CA1279899C - Security system with saw transmitter - Google Patents

Security system with saw transmitter

Info

Publication number
CA1279899C
CA1279899C CA000509063A CA509063A CA1279899C CA 1279899 C CA1279899 C CA 1279899C CA 000509063 A CA000509063 A CA 000509063A CA 509063 A CA509063 A CA 509063A CA 1279899 C CA1279899 C CA 1279899C
Authority
CA
Canada
Prior art keywords
signal
security system
frequency
circuit
condition
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 - Fee Related
Application number
CA000509063A
Other languages
English (en)
French (fr)
Inventor
Ronald J. Coash
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.)
Notifier Co
Original Assignee
Notifier Co
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 Notifier Co filed Critical Notifier Co
Application granted granted Critical
Publication of CA1279899C publication Critical patent/CA1279899C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits
    • 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
    • G08B25/10—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 using wireless transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Alarm Systems (AREA)
CA000509063A 1985-08-13 1986-05-13 Security system with saw transmitter Expired - Fee Related CA1279899C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76528085A 1985-08-13 1985-08-13
US06/765,280 1985-08-13

Publications (1)

Publication Number Publication Date
CA1279899C true CA1279899C (en) 1991-02-05

Family

ID=25073112

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000509063A Expired - Fee Related CA1279899C (en) 1985-08-13 1986-05-13 Security system with saw transmitter

Country Status (4)

Country Link
JP (1) JPS6285399A (de)
CA (1) CA1279899C (de)
DE (1) DE3627226A1 (de)
GB (1) GB2179480A (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706680A1 (de) * 1987-03-02 1988-09-15 Siemens Ag Verfahren und einrichtung zur ueberwachung von strommasten gegen absichtliche beschaedigung
JP2925158B2 (ja) * 1988-07-29 1999-07-28 株式会社東芝 変調器および送信器
GB2268013B (en) * 1992-06-13 1995-10-25 Motorola Gmbh Binary modulator
US5367537A (en) * 1993-05-24 1994-11-22 Delco Electronics Corp. Saw-based FSK modulating circuit
FR2708774A1 (fr) * 1993-08-05 1995-02-10 Guillo Jean Dispositif de sécurité à liaison radio bi-directionnelle.
DE19539939B4 (de) * 1995-10-26 2004-09-09 Siemens Ag Codesender, insbesondere für ein Diebstahlschutzsystem eines Kraftfahrzeugs
DE19634622B4 (de) * 1996-08-27 2005-05-12 Epcos Ag In seiner Resonanzfrequenz abstimmbarer Butler-Oszillator
DE19929193A1 (de) * 1999-06-27 2000-12-28 Geze Gmbh Flucht- und Rettungswegeinrichtung für mindestens eine Tür oder ein Fenster in Flucht- und Rettungswegen
CA2704039C (en) * 2001-03-30 2013-11-12 M&Fc Holding, Llc Enhanced wireless packet data communication system, method, and apparatus applicable to both wide area networks and local area networks
US6933898B2 (en) 2002-03-01 2005-08-23 Lear Corporation Antenna for tire pressure monitoring wheel electronic device
US6829924B2 (en) 2002-03-01 2004-12-14 Lear Corporation Tire pressure monitoring system with low frequency initiation approach
US6788193B2 (en) 2002-03-01 2004-09-07 Lear Corporation System and method for tire pressure monitoring providing automatic tire location recognition
US20030164034A1 (en) * 2002-03-01 2003-09-04 Lear Corporation System and method for using a saw based RF transmitter for FM transmission in a TPM
EP1669960A1 (de) * 2004-12-08 2006-06-14 Siemens Schweiz AG Melder mit Kommunikationsantenne
DE202014001544U1 (de) 2013-07-23 2014-07-16 Obschestvo S Ogranichennoi Otvetstvennostyu "Globallab" System zum Monitoring von Lebenstätigkeitsparametern mit einer Funktion des Zugriffs Dritter auf die Monitoringergebnisse

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1466357B1 (de) * 1965-07-27 1973-02-15 Siemens Ag In der Frequenz modulierbarer freischwingender Oszillator,insbesondere Transistoroszillator
GB1358567A (en) * 1970-07-21 1974-07-03 Marconi Co Ltd Surface elastic wave oscillators
US3868595A (en) * 1972-10-30 1975-02-25 Texas Instruments Inc Rf oscillator frequency control utilizing surface wave delay lines
US3990021A (en) * 1973-04-02 1976-11-02 Texas Instruments Incorporated Surface wave multifrequency oscillator
FR2231062B1 (de) * 1973-05-22 1977-11-10 Tacussel Maurice
GB1451664A (en) * 1973-06-06 1976-10-06 Nat Res Dev Surface acoustic wave oscillators
US3979697A (en) * 1975-11-03 1976-09-07 International Telephone And Telegraph Corporation Frequency modulated saw oscillator
FR2367377A1 (fr) * 1976-10-07 1978-05-05 Brossard Pierre Modulateurs de frequence pour systemes de transmission a faisceaux hertziens
FR2420174A1 (fr) * 1978-03-15 1979-10-12 Dassault Electronique Installation pour la protection des personnes et des biens dans une agglomeration urbaine
DE3305453A1 (de) * 1983-02-17 1984-08-23 Siemens AG, 1000 Berlin und 8000 München Spannungsgesteuerter oszillator
DE8420985U1 (de) * 1984-07-13 1985-01-31 Kanne, Friedrich, 4902 Bad Salzuflen Minisenderantenne in papier oder stoff

Also Published As

Publication number Publication date
GB8619283D0 (en) 1986-09-17
DE3627226A1 (de) 1987-02-26
JPS6285399A (ja) 1987-04-18
GB2179480A (en) 1987-03-04

Similar Documents

Publication Publication Date Title
US4684853A (en) Garage door opener using transmitter with SAW oscillator modulator
CA1279899C (en) Security system with saw transmitter
US4327444A (en) Miniature transmitter and method for making same
US6130612A (en) Antenna for RF tag with a magnetoelastic resonant core
US4794622A (en) Low power transmitter frequency stabilization
EP0519145B1 (de) Elektrischer abgestimmter RF-Empfänger, Gerät und Verfahren dafür
US5568157A (en) Dual purpose, low profile antenna
US6021951A (en) Wireless IC card and IC card reader communication system
GB2172708A (en) Wireless transmission of measuring signals, eg. tyre pressures }or temperatures}
US5563617A (en) Doppler microwave sensor
DE3277006D1 (en) Condition monitoring system (tyre pressure)
US4864636A (en) Crystal controlled transmitter
US5945958A (en) Loop antenna
US3094663A (en) Microwave signal checker for continuous wave radiations
EP1271763B1 (de) Hochfrequenzvorrichtung
US5257033A (en) Transmitter with a reduction of power of signals transmitted at harmonics
US5216434A (en) Diversity receiving apparatus
US5652595A (en) Patch antenna including reactive loading
JP2005073113A (ja) 非接触型ｉｃカード
US3996555A (en) Identification of vehicles
US5223801A (en) Crystal oscillator and transmitter operating at the third harmonic of the fifth overtone of a crystal
EP0648009B1 (de) Oszillatorschaltung
JP2001267950A (ja) 自動同調アンテナシステム
US5471196A (en) Security system for surveilling the passage of commodities through defined zones
US4827275A (en) Noise rejection antenna system for nonmetallic marine vessels

Legal Events

Date Code Title Description
MKLA Lapsed