Patent EP0073068A2 successfully refreshed from Google Patents.
EP0073068A2
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EP
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Theft prevention system in an automotive keyless entry system with automatic door locking
Assignee: Nissan Motor Co Ltd
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Filing: 1982-08-26
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Granted: —
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Expires: 2002-08-26
Abstract
Abstract A theft preventive system, in an automotive keyless entry system with automatic door locking, is adapted to produce an alarm signal in response to door opening when the theft preventive system is in a door-locked position, and which is cooperative with a door-lock system but independently operable in order to switching its operating mode from a door-locked mode to a door-unlocked mode. The theft preventive system in an automotive keyless entry system, according to the present invention. includes a push-button-type function key (10) for operating a door-lock mechanism (50) to lock a vehicle door. A memory circuit (30) is responsive to a door-lock signal fed from the door-lock function key (10) to indicate the door-locked condition. The content of the memory (30) cannot be cleared unless a plurality of door-unlock function keys (10a-10e) are properly I operated. An alarm circuit (70) is responsive to a door-open signal from a door switch in the presence of a memory output indicative of the door-locked condition to produce an alarm signal.
Inventors
- 👤 Haruo Mochida
- 👤 Hirotoshi Namazue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 10:20
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00674; G07C9/0069
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A theft prevention system in an automotive keyless entry system comprising: a vehicle door-lock mechanism (50); an actuator (52,54) associated with said door-lock mechanism to operate the latter between a first door-locked position and a second door-unlocked position characterized by first meansvtor operating- said actuatorvto said first position; second means (10,40,45) for operating said actuator (54)to said second position; third means (30) associated with said first and second means, for producing a first signal when said actuator is maintained at said first position, said third means being responsive to operation of said first means to the first position to produce said first signal and being (10,40) responsive to operation of said second means to stop producing said first signal; fourth means (41) for producing a second signal in response to opening of the vehicle door; and (42,43,30) fifth means for producing a theft preventive alarm in the presence of both of said first and second - signals.
Claim 2
Dependent Claim
157 words
A theft prevention system in an automotive keyless entry system comprising: a vehicle door-lock mechanism (50); an actuator (52,54) associated with said door-lock mechanism to operate the latter between a first door-locked position and a second door-unlocked position characterized by first meansvtor operating- said actuatorvto said first position; second means (10,40,45) for operating said actuator (54)to said second position; third means (30) associated with said first and second means, for producing a first signal when said actuator is maintained at said first position, said third means being responsive to operation of said first means to the first position to produce said first signal and being (10,40) responsive to operation of said second means to stop producing said first signal; fourth means (41) for producing a second signal in response to opening of the vehicle door; and (42,43,30) fifth means for producing a theft preventive alarm in the presence of both of said first and second - signals.
Claim 3
Dependent Claim
141 words
A theft prevention system in an automotive keyless entry system comprising: a vehicle door-lock mechanism; an actuator associated with said door-lock mechanism to operate the latter between a first door-locked position and a second door-unlocked position characterized by (10f) first means for producing a door-lock signal to operate said actuator to said first position; second means (10a-10e,41) producing a door-unlock signal to operate said actuator to. said. second position; third, means (30) associated with said first and second means, for producing a first signal in response to said door-lock signal, said third means being responsive to said door-unlock signal to ,stop producing said first signal; (41) fourth meansvfor producing a second signal in response to opening of the vehicle door; and fifth means (42,43,20,30) for producing a theft preventive alarm in the presence of both of said first and second signal.
Claim 4
Dependent Claim
141 words
A theft prevention system in an automotive keyless entry system comprising: a vehicle door-lock mechanism; an actuator associated with said door-lock mechanism to operate the latter between a first door-locked position and a second door-unlocked position characterized by (10f) first means for producing a door-lock signal to operate said actuator to said first position; second means (10a-10e,41) producing a door-unlock signal to operate said actuator to. said. second position; third, means (30) associated with said first and second means, for producing a first signal in response to said door-lock signal, said third means being responsive to said door-unlock signal to ,stop producing said first signal; (41) fourth meansvfor producing a second signal in response to opening of the vehicle door; and fifth means (42,43,20,30) for producing a theft preventive alarm in the presence of both of said first and second signal.
Claim 5
Dependent Claim
45 words
The system as set forth in claim 1 or 2, wherein (10) said second means comprises an input unit v for inputting a (41) code and a comparator for comparing said input code with a preset code to operate said actuator to said second position.
Claim 6
Dependent Claim
32 words
The system as set forth in claim 3, wherein said third means comprises a memory which is adapted to produce said first signal while said actuator is maintained at said -first position.
Claim 7
Dependent Claim
22 words
The system as set forth in claim 3, wherein said input code- and said preset code both consist of several encoded digits.
Claim 8
Independent Claim
24 words
The system- as set forth in ciaim 5, wherein said input unit (10) comprises a plurality of push buttons (10a-10f) respectively representing preset values.
Claim 9
Independent Claim
24 words
The system- as set forth in ciaim 5, wherein said input unit (10) comprises a plurality of push buttons (10a-10f) respectively representing preset values.
Claim 10
Dependent Claim
29 words
The system as set forth in claim 6, wherein said first means comprises one of said push buttons in said input unit, which acts as a door-lock function key.
References Cited (Backward Citations)
No citation records indexed.
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