CH540539A - Fire alarm system - Google Patents
Fire alarm systemInfo
- Publication number
- CH540539A CH540539A CH1620671A CH1620671A CH540539A CH 540539 A CH540539 A CH 540539A CH 1620671 A CH1620671 A CH 1620671A CH 1620671 A CH1620671 A CH 1620671A CH 540539 A CH540539 A CH 540539A
- Authority
- CH
- Switzerland
- Prior art keywords
- alarm system
- fire alarm
- fire
- alarm
- Prior art date
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
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7015288A SE402660B (en) | 1970-11-12 | 1970-11-12 | FIREPLACE FACILITY |
Publications (1)
Publication Number | Publication Date |
---|---|
CH540539A true CH540539A (en) | 1973-08-15 |
Family
ID=20300437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1620671A CH540539A (en) | 1970-11-12 | 1971-11-08 | Fire alarm system |
Country Status (10)
Country | Link |
---|---|
US (1) | US3832678A (en) |
BE (1) | BE775169A (en) |
CH (1) | CH540539A (en) |
DE (1) | DE2154537A1 (en) |
DK (1) | DK129069B (en) |
FI (1) | FI53762C (en) |
GB (1) | GB1338690A (en) |
NL (1) | NL7115165A (en) |
NO (1) | NO131693C (en) |
SE (1) | SE402660B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3028395A1 (en) * | 1979-07-27 | 1981-02-12 | Hochiki Co | FIRE DETECTOR AND FIRE ALARM SYSTEM FOR ITS USE |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3991413A (en) * | 1975-06-23 | 1976-11-09 | Berger Philip H | Constant current detector system |
DE2638068C3 (en) * | 1976-08-24 | 1986-11-13 | Siemens AG, 1000 Berlin und 8000 München | Fire alarm system with several detectors that can be operated via a message loop |
DE2641489C2 (en) * | 1976-09-15 | 1984-05-30 | Siemens AG, 1000 Berlin und 8000 München | Method for the transmission of measured values in a fire alarm system |
US4110683A (en) * | 1977-07-08 | 1978-08-29 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus including a plurality of spaced transformers for locating short circuits in cables |
US4287515A (en) * | 1979-04-27 | 1981-09-01 | Baker Industries, Inc. | Fire detection system with multiple output signals |
DE2935335C2 (en) * | 1979-08-31 | 1985-08-08 | Siemens AG, 1000 Berlin und 8000 München | DC alarm system |
DE3043357C2 (en) * | 1980-11-17 | 1985-01-17 | Siemens AG, 1000 Berlin und 8000 München | Method and device for measuring resistance on a signal line |
DK346982A (en) * | 1981-02-06 | 1983-02-07 | Inst For Ind Res & Standards | METHOD AND APPARATUS FOR IDENTIFYING THE LOCATION OF A STATE CHANGE IN A PART OF AN ELECTRIC CIRCUIT |
JPS58134392A (en) * | 1982-02-04 | 1983-08-10 | ニツタン株式会社 | Fire alarm |
ATE60682T1 (en) * | 1985-11-26 | 1991-02-15 | Siemens Ag | EMERGENCY ALERT SYSTEM. |
DE3719988A1 (en) * | 1987-06-15 | 1988-12-29 | Total Feuerschutz Gmbh | INDIVIDUAL IDENTIFICATION |
WO1999053627A1 (en) | 1998-04-10 | 1999-10-21 | Chrimar Systems, Inc. Doing Business As Cms Technologies | System for communicating with electronic equipment on a network |
US9252769B2 (en) | 2011-10-07 | 2016-02-02 | Microchip Technology Incorporated | Microcontroller with optimized ADC controller |
US9437093B2 (en) * | 2011-10-06 | 2016-09-06 | Microchip Technology Incorporated | Differential current measurements to determine ION current in the presence of leakage current |
US9467141B2 (en) | 2011-10-07 | 2016-10-11 | Microchip Technology Incorporated | Measuring capacitance of a capacitive sensor with a microcontroller having an analog output for driving a guard ring |
US8847802B2 (en) | 2011-10-06 | 2014-09-30 | Microchip Technology Incorporated | Microcontroller ADC with a variable sample and hold capacitor |
