Automatic door coser

Claim 1

APPARATUS FOR CLOSING A DOOR CONNECTABLE WITH A JAMB COMPRISING A TAPE, MEANS FOR DRIVING SAID TAPE IN ONE DIRECTION, A CABLE CONNECTED AT ONE END TO ONE END OF SAID TAPE, A PLATE HAVING A SPINDLE MOUNTED ON SAID DOOR, A SHEAVE ROTATABLY MOUNTED ON SAID SPINDLE AND HAVING MEANS FOR STOPPING ROTATION OF SAID SHEAVE IN ONE DIRECTION, A DETENT PIVOTALLY MOUNTED ON SAID SHEAVE, SAID DETENT HAVING A FOOT EXTENDING SUBSTANTIALLY AT RIGHT ANGLES THERETO, SPROCKET MEANS ROTATABLY MOUNTED ON SAID SPINDLE, CAM MEANS ON SAID SPROCKET MEANS NORMALLY ENGAGEABLE WITH SAID DETENT FOOT, SAID CABLE BEING CONNECTED TO SAID SPROCKET AND EXTENDING OVER SAID DETENT FOOT, RACK MEANS MOUNTED ON SAID JAMB WHEREBY WHEN SAID DOOR IS OPEN AND SAID MEANS FOR DRIVING SAID TAPE IS ENERGIZED THE SLACK IN SAID CABLE WILL BE TAKEN UP AND THE DOOR WILL BE MOVED TOWARDS CLOSED POSITION UNTIL THE SPOCKET ENGAGES SAID RACK TO ROTATE SAID SPROCKET AND RELEASE SAID DETENT FOOT FROM SAID CAM THEREBY PERMITTING ROTATION OF SAID SHEAVE AND PERMITTING THE DETENT FOOT TO DRIVE THE SPROCKET AGAINST THE RACK TO URGE THE DOOR INTO FULLY CLOSED POSITION.