Report on model making

Topics: Level crossing, At-grade intersection, Light rail Pages: 3 (585 words) Published: November 3, 2013
NDEJJE UNIVERSITY
FACULTY OF ENGINEERING
YEAR: ONE
ASSIGNGMENT
REPORT ON MODEL MAKING
THE ROAD AND RAIL CROSSING

INTRODUCTION

A level crossing is an intersection where a railway line crosses a road or path at the same level. The term also applies when a light rail line with separate right-of-way or reserved track crosses a road in the same fashion. Other names include railway crossing, grade crossing, road through railroad, and train crossing. Railway level crossings are the location where a road and railway line intersect at grade (at the same level) allowing road users (including pedestrians and cyclists) to travel over the railway tracks.

The barrier provides has to provide a mechanism by which it lowers when a train approaches from either direction or raising it again when the train has passed. Early level crossings had a flagman in a nearby booth that would, on the approach of a train, wave a red flag or lantern to stop all traffic and clear the tracks. Manual or electrical closable gates that barricaded the roadway were later introduced. The gates were intended to be a complete barrier against intrusion of any road traffic onto the railway. The first U.S. patent for such crossing gates was awarded on 27 August 1867, to J. Nason and J. F. Wilson, both of Boston.[1] Today radar sensor systems for automatic level crossing free detection are a cheap way to improve safety.

OBJECTIVE
The objective of this project is to construct a model version of an effective rail and road crossing made of a simple lifting barrier. APPARATUS
-Power supply
-Remote control and a remote receiver
-DC motor ( Meccano motor)
-Gear levers
-Barrier (wooden)
-Step down transformer
-Cells for the remote
-Superglue
-Plug and Connecting wires
-Metallic case
PROCEDURE
-Fix the receiver into the metallic case
-Connect the remote receiver to the motor and step down transformer -Assemble the gears in such a way that they have a linkage with the...
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