Flexibility in overhead construction to dampen out vibration and to reduce trolley pole tension and resultant wear is condition to be desired; in Germany special study has been made of overhead construction for use by trolley buses which are becoming increasingly popular; illustrations give some idea as to construction of flexible type of overhead recently developed in United States.
Overhead flexibility for trolley bus
Elec Traction
Electric Traction ; 29 , n 7
1933
Article (Journal)
English
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Specifications for overhead trolley construction
Engineering Index Backfile | 1913
Designing trolley bus overhead system
Engineering Index Backfile | 1932
|Overhead construction for trolley bus
Engineering Index Backfile | 1929