. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. TELPHERAGE. 277 examples of much more than experimental work, namely, merely con- veying material Ix'tween two points, o'encrally in a straig-ht line, placed in some vacant lot or loft, and tluu'ii seemed to he a desire to force the method of transportation according to certain preconceived ideas, rather than to pay the necessary attention to its commercial adaptation. Coihstru<'th»i.—On account of various advantages in regard to the dis
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. TELPHERAGE. 277 examples of much more than experimental work, namely, merely con- veying material Ix'tween two points, o'encrally in a straig-ht line, placed in some vacant lot or loft, and tluu'ii seemed to he a desire to force the method of transportation according to certain preconceived ideas, rather than to pay the necessary attention to its commercial adaptation. Coihstru<'th»i.—On account of various advantages in regard to the distribution of material—such as depositing at an elevation—most of the telpherage plants thus far installed have l)een overhead. As engi- neers, you will be most interested in hearing what has been accom- plished. The descriptions are, therefore, contined to overhead work. Under the head of construction, it may be stated that the track is made. A a c o E F H I J K LI 1 Fifi. ].—Supporting pole, double line. One of the simplest iiutliniis oi pole construction lor double lines. Especially reconinicnded for long lines and wlici'c trees are available. of cabl(>, especially drawn, cither of standard wir(^ or lock coil type, which latt(M- has a strength approximating ;) ])er cent that of the solid bar, or else solid rail, either of Hat, girder, or ])\\\h type. The cal)le tracks are supported every 100 feet, provided it is con- venient to ei-ect poles or structures. Wher(\ thei'e ar(>. deep ravines or l)etween u[)])er stories of factories, the span is made to correspond with the distance, and ctui be made of any reasonable length. In addition to th(> track cable, upon which the telpher runs, thcM'e is also what is known as the suspension cable. As is well known, it would be impossible to prevent considerable sag in the track cable and then^- fore the track cable is suspended from this suspension cable by means. Please note that these images are extracted from s
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