CA2443452A1 - Rolling code security system - Google Patents
Rolling code security system Download PDFInfo
- Publication number
- CA2443452A1 CA2443452A1 CA002443452A CA2443452A CA2443452A1 CA 2443452 A1 CA2443452 A1 CA 2443452A1 CA 002443452 A CA002443452 A CA 002443452A CA 2443452 A CA2443452 A CA 2443452A CA 2443452 A1 CA2443452 A1 CA 2443452A1
- Authority
- CA
- Canada
- Prior art keywords
- rolling code
- code
- rolling
- security system
- fixed
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title abstract 5
- 230000005540 biological transmission Effects 0.000 abstract 2
- 230000004888 barrier function Effects 0.000 abstract 1
Landscapes
- Lock And Its Accessories (AREA)
- Selective Calling Equipment (AREA)
Abstract
A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted RF transmission and recovers the fixed code and rolling code. Upon comparison of the fixed and rolling codes with stored codes and determining that the signal has emanated from an authorized transmitter, a signal is generated to actuate an electric motor to open or close a movable barrier.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44688695A | 1995-05-17 | 1995-05-17 | |
US446,886 | 1995-05-17 | ||
CA002193846A CA2193846C (en) | 1995-05-17 | 1996-05-16 | Rolling code security system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002193846A Division CA2193846C (en) | 1995-05-17 | 1996-05-16 | Rolling code security system |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2443452A1 true CA2443452A1 (en) | 1996-11-21 |
CA2443452C CA2443452C (en) | 2008-07-29 |
Family
ID=29550701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2443452 Expired - Lifetime CA2443452C (en) | 1995-05-17 | 1996-05-16 | Rolling code security system |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2443452C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111837165A (en) * | 2017-12-21 | 2020-10-27 | 钱姆伯林集团公司 | Safety system for movable barrier operator |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8422667B2 (en) | 2005-01-27 | 2013-04-16 | The Chamberlain Group, Inc. | Method and apparatus to facilitate transmission of an encrypted rolling code |
USRE48433E1 (en) | 2005-01-27 | 2021-02-09 | The Chamberlain Group, Inc. | Method and apparatus to facilitate transmission of an encrypted rolling code |
US9148409B2 (en) | 2005-06-30 | 2015-09-29 | The Chamberlain Group, Inc. | Method and apparatus to facilitate message transmission and reception using different transmission characteristics |
US11074773B1 (en) | 2018-06-27 | 2021-07-27 | The Chamberlain Group, Inc. | Network-based control of movable barrier operators for autonomous vehicles |
WO2020028502A1 (en) | 2018-08-01 | 2020-02-06 | The Chamberlain Group, Inc. | Movable barrier operator and transmitter pairing over a network |
US10997810B2 (en) | 2019-05-16 | 2021-05-04 | The Chamberlain Group, Inc. | In-vehicle transmitter training |
-
1996
- 1996-05-16 CA CA 2443452 patent/CA2443452C/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111837165A (en) * | 2017-12-21 | 2020-10-27 | 钱姆伯林集团公司 | Safety system for movable barrier operator |
CN111837165B (en) * | 2017-12-21 | 2024-03-19 | 钱姆伯林集团有限责任公司 | Safety system for movable barrier operator |
Also Published As
Publication number | Publication date |
---|---|
CA2443452C (en) | 2008-07-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20160516 |