FR2448754A2 - Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval - Google Patents

Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval

Info

Publication number
FR2448754A2
FR2448754A2 FR7903554A FR7903554A FR2448754A2 FR 2448754 A2 FR2448754 A2 FR 2448754A2 FR 7903554 A FR7903554 A FR 7903554A FR 7903554 A FR7903554 A FR 7903554A FR 2448754 A2 FR2448754 A2 FR 2448754A2
Authority
FR
France
Prior art keywords
resetting
alarm
automatic
integrated circuits
integrated circuit
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
FR7903554A
Other languages
French (fr)
Other versions
FR2448754B2 (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 FR7903554A priority Critical patent/FR2448754A2/en
Publication of FR2448754A2 publication Critical patent/FR2448754A2/en
Application granted granted Critical
Publication of FR2448754B2 publication Critical patent/FR2448754B2/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/008—Alarm setting and unsetting, i.e. arming or disarming of the security system
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The alarm circuit includes a wheatstone bridge whose imbalance causes locking of an integrated circuit (IC4), which in turn lights an LED indicator and operates the alarm via a relay. Unlocking may be carried out manually by operating the pushbutton switch (S1). The integrated circuit may alternatively be automatically reset, the automatic or manual mode being selected by the switch (S2). Resetting may only be carried out if the output (3) of the integrated circuit (IC5) is positive. The automatic resetting time is adjustable by varying the values of the resistance, R, (10 kiloohms to 10 megaohms) and the capacitance C, (4.7 to 15 microfarads). Two further integrated circuits (IC 6 & 7) control this operation. A further modification of the circuit enables certain alarm detectors to be temporarily disarmed, whilst the alarm is being set up-for example as the operator crosses a room.
FR7903554A 1979-02-06 1979-02-06 Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval Granted FR2448754A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7903554A FR2448754A2 (en) 1979-02-06 1979-02-06 Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7903554A FR2448754A2 (en) 1979-02-06 1979-02-06 Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval

Publications (2)

Publication Number Publication Date
FR2448754A2 true FR2448754A2 (en) 1980-09-05
FR2448754B2 FR2448754B2 (en) 1983-03-11

Family

ID=9221876

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7903554A Granted FR2448754A2 (en) 1979-02-06 1979-02-06 Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval

Country Status (1)

Country Link
FR (1) FR2448754A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984001456A1 (en) * 1982-10-06 1984-04-12 Jean Faget Self-controlled and self protected alarm device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984001456A1 (en) * 1982-10-06 1984-04-12 Jean Faget Self-controlled and self protected alarm device
FR2534396A1 (en) * 1982-10-06 1984-04-13 Faget Jean SELF-CONTROLLED AND SELF-PROTECTED ALARM DEVICE

Also Published As

Publication number Publication date
FR2448754B2 (en) 1983-03-11

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