US3839710A - Access apparatus control system - Google Patents
Access apparatus control system Download PDFInfo
- Publication number
- US3839710A US3839710A US00320904A US32090473A US3839710A US 3839710 A US3839710 A US 3839710A US 00320904 A US00320904 A US 00320904A US 32090473 A US32090473 A US 32090473A US 3839710 A US3839710 A US 3839710A
- Authority
- US
- United States
- Prior art keywords
- timing pulse
- keyboard
- switches
- comparator
- key element
- 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 - Lifetime
Links
- 230000000694 effects Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
- G07C9/00674—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons
- G07C9/0069—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons actuated in a predetermined sequence
Abstract
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00320904A US3839710A (en) | 1973-01-04 | 1973-01-04 | Access apparatus control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00320904A US3839710A (en) | 1973-01-04 | 1973-01-04 | Access apparatus control system |
Publications (1)
Publication Number | Publication Date |
---|---|
US3839710A true US3839710A (en) | 1974-10-01 |
Family
ID=23248337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00320904A Expired - Lifetime US3839710A (en) | 1973-01-04 | 1973-01-04 | Access apparatus control system |
Country Status (1)
Country | Link |
---|---|
US (1) | US3839710A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4021796A (en) * | 1975-10-15 | 1977-05-03 | Detect-All Security Systems, Inc. | Pushbutton purmutation code control means for a security alarm system |
US4103289A (en) * | 1976-04-27 | 1978-07-25 | Steven Kolber | Calculator theft prevention device |
US4234784A (en) * | 1978-01-17 | 1980-11-18 | Thorn Domestic Appliances (Electrical) Limited | Cooking appliance controls |
GB2221072A (en) * | 1988-07-18 | 1990-01-24 | Samsung Electronics Co Ltd | Programmable sequential-code recognition circuit |
US5153572A (en) * | 1990-06-08 | 1992-10-06 | Donnelly Corporation | Touch-sensitive control circuit |
EA000030B1 (en) * | 1995-03-24 | 1998-02-26 | Воронежская Областная Коллегия Адвокатов №2 | Device for object's security |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2484226A (en) * | 1947-10-17 | 1949-10-11 | Bell Telephone Labor Inc | Indicating circuit |
US3610943A (en) * | 1970-05-11 | 1971-10-05 | Trevor O Jones | Vehicle operation inhibitor control system |
US3691396A (en) * | 1971-08-09 | 1972-09-12 | Gen Motors Corp | Electronic combination door and ignition lock |
US3755776A (en) * | 1972-04-07 | 1973-08-28 | Gen Motors Corp | Vehicle operation inhibitor control system |
-
1973
- 1973-01-04 US US00320904A patent/US3839710A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2484226A (en) * | 1947-10-17 | 1949-10-11 | Bell Telephone Labor Inc | Indicating circuit |
US3610943A (en) * | 1970-05-11 | 1971-10-05 | Trevor O Jones | Vehicle operation inhibitor control system |
US3691396A (en) * | 1971-08-09 | 1972-09-12 | Gen Motors Corp | Electronic combination door and ignition lock |
US3755776A (en) * | 1972-04-07 | 1973-08-28 | Gen Motors Corp | Vehicle operation inhibitor control system |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4021796A (en) * | 1975-10-15 | 1977-05-03 | Detect-All Security Systems, Inc. | Pushbutton purmutation code control means for a security alarm system |
US4103289A (en) * | 1976-04-27 | 1978-07-25 | Steven Kolber | Calculator theft prevention device |
US4234784A (en) * | 1978-01-17 | 1980-11-18 | Thorn Domestic Appliances (Electrical) Limited | Cooking appliance controls |
GB2221072A (en) * | 1988-07-18 | 1990-01-24 | Samsung Electronics Co Ltd | Programmable sequential-code recognition circuit |
GB2221072B (en) * | 1988-07-18 | 1992-04-08 | Samsung Electronics Co Ltd | Programmable sequential-code recognition circuit |
US5153572A (en) * | 1990-06-08 | 1992-10-06 | Donnelly Corporation | Touch-sensitive control circuit |
EA000030B1 (en) * | 1995-03-24 | 1998-02-26 | Воронежская Областная Коллегия Адвокатов №2 | Device for object's security |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIGGIE INTERNATIONAL INC. Free format text: CHANGE OF NAME;ASSIGNOR:A-T-O INC.;REEL/FRAME:003866/0442 Effective date: 19810623 |
|
AS | Assignment |
Owner name: FIGGIE INTERNATIONAL INC. Free format text: MERGER;ASSIGNOR:FIGGIE INTERNATIONAL INC., (MERGED INTO) FIGGIE INTERNATIONAL HOLDINGS INC. (CHANGED TO);REEL/FRAME:004767/0822 Effective date: 19870323 |
|
AS | Assignment |
Owner name: CASI-RUSCO INC., 552 NORTHWEST 77TH STREET, BOCA R Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FIGGIE INTERNATIONAL INC.;REEL/FRAME:004845/0290 Effective date: 19880201 Owner name: CASI-RUSCO INC.,FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FIGGIE INTERNATIONAL INC.;REEL/FRAME:004845/0290 Effective date: 19880201 |