JPS6458780A - Card lock system - Google Patents

Card lock system

Info

Publication number
JPS6458780A
JPS6458780A JP21457187A JP21457187A JPS6458780A JP S6458780 A JPS6458780 A JP S6458780A JP 21457187 A JP21457187 A JP 21457187A JP 21457187 A JP21457187 A JP 21457187A JP S6458780 A JPS6458780 A JP S6458780A
Authority
JP
Japan
Prior art keywords
card
data
new
issue
bits
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21457187A
Other languages
Japanese (ja)
Inventor
Yasuo Ueno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kokusai Gijutsu Kaihatsu Co Ltd
Original Assignee
Kokusai Gijutsu Kaihatsu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kokusai Gijutsu Kaihatsu Co Ltd filed Critical Kokusai Gijutsu Kaihatsu Co Ltd
Priority to JP21457187A priority Critical patent/JPS6458780A/en
Publication of JPS6458780A publication Critical patent/JPS6458780A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lock And Its Accessories (AREA)

Abstract

PURPOSE: To easily and safely renew card data by changing data recorded on a card issured precedently by a specified number of bits at an unspecified position of the data to issue a new card. CONSTITUTION: This system is provided with a card issuer 12 constituted of a random number generator 15, a memory 16, a card recorder 17, separately from a lock 1 to which a lock controller 2 is connected. In this card issuer 12, only a specified number of bits in the recorded data in an unspecified position of a perecedently issued card 11 are always changed to issue a new card. The data of the new card are read out by a card reader 4 of a lock controller 2 and compared with the data of an old card 11 stored in its own interior memory 5 to transmit a locking or unlocking signal in the case when changing conditions correspond to the data. The interior memory 5 is simultaneously renewed to new data.
JP21457187A 1987-08-27 1987-08-27 Card lock system Pending JPS6458780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21457187A JPS6458780A (en) 1987-08-27 1987-08-27 Card lock system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21457187A JPS6458780A (en) 1987-08-27 1987-08-27 Card lock system

Publications (1)

Publication Number Publication Date
JPS6458780A true JPS6458780A (en) 1989-03-06

Family

ID=16657920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21457187A Pending JPS6458780A (en) 1987-08-27 1987-08-27 Card lock system

Country Status (1)

Country Link
JP (1) JPS6458780A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050036570A (en) * 2003-10-16 2005-04-20 엘지전자 주식회사 Apparatus for preventing vibration of reciprocating compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050036570A (en) * 2003-10-16 2005-04-20 엘지전자 주식회사 Apparatus for preventing vibration of reciprocating compressor

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