CA1034657A - Photo lock system - Google Patents

Photo lock system

Info

Publication number
CA1034657A
CA1034657A CA227,993A CA227993A CA1034657A CA 1034657 A CA1034657 A CA 1034657A CA 227993 A CA227993 A CA 227993A CA 1034657 A CA1034657 A CA 1034657A
Authority
CA
Canada
Prior art keywords
lock system
photo
photo lock
lock
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.)
Expired
Application number
CA227,993A
Other languages
French (fr)
Inventor
Henry R. Zink
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1034657A publication Critical patent/CA1034657A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • E05B49/002—Keys with mechanical characteristics, e.g. notches, perforations, opaque marks
    • E05B49/006—Keys with mechanical characteristics, e.g. notches, perforations, opaque marks actuating opto-electronic devices
CA227,993A 1974-09-03 1975-05-28 Photo lock system Expired CA1034657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US502851A US3896345A (en) 1974-09-03 1974-09-03 Photo lock system

Publications (1)

Publication Number Publication Date
CA1034657A true CA1034657A (en) 1978-07-11

Family

ID=23999682

Family Applications (1)

Application Number Title Priority Date Filing Date
CA227,993A Expired CA1034657A (en) 1974-09-03 1975-05-28 Photo lock system

Country Status (2)

Country Link
US (1) US3896345A (en)
CA (1) CA1034657A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177657A (en) * 1976-04-16 1979-12-11 Kadex, Inc. Electronic lock system
US4411144A (en) * 1976-04-16 1983-10-25 Kadex, Inc. Electronic lock system
DE2726737A1 (en) * 1977-06-14 1978-12-21 Bernd Dipl Ing Ambrosius SECURING OR LOCKING DEVICE
US4369481A (en) * 1980-04-24 1983-01-18 David Early Electronic lock
US4534194A (en) * 1981-03-16 1985-08-13 Kadex, Incorporated Electronic lock system
US4629941A (en) * 1985-01-07 1986-12-16 Ellis Edward H Differential illumination sensitive switching circuit
FR2682206A1 (en) * 1991-10-07 1993-04-09 Pierret Jean Jacques Device for controlling access for an opening using a miniaturised bar-code system housable in an everyday object
US6169650B1 (en) * 1998-05-11 2001-01-02 John M. Albrecht Single access control system and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514611A (en) * 1968-01-26 1970-05-26 Intern Dryer Corp Electrically actuated security system
US3835297A (en) * 1970-02-05 1974-09-10 Inoue Michiro Microfilm provided with color codes and device for recording and reproducing such codes
US3787714A (en) * 1972-08-25 1974-01-22 S Berens Electronic lock and key systems employing paired key and master coding modules
US3793565A (en) * 1972-09-11 1974-02-19 G Smith Polarized light-controlled combination door lock
US3772650A (en) * 1973-02-01 1973-11-13 Folger Adams Co Control and response systems and units
US3845362A (en) * 1973-08-20 1974-10-29 B Roe Electronic lock

Also Published As

Publication number Publication date
US3896345A (en) 1975-07-22

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