ABSTRACT
Figure 18.2 : These locks vary in length (depth) between 64 mm and 150 mm. The deeper locks ( Figure 18.2(b) ) are of traditional size to receive doorknob furniture which consists of a spindle, two knobs (sometimes one of these is already attached to a metal spindle, the other being removable via a small grub screw), two rose plates, and two escutcheon plates ( Figure 18.2(e) ). The shallow-depth lock ( Figure 18.2(a) ) has its keyhole and spindle hole vertically in
line to receive a set of lock lever-furniture ( Figure 18.2(d) ). Both types of lock have a striking plate ( Figure 18.2(c) ) which is housed into the jamb to receive the projecting latch and the turned bolt. Shallow-depth locks should only be fi tted with lever furniture, as door knobs come too close to the face of the jamb or lining on the door-stop side, resulting in
possible scraped knuckles. If door knobs are to be used, the lock should be at least 112 mm (4 12 in) deep.
