โ Scribed by Hatcher, E. C.
No coin nor oath required. For personal study only.
TIIcI~~ almost if not quite as important as spare parts for npplinnccs is tlic question of rclicf inen for sliillcd transport work. If n locomotivc, crnnc or lorry driver is n m y througli accidciit or illncss, is tlicrc nii~-o~ie t o tnkc liis place ? Yct thc nbsciice of a relief is as bad as if tlic niacliinc wcrc disnblccl, wliilst the ciiiploymeut of nil incspcricncccl innii niny result iii nccidcnt or dninagc.
Clicnp niid cfficient transport is undoubtedly a vcry importnnt factor in works economics ; in fact, it may bc truly described as one of the ninin csscntinls of succcssftil working, so tlint i t descrvcs, and will amply repay, very careful study ; and i t is Iiopcd tlint this short article inny prow iisefiil in calling iittcntion to some of t.hc more important economic aspccts of tlic question.
By MAJOR E. C. HATCHER
Possibly tlic most iiuportaiit pnrt of a convcyor is its power trniismission systcni, conscqucntly, time givcn to :I carcful coiisidcration of the most suitnblc form of drive for n particular typc of conveyor is wcll invcstccl. Gcncridly spenkiug, tlicrc nrc four foruis of drivc, cncli of which, uiidcr ccrtain circiinistnnccs, has nicrits of its own ; tliesc nrc as follows :-1. Uclt clrivc 2 . C'linin drivc 3. Open gcnr clrivc .I. Totally-cncloscd gcnr drivc. Thcrc arc, of coursc, also various conibiiiatioiis of the four systems. To considcr tlic incrits of each systcm it is as well to keep in mind ccrtaiu factors : ~it~mcly, cost of transmission unit, cost of instnllntion, durability, clliciciicy, amount of space takcii up, silcucc, nncl ncccssibility.
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