| 摘要 |
A vehicle movement warning device particularly designed to deter vehicle theft by emitting a loud clatter if the vehicle is moved without authorization. Advantageously, the device also deters vehicle movement by providing a frictional impediment to movement, without damage to the vehicle. The device includes a pair of waffle surfaces, the first waffle surface being mounting to a wheel for rotation with the wheel. A releasable shift mechanism mounts the second waffle surface to the vehicle in a position for selective shifting movement into and out of engagement with the wheel-mounted waffle surface. Preferably, the shift mechanism comprises a spring biasing the second waffle surface into engagement with the wheel-mounted waffle surface and a solenoid for withdrawing and holding the second waffle surface out of engagement with the wheel-mounted waffle surface. A switch allows the vehicle driver to disconnect power to the solenoid, the waffle surfaces being biased into meshing engagement by the spring with power removed from the solenoid. Movement of the vehicle with the waffle surfaces meshed is frictionally impeded and produces a loud clatter as the undulations of the waffle surfaces slip past each other. |
