I am looking for a picture, sketch, engineering drawing or something to prove or dissprove a design I am thinking about. I want to put a dump mechanism on a "vintage" trailer that I am buliding. (30 Pontiac springs and axle). I seem to remember that many many years ago some of the dump boxes were raised by a wedge that was forced rearwards between the tilting and the stationary parts of the dump. I have seen a hoist mechanism used on the front end of small dumps like I want to build but can find no information about the wedge style. Or am I just dreaming and never really saw such a mechanism?????
Thanks for your help.


Series 6-30B Pontiac
Assembled in Regina Saskatchewan
June 6, 1930.
Happy Hobbying