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Topic: Railway signal

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	Class Definition for Class 246 - RAILWAY SWITCHES AND SIGNALS
		Day or night signals or combinations of same used for the purpose mentioned and usually adapted to be supported by or attached to the roof or outer wall of a station or signal cabin and provided with means for operating them from within the same.
		The combined functions of the home and distant signals are sometimes performed by a three-position signal, indicating by its three positions, respectively, the presence of a train in the block ahead, the second block ahead, or that both blocks are clear.
		Systems in which the signal clearing operations require the cooperation of the operators at each end of the block and also the absence of trains from the block, which when present, by electrical means, render it impossible to clear the signals.
	www.uspto.gov /go/classification/uspc246/defs246.htm (3824 words)

	Signal Boxes built by the Railway Signal Company
		Wrexham, Mold and Connah's Quay Railway, one of a number erected in 1885 on the Wrexham to Buckley section.
		North British Railway was constructed, the Railway Signal Company built boxes with large overhanging hipped roofs.
		Although the Railway Signal Company continued to trade through to 1974, no signal boxes were erected to their own designs after 1923.
	www.signalbox.org /gallery/rsc.htm (258 words)

	Railway Signal Lamps (Site not responding. Last check: )
		Railway Signal Lamps could be the most important Industrial lamps and bulbs that we offer lamps in, for obvious reasons.
		If the Railway Signal Lamps were working the way that they should, maybe that person's life could have been saved.
		Railway Signal Lamps are produced with care for this purpose.
	www.bulbspecialists.com /railway-signal.asp (221 words)

	Early Railway Signals
		Railway signals are a means of communication beyond the range of the voice.
		Later, the signal was clearly distinguished by notching the end of the blade and painting the blade green with a red chevron.
		This signal was erected by the Central Vermont at Willimantic, CT to govern a junction with the New Haven.
	www.du.edu /~etuttle/rail/sigs.htm (12269 words)

	Model Railway Signal Project
		The first reed switch changes the signal to red as the train passes, then further along the track a second reed switch changes the signal back to green ready for the next train.
		The isolated section of track just in front of the signal is switched off by the relay when the signal is red so a train will stop automatically at the red signal.
		Note that railway signals have red at the bottom, unlike road traffic lights where red is at the top.
	www.kpsec.freeuk.com /projects/signal.htm (238 words)

	[IRFCA] Indian Railways FAQ: Signalling Systems
		Semaphore signals are set up so that when viewed from the part of the track for which the signal is intended, the semaphore arm extends to the left of the mast on which it mounted.
		Colour-light signals that are not in use (just set up but not yet commissioned, or in the process of being decommissioned) are often turned to point away from the tracks, so that it is clear to all locomotive drivers that the signal is not in service.
		A signal or station that he is approaching is referred to as being in front, and one that he has passed is said to be in the rear.
	www.irfca.org /faq/faq-signal.html (3358 words)

	Railway signal - Definition, explanation
		A signal is a mechanical or electrical device that indicates to train drivers information about the state of the line ahead, and therefore whether they must stop or may start, or instructions on what speed they may drive their train.
		This type of signal does use a (parabolic) reflector and thus lower power lamps and a less directional lens system are used since there is a far greater percentage of the light available to be directed down the tracks towards the driver of the oncoming train.
		While some signals used a lowered arm (lower-quadrant signal) to indicate that the signal could be passed, these were generally converted to the safer raised arm (upper-quadrant signal), which enabled the signal to fail safe in the case of a mechanical problem.
	www.calsky.com /lexikon/en/txt/r/ra/railway_signal.php (2288 words)

	Railway signal at AllExperts
		A signal is a mechanical or electrical device that indicates to train drivers or engineers information about the state of the line ahead, and therefore whether he or she must stop or may start, or instructions on what speed the train may go.
		Signals differ both in the manner in which they display aspects and in the manner in which they are mounted with respect to the track.
		In the United States, signal indications at interlockings multiplied to indicate the speed at which the train was to traverse the interlocked trackage.
	en.allexperts.com /e/r/ra/railway_signal.htm (2552 words)

	Railway cab signal transmitter - Patent 5263669
		A transmitter for transmitting cab signal and track signal currents to a pair of rails includes the circuitry for mitigating runby currents which are not fully shunted by the rail vehicle.
		The railway cab signal transmitter of claim 5 wherein said adjustment means is a resistance in series with said sensing coil and said relay further includes a second set of contacts to effectively decrease the resistance in series with said sensing coil when said detection means senses said approach of said railway vehicle.
		Cab signaling is well-known and has been used for many years with a transmitter applying a signal to the rails, and a railway vehicle mounted receiver inductively sensing the coded cab signal current being fed to the track rails.
	www.freepatentsonline.com /5263669.html (3321 words)

