Type OB 450
Wall Pattern Switchboards
Metallic Circuit
Local Battery System
 OB 450/12 shown
pictured to the right.
THE CONNECTIONS ARE MADE BY MEANS OF PLUGS AND CORDS.
FRAMEWORK
Polished walnut. The jack and indicator field is covered with fibre.
EQUIPMENT
1 x JACK for each line.
1 x PAIR OF CORDs and 2-point plugs (see table for number of cord circuits on each board).
1 x SPEAKING AND RINGING KEY for each cord circuit.
1 x RINGING BACK KEY.
1 x CALLING INDICATOR for each line.
1 x 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
|
