FR2440038A1 - Alarm indicator for aircraft instrumentation - utilises micro torque motor controlled from logic circuit to drive indicator flag - Google Patents

Alarm indicator for aircraft instrumentation - utilises micro torque motor controlled from logic circuit to drive indicator flag

Info

Publication number
FR2440038A1
FR2440038A1 FR7830540A FR7830540A FR2440038A1 FR 2440038 A1 FR2440038 A1 FR 2440038A1 FR 7830540 A FR7830540 A FR 7830540A FR 7830540 A FR7830540 A FR 7830540A FR 2440038 A1 FR2440038 A1 FR 2440038A1
Authority
FR
France
Prior art keywords
indicator
flag
torque motor
rotor
valid
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
Application number
FR7830540A
Other languages
French (fr)
Other versions
FR2440038B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7830540A priority Critical patent/FR2440038A1/en
Publication of FR2440038A1 publication Critical patent/FR2440038A1/en
Application granted granted Critical
Publication of FR2440038B1 publication Critical patent/FR2440038B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/26—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with reset means necessitating a separate operation to return the indicator element

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)

Abstract

The alarm indicator provides a visual warning of a failure in aircraft instrumentation. An indicator connected to a logic control circuit shows that the information is not valid. A micro-torque motor eliminates use of a spiral spring system to reduce volume and energy consumption. An indicator comprises a soft iron armature (1) on which a coil is wound. A rotor (3) magnetised diametrically is able to turn within the inductive field within a range defined by limit steps (4, 5). The rotor carries a visual indicator flag (6). A logic monitoring circuit is coupled to the coil to generate a magnetic field whose polarity is the same as that of the rotor. When a valid signal is present, this causes the flag to be hidden by a mark. When the power fails, or the signal is no longer valid, the flag becomes visible.
FR7830540A 1978-10-27 1978-10-27 Alarm indicator for aircraft instrumentation - utilises micro torque motor controlled from logic circuit to drive indicator flag Granted FR2440038A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7830540A FR2440038A1 (en) 1978-10-27 1978-10-27 Alarm indicator for aircraft instrumentation - utilises micro torque motor controlled from logic circuit to drive indicator flag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7830540A FR2440038A1 (en) 1978-10-27 1978-10-27 Alarm indicator for aircraft instrumentation - utilises micro torque motor controlled from logic circuit to drive indicator flag

Publications (2)

Publication Number Publication Date
FR2440038A1 true FR2440038A1 (en) 1980-05-23
FR2440038B1 FR2440038B1 (en) 1983-10-07

Family

ID=9214206

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7830540A Granted FR2440038A1 (en) 1978-10-27 1978-10-27 Alarm indicator for aircraft instrumentation - utilises micro torque motor controlled from logic circuit to drive indicator flag

Country Status (1)

Country Link
FR (1) FR2440038A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601555A1 (en) * 1992-12-09 1994-06-15 Canon Denshi Kabushiki Kaisha Light quantity control device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1073139A (en) * 1953-03-20 1954-09-20 Oerlikon Maschf Electromagnetic position indicator
FR1423384A (en) * 1964-02-03 1966-01-03 Ferranti Ltd Character rendering device
FR1533728A (en) * 1966-08-08 1968-07-19 Cons Electronics Ind Magnetically actuated electrical indicator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1073139A (en) * 1953-03-20 1954-09-20 Oerlikon Maschf Electromagnetic position indicator
FR1423384A (en) * 1964-02-03 1966-01-03 Ferranti Ltd Character rendering device
FR1533728A (en) * 1966-08-08 1968-07-19 Cons Electronics Ind Magnetically actuated electrical indicator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601555A1 (en) * 1992-12-09 1994-06-15 Canon Denshi Kabushiki Kaisha Light quantity control device
US6064432A (en) * 1992-12-09 2000-05-16 Canon Denshi Kabushiki Kaisha Light quantity control device

Also Published As

Publication number Publication date
FR2440038B1 (en) 1983-10-07

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Legal Events

Date Code Title Description
ST Notification of lapse