Electro magnets on a bar mounted on wheels and trailed after a car make the streets of Universal City, California, safe for motorists. The magnets pick up nails, tacks, pieces of wire, lost bolts and nuts and a wide variety of other metal objects which if left in the streets would cause punctures and other tire trouble. Frank Graves, electrical chief of the city, invented the puncture fighter.
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| Car with magnetic trailer makes streets safe. |
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