	What Is RSSI? \| RSSI.org
		Railway Systems Suppliers, Inc. is a trade association serving the communication and signal segment of the rail transportation industry.
		Our primary effort each year is to organize and manage a trade show for our members to exhibit their products and services.
		The association was incorporated in 1966 as the Railway Signal and Communication Suppliers Association Inc. Previous to that time it existed as two separate entities, one for the signal area and one dealing in the communications area of the railroad industry.
	www.rssi.org (176 words)

	Build Your Own Model Railway Signal
		This is the best time to paint the face of the signal including the shades fl as you wont be able to after the lights are in place.
		There you have it, a signal ready to be fitted to your board.
		Simply drill a small hole in you baseboard for the wires to fit through and to support the signal, and position the switch and connect the wires and power and your done.
	www.newrailwaymodellers.co.uk /Signal.htm (559 words)

	[IRFCA] Indian Railways FAQ: Signal Aspects and Indications - Principal Running Signals
		If the distance between the signal at Caution and the signal at danger is less than the safe braking distance, the signal to the rear displaying Attention also serves to alert the driver that the train may have to be slowed to restricted speed when it reaches the next signal.
		The Attention indication may correspondingly be displayed by the signal to the rear of the signal guarding the approach to a curve or a divergence or section with speed restrictions.
		A home signal at Caution indicates that the train may have to stop on the line before leaving the block, or that the train has to slow down to a particular speed in order for the starter signal at the entrance to the next block to shift to Proceed.
	www.irfca.org /faq/faq-signal2.html (3510 words)

	British Railway Signal Boxes and ground Frames
		Signal boxes were usually two-story buildings, the upper floor having large windows and containing the levers, instruments and what have you, the ground floor containing the complex mechanical interlocking mechanisms that prevented accidental setting of points and signals in dangerous configurations.
		The practice of having the road normally open and the railway line blocked by the gates started in the latter part of the 19th century, when the electric telegraph was introduced enabling gate keepers to be advised of an approaching train.
		Similarly where a siding from the railway crossed a road in to a factory the normal practice was to have a gate across the railway access and another across the entrance to the factory but the track between was often unprotected.
	myweb.tiscali.co.uk /gansg/3-sigs/sigbox.htm (4390 words)

	Railway Signal & Traffic Control Systems Standards (Site not responding. Last check: )
		Railway Signal & Traffic Control Systems Standards is available in PDF format (file size 152kb) which will download in approximately 43 seconds on a 28.8 connection and may be viewed using Acrobat Reader (version 3.0 or higher).
		2.4 "fail safe" a term used to designate a railway signaling design principle, the objective of which is to eliminate the hazardous effects of a failure of a component or system.
		3.7 Each signal shall be located with respect to the next signal or signals in advance which govern train movements in the same direction so that a restrictive aspect can be complied with by means of a brake application, other than an emergency application, initiated at such signal.
	www.tc.gc.ca /railway/Rules/TC_E-07-01.htm (1011 words)

	S&DJR Signal Types
		The familiar semaphore signal probably first arrived on the SandDJR to any great extent with the opening of the Bath Extension in 1874 and the rest of these notes deal with the subsequent period.
		Signals arms originally were made from wood in a LQ pattern similar to that used by the LandSWR, but in SR days onwards metal UQ replacements appeared, usually with the distinctive horizontal corrugations which were provided to give greater strength to the sheet metal arm.
		On distant signals the red aspect was superseded by yellow at the same that the arms were repainted yellow.
	www.trainweb.org /railwest/railco/sdjr/signals.html (1267 words)

	British Railway Signals - Mechanical and Fog signals
		Railway signalling is part science and part art form, it has always relied heavily on dedicated staff and in the early years on the memory of train crews.
		Signalling is not however a simple matter of stop or go and variations were introduced on the disc and bar and other systems to indicate such things as which route was being signalled.
		The single banner signal is sketched from a photograph in a book on GWR signalling by Adrian Vaughn (for details of which see the bibliography) and the double banner is drawn from a signal still in use on the line from Altrincham to the junction with the main line at Stockport in Cheshire.
	myweb.tiscali.co.uk /gansg/3-sigs/sigs-1.htm (7252 words)

	Signal Hill Railway
		The Signal Hill Railway, a private project of well known modeller John Rappard, was opened on Easter Saturday afternoon by K.A.McIntyre who brought his 71/4" gauge "Southern Belle" to be the first loco to officially run on the circuit.
		The railway is in the form of a line with a return loop at each end.
		It should be remembered that all railway enthusiasts are very welcome but visits are by appointment on request to John as it is a private track despite the seventy plus people at the opening.
	www.geocities.com /train_nut_nz/shr.html (1200 words)

	End Of The Line Railway Accommodation
		Experience a hideaway with a difference - a historic railway signal box and restored 1913 railway carriage that has been transformed into luxury accommodation right in the heart of Victoria's Spa Country.
		The Signal Box, with panoramic views across the lake, is the perfect place to wake up, enjoy a complimentary breakfast and soak in the bush surroundings.
		This piece of victorian railway history is the ideal place to sit back and be pampered in a unique and luxurious environment.
	users.netconnect.com.au /~railway (153 words)

