Bell signals

Block shelf at Bewdley South signal box showing bells.

Signalmen at adjacent signal boxes largely communicate with each other using bell signals. Compared to voice messages, bell signals have the advantage that they are quicker to send and have less risk of being misunderstood. In the early days of railways, they also had the advantage that the equipment they use is simpler than a telephone.

Description

The exact type of equipment used varies between signal boxes according to the signalling regulations in use. However, in general, each signal box will have a bell for each signal box that it sends trains to or receives them from, and some way to ring the equivalent bell in each far signal box. If a signal box uses token instruments, there will be a bell plunger built into each instrument. Other signalling regulations might use a 'tapper' built into a block instrument, or a separate tapper on its own.

In each case, pressing the tapper or plunger will ring a bell in the other signal box. 'Single-stroke' bells are used, so one press of the tapper causes a single 'ding' in the other signal box. The bells in each signal box will be made up of a variety of bells of different pitch and tone, so that the signalman can easily identify each bell by its sound.

It is often possible to hear at least some of a signal box's bells when standing on the platform. Remember, though, that you will nearly always only ever hear the bell signals being received. When a signalman sends a bell signal, his own bells do not ring.

Bell signals are made up of groups of beats separated by pauses. They are written down as the number of beats in each group, with dashes for each pause. For example, '3-1' means three beats, pause, one beat.

Example bell signals

The most common bell signal is probably the 'Call Attention' signal, used before nearly all other signals to alert the signalman that a bell signal is coming. It consists of just a single beat of the bell.

The largest group of signals consists of the "Is line clear..." signals, because there is a different signal for each class of train that a signalman might want to send. Some examples are:

  • 3-1 Is line clear for Class B ordinary passenger train?
  • 4 Is line clear for Class A express passenger train?
  • 2-3 Is line clear for Class G light engine(s)?

There are also variants on these signals that indicate particular types of stock, or that are for SVR-specific operational purposes:

  • 3-1-2 Is line clear for Class B ordinary passenger DMU?
  • 3-3-3 Is line clear for Class A/B passenger train not stopping at Bewdley?
  • 2-5-1 Is line clear for Class C footplate experience train?

Bell signals are also used by signalmen to inform each other about the passage of trains and for other reasons:

  • 2 Train Entering Section
  • 2-1 Train Out Of Section
  • 5-5-5 Opening signal box
  • 7-5-5 Closing signal box

Not all codes are used by all signal boxes. E.g. Only boxes that may be switched out would use 5-5-7.

See also

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Welcome to the Severn Valley Railway Wiki

From this week's featured article
Trimpley Reservoir can be seen to the west of the line between Bewdley and Arley. The reservoir, which is managed by Severn Trent Water, was opened in 1968 and covers 29 acres. It is open to the public and is used by the Trimpley Sailing Club, while other activities include angling, wildlife watching and walking. (Full article...)
Schematic Map of the SVRSevern Valley Railway
BridgnorthEardingtonHampton LoadeCountry Park HaltHighleyThe Engine HouseArleyVictoria BridgeNorthwood HaltWyre Forest LineBewdleyStourport BranchBewdley TunnelConnection to Network RailKidderminsterMaps#Schematic maps of the pre-closure SVRMapandlinks.png
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For 101 years between 1862 and 1963, the Severn Valley Railway formed part of the national railway network, running for 40 miles between Hartlebury and Shrewsbury. Established as a separate company, it was mainly operated by the Great Western Railway (GWRGreat Western Railway) and later by British Railways (BRBritish Rail or British Railways).

The present day Severn Valley Railway (SVRSevern Valley Railway) was established in 1965 to preserve part of the line as a heritage railway. Today it has six stations and two halts and runs for 16 miles along the Severn Valley between Bridgnorth in Shropshire and Kidderminster in Worcestershire, following the course of the River Severn for much of its route. Operations involve a mixture of steam and heritage diesel-hauled services.

This unofficial website is a project aimed to collect information and record events relating to the SVRSevern Valley Railway, both past and present.

For timetables, fare information, and news about special events, please visit the SVR Official Website. Other news and information of interest to members, shareholders and enthusiasts can be found on SVRLive.

In April 2023 the SVRSevern Valley Railway announced the launch of a Survival Fund to enable it to overcome the current financial crisis and implement longer-term plans for its future. Information and details of how to donate may be found on the SVRSevern Valley Railway's Survival Fund page.

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