The Norden Bomb Sight manual

SUBSTI-

TUTES FOR

THE PRES-

CRIBED

EQUIPMENT

USED IN

CALIBRAT-

ION AND

MAINTENANCE

BOMBSIGHT

COVER

TYPE A-!

1.

When & hypodermic needle is not available

for oiling

¿ plece of small wire may be used.

drop of oil will run down the wire very easily or

m & y

be picked

up on the

2.

the

absence of a continuity tester a

test light may

be rigged up to check continuity.

Of course

no

reading can

be obtained,

Lut the improvised instrument is

an accurate check

and grounds.

The light may be made

from any avallable materlal, even & flashlight.

Instruction

for 12/24 volt Changeore: =

shipped from the factory, covers will

be connected for 24 volt use.

To change from 24 volt wiries to 12 volt

wiring:

2. Holding the terminal block so that the

connector cord is down, remove cover of terminal

with Phillips Head

screw driver.

heater wire.

terr on the lett

the screw

at the top of the top

bus bar on the left hand side, and disconnect the

Secure this wire to the unused

term-

inal of the top

bus bar on the

right hand

side.

Draw screw down

firmiy.

Similarly,

disconnect wire

from the

bottom screw of the top bus bar on the left hand

side,

secure it to the top terminal of the

bus

bar directly

below.

e.

CAUTION:

bus bars are separated by

fibre separators,

be sure separators are

replaced

to avoid

f. Never roil or

fold this cover.

g. Replace cover.

h.

Prominently mark cover, or attachment

plug, "12 Volts"

3. To change

over from 12 Volt wiring to 24

"Holding the terminal block so that

the connector cord is down, remove cover of the

terminal block with

Phillips head screw driver.

Loosen the

at the top of the

top

bus bar on the right hand side, and disconnect

the

heater wire.

Secure this wire to the unused top

terminal

Of the top bus bar on the left hand

side.

firmly.

Similarly, disconnect wire from the

A

for

shorts

When

c.

b.

of

the

top

bus

bar

on

the

left

hand

Draw

screw

down

d.