Abstract: An automatic warning signal system for a leading vehicle (e.g., an automobile, car, truck, tanker, van, bus, motor home, motorcycle, or other vehicles, etc., as well as trailers of all kinds in-tow, etc.) including a detector for detecting when a following vehicle comes within a target area too close to the rear of the leading vehicle, and a circuit for coupling a signal device and an energy source to cause the signal device to produce a warning signal to caution the driver of the following vehicle when the detector detects the following vehicle within the target area too close to the rear of the leading vehicle, causing the driver of the following vehicle to slow down and thus increase the distance between the two vehicles and prevent rear end collision in case of an emergency.

Abstract: An automatic warning signal system for a leading vehicle (e.g., an automobile, car, truck, tanker, van, bus, motor home, motorcycle, or other vehicles, etc., as well as trailers of all kinds in-tow, etc.) including a detector for detecting when a following vehicle comes within a target area too close to the rear of the leading vehicle, and a circuit for coupling a signal device and an energy source to cause the signal device to produce a warning signal which includes activating the brake light or lights of the leading vehicle without the actual application of the brakes to caution the driver of the following vehicle when the detector detects the following vehicle within the target area too close to the rear of the leading vehicle, causing the driver of the following vehicle to slow down and thus increase the distance between the two vehicles and prevent rear end collision in case of an emergency.

Abstract: The present invention is a safety toothbrush with wear indicator. The safety toothbrush provides a safety feature to the conventional toothbrush by attaching a soft bumper to the end of the toothbrush head. The toothbrush head holds the tufts for brushing and is opposite the handle end. The soft bumper is preferably made of an impact absorbing material such as rubber, either natural or synthetic or in the form of the an air cushion, and is attached to the end of the toothbrush head by means of adhesive or embedment or both. The soft bumper is of sufficient thickness to render its effectiveness. An additional useful feature of the safety toothbrush is that the soft bumper is attached in such a manner that the soft bumper or a portion of the soft bumper will become disengaged with the toothbrush head after the toothbrush has experienced a certain amount of wear.