Depth indicating and depth controlling device for earth moving machines

Claim 1

IN COMBINATION (A) AN EARTH MOVING MACHINE, (1) A MOVABLE SCRAPER BODY ON SAID EARTH MOVING MACHINE, (2) A GROUND ENGAGING BLADE MOUNTED ON SAID MOVABLE SCRAPER BODY, (B) A HOUSING MOUNTED ON SAID EARTH MOVING MACHINE, (1) AN ELECTRICAL TRANSMITTING DEVICE WITHIN SAID HOUSING, (2) AN ELECTRICAL CONDUCTOR CIRCUIT CONNECTED TO SAID ELECTRICAL TRANSMITTING DEVICE IN SAID HOUSING, (C) MEANS INTERCONNECTING SAID ELECTRICAL TRANSMITTING DEVICE IN SAID HOUSING WITH SAID MOVABLE SCRAPER BODY ON WHICH SAID BLADE IS MOUNTED TO IMPART PROPORTIONAL MOVEMENT THEREBETWEEN TO INDICATE THE RELATIVE POSITION OF SAID BLADE WITH RESPECT TO THE SURFACE OF THE TERRAIN BEING TRAVERSED BY SAID EARTH MOVING MACHINE, (D) ELECTRICALLY ACTUATED DEPTH INDICATING DEVICE MOUNTED ON SAID EARH MOVING MACHINE REMOTE FROM SAID HOUSING AND BEING ELECTRICALLY CONNECTED WITH SAID ELECTRICAL TRANSMITTING DEVICE, (E) A SOURCE OF ELECTRICITY CONNECTED WITHIN SAID CIRCUIT EXTENDING BETWEEN SAID ELECTRICAL TRANSMITTING DEVICE AND SAID ELECTRICALLY ACTUATED DEPTH INDICATING DEVICE, (F) REMOTELY CONTROLLED, FLUID ACTUATED ADJUSTING MEANS MOUNTED INTERMEDIATE SAID MEANS INTERCONNECTING SAID ELECTRICAL TRANSMITTING DEVICE AND SAID MOVABLE SCRAPER BODY, (G) FLUID ACTUATED REMOTE CONTROL MEANS ASSOCIATED WITH SAID EARTH MOVING MACHINE, AND (H) CONDUIT MEANS INTERCONNECTING SAID ADJUSTING MEANS AND SAID REMOTE CONTROL MEANS TO ENABLE THE ADJUSTING OF SAID MEANS INTERCONNECTING SAID ELECTRICAL TRANSMITTING DEVICE AND SAID MOVABLE SCRAPER BODY.