What kinds of signals (semaphores, lamps, etc.) does IR use?

Latest News

General Manager’s Safety Award for 10 Staff of Central Railway

View All >>

1 Rail News

क्षेत्रीय हिंदी प्रतियोगिता 2023 संपन्न

Central Railway Revolutionizes LHB Power Car Testing with Static Water Load Testing Units in a First of its kind Innovation
Shri Ram Karan Yadav takes over as General Manager, Central Railway
भारतीय रेल ने नवंबर 2023 तक 1015.6 एमटी माल लदान का लक्ष्य हासिल किया
जबलपुर-हजरत निजामुद्दीन एक्सप्रेस सहित 10 ट्रेन निरस्त, कामायनी एक्सप्रेस परिवर्तित मार्ग से चलेगी
रेलवे की बड़ी सौगात! अब इन स्‍टेशनों से पटना के लिए मिलेगी सीधी ट्रेन, जानें शेड्यूल
किसानों के बाद अब पूर्व सैनिकों ने घेरा रेलवे ट्रैक, One Rank One Pension की मांग को लेकर शुरू किया प्रदर्शन
रेलवे स्टेशन के फुट ओवरब्रिज पर ले सकेंगे स्ट्रीट फूड का आनंद

view all>>

2 Railway Employee

General Manager’s Safety Award for 10 Staff of Central Railway

view all>>

3 Always Important

जानिए पटरियों के साइड में क्यों लिखे होते हैं नंबर?

view all>>

What kinds of signals (semaphores, lamps, etc.) does IR use?

July 14, 2019, 3:16 PM

IR uses several kinds of signals. Semaphore signals have generally given way to colour-light signals although there are still many places with semaphore signalling in use. [1/02]

Semaphore signals are the older style signals seen widely throughout the country, where each signal has an assembly with an arm mounted on a mast, where the arm can move through two or three different positions at different angles, each position providing a distinct signalling aspect. Very early in India’s railway history, two-position lower-quadrant semaphore signals were the most prevalent. Around the 1930s, however, the introduction of American style power signalling equipment in some areas resulted in three-position upper-quadrant signalling being introduced as well, although both systems continued in use for many decades afterwards. It is not clear when distant signals were introduced.

Colour-light signals are assemblies of lamps that indicate different aspects by means of different colours of lamps that are lit. Colour-light signals were introduced in 1928 but were slow to take off. In recent years many older semaphore signals have been replaced by colour-light signals.

Position-lightsignals are assemblies of lamps where the signal aspect is indicated not by colour but rather by the combination of the lamps that are lit.

Disc signals are in the form of a vertical disc with a pattern such as a bar painted on it, which rotates about its centre to different positions to indicate different signal aspects. These are usually mounted on poles but may be close to ground level.

Target signals have a vertical disc (or two parallel vertical discs) which can rotate about a vertical axis so as to present the disc either face-on or edge-on to an observer along the track. Usually a lamp is provided behind the disc (or between the parallel discs) which is visible only when the discs are oriented edge-on. The centres of the discs usually also have lamps. The two aspects of this type of signal are indicated by the two orientations of the discs. This type of signal is almost always at ground level.

In the following, ‘on’ refers to that position of a signal which shows its most restrictive indication (in accordance with IR’s terminology). However, we use ‘clear’ for the position that shows the least restrictive indication instead of the word ‘off’ because the latter is used by IR to refer to any signal position other than the on position.

Source – IFRCA.org

Railway Employee (App)

Rail News Center ( App)

Railway Question Bank ( App)

Railway Mutual Transfer

(App)

Information Center ( App)

Disclaimer: The Information /News /Video provided in this Platform has been collected from different sources. We Believe that “Knowledge Is Power” and our aim is to create general awareness among people and make them powerful through easily accessible Information. NOTE: We do not take any responsibility of authenticity of Information/News/Videos.

This entry was posted in 2 Railway Employee, STUDY NEW, Railway Employee