Height clearance indicator

Claim 1

A CLEARANCE INDICATOR FOR TRAILER CAB HITCHED TO A TRAILER HAVING A ROOF SUBSTANTIALLY HIGHER THAN SAID CAB, COMPRISING, BRACKET MEANS MOUNTED ON SAID CAB, TUBULAR MEANS MOUNTED BY SAID BRACKET MEANS IN A VERTICALLY ADJUSTED POSITION, SCALE MEANS MOUNTED ON A LOWER END OF THE TUBULAR MEANS FOR VIEWING FROM THE CAB FOR ALL ADJUSTED POSITIONS OF THE TUBULAR MEANS, FEELER MEANS DISPLACEABLY MOUNTED ON AN UPPER END OF SAID TUBULAR MEANS PROJECTING UPWARDLY THEREFROM A PREDETERMINED DISTANCE ABOVE THE HEIGHT OF SAID TRAILER ROOF FOR DISPLACEMENT FROM A CLEAR INDICATING POSITION DOWNWARDLY TO A SLOW INDICATING POSITION SLIGHTLY ABOVE THE HEIGHT OF THE TRAILER ROOF AND FURTHER DOWNWARDLY TO A STOP POSITION AT A HEIGHT EQUAL TO THAT OF SAID TRAILER ROOF, POINTER MEANS MOVABLY MOUNTED BY SAID TUBULAR MEANS FOR COOPERATION WITH SAID SCALE MEANS TO INDICATE SAID POSITIONS OF SAID FEELER MEANS AND CONNECTING MEANS DISPOSED WITHIN SAID TUBULAR MEANS DRIVINGLY CONNECTING SAID FEELER MEANS TO THE POINTER MEANS FOR INSTANTANEOUS MOVEMENT THEREOF IN RESPONSE TO DISPLACEMENT OF THE FEELER MEANS.