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1 44
T Y P E
6 0 3 E L E C T R O N I C
M U L T I P L I E R
Figure 128. Product Counter Read-out Circuit
only during read-out time by
P14
cam contact.
The potential drop across the punch magnet is 40
volts and across the power tubes, 100 volts. I t will
be observed that the cathodes of the power tubes
are not at ground potential because the punch
magnets are connected to ground.
At the mid-index point following the turning
ON
of W 1 trigger, it is turned
OFF
by B28 power
tube, as shown in Figure 129. Each time B29 goes
OFF
(at mid-index points) a positive pulse passes
to the B28 power tube, which is normally cut off;
B28 momentarily conducts and produces a nega-
tive pulse at the midpoint of its load resistor. This
negative pulse passes to the
ON
side of all read-out
triggers to turn
OFF
any that happen to be
ON.
This is illustrated in the block diagram of Figure
126.
To P - 7 , P - 0
To P-5.P-6
4
Mob. o l punch m C 1 l i n n l
(Mob. 01 mid-index l8n.s
)
f
PUNCH UNIT
---
T O Car,,
OVlPYt
Prod Counlar Po.
I
T
I
I
.--
-too--.
concal
-
I 0 0
Concal
Figure 129. Triggering Off o f Read-out Triggers at Mid-Index
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