Builder's hardware; a manual for architects, builders and house furnishers . Fig. 37. & F. Corbin. soffit, the knob shank following the oblique cut in the plate ; throws the bolt down when the door is opened. The 34 BUILDERS HARDWARE. Chapter IV. action of Figure 37 is somewhat different. The bolt is mor-tised into the soffit or the bottom of the door-frame, and thetwo plates are screwed to the tops of the doors. For a bolt as.

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