TRIGGER HOUSING
- (LUCITE)
=
|
PHOTOTUBE —__
i
.
==
TUBE
3
MOUNTING PLATE “2
a Set
e
4
Hi
ibe?
PHOTOCELI. —__|
PHOTOCELL
:
MOUNTING BRACKET
she
wet
L_|
DIFFERENTIAL FALL-OUT COLLECTOR
TRIGGER UNIT
Fig. 3.3—~Light-actuated trigger mechanism.
22
TFe tm Or Ue tee MN aes
CANOPY—.