Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1995-09-22
1997-12-09
Swarthout, Brent A.
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
350428, 35082531, 307 102, 307 106, 180287, B60R 2510, B60R 2500
Patent
active
056964820
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a safety system of the type set forth below.
Safety systems for protecting movable objects are known in a variety of forms. Typical examples of them are alarm systems of motor vehicles, although the same basic ideas can be applied for example to cases, computers and the like which are to be protected from unauthorized use or removal. It is known that such safety systems can be put out of operation or rendered inoperative by experienced persons within a relatively short time, for example by overbridging and/or removal of ignition locks and/or alarm contacts.
The invention is based on the problem of providing a safety system of the type mentioned at the beginning which provides substantially greater safety against unauthorized use or removal of an object, the intended function of the object to be protected no longer being possible when one or more of the safety elements of the safety system is destroyed or rendered inoperative.
This problem is solved by the features set forth in the characterising clause of claim 1.
Advantageous embodiments and further developments of the invention will be apparent from the subsidiary claims.
With the configuration of the safety system according to the invention it is not possible to put said system out of operation by bridging one of the Safety elements, for example in the form of a state indicator and/or state transducer, because in this case not all the code signals are then properly transmitted via the common information transmission channel. The at least one surveillance unit and/or at least some of the state indicators and state transducers contain control units in which information is stored on all or at least a predetermined number of the code signals used in the system and which monitor the code signals transmitted via the common information transmission channel, the function indicated or controlled by the respective control unit being blocked when not all or not the number of code signals assigned to said control unit are present in the system.
For explanation reference will be made to the example of motor vehicles in which the at least one surveillance unit contains for example the central control unit for the engine functions in such a manner that said surveillance unit cannot be separated from the control unit without destroying all the functions.
Respective code signals are assigned to this at least one surveillance unit and the individual state transducers and indicators and the exchange of one of these elements leads to a "foreign" code signal or even no code signal at all being introduced into the system, this leading immediately to failure of the surveillance units and/or the state indicators and transducers which likewise contain control units monitoring the safety system for correct presence of the code signals.
Since the encoders and decoders of the state indicators and state transducers can be constructed very simply by using integrated circuits, such state indicators may for example be door contacts, oil pressure pickups, temperature pickups and the like, so that a large number of such state indicators can be distributed in the safety system without high cost expenditure. The same applies to the state transducers which may for example control lighting means, starters and the like.
Due to the fact that a control unit in which information on a further predetermined number of code signals is stored is likewise associated with at least one further state indicator or state transducer, the unauthorized use of the protected object by exchanging a surveillance unit is prevented. The state indicators and transducers provided with control units may be distributed in relatively random manner, which can easily be changed from one object to another, in the object, and this makes removal of the individual modules of the safety system extremely difficult, if not impossible.
Since a plurality of different code signals can be assigned to each of said state indicators and transducers and these signals are practically impossible to determine or a
REFERENCES:
patent: 4380225 (1983-04-01), Wedemeyer et al.
patent: 4777468 (1988-10-01), Eustache et al.
patent: 4888575 (1989-12-01), De Vaulx
patent: 4940964 (1990-07-01), Dao
patent: 5006843 (1991-04-01), Hauer
patent: 5023591 (1991-06-01), Edwards
patent: 5091856 (1992-02-01), Hasegawa et al.
patent: 5365225 (1994-11-01), Bachuber
patent: 5418519 (1995-05-01), Hino et al.
patent: 5481253 (1996-01-01), Phelan et al.
patent: 5514914 (1996-05-01), Sellem et al.
patent: 5521443 (1996-05-01), Imura et al.
patent: 5535844 (1996-07-01), Samford
Kaiser Hans Christian
Schmitt Udo
Wolm Holger
Kaiser Hans Christian
Swarthout Brent A.
Trieu Van T.
LandOfFree
Safety system for protecting movable objects does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Safety system for protecting movable objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety system for protecting movable objects will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1610729