THE SIGNAL BOX

SIGNALS

BRITISH RAILWAY SIGNALS

LMS and BR(LM) Signals

Stop signal with Shunt Ahead arm

LMS stop signal with Shunt Ahead arm

This lattice-post signal was probably erected during LMS days - it certainly bears standard LMS arms.

However, the "shunt ahead" arm (which allows trains to draw forward onto the single line for shunting purposes without being issued with a tablet) bears an unusual feature. A letter "S" has been superimposed on the arm. The normal practice for this kind of signal was for an illuminated letter "S" to be revealed when the arm was cleared. It appears that at some time before World War II, most of the subsidiary arms on the former Highland Railway has a letter "S" fitted to "comply" with standard signalling practice.

This was the Up Starting signal at Georgemas Junction.


LMS balanced bracket signal

This standard LMS structure is what is termed a "balanced" bracket - meaning that the weight on the bracket is evenly distributed to reduce strain.

The main post is lattice, light but strong, but the individual dolls are tubular. A guy wire has been provided for extra support.

The signals here, at Middleton Junction West, read along the Up Main (right hand doll), to the Up Slow (centre doll) and at one time a miniature arm was mounted on the left doll reading to the Through Siding. The distant arms belong to Vitriol Works box.

More information about Middleton Junction West can be found in Bob Wright's two-part article.

Balanced bracket signal

Co-acting stop signals

LMS Co-acting stop signals

The need to provide a good approach view of these signals necessitated the provision of co-acting arms. Whilst for a divergence, a bracket signal would normally have been provided, the potential weight of such a structure has made it more sensible to erect separate posts in this instance.

The two posts are well guyed, and braced together. Lattice construction provides good strength and little wind resistance. Nevertheless a considerable movement would be felt by a lampman in windy weather.

The signals, at Napsbury, read along the Up Slow and Up Slow to Fast, and survived up until closure of the box in 1979.

More details about Napsbury will be found in the Photo Gallery pages.


LMS shunting disc

The LMS shunting disc was of modular construction, so that multiple configurations could be created as needed. This example, however, is of thew most common type - with just a single disc.

The face is of enamelled steel, and a small enamel plate is also provided below, with an arrow to make it clear to which line the signal applied.

This type of signal is still common at mechanical installations throughout the former LM Region. The example shown here was at Leek Brook Junction, more details of which will be found in the Photo Gallery.

LMS shunting disc

BR(LM) bracket signal

This is a standard BR(LM) structure, mounted on a tall main post.

This type embodies a tubular steel post, with a welded girder structure forming the platform. Originally, there was another doll on the left carrying a higher arm for the main route, by this date only in use as a siding.

The arm is similar to the LMS types illustrated above.

The weight bars have, unusually, been mounted high up the post necessitating an additional ladder - this is normally only done where the signal is mounted on a platform or where space between lines is very limited.

The signal was the Leek Brook Junction Down Branch Starting, and more information about that location can be found in the Photo Gallery pages.

BR(LM) bracket signal

Additional notes by Mike Romans