ERICSSON SWITCHBOARD No. OB 450


768.jpg (11731 bytes)Type OB 450
Wall Pattern Switchboards
Metallic Circuit
Local Battery System

OB 450/12 shown

THE CONNECTIONS ARE MADE BY MEANS OF PLUGS AND CORDS.

FRAMEWORK
Polished walnut. The jack and indicator field is covered with fibre.

EQUIPMENT
1 JACK for each line.
1 PAIR OF CORDs and 2-point plugs (see table for number of cord circuits on each board).
1 SPEAKING AND RINGING KEY for each cord circuit.
1 RINGING BACK KEY.
1 CALLING INDICATOR for each line.
1 CLEARING INDICATOR for each cord circuit.
NIGHT BELL.
NIGHT BELL SWITCH.
GENERATOR. RH 4000, 4-magnet.
MICROTELEPHONE. RE 5052, with cord RS 7021.

TYPE

No. of Metallic ccts

No. of cord ccts

Height ins

Width ins

Depth ins

Weight in lbs.

OB 450/6

6

2

21.85

9.53

11.53

29.76

OB 450/9

9

3

21.85

9.53

11.53

31.97

OB 450/12

12

4

21.85

9.53

11.53

37.50

OB 450/16

16

4

24.40

11.50

11.53

40.80

OB 450/20

20

5

24.40

11.50

11.53

46.30

OB 450/25

25

5

29.96

13.26

11.53

50.71

OB 450/30

30

6

26.96

13.26

11.53

55.12


Taken from the Ericsson Telephone Catalogue 1914

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Last revised: April 29, 2000