A semiconductor is a solid that has electrical conductivity in between that of a conductor and that of an insulator, and can be controlled over a wide range, either permanently or dynamically.
Conductor's punch
Paired Track
When two railroads own single track lines, they may reach an agreement whereby one railroad's track services both roads in one direction, while the other railroad's track services both roads in the other direction.
Conductor and Engineer-The conductor and engineer are the third set of persons who are involved in this process.
Conductor Jerry Voss and I were ordered for 0600 hours at Hawthorne for the Hawthorne-Markham Transfer assignment, R954.
Conductor
Crew member responsible for the safe and proper operation of the train.
Connecting rod ...
Conductor
The senior crew member on a freight or passenger train responsible for the safe, prompt movement of the train; for the care of its cargo and equipment; and for the actions and safety of the crew.
Conductor
Person responsible for the safe and proper management of the train
Connecting Carrier ...
Conductor
Train service employee in charge of train or yard crew. Also called Yard Foreman.
Conflicting Routes ...
Conductor figures: those railroad figures in coffee-can hats can be used for other things. Paint the uniforms Sky Blue, and you have French soldiers circa 1915 - 1929. Paint them Navy blue with Red hats and add a small cap, and you have gendarmes.
Semi-Conductor - Material used in electric traction rectifiers, whose electrical resistance depends on the direction of the applied voltage. Silicon and Germanium are typical examples.
Seniority - Length of service relative to others.
APE All Purpose Employee -- an employee that is a promoted engineer that can also be forced to work as a conductor or trainman.
Conductor Brakeman, with or without brains, displaying pencils. Controlled Point A location designated by number where signals and /or switches of a CTC system are controlled by a control operator.
The outer rails are almost never a problem since they have a double conductor, but if you rule out everything else, you might check them too. A resistance less than 5 Ohms is pretty good, more and you should trace the problem.
ORC Old Reliable Conductors -- The union that represented conductors during the mid to late 19th century Originating Line Haul Road The railroad where any freight shipment starts.
Conductor US term for train staff member whose duties vary with different administrations but who is primarily responsible for train and passenger safety. Often also involved with ticket inspection.
Big Boy Union Pacific 4-8-8-4 600 ton steam freight locomotive Big C The conductor (from the Order of Railway Conductors) Big E A railroad engineer (for Brotherhood of Locomotive Engineers) Bighole Emergency application of air brakes, ...
An electric conductor located alongside the running rail from which power is collected by means of a sliding contact shoe attached to the truck of electric equipment.
Throat of frog.
caboose — a rolling office usually placed at the end of a train for the use of the conductor and train crew. Now rarely used. Most have been replaced by "FREDs"
Campbell kit — an older well known brand of wood structure kits.
Conductor (US), guard (UK): The person "in charge" of a train and its crew. On passenger trains, a conductor is also responsible for tasks such as assisting passengers and collecting tickets.
This extra rail is called the conductor rail. Electric Train Heating (ETH) A method of heating a train using electricity.
Nickel silver's oxide is a fair conductor (few ohms) while brass oxide is a poor conductor (lots of ohms), so we use nickel silver rails. There is a catch: nickel silver rail has more ohms per foot than brass rail.
LM555 Data sheet - National Semiconductor (.pdf)
CMOS LM555 Data sheet - National Semiconductor (.pdf)
LM556 Data sheet - National Semiconductor (.pdf)
LM555 Timer tutorial - By Tony van Roon
The Electronics Club - 555 and 556 Timer Circuits
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is the constant flow of electric charge from high to low potential. This is typically in a conductor such as a wire. In direct current, the current flow is in the same direction, distinguishing it from alternating current (AC).
A travelling employee who is in charge and oversees the safe working of a train. Where the guard has no assistants such as a conductor on a passenger train, the guard is also responsible for shunting operations and the comfort of passengers.
The cylindrical pieces of an insulating joint which surround portions of the bolts.
Third rail. An electric conductor located alongside the running rail from which power is collected by means of a sliding contact shoe attached to the truck of ...
Later British coaches retained the compartment idea but also had a long narrow corridor running the length of the vehicle, along which the conductor would walk. Modern British coaches are generally open coaches - open with rows of seats.
vehicle can carry, for those types of rolling stock vehicles which can carry more than one type of product. For example, a user might use the Commodity Picker to restrict the use of a generalised oil tanker to carrying aviation fuel.
Conductor ...
Tag Strip : A means of joining several wires to a common conductor, such as in a common return system. The wires must be soldered to the tag strip.
Terminal Block : A means of joining two wires with screw terminals, useful to avoid soldering.
 See also: Train, Engine, Track, Current, Switch
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