N.I. Ii2737. 



Dynamos. Explanatory Models. 



987 



62 734. 1 : 7. 



62 735. 1 : 0. 



62733. 1:8. 



62737. 1:12. 



Dynamos. 



Explanatory Models. 



62.733. Apparatus for Explaining the Magnetic Induction of Magneto Electric Machines and s. d. 

 for explaining the Pacinotti and Gramme Rings, Figure. Stand with two fixed wire 



coils and two rotary semi-circular magnets (M. P. 9 th Edn. Ill, Fig. 649) 2. 8. 



62.734. Model of a Pacinotti-Gramme Machine, after Pfaundler, Figure 5. 0. 



The Model can be worked, can be used as a series or shunt motor, and, used as a dynamo, gives a 

 current which can be shown by a vertical galvanometer. If the magnets are excited by a separate source 

 of electricity the current generated is strong enough to work a bell. 



62.735. Model of a Pacinotti-Gramme Machine, Figure (W. D. Fig. 565 [538]), with ring 

 armature arranged very comprehensively. The machine can be used to generate a current, 



also to rotate under the influence of a current 2. 15. 





52,067. Model of a Pacinotti-Gramme Machine, after Pfaundler, F i g u r e, on p. 288 (M. 

 P. !"' Kdn. Ill, Figs. 659 and 660), for the Whirling Table, with device tor demonstrating 

 the lines of force 6. 10. 



The following pertain to the apparatus: an iron armature, wound; an iron armature, unwound; 

 a wood armature with winding and a frame stretched with paper for demonstrating the lines of force. 



62,737. Model of a Magneto Electric Machine, Figure, after Friedr. C. G. Miiller (M. T. 

 Figs. 227 230), with one each wound Siemens H Armature, ring armature, drum armature 

 and an unwound drum- armature . 



4. 4.0 



Cl. 2691). f.Hii, 

 2697, 4511. 



