Cyclopedia of architecture, carpentry, and building : a general reference work . 31 the running face is often styled a 2^-inch wheel. The money investedin such a wheel is gained many times over in saving the annoyanceand expense of broken sash-cord. If the pulley is steel-bushed and has roller bearings, it will bebetter in the long run, and these items add little to the expense. Therunning face of the wheel should be smooth; and all parts may beof iron, without detriment to the appearance or the usefulness of thefixture. A plain brass or l^ronze face and wheel areto be preferred, however, ifth
Cyclopedia of architecture, carpentry, and building : a general reference work . 31 the running face is often styled a 2^-inch wheel. The money investedin such a wheel is gained many times over in saving the annoyanceand expense of broken sash-cord. If the pulley is steel-bushed and has roller bearings, it will bebetter in the long run, and these items add little to the expense. Therunning face of the wheel should be smooth; and all parts may beof iron, without detriment to the appearance or the usefulness of thefixture. A plain brass or l^ronze face and wheel areto be preferred, 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 extra for makingthe frame special in casethe larger wheel is brass wheel with rollerbearings and brass face willcost about three times theabove price—or, possibly,50 cents extra for 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 pulleys dispense with the neces-sity for lead weights, which are expensive and are usually crowdedinto boxes so small that they work unsatisfactorily. By the use ofcombinations of these pulleys, the cord can be carried an indefinitedistance to a box capable of receiving a large iron weight, and 343 32 HARDWARE the width of the mulUon can be reduced to the minimum thick- ness. Sash-cord is a very important item, and braided cotton cord isprobably the cheapest in the long run. It is better to get a smallrather than a large size. The wearing of the cord is due to the factthat in passing over the pulley the inside or th
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