Communications: electrical – Continuously variable indicating – With meter reading
Patent
1995-03-08
1997-10-07
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
439502, H04Q 100
Patent
active
056753225
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cable bunch coding device.
2. Description of the Related Art
In different models of automotive vehicles, and also in electrical installations and electrical devices of different kinds, cable bunches are found in which the various cables or conductors are identified by different colors or color combinations.
Normally, a conductor or cable of given color shall be connected to another conductor or cable of the same color in different types of electrical connectors.
One known method of preventing unauthorized use of an automotive vehicle or an electric device is to provide the cable bunch with a locking device in the form of a key operated switch. One such example is the car ignition lock.
However, if some unauthorized person forces the lock, it is an easy matter for this person to connect together conductors of mutually the same colors and therewith bypass the lock. The conductors, or cables, are given the same colors in order for the mechanic who installs the system to be ware of how the different conductors in the cable bunch shall be connected-up. This facility, however, makes unauthorized use of the vehicle easier to achieve, simply by bypassing the lock.
SUMMARY OF THE INVENTION
This problem is solved by means of the present invention, which provides an electronic lock which renders unauthorized use of the vehicle, or electrical device, extremely difficult, if not impossible.
The present invention thus relates to a device for coding a cable bunch which includes a number of cables, or conductors, of mutually different colors or color combinations. A first electrical connector is present at one end of the cable bunch and a second electrical connector is connected to the device to which the cable bunch is to be connected. The electrical connectors have a number of connector pins to which said conductors are connected individually, said electrical connectors being intended to be connected together for transmission of electric current or an electric signal from one of the conductors in the cable bunch to a predetermined connector pin in the second electrical connector. There is provided along the cable bunch a locking device which includes a coding unit which is intended to break and mutually connect one or more conductors incoming to the coding unit with the same number of conductors outgoing from the coding unit so that, when connecting the conductors together, incoming conductors of different respective colors or color combinations are connected to outgoing conductors of other respective colors or color combinations, thereby to obtain a predetermined mixture of colors or color combinations of the conductors in the cable bunch upstream and downstream of the coding unit. The incoming conductors are connected in said first electrical connector to the predetermined correct connector pins with respect to the desired transmission of current or signals; and the coding unit is controlled by an electric lock which functions to control the coding unit in a manner to effect said conductor connection when the user opens the electronic lock.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to an exemplifying embodiment thereof and also with reference to the accompanying drawing, in which
FIG. 1 is a block schematic of the inventive device.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The invention is described in the following with reference to an automotive vehicle, although it will be understood that the invention is not restricted to solely this use. For instance, the invention can also be applied with cable bunches in alarm systems. Generally speaking, the invention finds application in all electrical installations where it is desired to eliminate the possibility of an unauthorized person bypassing a lock, by connecting together conductors of mutually the same color or color combinations.
FIG. 1 illustrates schematically a device for coding a cable bunch 10 which includes
REFERENCES:
patent: 4579407 (1986-04-01), Shimada
patent: 4941845 (1990-07-01), Eppley
patent: 4954101 (1990-09-01), Nelson
patent: 5293013 (1994-03-01), Takahashi
Mangels Alfred J.
Scarinus Development AB
Zimmerman Brian
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