IBM 29 User Manual

Credit Read-out, Punch-out
• The operator presses the dash key for a credit field.
• The information is read out and punched.
• The units column is multi-punched.
Description
The operator presses the dash key, energizing the nec-
essary relays to start the read-out and punch-out, also
relays to remember that it is a credit field. A dummy
cycle must be taken first to read out the first digit to
be punched. Each cycle will read out the next digit
to be punched. When the end of the field is recog-
nized, an extra cycle must be taken to punch the 11
punch. This cycle is a multi-punch cycle to prevent
escapement from the units position of the field.
Read-out, Punch-out Cycle 1: Refer to Figure 1-11
for timing within cycles. The operator presses the dash
key, closing the dash-latch contact. This energizes the
credit-field 1 relay ( 336), read-out relay ( 326), and
the punch clutch. As soon as the credit-field 1 relay
( 336) is up, the credit-field 2 relay ( 327) is energized
through N/o points of credit-field 1 relay ( 336). The
N /c 3-point of read-out relay ( 326) prevents the trans-
fer of information from register to register.
CREDIT FIELD PUNCH OUT CYCLES (DASH KEY)
1
1
I
I
---
First Second
Third
Fourth
Last
90
180
270 0 90 180 270 0 90
180
270 0
90
180
270
90
180
270
Starwheel 7,8,9
J
1
Starwheel 4
r
I
£
F
I
')
I
R315 I 324, 325
I
"l
R304
J
R309
r-!:
175-
1
P4
P2-79
175-P4
P2-79 175-P4
P2-79
175-P4
P2-79
l~~-P4
'l
+---+
Key Pressed
1'< Dash Key
R336
P2-79
R327
P7j0
Rl 13
79 336-4 321-3 To
-i
11
A
11
Register
10-P3 P6-158
10-P3 P6-158
11 I I I
11
8
11
Register
326-3 Stwh.8
f2-79 ~-P5 _
JP2-79
1
11
A
11
Register
P7-lb 60-i6 P7-lb
60-P6
P7-10
Interposer Magnet
~
lJ
P3 8~
lJ
J
1
P3 8J 166
l
86 P5 166
~,,
f;;si. , S'
~·1
~1
Punch Clutch
Pl
0
Pl
0 r Pl
Note 1
180
Pl
0
18~ I j
Note 2
Escape Magnet
18~ 18~
Keyboard Restore
28-P6
Pl
Pl
Pl 317-5 10
r ..u·
R326
336-1
1
~17-2 lO
R317
326-2, P-5
P7 To
field Size Relay
Stwh.3
1
Note 1 The 11 Interposer Magnet
Note 2 Punch Clutch Energized by Interpose Bail Contacts.
Figure 1-11. Punch-out Timing ( 3-Column Credit Field )
1-13

IBM 29 Specifications

General

Brand	IBM
Model	29
Category	Computer Hardware
Language	English