| 摘要 |
<p>Disclosed is an indicating apparatus for attachment to a trailer or the like for use in aligning the couplings between the trailer and a towing vehicle, said apparatus being mounted on the trailer and having a spring loaded extendible and retractable guide line which releasably attaches to the rear of the towing vehicle adjacent the coupling. Sensing means are included in the apparatus for sensing deflection of the guide line in horizontal and vertical directions and for sensing the separation of the vehicles and indicator means in the vehicle to indicate said deflections and separation to the operator of the towing vehicle. Variable sensitivity means for increasing the sensitivity of the apparatus as the towing vehicle approaches the trailer and means for allowing the towing vehicle to approach the trailer from various angles are also provided.</p> |
