ZA781409B - Fail-safe solid state logic - Google Patents

Fail-safe solid state logic

Info

Publication number
ZA781409B
ZA781409B ZA00781409A ZA781409A ZA781409B ZA 781409 B ZA781409 B ZA 781409B ZA 00781409 A ZA00781409 A ZA 00781409A ZA 781409 A ZA781409 A ZA 781409A ZA 781409 B ZA781409 B ZA 781409B
Authority
ZA
South Africa
Prior art keywords
fail
solid state
state logic
safe solid
safe
Prior art date
Application number
ZA00781409A
Other languages
English (en)
Inventor
H Sibley
Original Assignee
Gen Signal Corp
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 Gen Signal Corp filed Critical Gen Signal Corp
Publication of ZA781409B publication Critical patent/ZA781409B/xx

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/007—Fail-safe circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Logic Circuits (AREA)
  • Manipulation Of Pulses (AREA)
ZA00781409A 1977-03-18 1978-03-10 Fail-safe solid state logic ZA781409B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/779,192 US4097764A (en) 1977-03-18 1977-03-18 Fail-safe solid state logic

Publications (1)

Publication Number Publication Date
ZA781409B true ZA781409B (en) 1979-03-28

Family

ID=25115625

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00781409A ZA781409B (en) 1977-03-18 1978-03-10 Fail-safe solid state logic

Country Status (6)

Country Link
US (1) US4097764A (xx)
CA (1) CA1091307A (xx)
GB (1) GB1570864A (xx)
IT (1) IT1093208B (xx)
NL (1) NL7802932A (xx)
ZA (1) ZA781409B (xx)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336461A (en) * 1980-09-22 1982-06-22 E. I. Du Pont De Nemours And Company Fail-safe apparatus
US4812677A (en) * 1987-10-15 1989-03-14 Motorola Power supply control with false shut down protection
US6381506B1 (en) * 1996-11-27 2002-04-30 Victor Grappone Fail-safe microprocessor-based control and monitoring of electrical devices

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226648A (en) * 1962-01-29 1965-12-28 Burroughs Corp Clock system for electronic computers
US3328702A (en) * 1965-03-31 1967-06-27 Bell Telephone Labor Inc Pulse train modification circuits
GB1338983A (en) * 1971-02-10 1973-11-28 Suwa Seikosha Kk Electronic watches
US3721833A (en) * 1971-08-30 1973-03-20 Branson Instr Electronic incidence and coincidence safety control circuit
US3909632A (en) * 1972-08-21 1975-09-30 Gen Signal Corp Fail-safe logic circuitry for vehicle transportation control

Also Published As

Publication number Publication date
IT7820891A0 (it) 1978-03-03
CA1091307A (en) 1980-12-09
US4097764A (en) 1978-06-27
GB1570864A (en) 1980-07-09
NL7802932A (nl) 1978-09-20
IT1093208B (it) 1985-07-19

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