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US 5,289,177 AGranted
Burglarproof device for vehicle
OwnerKiyoyasu Wakeinventor
Life of this patent
Estimating the term…
Abstract
This invention relates to a burglarproof key cylinder lock which comprises an outer tubular member, and an inner tubular member rotatably provided within the outer tubular member. A properly coded magnet key is inserted into the inner tubular member. The outer tubular member is provided with at least one switch member therein which is turned ON when a properly coded magnet key is inserted into the inner tubular member. An input signal discrimination circuit is provided for cutting off output signals to supply elements essential for the operation of an engine for a vehicle in case a key other than the properly coded key is inserted.
Claims19
A burglarproof ignition device for a vehicle comprising:
- a key cylinder lock for the vehicle including an outer tubular member and an inner tubular member rotatably provided within said outer tubular member,
- a plurality of axially aligned radially extending holes in said outer tubular member,
- a plurality of axially aligned grooves in said inner tubular member aligned radially with said plurality of axially aligned radially extending holes in said outer tubular member,
- a properly coded magnet key adapted to be inserted into said inner tubular member, with a magnet positioned thereon to align with at least some of said grooves in said inner tubular member, a spring loaded magnet pin positioned in each of said plurality of axially aligned radially extending holes in said outer tubular member which correspond radially to a magnet positioned on said key, each of said spring loaded magnet pins extend into each of said grooves in said inner tubular member which correspond to the magnets on said key and which are biased toward said inner tubular member,
- a switch member provided in each of said radially extending holes in said outer tubular member which include a spring loaded magnet pin, each switch member is closed in response to insertion of said properly coded magnet key into said inner tubular member and opened in response to removal of said properly coded magnet key,
- an information receive discrimination circuit for carrying out a receive discrimination with respect to presence and absence of power supply signals respectively delivered via each said switch member by a power delivered from a battery as a power supply mounted in said vehicle,
- an information collative judgment circuit adapted to receive an information signal from said information receive discrimination circuit to make a comparative collation between storage information provided by making reference to a specific code memory circuit in which specific codes corresponding to combinations of open and closed states of each said switch member are stored in advance, and said information signal, and a central processing until are operative to deliver output signals to supply elements essential for the operation of an engine for the vehicle only when it receives, from said information collative judgment circuit, a correspondence signal indicating that said storage information and said information signal are in correspondence with each other.
4 more elements
A burglarproof ignition device for a vehicle comprising:
- a key cylinder lock for the vehicle including an outer tubular member and an inner tubular member rotatably provided within said outer tubular member,
- a plurality of axially aligned radially extending holes in said outer tubular member,
- a plurality of axially aligned grooves in said inner tubular member aligned radially with said plurality of axially aligned radially extending holes in said outer tubular member,
- a properly coded magnet key adapted to be inserted into said inner tubular member, with magnets positioned thereon to align with at least some of said grooves in said inner tubular member, a spring loaded magnet pin tumbler positioned in each of said plurality of axially aligned radially extending holes in said outer tubular member which corresponds radially to a magnet positioned on said key, each of said spring loaded magnet pin tumblers extend into each of said grooves in said inner tubular member which correspond to the magnets on said key and which are biased toward said inner tubular member,
- a magnetic responsive switch member provided in each of said radially extending holes in said outer tubular member that contains a spring loaded magnet pin tumbler, each of said magnetic responsive switch members is closed in response to insertion of said properly coded magnet key into said inner tubular member and opened in response to removal of said properly coded magnet key, and
- input signal discrimination means for cutting off output signals to power supply elements essential for the operation of an engine for the vehicle in the case of the insertion of a key other than said properly coded magnet key.
3 more elements
A burglarproof ignition device for a vehicle comprising:
- a key cylinder lock for the vehicle including an outer tubular member and an inner tubular member rotatably provided within said outer tubular member,
- a properly coded magnet key adapted to be inserted into said inner tubular member, said properly coded magnet key including a mechanical coding along one edge of said key and a magnetic coding along the opposite edge of said key,
- a plurality of axially aligned radially extending holes in said outer tubular member,
- a plurality of axially aligned grooves in said inner tubular member aligned radially with said plurality of axially aligned radially extending holes in said outer tubular member,
- a magnetically operated switch member provided in each of said radially extending holes in said outer tubular member, each of which is closed in response to insertion of said properly coded magnet key, and each of which is opened in response to removal of said properly coded magnet key,
- an additional switch member which becomes closed in response to the rotation of said magnet key in said inner tubular member, and
- input signal discrimination means for cutting off output signals to power supply elements essential for the operation of an engine for the vehicle in the case of attempted use of a key other than said properly coded magnet key, said input signal discrimination means including an AND circuit which receives an input from each magnetically operated switch member provided in said radially extending holes and from said additional switch member.
4 more elements
Dependencies are inferred from the claim text.