CF du Nord - Paris Area Interlockings ca 1890 -
The Saxby Interlocking Cabin No 1 is equipped with a frame for 200 levers.
194 levers are in use:
92 signal levers
45 points levers
39 direction levers
10 disengager levers (for slotted signals)
5 locking bar levers (pédales)
3 derailer levers
The box is worked by 15 men, among them four principal signalmen. Four
men are always on duty:
The signalmen work six hour shifts, except the assistant, which is relieved
every eight hours.
- One principal signalman working the centre of the frame
- One signalman works the south area (departures side)
- One signalman works the north area (arrivals side)
- One signalman assists in the north area
Trains, engines and shunting moves departing or arriving to be announced
by telephone or by appareils électriques à guichets [train describer], which connect cabines 1, 1bis,
2 and postes A, C, D and E. The signalman receiving a train
description (by telephone or by indicator) to announce in a loud voice the
track and the signal to be taken off. Principal signalman reverses levers
for points and facing point locks, if neccessary assisted by signalman to
the right or left. The signalman reverses the levers for taking off the signal.
For track No:s I and V an authorisation from poste D is required before
any signal is taken off.
Signalmen in cabin 1 to inform collegue in poste D by telephone
or by appareils a correspondence électrique [probably some telegraph instruments
or train describers] about all trains, engines
or shunting moves. The track number to be indicated.
Before starting a movement towards the local/belt lines departure (Départ
Tramways et Ceinture) or the wall track (Voie du mur) an authorisation
from cabins 1bis and 2 is required. Cabin 1 has to give authorisations
to cabins 1bis and 2 for movements in the other direction.
When a train, engine or shunting move is stopped at one of the signals
at Jessaint footbridge, signalmen in cabin 1 must immediately and without
hesitation protect the train or engine by reversing the disengaging lever
(levier de désengageur) for the track in question.
Clearing of starting signals for track numbers I - XIX is requested:
Sidings E, F and G are equipped with stop blocks (blocs d'arrét)
interlocked and worked by cabin 1.
- For train departures: By the station controllers operating
plungers at far end of platforms
- For engines standing near buffer stops: By signalmen in poste
A, by pressing plunger twice
- For engines stationary near signals: By signalman in poste
Working of Safety locks for Poste C (Manoeuvre des Safety locks
du Poste C)
When tracks No I - XIX are occupied by trains, engines or shunting moves,
they are protected by Safety-lock levers (leviers de Safety-lock)
in Poste C. When reversed, these levers prevent cabin 1 from clearing the
signal for entry to the occupied track [slotting?]. If it is
neccesary for cabin 1 to send an engine or a shunting move to an occupied
track, it has to request by appareils de correspondence à guichet
that poste C temporarily releases the safety-lock. If the request is
granted, poste C makes the indicator disappear to signal to cabin 1
that the move may be carried out.
Electric bells outside poste C indicate that reversing the Safety
lock lever has been effective.
Electric repeaters (contrôleurs électriques) inside
poste C indicates to the signalman the position of cabin 1 signals
which are disengaged (désengagé) by levers in poste
C [slotting to enable poste C to
put som of cabin 1's signals to stop]
Electric repeaters inside cabin 1 indicates to signalmen the manipulation
of disengagement levers in poste C.
CF du Nord interlockings
Last update 2009-01-04