Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 420
referred, however, ifthe small additional expenseis not a bar. The pulleys usually putin stock frames are H-inchiron pulleys costing about50 cents a dozen; and 10cents a dozen is usually ad-ded for each additionalquarter-inch in the diameterof the wheel, though themill man will often wanta little… … Section of Pulley and Pulley-Style; Show-ing also Sash and Weight. There are on the market very useful pulleys over which thesash-cord can be carried to boxes several feet away (Fig. 49). Pulleysof this type can be used where the mullions between windows are toosmall to carry the weights. These…
Architecture · Building
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