Builder's hardware; a manual for architects, builders and house furnishers . the pulleys and inrperfect arrangement of theboxes rather than to any intrinsic deficiencies in the sys-tem, have given rise to several so-called sash-balances, whichare intended to permit of weights, boxes and ropes being entirelydispensed with. Indeed, the natural outgrowth from the ideainvolved in the Acme sash-cord would be that a plainspring could be made to answer the purpose of both weight and 1 There are but two sizes of solid-link chain. They are tested by the makers at200 lbs. and 300 lbs. before leaving the
Builder's hardware; a manual for architects, builders and house furnishers . the pulleys and inrperfect arrangement of theboxes rather than to any intrinsic deficiencies in the sys-tem, have given rise to several so-called sash-balances, whichare intended to permit of weights, boxes and ropes being entirelydispensed with. Indeed, the natural outgrowth from the ideainvolved in the Acme sash-cord would be that a plainspring could be made to answer the purpose of both weight and 1 There are but two sizes of solid-link chain. They are tested by the makers at200 lbs. and 300 lbs. before leaving the factory. 118 BUILDERS HARDWARE. Chapter VII. cord. This has been done with the Anderson 173, which consists simply of a steel, spiral spring foreach sash, from f inch to -J inch in diameter. The springs arefastened to the hanging-style of the window-frame and to thesashes, and are made of just sufficient strength to sustainthe sash in any position, so that a very slight exertion is sufficientto move it either up or down. The springs are made the same. Fig. 173. Anderson Sash-balance. Wm. G. Anderson. Fig, I 74. Ormsby Sash-holder Co. length as the sash; and, being secured near the bottom of thesash, are drawn out to twice their length when the sash isdown. When a sash is hung with this kind of balance, it hasto be fitted with some form of self-catching sash-fast, as other-wise the window might ny open as soon as the hand was with-drawn. Anderson uses the Attwell sash-fast for this pur- PULLEYS. 119 pose, which will be described in a subsequent chapter, thoughany other self-locking form would answer equally well. Theretail price for the four springs necessary for two sashes weigh-ing fifteen pounds each, is $ For forty-pound sashes theprice is $, and other sizes in proportion. When the sashesweigh over fifty pounds, the size of the spring requiredbecomes so large as to render it rather too conspicuous forordinary use. The Ormsby
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