B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L29/00—Safety means for rail/road crossing traffic
B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
B61L29/286—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated using conductor circuits controlled by the vehicle
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Engineering & Computer Science
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Mechanical Engineering
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Toys
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Train Traffic Observation, Control, And Security
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The Invention of the Track Circuit: The History of Dr. William Robinson's Invention of the Track Circuit, the Fundamental Unit which Made Possible Our Present Automatic Block Signaling and Interlocking Systems
A Treatise on Perfect Railway Signaling: Describing the Development of the Electric Telegraph and Block Signaling Systems, Their Damage and Derangement During Thunderstorms, and Explaining the Requirements for Reliable Signaling