Trailer angular direction sensor and indicator

A trailer angular direction indicator comprising the combination of:

• a releasable hitching device interconnecting the rear of a towing vehicle with the draw bar of a trailer;
• a sensing means operably connected on said hitching device for detecting angular displacement of said trailer with respect to said towing vehicle;
• an indicator means operably connected to said sensing means including display means for presenting a visual indication of said angular displacement and the direction of said angular displacement with reference to increasing and decreasing of said angular displacement;
• wherein said sensing means includes:
• a sensing arm rotatably carried on said towing vehicle;
• a portion fixedly carried on the draw bar of said trailer insertably receiving said sensing arm in a slot of said portion so that said sensing arm follows the said angular displacement of said trailer with respect to said towing vehicle;
• said sensing means further includes a wiper contact arm carried on said sensing arm and a plurality of wiper contacts fixed with respect to said wiper contact arm whereby the width of the contact carried on said wiper arm is at least equal to the width of one fixed contact plus approximately two and one half times the width of space separating adjacent ones of said fixed contacts;
• said indicator means includes a plurality of lights whereby a centermost light represents coextensive centerlines of said trailer and said towing vehicle;
• said hitching device includes a ball carried on said towing vehicle and said sensing arm is rotatably carried thereon;
• and
• said ball includes a horizontal slot for accommodating rotation of said sensing arm.