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Car key in ignition Car ignition and steering wheel lock. A car key or an automobile key is a key used to open and/or start an automobile. Modern key designs are usually symmetrical, and some use grooves on both sides, rather than a cut edge, to actuate the lock. It has multiple uses for the automobile with which it was sold.
The electric immobiliser/alarm system was invented by St. George Evans and Edward Birkenbuel and patented in 1919. [2] They developed a 3x3 grid of double-contact switches on a panel mounted inside the car so when the ignition switch was activated, current from the battery (or magneto) went to the spark plugs allowing the engine to start, or immobilizing the vehicle and sounding the horn. [3]
However, many new vehicles have been equipped with so-called "keyless" systems, which replace the key switch with a push button that also requires a transponder signal. The ignition locking system may be sometimes bypassed by disconnecting the wiring to the switch and manipulating it directly; this is known as hotwiring .
Tesla says parts of the technology are in beta mode, such as "autosteer," meaning they are still being tested. Tesla sells the product to drivers for $8,000 upfront or $99 per month.
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The patent describes the capability to connect the license plate to a centralized system for registration control, and a method whereby the centralized system can update the license plate display. Two examples are given; 1) in the situation where the vehicle is involved in a crime, or 2) where the registration is no longer valid.
There is one account in 1992 of a thief in New York City rocking a car to deliberately trigger its alarm in order to help conceal the sound of a breaking window. [7] Because of the large number of false alarms with car alarms, many vehicle manufacturers no longer factory-fit simple noise-making alarms, instead offering silent immobilizers. [8]
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