Patent for a new and improved automatic car brake. This design "consists, first, in the combination of the draw-heads . . . connecting-rods . . . and a partially-rotating shaft provided with suitable slotted cams, which cams are attached to the brake-beams, so that when the draw-heads are forced inward or drawn out the brakes will move out of contact with the wheels; second, in the combination, with the slotted cams and a mechanism for moving them, of the rods which are connected thereto, and which pass through the brake-beams, the sliding sleeves, the springs, and the nuts" (lines 13-27).