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David C Maxwell

David Saar

A device for the detection of tailgating between vehicles on a roadway. The device may emit ultrasonic signals on to a roadway and receive said reflected signals. The device has a processor adapted to use the received signals to determine the presence or absence of a vehicle. The processor also determines whether a vehicle is tailgating another vehicle by detecting if the time spacing between two sequential vehicles traveling in the same direction in the same lane is two second or less. The processor alerts a remote receiver when tailgating is detected. The device may also include a camera to take pictures of any vehicle determined to be tailgating. The device is preferably compact and easily portable.

Vehicle spacing detector and notification system

A tool is used to split the coils of a key ring so that the key ring can be easily and efficiently placed on a key or other object. In one embodiment the invention includes a pair of guides, such as ribs or slots, incorporated into the bridge of the key ring grip. One rib or slot assists in getting the key ring onto the key and the other rib or slot assists in removing the key ring from the key. Alternatively, the tool could be separate from the key ring bridge and take the form of a plate having a pair of cut-out sections on opposite sides thereof. One cut-out has a sharp leading edge on the top of the plate and the other has a sharp leading edge on the bottom of the plate. A semicircular handle is attached to one side of the plate and assists it further by widening the gap between the coils so that a key can be threaded onto the free end of the key ring.

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Pennington, NJ, United States of America

David C Maxwell