Button-type code car-switch controller
OwnerJui-Shiuan Leuinventor
Life of this patent
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Abstract
This invention relates to a button-type code car-switch controller, especially one which can turn on and off the car switches with the signal sent by the code operating circuit and control circuit formed by such electronic elements as transistor-transistor logic (TTL) and with the alarm interface circuit, can work together with various alarm systems so as to protect the car against thief, robbery and wire cutting-off. While the set code can be changed after the car switch is turned on, the alarm can be activated when a wrong code is keyed in. With this controller the car can be operated without conventional keys.
Claims4
A button-type code car-switch controller, comprising:
- a keyboard having number keys and control keys for producing data codes;
- a logic IC operatively connected to said keyboard;
- an anti-theft device control system operatively connected to said logic IC;
- a pulse signal generating circuit in said logic IC for producing an activating pulse to cause data codes input to said logic IC from said number keys of said keyboard to be memorized and compared as the codes are keyed in;
- a counter for counting the correct data codes keyed in, and causing an output in response thereto to activate the car-switch control system;
- an error detecting circuit means for turning on an anti-theft device control system in response to the detection of the input of incorrect data codes, wherein said anti-theft device includes a line cut preventing means for activating an alarm if a line of the anti-theft device is cut;
- an interface circuit operatively connected to said error detecting means and to an anti-robbery device, said interface circuit being responsive to the input of incorrect data codes to activate said anti-robbery device;
- a write-in control circuit means in response to the signal keyed in a memory key after the keying in and acceptance of said data codes, for changing the acceptable data codes by generating a write-in signal to activate an address controller and a register from said activating pulse from said pulse control generating circuit as a numerical code is keyed in;
- wherein said switch control system includes three switch relays operated by three corresponding transistors, to control an ACC switch, an IGN switch, and a START switch, respectively, in response to a pulse produced after the input data codes are determined to be correct, and further wherein some switches are turned off with the pulse produced as a WIPE key is depressed because the pulse can switch off the IGN switch control circuit and turn off the IGN relay and START relay.
Dependencies are inferred from the claim text.