BE861926A - Circuit electrique pour la commande d'alarmes sonores - Google Patents
Circuit electrique pour la commande d'alarmes sonoresInfo
- Publication number
- BE861926A BE861926A BE183515A BE183515A BE861926A BE 861926 A BE861926 A BE 861926A BE 183515 A BE183515 A BE 183515A BE 183515 A BE183515 A BE 183515A BE 861926 A BE861926 A BE 861926A
- Authority
- BE
- Belgium
- Prior art keywords
- electrical circuit
- audible alarms
- alarms control
- control
- audible
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
- H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
- H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
- H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
- H03K3/288—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable using additional transistors in the input circuit
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
-
- 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
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
- H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
- H03K17/662—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Fire-Detection Mechanisms (AREA)
- Alarm Systems (AREA)
- Fire Alarms (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/751,882 US4079271A (en) | 1976-12-17 | 1976-12-17 | Alarm driver for a smoke detector |
Publications (1)
Publication Number | Publication Date |
---|---|
BE861926A true BE861926A (fr) | 1978-04-14 |
Family
ID=25023912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE183515A BE861926A (fr) | 1976-12-17 | 1977-12-16 | Circuit electrique pour la commande d'alarmes sonores |
Country Status (9)
Country | Link |
---|---|
US (1) | US4079271A (xx) |
JP (1) | JPS5394800A (xx) |
AU (1) | AU504991B2 (xx) |
BE (1) | BE861926A (xx) |
CA (1) | CA1096450A (xx) |
DE (1) | DE2755670A1 (xx) |
FR (1) | FR2374706A1 (xx) |
GB (1) | GB1587740A (xx) |
NL (1) | NL7714016A (xx) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4496849A (en) * | 1982-02-22 | 1985-01-29 | General Motors Corporation | Power transistor protection from substrate injection |
US4511809A (en) * | 1983-01-27 | 1985-04-16 | Motorola, Inc. | Switch circuit having improved switching characteristics |
US5077756A (en) * | 1990-05-31 | 1991-12-31 | Acculan Ltd. | Data network line driver |
ES2090788T3 (es) * | 1992-07-07 | 1996-10-16 | Siemens Ag | Circuito excitador integrable para una carga reactiva. |
US5990797A (en) * | 1997-03-04 | 1999-11-23 | Bkk Brands, Inc. | Ultraloud smoke detector |
US6509838B1 (en) * | 2000-02-08 | 2003-01-21 | Peter P. Payne | Constant current flame ionization circuit |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1200362B (de) * | 1960-09-03 | 1965-09-09 | Telefunken Patent | Schaltungsanordnung zur Auswahl eines Verbrauchers |
US3237125A (en) * | 1962-11-14 | 1966-02-22 | Honeywell Inc | Frequency stabilized saturable core oscillator |
US3473051A (en) * | 1966-02-08 | 1969-10-14 | Sylvania Electric Prod | Bistable logic circuit |
US3538353A (en) * | 1967-10-13 | 1970-11-03 | Gen Electric | Switching circuit |
US3569745A (en) * | 1968-11-06 | 1971-03-09 | Sylvania Electric Prod | Transistor logic circuit |
US3684983A (en) * | 1970-06-19 | 1972-08-15 | E & M Lab | High speed circulator switch |
US3770986A (en) * | 1972-04-20 | 1973-11-06 | Hewlett Packard Co | Switching circuit for inductive loads |
-
1976
- 1976-12-17 US US05/751,882 patent/US4079271A/en not_active Expired - Lifetime
-
1977
- 1977-11-25 AU AU30984/77A patent/AU504991B2/en not_active Expired
- 1977-11-25 CA CA291,813A patent/CA1096450A/en not_active Expired
- 1977-12-14 DE DE19772755670 patent/DE2755670A1/de not_active Withdrawn
- 1977-12-15 FR FR7737803A patent/FR2374706A1/fr active Pending
- 1977-12-16 GB GB52584/77A patent/GB1587740A/en not_active Expired
- 1977-12-16 NL NL7714016A patent/NL7714016A/xx not_active Application Discontinuation
- 1977-12-16 JP JP15069577A patent/JPS5394800A/ja active Pending
- 1977-12-16 BE BE183515A patent/BE861926A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
JPS5394800A (en) | 1978-08-19 |
NL7714016A (nl) | 1978-06-20 |
FR2374706A1 (fr) | 1978-07-13 |
US4079271A (en) | 1978-03-14 |
AU3098477A (en) | 1979-05-31 |
CA1096450A (en) | 1981-02-24 |
GB1587740A (en) | 1981-04-08 |
AU504991B2 (en) | 1979-11-01 |
DE2755670A1 (de) | 1978-06-22 |
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