212 



A. DAIGGER & COMPANY, CHICAGO, U. S. A. 



503 



3503(a) 



3503 MOTOR, Series Intermittent Service, alternating and direct current. Machines 

 or devices that have a fixed load can be successfully driven by series type 

 motors, but where the load varies and it is necessary to maintain a con- 

 stant speed at all times, regardless of the load fluctuation, this type of 

 motor will not answer the requirements fully. For uses such as driving 

 small fans, air pumps, centrifuges, etc., these little motors will be found 

 preferable. 



Data 



3503(a) MOTORS, Electric. These motors are for direct current, and are guaranteed 

 by us to be thoroughly first-class for laboratory use. They are of the 

 bi-polar construction, having an external appearance somewhat similar to 

 the alternating current type. The two end shields are made separate from 

 the field frame, allowing free acQess to the internal parts. 



Pulleys Single groove for round belt, 2-inch pitch diameter, furnished 

 with Nos. 28 and 26 frames; 2^-inch pitch diameter furnished with No. 26s 

 frame. 



Data 



