Builder's hardware; a manual for architects, builders and house furnishers . Fig. 51. Espagnolette-bolt. BOLTS. 43 employed, the fixture then being designated as a check-bolt or chapter Figure 53 illustrates one form of door-fast (Nichols, Check-bolts. Ft ® ©? L. Fig. 52. Chain Door-fastener. P. & F. Corbin. Bellamy & Co., agents). The staple-shaped bar or rod works in a standard whichis screwed to thedoor-jamb, and fitsover a knob securedto the door. Thedoor, on beingopened forces theknob along betweenthe prongs of thebar until it can gono farther, permit-

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