US9071264B2 (en) | 2011-10-06 | 2015-06-30 | Microchip Technology Incorporated | Microcontroller with sequencer driven analog-to-digital converter |
US9257980B2 (en) | 2011-10-06 | 2016-02-09 | Microchip Technology Incorporated | Measuring capacitance of a capacitive sensor with a microcontroller having digital outputs for driving a guard ring |
US9176088B2 (en) | 2011-12-14 | 2015-11-03 | Microchip Technology Incorporated | Method and apparatus for detecting smoke in an ion chamber |
US9189940B2 (en) | 2011-12-14 | 2015-11-17 | Microchip Technology Incorporated | Method and apparatus for detecting smoke in an ion chamber |
US9207209B2 (en) | 2011-12-14 | 2015-12-08 | Microchip Technology Incorporated | Method and apparatus for detecting smoke in an ion chamber |
US9823280B2 (en) | 2011-12-21 | 2017-11-21 | Microchip Technology Incorporated | Current sensing with internal ADC capacitor |
US8884771B2 (en) | 2012-08-01 | 2014-11-11 | Microchip Technology Incorporated | Smoke detection using change in permittivity of capacitor air dielectric |
CA3006178C (en) | 2018-05-25 | 2021-02-02 | Stephen D. Ainsworth | Fire alarm testing device and method |
US10210747B1 (en) * | 2018-05-25 | 2019-02-19 | Stephen David Ainsworth | Fire alarm testing device and method |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3268881A (en) * | 1963-08-01 | 1966-08-23 | Alfred W Vasel | Detection device |
CH468682A (en) * | 1967-06-26 | 1969-02-15 | Cerberus Ag | Fire alarm system |
GB1178957A (en) * | 1968-04-29 | 1970-01-28 | Goodwin Alfred George Ive | Improvements in and relating to Electrical Protective Systems |
US3611362A (en) * | 1969-03-19 | 1971-10-05 | Gen Signal Of Canada Ltd | Alarm sensing and indicating systems |
US3653025A (en) * | 1969-08-04 | 1972-03-28 | Caswell Equipment Co Inc | Signalling system |
US3676877A (en) * | 1970-04-18 | 1972-07-11 | Mittan Co Ltd | Fire alarm system with fire zone locator using zener diode voltage monitoring |
US3716834A (en) * | 1971-10-07 | 1973-02-13 | H Adams | Data transmission system with immunity to circuit faults |
US3711854A (en) * | 1971-10-19 | 1973-01-16 | Federal Sign And Signal Corp | Parallel alarm circuit having series supervision |
-
1970
- 1970-11-12 SE SE7015288A patent/SE402660B/en unknown
-
1971
- 1971-11-03 NL NL7115165A patent/NL7115165A/xx not_active Application Discontinuation
- 1971-11-03 DE DE19712154537 patent/DE2154537A1/en not_active Withdrawn
- 1971-11-05 US US00196045A patent/US3832678A/en not_active Expired - Lifetime
- 1971-11-08 CH CH1620671A patent/CH540539A/en not_active IP Right Cessation
- 1971-11-08 GB GB5173171A patent/GB1338690A/en not_active Expired
- 1971-11-10 FI FI3212/71A patent/FI53762C/en active
- 1971-11-10 NO NO4153/71A patent/NO131693C/no unknown
- 1971-11-10 BE BE775169A patent/BE775169A/en unknown
- 1971-11-11 DK DK551671AA patent/DK129069B/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3028395A1 (en) * | 1979-07-27 | 1981-02-12 | Hochiki Co | FIRE DETECTOR AND FIRE ALARM SYSTEM FOR ITS USE |
Also Published As
Publication number | Publication date |
---|---|
NL7115165A (en) | 1972-05-16 |
FI53762B (en) | 1978-03-31 |
NO131693C (en) | 1975-07-09 |
BE775169A (en) | 1972-03-01 |
US3832678A (en) | 1974-08-27 |
SE402660B (en) | 1978-07-10 |
GB1338690A (en) | 1973-11-28 |
DE2154537A1 (en) | 1972-05-18 |
DK129069B (en) | 1974-08-12 |
FI53762C (en) | 1978-07-10 |
NO131693B (en) | 1975-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |