Door checks, notably for automobile doors

Claim 1

A DOOR CHECK FOR AN AUTOMOBILE DOOR ASSEMBLY WHICH INCLUDES TWO ELEMENTS CONSTITUTED OF AN UPRIGHT AND A DOOR PANEL PIVOTED TO THE UPRIGHT, SAID DOOR CHECK PERMITTING AT THE SAME TIME THE MAINTENANCE OF THE DOOR PANEL IN A SELECTED OPEN POSITION AND ITS RETURN TO A CLOSED POSITION AND COMPRISING A SPRING ANCHORED TO ONE OF THE TWO ELEMENTS, A CAM INTEGRAL WITH THE OTHER ELEMENT, SAID SPRING BEING OF A ROUND STEEL WIRE BENT SO AS TO HAVE TWO SYMMETRICAL BRANCHES CONNECTING AT RIGHT ANGLES TO A CENTER STIRRUP, SAID STIRRUP HAVING A BIGHT PORTION WHICH CONSTITUTES AN ENGAGING FINGER RESTING ON AND CONTACTING THE CAM, AN ATTACHMENT ELEMENT FOR EACH OF SAID BRANCHES, SAID BRANCHES BEING TRUNNIONED IN SAID ATTACHMENT ELEMENTS PARALLEL TO THE ENGAGING FINGER AND EXTENDING THEREFROM IN THE FORM OF A LOOP TERMINATING IN A RIGHT ANGLE, BENT EXTREMITIES ANCHORED IN THE ATTACHMENT ELEMENTS AT RIGHT ANGLE TO THE TRUNNIONING PART OF THE BRANCHES, SAID CAM HAVING AT LEAST ONE NOTCH ADJACENT ITS END OF THE STROKE IN THE OPEN POSITION OF THE DOOR IN WHICH THE ENGAGING FINGER CAN LODGE FOR A SELECTED OPEN POSITION AND FROM WHICH SAID FINGER CAN BE DISLODGED ONLY BY EXERTING ON THE DOOR A CONSIDERABLE EFFORT, SAID CAM PRESENTING A PROFILE, THE CURVATURE OF WHICH IS ECCENTRIC WITH RESPECT TO THE PIVOTAL AXIS OF THE DOOR PANEL SO THAT THE EFFORT OF THE FINGER RESTING ON THE CAM PRODUCES A COUPLING WHICH TENDS TO CLOSE THE DOOR.