	East Somerset Railway - Signal Box restoration (Site not responding. Last check: )
		After the loss of passenger traffic and with the general reduction in freight traffic, the signal box was closed in 1968 and the equipment removed.
		In 2000, the decision was made to start the long project to put the signalling back in at Cranmore and to return the Signal Box to its original function.
		Work was then undertaken to repair the physical structure of the signal box and start collecting the equipment necessary to restore it to a fully working box.
	www.eastsomersetrailway.com /projects/signalbox.php (224 words)

	Railway Technology - Railroad Signal International - Railroad Crossing Warning Signal Systems and Equipment
		Railroad Signal's maintenance and repair services for damaged or defective components are unsurpassed in the industry. Our technicians are fully qualified to test, maintain or repair any and all signal components.
		Railroad Signal International's experienced staff provides both hands-on experience and a broad spectrum of technical skills required to design, manufacture and install reliable signal systems.
		Railroad Signal's trained specialists are constantly improving their skills and keeping current with all new and changing technology.
	www.railway-technology.com /contractors/signal/railroad_signal (558 words)

	Railway - The IET
		The Railway Network works closely with its equivalent bodies of the Institution's sister engineering organisations of the Institutions of Civil Engineers, Mechanical Engineers, Railway Signal Engineers, Railway Operators, the Railway Civil Engineers Association and the Permanent Way Institution under the auspices of the Railway Engineers Forum (REF).
		Ensuring that the Railway employs competent people is a challenge and there are a range of approaches in use for the different disciplines, both engineering and non-engineering.
		The Engineering Institutions, as represented by the Railway Engineers Forum, are well placed to independently review the current situation and are willing to take a role in designing suitable competence regimes, and in the setting of professional standards for railway engineers.
	www.iee.org /OnComms/pn/railway/railengforum.cfm (1241 words)

	ESA - Navigation - The present - EGNOS - ECORAIL - successful demonstration of EGNOS for railway control applications
		The EGNOS COntrolled RAILway equipment (ECORAIL) project aims to provide an on-board unit that is able to determine the position of a train on the track with sufficient accuracy and reliability to be used for railway control purposes.
		The distances of the sensor and signal from the crossing are determined by the highest speed at which trains are permitted to travel on the section of line in question.
		The distance from the sensor to the signal must be great enough for the ALX to fully operate before the train reaches the signal.
	www.esa.int /esaNA/SEM53W5DIAE_egnos_0.html (754 words)

	THE ASSINIBOINE VALLEY RAILWAY
		He then continued to test the lower railway and had to disassemble two locomotives for lubrication and changed a worm gear in one.
		Dwight repaired the base on signal 34 and moved the switch stand on the East Charleswood switch to the north side were it will be out of the walk way.
		Dwight checked the signal system and did what maintenance needed to be done and removed soil from under the bridge on the line to the engine house.
	www.swedenfreezer.com /avr (2974 words)

	model railway signal (Site not responding. Last check: )
		A dummy signal is a signal which appears on the operating screen, but does not physically...
		The main purpose of any railway signalling system is to allow safe...
		Unlike traffic lights, the red lens of a railway signal is at the bottom...
	www.1-in-modeltrains.com /12/model-railway-signal.html (546 words)

	Bluebell Railway - Signal and Telecommunications
		The Bluebell Railway's Signal and Telecommunications (SandT) Department has developed and maintains the signalling system which controls our trains.
		The Signals - A full review of the various types of signals in use on the Bluebell.
		The Horsted Keynes Signalling Fund's Football Competition has, in the last few years, raised significant funds for the overhaul of the signal box at Horsted Keynes.
	www.bluebell-railway.co.uk /bluebell/signals.html (266 words)

	Railroad Signals, Railroad Safety Equipment & Services - RailServe.com
		Railway History, Signaling & Engineering - Information about historical and mechanical signalling, signal aspects, operations and safety, and unique practices in France, Belgium, Germany, Austria, Britain, and the US
		Signaling Pages - Explains signal systems in use around the world ranging from old semaphore signals still used in the UK and elsewhere to modern electronic high capacity systems used by metros
		Solar Signals - Designs and manufactures autonomous power systems (primarily solar electric/battery) that are integrated with signal systems currently in use in the rail industry
	www.railserve.com /Equipment/Signals (1849 words)

	New Railway Modellers - Model railway advice for beginners
		The Model Railway Tunnel page has had the addition of an N gauge tunnel article added and the electronics section has an article on Model Railway Infra-Red Control.
		I have been asked a few times how to motorise a Hornby model railway signal, so I came up with this solution to use a new point motor.
		Richard Lloyd has produced a resource article with pictures of different kinds of railway bridges, with some advice on how to model them, and I am documenting the creation of my model railway tunnel as it gets built.
	www.newrailwaymodellers.co.uk (976 words)

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