cam switch rolls along the cam and at a predetermined weight pulls the lever away from the switch button thereby disengaging the switch application_number US 73116800 A description the present invention provides a hopper feed regulator for automatically controlling the supply of feed to a feed hopper in one embodiment of the present invention the hopper feed regulator is suspended between a chicken house ceiling and an intermediate feed hopper the regulator has a first upper hanger attached to the ceiling and a second lower hanger attached to the feed hopper a bias means such as a helical spring is disposed between the upper and lower hangers the upper hanger is rigidly fixed to the regulator casing whereas the lower hanger is configured to move relative to the upper hanger in an axial direction and against the force of the spring in addition the regulator which is connected to a motor has an on off switch assembly that is activated by the relative movement of the hangers when the switch is turned on the motor is activated and feed is supplied to the feed hopper as the weight of the feed hopper decreases the weight of the hopper causes relative movement of the hangers against the force of the spring once the hangers have moved past a threshold point the switch is turned off and no further feed is supplied to the feed hopper having briefly described an embodiment of the present invention an exemplary operating environment for the present invention is.