|
The switches here are generally described as a Switch, X-Terminal,
Y-Position where X is the number of terminals on the switch and Y is the
number of positions the switch can move.
At the bottom of this page is a
table explaining many of the operating conditions the switches can provide
for.
| Switch, 4–Terminal, 2–Position Night Bell switch.
Wooden base, 4.5" x 4.5".
|
|
| Switch, 4–Terminal, 3–Position
Used as a battery switch on Admiralty inter-port circuits.
Wooden base, 4" diameter.
|
|
| Switch, 4–Terminal, 4–Position Night Bell switch
for small exchanges, with OFF, DAY, NIGHT 1 and NIGHT 2
positions.
Mahogany base, 3.5" diameter.
Drawings -
TL2591, TL2592
and 8810.
|
|
Switch, 5–Terminal, 3–Position
Block and telephone working
|
|
| Switch, 5–Terminal, 4–Position Used on test
stations on the Paris telephone line.
Wooden base, 5.5" diameter.
|
|
| Switch, 5–Terminal, 5–Position Night Bell switch
for small exchanges, with OFF, DAY, NIGHT 1, NIGHT 2 and NIGHT 3
positions.
Mahogany base, 3.5" diameter.
Includes:-
1 Switch, Rotary, CD 519.
To be requisitioned separately:-
1 Knob, Instrument No. 3B.
1 Pointer, Instrument No. 5J.
Drawings -
TL2591, TL2592
and 9188.
|
|
| Switch, 6–Terminal, 2–Position 2-way,
2C action.
Telegraph use, labeled "Duplex" and "Simplex".
Wooden base, 4" diameter.
Introduced circa 1902.
Drawing - 928.
Superseded by a Bakelite type with the same name in 1934.
|
|
| Switch, 6–Terminal, 2–Position, No. 1
General use.
Drawing - 8517.
|
|
| Switch, 6–Terminal, 2–Position 2-way,
2C action.
A slide action switch, used on the Extension Plan No. 3, made
of Bakelite X20/386.
Labelled "CUT OFF" and "NORMAL".
3" x 1.5" x 1".
Introduced circa 1934.
Drawing - 928.
|
 |
| Switch, 6–Terminal,
3–Position Used on the Fleet Street Switch, CTO.
|
|
| Switch, 7–Terminal, 2–Position Call
Office Telephone use.
Wooden base, 4" diameter.
|
|
| Switch, 7–Terminal, 4–Position, No. 1
General use.
|
 |
| Switch, 8–Terminal, 3–Position Bridge Intermediate
use.
Wooden base, 5.75" diameter.
|
|
| Switch, 8–Terminal, 4–Position
|
|
| Switch, 9–Terminal, 2–Position
Quaduplex and Bridge Duplex use.
Wooden base, 4" diameter.
Introduced circa 1901.
Drawing - 810.
|
|
| Switch, 10–Terminal, 2–Position Exchange
intermediate switch.
Wooden base, 5.75" diameter.
|
|
| Switch, 11–Terminal, 2–Position Exchange
intermediate switch. Engraved "EXCH" and "DOWN".
Wooden base, 5.75" diameter.
|
|
|