Earth scraper with self-loading endless conveyor

Claim 1

IN A SELF-LOADING SCRAPER HAVING A MOBILE BOWL INCLUDING AN OPEN MATERIAL RECEIVING END, MATERIAL EJECTOR MEANS ON SAID BOWL, A DRAFT FRAME CONNECTED TO SAID BOWL INCLUDING MEANS FOR RAISING AND LOWERING SAID BOWL FROM AND INTO MATERIAL DIGGING POSITION RELATIVE TO THE GROUND AND AN ENDLESS CONVEYOR PIVOTALLY SUPPORTED IN AN INCLINED POSITION WITHIN SAID BOWL WHEREBY THE LOWER END THEREOF MAY BE RAISED AND LOWERED RELATIVE TO SAID OPEN END; A RAISING AND LOWERING MECHANISM FOR SAID CONVEYOR COMPRISING A LEVER HAVING FIRST AND SECOND ARMS, MEANS PIVOTALLY CONNECTING SAID FIRST ARM TO SAID DRAFT FRAME FOR HINGING MOVEMENT ABOUT A HORIZONTAL AXIS, MEANS PIVOTALLY CONNECTING SAID SECOND ARM TO SAID FIRST ARM FOR HINGING MOVEMENT ABOUT A SECOND HORIZONTAL AXIS, A FLUID RAM ON SAID DRAFT FRAME CONNECTED TO SAID FIRST ARM, MEANS CONNECTING SAID SECOND ARM TO SAID ENDLESS CONVEYOR, MEANS ON SAID ARMS LIMITING THE HINGING MOVEMENT OF SAID SECOND ARM RELATIVE TO SAID FIRST ARM WHEREBY DURING THE LOWERED POSITION OF SAID CONVEYOR, SAID LOWER END MAY RAISE AND LOWER WITH SAID SECOND ARM IN RESPONSE TO THE MATERIAL CONVEYED TO SAID BOWL, AND SAID RAM BEING OPERABLE FOR RAISING AND LOWERING SAID CONVEYOR.