OPERATION 'DRAGON RETURN' - DIPL ING WALTER DIRBACH

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000500760053-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 16, 2016
• Document Release Date: September 3, 2003
• Sequence Number: 53
• Publication Date: April 30, 1952
• Content Type: REPORT

Approved For Release 2005/06/01 : CIA-RDP80-00809A000500760053-7
Approved For Release 2005/06/01 : CIA-RDP80-00809A000500760053-7
 Approved For Release 2005/06/01 : CIA-RDP80-00809A000500760053-7
25X1 25X1
_.j~C a+ETJ
Chem
ical
Com
o?
ition
Type of Glass
Maker
Si02
Tl.;O
&1 2 0
CaO
MgO
Ba0
PbO
ZnO
Na20
K20
Lead silicate IB
71.0
-
-
6.3
-
-
5.3
-
1041
16-7
hr 16
70.0
-
-
3.8
-
-
0.4
-
11.0'
4.8
VI B
66?0
-
1.0
2.5
-
-
4.5
9.0,
7.0
C - 1
Corning
'USA
62.0
-
2.0
-
-
-
20.5
-
7.7':
6.0
3C-4 (Nr 12)
Nii 160
55.0
-
1.7
0.3
-
-
30.0
-
3.8
9.2
Dolomitglas Nr82
74.0
-
-?
5.8
3.6
-
-
-
16.6
-
Nr71
73.3
-
0.4
5.4
3.9
-
-
-
17.0
-
G-8
Corning
j
USA
70.8
-
1.6
5.5
3.8
-
-
-
16.2
0..7
Bari ,glae GA 1
69.4
?-
-
5.5
3.5
54
-
-
12.5
4.1
n Nr.:?112
..
71,5
-
-
:;
j
1.5
7.
--
-
10.0
5.5
Nr 23
68.4
2.7
3.9
8.5
-
-
-
-
9.41
7.1
Nr 23
Nil 160
68.39
3.66
3.89
8.5
-
-
-
-
9.4
7.14
Molyrbdaenglao -
Nr 46
68.0
17.5
3.0
-
-
-
-
5.0
6.51
-
Nr 46
Nii 160
66.75
20.25
3.5
-
-
-
-
-
3.91
5.35
" 0-705A3
Corning
USA
67.0
22.0
2.0
-
-
-
-
-
?5
? 30-5
68.0
20.0
3.0
-
-
-
-
-
4.0
5.0
N4 35
63.0
24.9
1.5
-
-
-
-
-
9.1
1.5
NoAea
Corning
USA
73.0
16.5
-
-
-
-
6.0
-
.5
Pyraz
Corning
USA
80.8
12.0
2.2
0.3
-
-
-
-
4.1
0.1
ENCLOSURE (A)
25X1
Approved For Release 2005/06/01 : CIA-RDP80-00809A000500760053-7
 Approved For Release 2005/06/01 : CIA-RDP80-00809A0005007600521
25X1
VACUUM TUBE (LASS USED IN TEE USSR - 1945-50
P
aioal Prop wbiea
~p4`of
T
Temp.
Annealing
Co-e fie en
,
Q1FOY
Purpose
Strain Point
Point
of Expansion
? . 25.1013
17 - 109
at -107
B
Rx and Tx valvec
510-530
87-90
25-100?C
Zr 16
Tubeft rods, lamp
-
?
. pinohea
460
490-510
67
90
23-100
C
IT 8
Tubes., pinohoe/base
for 8x valves
450
480-500
87-90
25-100?C
425
92
25-325?c
3C-4
425
475-490
85-89
0-310?c
:J r 82
Lamp and Rx valve
2
00
envelopes
500
520-550
88-92
5-1
?C
7?; :.-~
^ ^
500
510-530
87-90
25-100?C
Glass tube for but-
510-540
86-90
25-100?C
"ton bases, lamps
and small valves
?
Nr .112
510-550
87-90
25-100
C
x.tg
Envelopes and tubes
for".Tx, 1C=Tay and
0the5c''larger
valves
530
570-590
84-87
25-100?C
hr 46.
550
580-600
46-48
25-1000C
3-1C:.-5
515
560-570
48-50
25-100?C
Nr 35,
560-580
52-56
25-100?C
792 P
520
580
36
25-325?C
pyrex
Sinoecopee
560
620
33
25-325?C
ENCLOSURE (B)
SECRET
25X1
Approved For Release 2005/06/01 : CIA-RDP80-00809A000500760053-7