Abstract: My invention is the state of the art in how to indicate how hard brakes are being apply to other drivers allowing them to adjust for your rate of braking.

Abstract: A low pressure, tread wear and speed indicator for a tire includes at least one abutment member secured to the exterior surface of one of the sidewalls of the tire adjacent to the tread, which projects laterally outward from the sidewall. The abutment member is positioned at a distance radially inwardly from the tread such that, upon tire deflation or excessive tread wear or a combination thereof, the abutment will strike the road surface during vehicle operation, to produce a vibrational and/or audible signal perceivable by the driver, indicating an unsafe tire condition. The indicator may also include a weighted insert embedded within the abutment member which, upon operation of the vehicle at an excessive or illegal rate of speed, will produce an eccentric tire condition which, in turn, causes a vibrational signal. A tire deflation indicator which includes a segmented radially-extending rib formed on the interior surface of the tire sidewall is also provided.

Abstract: A device for indicating the wear of a brake lining on a brake shoe consisting of a stud having a central aperture and secured within the opening of the brake shoe, and a rivet pin slidably disposed in the aperture of the stud and having an enlarged head disposed a predetermined depth below the wearing surface of the lining, and a spring indicating means coupled to the opposite end of said rivet pin and secured to the stud for biasing the rivet with a withdrawal force with respect to the stud so that when the head of the rivet pin is worn away at a predetermined brake lining depth, the pin will be withdrawn from the lining and a free projecting end of the spring will engage the rotating brake drum to produce an audible warning sound. In another embodiment a rivet is used only to secure the spring to the brake shoe. In other embodiments the rivet is eliminated and the spring is used in conjunction with a stud so that when the stud wears away, the spring will project against the rotating brake drum.