US PATENT SUBCLASS 246 / 111
GRADE-CROSSING TRACK PROTECTION


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



246 /   HD   RAILWAY SWITCHES AND SIGNALS

111GRADE-CROSSING TRACK PROTECTION {3}
112  DF  .~> Semi-automatic
113  DF  .~> Automatic {2}
117  DF  .~> Cab signal or train control


DEFINITION

Classification: 246/111

(under the class definition) Systems and devices which include any arrangement of train-controlling means--such as signals, derails, interlocking, automatic stops, etc., --designed to prevent collisions where two or more lines of railway cross at grade.

SEE OR SEARCH THIS CLASS, SUBCLASS:

118, for similar systems used at drawbridges.

125, 260, 293, and 473, and appropriate indented subclasses for signal structure.

465, and the subclasses indicated in the search notes appended thereto, for the structure of the crossing.