Chapter XCIV: Section 2: Adjusting Devices

(_See also p. 10._)

=1939. Ratchet rod= for adjusting and locking a lever in any required position.

=1940. Micrometer screw adjustment= for a lever or crank arm, which may be locked to its shaft by the clip boss and screw, or released at will.

=1941. Spring pawl adjustment;= has sufficient grip to hold against a moderate pressure, but may be moved by increased pressure.

=1942. Micrometer adjustment= for a cam lever grip.

=1943. Micrometer screw,= with swivel motion.

=1944. Wedge and pinion adjustment,= used for applying pressure to type in printers’ formes.

=1945. Adjustable rack= for any fixing, secured by a staple bolt.

=1946. Adjustment for a spiral torsion spring= to regulate its tension.

=1947. Callipers with fine adjustment= by a taper screw, tapped into a hole in the split leg, so that the taper screw springs open the slit and thus extends the opening of the calliper legs.

=1948. Adjusting pawl and head= for adjusting the tension or compression of a torsion spring, which is fixed to the spindle.

=1949. Screw adjustment for rollers= to maintain parallelism.

=1950. Adjustment for expanding a split borer,= reamer or rose bit, with micrometer graduation.

=1951. Screw adjustment= for a lever.

=1952. Adjustable centre pin,= traversed by a screw, and fixed after adjustment by a nut and washer.

=1953. Fine screw adjustment= for any movable part.

=1954. Fine screw adjustment= for a radial arm.

=1955. Division plate,= with differential dividing on its opposite faces.

=Belts, bands, &c.,= are adjusted by corresponding series of holes and
laces, screws or rivets to fit them.