ZA795791B - Vital electronic code generator - Google Patents
Vital electronic code generatorInfo
- Publication number
- ZA795791B ZA795791B ZA00795791A ZA795791A ZA795791B ZA 795791 B ZA795791 B ZA 795791B ZA 00795791 A ZA00795791 A ZA 00795791A ZA 795791 A ZA795791 A ZA 795791A ZA 795791 B ZA795791 B ZA 795791B
- Authority
- ZA
- South Africa
- Prior art keywords
- code generator
- electronic code
- vital electronic
- vital
- generator
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Safety Devices In Control Systems (AREA)
- Debugging And Monitoring (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/002,765 US4234870A (en) | 1979-01-11 | 1979-01-11 | Vital electronic code generator |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA795791B true ZA795791B (en) | 1980-10-29 |
Family
ID=21702396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00795791A ZA795791B (en) | 1979-01-11 | 1979-10-29 | Vital electronic code generator |
Country Status (8)
Country | Link |
---|---|
US (1) | US4234870A (xx) |
BR (1) | BR7907822A (xx) |
CA (1) | CA1130923A (xx) |
ES (1) | ES8103404A1 (xx) |
GB (1) | GB2039401B (xx) |
IT (1) | IT1125648B (xx) |
NL (1) | NL7908971A (xx) |
ZA (1) | ZA795791B (xx) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5182543A (en) * | 1990-09-12 | 1993-01-26 | Board Of Trustees Operating Michigan State University | Miniaturized data communication and identification system |
JP3430857B2 (ja) * | 1997-05-15 | 2003-07-28 | 株式会社日立製作所 | 列車在線検知システム及び列車在線検知方法 |
US6463337B1 (en) | 1999-12-20 | 2002-10-08 | Safetran Systems Corporation | Railroad vital signal output module with cryptographic safe drive |
CZ2007694A3 (cs) * | 2007-10-08 | 2009-04-15 | Ažd Praha S. R. O. | Zpusob kontroly prvního kontrolního relé a druhého kontrolního relé kodéru cyklických kódu pro železnicní zabezpecovací zarízení a kodér cyklických kódu k provádení zpusobu |
CN101293527B (zh) * | 2007-10-29 | 2010-09-08 | 北京佳讯飞鸿电气股份有限公司 | 防止应答器监测系统对应答器造成干扰的方法及装置 |
AU2010307632B2 (en) * | 2009-10-15 | 2013-12-05 | L E Tech Co., Ltd. | Microcomputer and operation method thereof |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3445591A (en) * | 1966-01-04 | 1969-05-20 | Dale R Koehler | Generator of mathematically random entities |
US3646518A (en) * | 1970-05-05 | 1972-02-29 | Bell Telephone Labor Inc | Feedback error control system |
FR2192424B1 (xx) * | 1972-07-10 | 1974-10-25 | Cit Alcatel | |
US3885228A (en) * | 1973-06-05 | 1975-05-20 | Martin J Katz | Fail-safe electronic encoder for selectively operating railway signal indicator |
US4107253A (en) * | 1976-12-01 | 1978-08-15 | U.S. Philips Corporation | Safety and test device in a railway signalling system |
-
1979
- 1979-01-11 US US06/002,765 patent/US4234870A/en not_active Expired - Lifetime
- 1979-10-29 ZA ZA00795791A patent/ZA795791B/xx unknown
- 1979-11-09 IT IT27181/79A patent/IT1125648B/it active
- 1979-11-19 CA CA340,135A patent/CA1130923A/en not_active Expired
- 1979-11-30 BR BR7907822A patent/BR7907822A/pt unknown
- 1979-12-13 NL NL7908971A patent/NL7908971A/nl not_active Application Discontinuation
- 1979-12-14 GB GB7943158A patent/GB2039401B/en not_active Expired
-
1980
- 1980-01-10 ES ES487579A patent/ES8103404A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2039401A (en) | 1980-08-06 |
GB2039401B (en) | 1982-08-18 |
IT7927181A0 (it) | 1979-11-09 |
US4234870A (en) | 1980-11-18 |
ES487579A0 (es) | 1981-02-16 |
BR7907822A (pt) | 1980-09-23 |
IT1125648B (it) | 1986-05-14 |
ES8103404A1 (es) | 1981-02-16 |
NL7908971A (nl) | 1980-07-15 |
CA1130923A (en) | 1982-08-31 |
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