Intermediate spindle (shaft
)
(Figs. 37
and 38)
The radial warpage of the gear wheel
(3)
fig.
37
in relation to the shaft
(9) must not exceed ±0.05 mm and the axial warpage ±0.01 mm. The
axial play of the gear wheel in relation to the intermediate shaft
(9)
should be
0.07-0.1
min. The impulse wheel
(4)
warpage must not exceed
0.2
mm. The detent springs (5-6) should engage properly in the locking
slots of the impulse wheel and dog washer. In the initial position of the
impulse wheel (fig.
38)
the end of the detent springs (5) should lie
0.2-1
mm inside the edge of the locking slot. The impulse cams must not be
in home position or touch any of the impulse springs during operation
of the dial.
The axial play of the intermediate shaft should be
0.07-0.3
mm.
Governor rotor
(Fig. 39)
The governor should, when rotated slowly, function quite freely and
there should be play between the governor cup and the base.
When rotating fast, only the friction shoes (1) should touch the wearing
surface
(2)
of the cup.
The sliding surfaces of the friction shoes should be smooth arm, whole
and have no traces of fluff.
The sliding surfaces of the friction shoes should be smooth and free
from porosity. The governor axial play should be
0.07-0.25
mm., (the
play is adjusted by bending the tongue of the bearing plate).
Base plate
(Fig. 40)
The base plate should be free from scratches and its figures and other
symbols should be well filled with paint. The paint should be evenly
spread, especially around the number frame and should have no
impurities.
The finger stop and internal wall of the well should have no traces of
paint.
The number plate window should be clear and free from impurities and
its edges should be even and sharp.
The boundary line (a) around the edge of the finger stop should be free
from burrs and sharp edges.
The base plate should be concentrically placed in relation to the case
(housing).
Neoprene gasket
(Fig. 41)
The gasket should be fitted so that it presses evenly against the edge of
the dial plate and so that the outlets in the projecting edge are opposite
the rubber tabs of the case. The studs (1) for holding the subscriber
number
(2)
in place should fit in the intended outlets in the case
pressed against the base plate (3).
Spring housing
(Figs. 42
,
43
and 44)
The entire driving spring should lie inside the spring housing. The ends
of the spring should be properly bent. There should be play between the
outer end of the spring and the well of the finger wheel.
10
