (1) the inner one having 196 turns; (2) an outer one with 

 28 turns; (3) an outer one with 686 turns. The following ratios can thus be established: 1:7; 3.5 : 1; 

 1 : 24. 



The transformer is suitable for A. C. pressures from 24 to 44 volts when the inner coils is used 

 as a primary coil, and the instrument therefore suits Machines Nos. 62,775/6 a. Suppose, for instance, 

 that it is used with Machine No. 62,776; the following pressures can be obtained: 





3 " 5 



l 



34 . = 4.8 Volts; 34 . " J = 119 Volts; 34 .= 1.4 Volts. 



7 1 24 



These pressures apply on no-load; they fall somewhat when load is applied. The thin wire ex- 

 ternal coil can also be connected for a short time to 110 120 volts. 



62,968. - - idem, for A. C. pressures from 7 14 volts, suiting Machines Nos. 62,774 and 

 62 787/9; Ratios: 1 : 7; 3.5 : 1; 1 : 24 



62,969. Alternating Current Transformer, 

 capacity up to 120 watts .... 



Figs. A and B, completely dismountable ; total 



The inner coil has 1000 turns; the five outer coils have 200 turns each and can be put in parallel 

 and series with the copper pieces supplied. The ratios 1:5, 1 : 2.5, 1 : 1.67, 1 : 1.25, 1 : 1 can be 

 established and it can be easily shown that the secondary pressure increases with the number of turns 

 of secondary. When using the inner coil as a primary the transformer can be connected to pressures 

 of 80 125 volts. 



62.970. Alternating Current Transformer (Core Transformer), Figure; ratio 1 : 10, for 

 primary pressures of 80 125 volts, secondary giving 8 12 volts; output about 100 watts 



On each core are wound a primary and a secondary coil over each other. 



62.971. - - idem, for connecting to pressures of 24 44 volts, suiting Machines Nos. 62,775/6a 



62.972. - - idem, for connecting to pressures of 4 14 volts; ratio 10 : 1, suiting Machines 



Xos. 62,774 and 62,78762,789 



3. 12. 



6. 0.0 



3. 12. 



3.12.0 



3.12.0 



Cl. 2778, 2777, 6052, 

 5095, 5093. 



