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M E C ' H ' A N I C A L P R I N C I P L E S
A
STUDY
of the mechanical principles of this ma-
chine is limited to the read and punch uni.t, because
the only mechanical units on the electronic unit
are the blowers. Only the locarion of parts on the
electronic unit will be given in ,this section. T h e
read and punch unit is essentially the same as a
gang summary punch, and covers are removed in
exactly the same manner.
Location of Parts
The five general views of the read and punch
unit in Figures
7
through
11
show the location of
all parts and units which are visible at a glance.
Certain other features not readily visible must be
illustrated schematically.
The front view (Figure 7) shows the card lever
contacts which are mounted on a plate a t the front
of the machine.
The contacts have been placed
ourside for convenient access, although the card
levers remain in the same relative location as in the
gang summary punch. Also visible from the front
is the cam contact unit located directly under the
hopper and a portion of the rube power supply
chassis located on the lower base. T h e tube power
Check Brush
CLC
Entry
Brush
CLC
: : n E : "
Die CLC
/
Unit
Relay
Figure 7 . Read and Punch Unit-Front
View
10
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