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Switch, Indicator and Key N601
A Bakelite cased cabinet comprising of one key, two indicators, a buzzer and a bell.
Used on Extension Plan No. 8A. Two telephones were associated with this plan,
one with each exchange line. The switch unit had a single telephone
for connecting to each of the lines. The single telephone is unable to
listen in to a call in progress thus affording secrecy. One line had
the buzzer as the calling device and the other line the bell.
Includes:-
1 x Bell No. 56A.
1 x Block, Terminal No. 20/14 Blk.
1 x Buzzer, No. 24A (modified).
2 x Capacitors, M.C. No. 102.
1 x Label No. 260 (engraved).
5 x Cordage, Instrument No. 12/F, Brown.
1 x Cover No. 5.
1 x Handle, Key No. 1, Black.
2 x Indicators No. 3300B.
1 x Key No. 212.
1 x Label No. 260 (engraved).
Introduced circa 1938.
Wiring diagram - N601.
Drawing - 63437.
Switch, Indicator and Key N1612 10/10
For Multiphone phone working over ten private wires. The unit
contains a Potentiometer No. 8A, Buzzer No. 18A, two connect circuits and
two ring keys.
This was specially designed for press work and is effectively a 10 line
CBS Private Wire Switchboard.
Superseded by the Switchboard, Multiphone
N1612.
Includes:-
1 x Buzzer No. 18A.
1 x Case, Switch and Indicator D 9735.
5 x Handles, Key No. 1, Black.
1 x Handles, Key No. 1, Yellow.
1 x Handles, Key No. 1, Green.
5 x Handles, Key No. 1, Red.
10 x Indicators No.
2800C.
1 x Keys No. 212.
1 x Keys No. 291.
10 x Keys No. 300.
1 x Key-mountings KY.
3 x Key-mountings N.
1 x Mounting No. 130/10A.
1 x Potentiometer No. 8B.
10 x Resistor, Coil No. 12 - 100R.
1 x Resistor, Coil No. 12 -
30R.
1 x Strip, Designation No. 8.
1 x Label No. 164.
Introduced circa 1935.
Wiring diagrams - N1612,
N1613, N1615 and for new work
N1627.
Drawing - 60598.
Switch, Indicator and Key N1617 10/10
For concentrating 10 Automatic or C.B. exchange lines or extensions or Private
Wires and 3 operator's circuits for distribution of press news. The
Buzzer is fitted externally. Case is the one used on the N1612 type.
Known as Multiphone working this apparatus is a 10 line Universal
Switchboard.
Includes:-
1 x Buzzer No. 18A.
10 x Capacitors, M.C. No. 101.
1 x Case, Switch and Indicator D 9735 (Mk. 3).
6 x Handles, Key No. 1, Black.
4 x Handles, Key No. 1, Green.
3 x Handles, Key No. 1, Red.
10 x Indicators No. 3300A.
3 x Keys No. 68.
10 x Keys No. 264.
1 x Key-mountings KE.
1 x Key-mountings KAF.
1 x Mounting No. 130/10A.
10 x Resistor, Coil No. 12 - 100R.
1 x Strip, Designation No. 8B.
To be requisitioned rep:-
1 x Case, Coil and Capacitor N1616 3+1/4
1 x Switch, Indicator and Key, N1619 (when reqd.)
Introduced circa 1936.
Superseded by U.A.A. SA9152 in conjunction with Key and Lamp-units
No. 2A.
Wiring diagram - N1617.
Drawing - 60958.
Switch, Indicator and Key N1619 3+1/4
Wooden cased key unit for concentrating 3 automatic or C.B. exchange lines and 1 extension.
Provides positive clearing when an exchange line is connected to the
extension. Used with Switch, Indicator and Key N1617 10/10.
Includes:-
1 x Capacitor, M.C. No. 102.
1 x Clip No. 20B.
1 x Indicator No. 3300A.
1 x Key No. 228.
2 x Keys No. 236, 1 x Green and 1 x Grey.
2 x Key-mountings N.
1 x Key-mountings PS.
4 x Labels No. 239, White.
1 x Relay No. 303A.
1 x Resistor, Coil No. 12 - 80R.
Introduced circa 1936.
Wiring diagram - N1619.
Drawing - 61274.
