Merrill James Anderson
Land Surveyors in Omaha, NE
License number
Colorado 10845
Issued Date
Feb 19, 1972
Renew Date
Sep 1, 2000
Expiration Date
Sep 1, 2000
Type
Professional Land Surveyor
Address
Address
6421 So 107, Omaha, NE 68127
Professional information
Automated Railroad Crossing Warning System
US Patent:
6157322, Dec 5, 2000
Filed:
Nov 9, 1993
Appl. No.:
8/150360
Inventors:
Merrill J. Anderson - Omaha NE
International Classification:
G08G 116
US Classification:
340903
Abstract:
An automated railroad crossing warning system includes a housing mounted at the intersection of a railroad track and a roadway with directional horns oriented in opposite directions to direct horn blasts along the roadway. A light is mounted on the housing for viewing by a railroad engineer. A control unit detects the presence of a train approaching the intersection and transmits a signal to the horns to activate the horns. A horn detector transmits a signal to the control unit upon activation of the horns at a predetermined decibel level. The control unit then activates the light such that the railroad engineer can visually determine that the horns at the intersection are being activated. The control unit includes an electronic circuit which causes the horns to produce blasts in a predetermined sequence which matches the conventional signal produced by a train engine upon approaching such a crossing.