Abstract: A system and device for locking an automobile steering axis according to the present invention is an automobile stealing prevention device permanently installed in an automobile provided with of an electrical-electronic system to control the lock and unlock mechanism of the automobile steering axis to facilitate locking operation. When the locking device according to the invention is in locked state the steering wheel of the automobile is unable to turn as usual. Moreover, the efficiency in preventing stealing is enhanced by providing a control unit to control the start system and the mobility system of the automobile including an anti-theft alarm system so as to deactivate the start system and the mobility system of the automobile so that they cannot be operated in the locked state according to the invention. If an abnormal incident occurs, the anti-theft alarm system will send signals to the owner or authorized persons.

Abstract: The device for electrically locking the brake of an automobile according to the present invention is a device for theft prevention provided with a system of mechanism for acting on the brake system to stop the wheel from moving and thereby disabling movement of the car. This device is provided with a burglar alarm system for alerting the owner of automobile, persons, or organization concerned by transmitting radio waves to a radio receiver circuit carried by the owner of automobile and instructing the system to make a telephone call to a predetermined number, further including other means of communication. The device for electrically locking the brake of an automobile with execute the locking the brake and informing the owner of automobile, persons, or organization concerned only when the burglar alarm system is activated.

Abstract: An electric locking device for locking brake, clutch, and/or accelerator pedal of an automobile according to the present invention brings an electrical system to work together with a mechanism to facilitate the use and increased efficiency in prevention of theft. Users of this device no longer need to bend and pull a part of the locking device in order to lock and no longer need to use a key to unlock the master lock. This locking device will operate only when a decoder receives an instruction signal to lock and unlock from an encoder. The decoder then sends a signal to give instruction to a control circuit to send an output to control the operation of various theft prevention systems working together with the present invention; and also to send another signal to a driver circuit to drive a motor to rotate and force the locking mechanism to carry a locking member into the locking or unlocking positions.