Communications: electrical – Land vehicle alarms or indicators – For trailer
Patent
1997-05-20
1998-10-13
Hofsass, Jeffery A.
Communications: electrical
Land vehicle alarms or indicators
For trailer
280477, G08B 2100
Patent
active
058218521
ABSTRACT:
Apparatus for indicating axial alignment or deviation from alignment, and proximity between a tow vehicle and a trailer towards which the tow vehicle must be maneuvered. The apparatus comprises a storage reel mounted on the tow vehicle for storing and paying out a cord, a pulley having a magnet for mounting the pulley temporarily on the trailer hitch, and a take up reel mounted on the tow vehicle for applying tension to the cord. As the tow vehicle is maneuvered, changes in relative position between tow vehicle and trailer cause the cord to change length and angular orientation relative to the tow vehicle. These changes are sensed as one or both of the storage reel and take up reel rotate responsive to cord changes. A plurality of switches make or break contact to a matrix of indicating lamps located in the cabin of the tow vehicle, the indicating lamps indicating position of the tow vehicle relative to the trailer. The reels are permanently or temporarily mounted on the tow vehicle. The pulley has a magnet for temporary, readily removable attachment to the trailer hitch.
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Hofsass Jeffery A.
Pham Toan N.
Siemens Terrance L.
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