Type OB 3500Floor Pattern Switchboards
With Combined Jack and Indicator (Mechanically restored)
Metallic Circuit
Local Battery System
Type OB 3500
Floor Pattern Switchboards
With Combined Jack and Indicator (Mechanically restored)
Metallic Circuit
Local Battery System
OB 3500/25 shown
FRAMEWORK
Woodwork, polished walnut, with the jack field covered with fibre. Legs enamelled cast iron.
EQUIPMENT
1 COMBINED JACK AND INDICATOR for each line.
1 PAIR OF CORDS with 2-point plugs (see table for number of cord circuits on each board).
1 SPEAKING AND RINGING KEY for each cord circuit.
1 DOUBLE SPEAKING KEY.
1 DOUBLE RINGING KEY for Hand Generator.
1 DOUBLE BATTERY RINGING KEY.
1 POWER GENERATOR RINGING KEY.
1 TEST JACK.
1 TESTING KEY.
1 CLEARING INDICATOR for each cord circuit.
NIGHT BELL.
NIGHT BELL SWITCH.
GENERATOR. RH 5000, 5-magnet.
MICROTELEPHONE. RE5052, with cord RS7021.
This type of switchboard is not usually kept in stock.
NOTE
The calling indicators are mechanically restored by the action of the plug.
|
TYPE |
No. of metallic ccts |
No. of cord ccts |
Height ins |
Width ins |
Depth ins |
Weight in lbs. |
|
OB 3500/25 |
25 |
5 |
57.30 |
16.92 |
31.8 |
88.20 |
|
OB 3500/50 |
50 |
10 |
58.07 |
22.05 |
31.8 |
132.30 |
|
OB 3500/105 |
105 |
15 |
61.81 |
26.18 |
31.89 |
198.45 |
(This type is only supplied for the extension of Old Exchanges. It is now superseded by type
OB 6020.)
Taken from the Ericsson Telephone Catalogue 1914
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