Switch, Indicator and Key N1636 1/1
Wooden cased key unit for use instead of bell-set to receive calls and connect line to
operators set. For terminating one Automatic or C.B. exchange line or
P.B.X. Extension where guard lamp is required. A buzzer is required and
fitted external to the unit.
Includes:-
1 x Capacitor, M.C. No. 101.
1 x Clip No. 20.
1 x Coil, Induction No.27.
1 x Coil, Retardation No. 3416.
1 x Indicator No. 3300A.
1 x Jack, Lamp No. 47.
1 x Lamp No. 2.
1 x Key No. 73, Black.
1 x Key-mountings N.
1 x Labels No. 164.
Wiring diagram - N1636.
Drawing - 90580.
Switch, Indicator and Key N1659 5/5
For terminating up to five exchange lines with two answering instruments.
Mahogany or Oak cased key unit for use on Installation Controls. Uses an
Indicator No. 3100A2 to indicate line in use. Two lines can be
switched through to two answering machines.
Introduced circa 1937.
Includes:-
5 x Capacitor, M.C. No. 152A.
1 x Clip No. 20.
5 x Rectifier Element No. 1/6A.
1 x Relay No. 127B.
5 x Indicator No. 3100A2.
1 x Strip, Designation No. 8A.
1 x Key No. 212, Red.
5 x Key No. 236, Black.
6 x Key-mountings Q.
2 x Labels No. 120.
1 x Labels No 164.
Wiring diagram - N1659.
Drawing - 63403.
Switch, Indicator and Key CB2023 1/1
Single line key unit for use instead of bell-set to receive calls
and connect line to operator's set. For terminating one automatic
exchange line or PBX extension rented by the Exchange Telegraph Co. or
similar organisations.
C.B. exch. line or P.B.X. extension.
Includes:-
2 x Capacitor, M.C. No. 101.
1 x Clip No. 20B.
1 x Coil, Induction No. 27.
1 x Coil, Retardation No. 3416.
1 x Indicator No. 3300A.
1 x Key No. 207, Black.
1 x Key-mounting N
Drawings - 60724 & 60725.
Wiring diagrams - CB2023 and N1621.
Switch, Indicator and Key CB2024 10/10
Wooden cased key unit with Buzzer for terminating ten exchange lines, PBX extensions or PW's.
Includes:-
10 x Capacitor M.C. No. 102.
10 x Indicator No. 2200A.
3 x Key No. 68, Black.
10 x Key No. 215 (3 x black, 3 x red and 4 x green).
1 x Key-mounting KE.
1 x Key-mounting KY.
1 x Label No. 164.
1 x Resistor Coil No. 12 - 1000ohms.
1 x Buzzer No. 18A.
Introduced circa 1937.
Wiring diagram - CB2024.
Drawing - 60731.
Switch, Indicator and Key CB2057 8+2/10
10 line wooden key unit.
Includes:-
8 x Capacitor, M.C. No. 101.
1 x Clip No. 24.
8 x Indicator No. 3300A.
2 x Indicator No. 3300B.
1 x Key No. 68, Blk.
1 x Key No. 174 black.
2 x Key No. 208 Yellow.
8 x Key No. 215.
1 x Key-mountings KE.
1 x Key-mountings KY.
1 x Buzzer No. 18A.
Wiring diagram - CB2057.
Drawing - 60631.
Introduced circa 1936.
Switch, Indicator and Key TL2207
Termination of one private wire by the Exchange Telegraph Company Ltd and
similar organisations. Has a potentiometer fitted to control side
tone. A Switch Foot No. 1 can also be connected to unit to mute the
line. A hand generator or ringing lead is also connected and this is
for signalling to the other end of the circuit.
Includes:-
1 Bracket, Mounting BY.
1 Capacitor, M.C. No. 100.
2 Capacitor, M.C. No. 102.
1 Clip No. 20E.
1 Coil, Induction No. 3/16.
1 Coil, Retardation No. 3416.
1 Indicator No. 2200A.
1 Key No. 174, Black.
1 Key-mounting N.
1 Potentiometer No. 8B.
1 Resistor, Coil No. 12 - 600R.
Introduced circa 1937.
Wiring diagram - N1620.
Drawing - 60724 & 60725.
Switch, Indicator and Key TL2208
Termination of ten private wires with supervisory indicators and Multiphone
working.
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