No. 62783a. 



Dynamos, etc. 



993 



62782. 1:8. 



62 783 b. 1:12. 



62774a. 1:12. 



wpiking. They can also be used as D. C. Motors. Nos. 62744 62 776 a and 62,781 to 62,783 a each have four 

 slip rings to which the corresponding points of the armature winding are connected and can also be used 

 for converting Direct Current into Alternating or Three-phase Current by allowing them to run as electric 

 motors and taking off Alternating or Three-phase Current at the corresponding terminals. With Machines 

 Nos. 62,770/3 it is possible to drive, at the corresponding voltages, the D. C. Motors Nos. 62,768 and 62,834 (which 

 should in this case be ordered for the proper D. C. voltage); and with Nos. 62,774/6 a the 2-phase A. C. Motors 

 Nos. 62,909/14 and the 3-phase Motors Nos. 62,906, 62,907 and 62,912 (of. the precise details in the list of Motors 

 referred to). With the A. C. transformer No. 62,967 or 62,968 and the 3-phase transformer No. 62,974 or 62,975 

 respectively the voltage can be increased and this transformation shown by glow lamps. For this purpose use is made 

 of the lamp stands Nos. 62,797, 62,802 and 62,803 respectively. With each Machine are supplied four metal blocks and 

 four screws by the aid of which the dynamos are screwed on to the lecture table. The blocks are let into the wood 

 by a joiner. 



A pamphlet describing experiments is supplied with the Machine. 



It is well to mention here that hand drive with the driving stand is a somewhat tiring operation being only 

 adapted for short experiments. The driving stand for Nos. 62,780 and 62,783 a is driven by two persons (cf.Pig. 62,783 b). 





Larger Dynamos for Power: see Vol. I of this 

 Price List, p. 147. 



Cl. 2749, 



6015, 2750, 4953. 



63 



