Edison Electric Light Company vs. F.P. Little Electrical Construction and Supply Company et al Volume 281; No. 576; On Letters Patent (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 Excerpt: ...on the part of electrical constructors and operators, and on the part of the Fire 951 Insurance Underwriters, which resulted in bringing about a substitution of these devices for all prior forms, between the years 1885 and 1890. The hard end safety-fuse links first made and advertised by Bergmann & Co. in the Catalogue Supplement to which I have referred, were, I think, produced primarily because of the necessity of making as small a device as possible for use above the canopies of fixtures, at the point where the conductors of the building are joined to the wires which extend through the fixtures to the lamps. It was also found very early that the fuse wires which were necessary in what were known as "attachment plugs" (adapted to be screwed into an ordinary lamp socket for the purpose of extending a flexible conducting cord to a desk lamp or pendant), were, if arranged as a hard-end link, much more reliable in their operation and more easily replaced in the small space available within the body of the plug, than a simple soft wire with 953 out hard metal ends. Thus it appears that the first forms of fusible hard metal links which were advertised in a regularly printed catalogue of Bergmann & Co., are shown in No. 5 of their series, on page 62, as of small size and adapted to fixture cut-outs only. They are there represented in connection with devices numbered 241, 252, 253, 399 and 1116, the last one being the pattern which had been temporarily shown in Supplement No. 4, already alluded to. Even in this No. 5 catalogue, which was, I think, issued about lS86, I do not find these hard end links separately described or included in the price lists. In the next issue of the catalogue, No. 6, appear illustrations of two forms of hard end links...