Kidder, Frank E. (Frank Eugene), 1859-1905, Nolan, Thomas, 1857-1926 · New York : W.T. Comstock · leaf 373
hematerial of which it is made andwhether it is a wrought or cast knob. For mineral and cast metal knobs the more common shape is thatof a flattened sphere, as shown in Fig. 394. Cast bronze knobs andBower-Barffed iron knobs are also made ball shape, which usuallyadds a litttle more to the cost.… … Fig 394.—Yale Triplex Spindle. FINISHED HARDWARE—LOCK TRIMMINGS. 371 to the trade as spun knobs, they are made of two pieces of metal,shrunk together, and to the shank, as shown. Spun knobs are lessexpensive than cast knobs, and cannot be made without a beador edge where the parts are joined, the…
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