NASA NTRS · 19730000123
Brake wear warning device: A concept
Abstract
Heat-insulated wire is introduced through brake shoe and partially into brake lining. Wire is connected to positive terminal and light bulb. When brakes wear to critical point, contact between wire and wheel drum grounds circuit and turns on warning light.
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Hawkins, S. F.. 1973-05-01. Brake wear warning device: A concept. https://ntrs.nasa.gov/citations/19730000123
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