CA972038A - Fail-safe level detector - Google Patents

Fail-safe level detector

Info

Publication number
CA972038A
CA972038A CA163,945A CA163945A CA972038A CA 972038 A CA972038 A CA 972038A CA 163945 A CA163945 A CA 163945A CA 972038 A CA972038 A CA 972038A
Authority
CA
Canada
Prior art keywords
fail
level detector
safe level
safe
detector
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
CA163,945A
Other languages
English (en)
Other versions
CA163945S (en
Inventor
John O.G. Darrow
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of CA972038A publication Critical patent/CA972038A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
    • 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
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/30—Modifications for providing a predetermined threshold before switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)
CA163,945A 1972-02-18 1973-02-16 Fail-safe level detector Expired CA972038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22758572A 1972-02-18 1972-02-18

Publications (1)

Publication Number Publication Date
CA972038A true CA972038A (en) 1975-07-29

Family

ID=22853680

Family Applications (1)

Application Number Title Priority Date Filing Date
CA163,945A Expired CA972038A (en) 1972-02-18 1973-02-16 Fail-safe level detector

Country Status (11)

Country Link
US (1) US3760192A (pt)
JP (1) JPS5242394B2 (pt)
BE (1) BE795601A (pt)
BR (1) BR7301171D0 (pt)
CA (1) CA972038A (pt)
CH (1) CH579278A5 (pt)
DE (1) DE2307629A1 (pt)
ES (1) ES411754A1 (pt)
FR (1) FR2172381A1 (pt)
IL (1) IL41541A (pt)
IT (1) IT979192B (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1455253A (en) * 1972-11-04 1976-11-10 Dunlop Ltd Signal detection circuit
US3966148A (en) * 1975-04-15 1976-06-29 Westinghouse Electric Corporation Signal threshold responsive apparatus
JPS586964B2 (ja) * 1977-03-31 1983-02-07 シャープ株式会社 電源制御方式
JP4141039B2 (ja) * 1998-06-10 2008-08-27 日本信号株式会社 閾値演算回路及びこれを用いたａｎｄゲート回路、自己保持回路及び起動信号発生回路

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213294A (en) * 1961-01-16 1965-10-19 Nippon Electric Co Signal level discriminator circuit with zener diode interrogated by bipolar pulses and biased by ternary input

Also Published As

Publication number Publication date
US3760192A (en) 1973-09-18
IL41541A (en) 1975-08-31
JPS5242394B2 (pt) 1977-10-24
FR2172381A1 (pt) 1973-09-28
IL41541A0 (en) 1973-04-30
DE2307629A1 (de) 1973-08-30
IT979192B (it) 1974-09-30
JPS4890768A (pt) 1973-11-27
BR7301171D0 (pt) 1973-10-09
CH579278A5 (pt) 1976-08-31
BE795601A (fr) 1973-08-16
ES411754A1 (es) 1976-01-01

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