By Ragnar Holm
This booklet is a very revised and rewritten version of "Electric Contacts instruction manual" released in 1958. loads of new in vestigations are thought of, and lots of of the elemental theories are revised intimately or even as a rule. The physique of data needed to be restricted because it used to be now not really useful to extend the amount of the publication. particularly, no try out used to be made to hide the entire useful purposes. they seem as examples following centred reasons of easy phenomena. As in different branches of know-how, the options of difficulties ari sing within the box of electrical contacts contain perception into numerous disci plines of physics. it's feit that experiences of a few of these themes, especi best friend tailored to electrical touch phenomena, are welcome to many readers. for instance, chapters were dedicated to the constitution of carbon, the band idea of electrical conduction in solids, convinced professional blems in facts, and the idea of the electrical arc. As regards arc difficulties, new rules were brought. so one can make the most textual content much less bulky, such studies are offered as appendices. all through this version, the mksa-unit approach is utilized in accord with the newest advice for standardization of devices in clinical and technical writings. The bankruptcy "History of Early Investigations on Contacts" forming half IV within the previous version of 1958 has no longer been repeated during this book.