Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 415
Fig. 3S. End of ExpandingSpindle. against the sides of the slot in the shank (see Fig. 39). In practice it is found that this screw when set hard against the wedge does not work loose; before it is set, the knob can be most delicately adjusted without washers; and if the screw should work loose,… … 40. Knob-Holding Device, Adjustedby a Thi-ead.
Architecture · Building
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