Contact conductors and collectors for electric railways

A general classification of collecting devices is given corresponding to the existing A. I. E. E. classification of contact conductors. Contact rail systems and contact wire systems are considered along with their corresponding collectors. Many data derived from measurements made upon different types of overhead and collecting devices are arranged in the form of curves. The application of these various curves are discussed and the possibilities indicated for selecting other curves to still further express the factors essential to proper collection. This method of attacking the problem is a novel one and it is hoped that those interested in furthering the cause of better collection will be encouraged to assist in making further measurements. Examples are given of constructions where consideration has been given to the factors discussed. Suggestions are made as to profitable subjects for discussion.