TM 9-1290-357-15
Table 4-1. Special Tools, Equipment, and Fixtures -- Continued
References
Use
Identifying
Item
number
Fig.
Para
To hold collimating telescope
4931-612-1110
HOLDER, telescope,
18-T-540-250 during set-
collimating
up of azimuth test fixture
4-H-2374-125
4931-769-1596.
4931554-9108
Used with collimating tele-
TELESCOPE,
scope holder during setup
collimating
of azimuth test fixture
18-T-540-250
4931-769-1596. Also can
be used in place of
dioptometer 4931-536-5557.
To simulate conditions of
4931-5365555
TESTER, universal
shock and handling the
vibration 7560085
aiming circle could receive
during normal use.
For telescope bracket
5120-757-5874
SCREWDRIVER,
screws 5305-550-3844.
special, offset,
aiming circle,
length 3 inches
Orienting worm ball
5120-595-8996
WRENCH, spanner
cap 1290-513-2032.
face, 0.07 dia pin,
No. 2
Magnifier cell assembly
5120-345-1381
WRENCH, tubular,
1290-613-5660.
dble-end, concave
inserted blade,
size 0.500 and
0.516 in. (1/2
and 33/64 in.)
Reticle retaining ring
5120-345-1384
WRENCH, tubular
5039586.
size 0.594 and
0.609 in. (19/32
and 39/64 in.)
Reticle cell, eyepiece retain-
5120-345-1388
WRENCH, tubular
ing ring and objective cell.
size 0.719 and
0.734 in. (23/32
and 47/64 in.)
Adapter retaining ring.
5120-345-1393
WRENCH, tubular
size 0.906 and
0.922 in. (29/32
and 59/64 in.)
provided with a clamping screw so that it may
4-7. Collimator
be secured to the collimator. The lamp housing
is equipped with a 7 1/2-watt lamp assembly
tical device similar to an ordinary straight tube
and an extension cord with a plug and switch
telescope except that it does not require an erect-
for use with a 110-volt source of current that
ing system. When in use, it is sighted into through
provides illumination for the collimator. The col-
the objective end instead of the eyepiece end.
limator contains a reticle of which the reticle
The collimator serves as a convenient indoor test-
pattern is graduated in mils, and the 1mil toler-
ing target in the adjustment and inspection of
ance can be accurately made. Smaller tolerances
aiming circle M1. The target it provides is always
can easily be estimated. Resolution marks on the
uniform as far as intensity of illumination and
reticle are provided to aid when checking defini-
clarity of the image.
tion of the aiming circle's optical system. The
b. Detailed Description. The collimator is a
positioning of the objective lens of the collimator
telescope with its eyepiece end machined to ac-
is controlled by the adjustable objective scale
commodate a lamp housing (fig. 4-1) which is
