GB9120462D0 - A location system - Google Patents

A location system

Info

Publication number: GB9120462D0
Authority: GB; United Kingdom
Prior art keywords: location system; location
Prior art date: 1991-09-26
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

GB919120462A

Other versions

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.)

IST Laboratories Ltd

Original Assignee

IST Laboratories Ltd

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.)

1991-09-26

Filing date

1991-09-26

Publication date

1991-11-06

1991-09-26 Application filed by IST Laboratories Ltd filed Critical IST Laboratories Ltd

1991-09-26 Priority to GB9120462A priority Critical patent/GB2261788A/en

1991-11-06 Publication of GB9120462D0 publication Critical patent/GB9120462D0/en

1993-05-26 Publication of GB2261788A publication Critical patent/GB2261788A/en

Status Withdrawn legal-status Critical Current

Classifications

- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/08—Alarms for ensuring the safety of persons responsive to the presence of persons in a body of water, e.g. a swimming pool; responsive to an abnormal condition of a body of water
- G08B21/088—Alarms for ensuring the safety of persons responsive to the presence of persons in a body of water, e.g. a swimming pool; responsive to an abnormal condition of a body of water by monitoring a device worn by the person, e.g. a bracelet attached to the swimmer
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/04—Details
- G01S3/06—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
- H01Q3/242—Circumferential scanning

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Radar, Positioning & Navigation (AREA)
Remote Sensing (AREA)
Business, Economics & Management (AREA)
Emergency Management (AREA)
Radar Systems Or Details Thereof (AREA)
Transmitters (AREA)

GB9120462A 1991-09-26 1991-09-26 A location system Withdrawn GB2261788A (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
GB9120462A GB2261788A (en)	1991-09-26	1991-09-26	A location system

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB9120462A GB2261788A (en)	1991-09-26	1991-09-26	A location system

Publications (2)

Publication Number	Publication Date
GB9120462D0 true GB9120462D0 (en)	1991-11-06
GB2261788A GB2261788A (en)	1993-05-26

Family

ID=10701991

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB9120462A Withdrawn GB2261788A (en)	1991-09-26	1991-09-26	A location system

Country Status (1)

Country	Link
GB (1)	GB2261788A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1995012869A1 (en) *	1993-11-05	1995-05-11	Personal Safety Limited	Warning device
GB2346753A (en) *	1998-10-21	2000-08-16	Rnli	Direction finding aerials
FR2806508A1 (en) *	2000-03-20	2001-09-21	Michel Scicluna	Surveillance system for person near water includes position and humidity detector worn by person, linked to signal transmitter
GB0325622D0 (en)	2003-11-03	2003-12-10	Cambridge Consultants	System for determining positional information
CN105448045B (en) *	2015-03-06	2018-03-20	马科峰	Anti- drowning prevention safety safeguards system based on RFID technique

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB798218A (en) *	1955-11-23	1958-07-16	Marconi Wireless Telegraph Co	Improvements in or relating to radio direction finding systems
US3996592A (en) *	1965-02-04	1976-12-07	Orion Industries, Inc.	Antenna with rotatable sensitivity pattern
NL186344C (en) *	1978-04-18	1990-11-01	Mitsubishi Electric Corp	RADAR BEACONS.
FR2447318A1 (en) *	1979-01-25	1980-08-22	Jaouen Jean Jacques	Portable alarm equipment for solitary navigator - comprises radio which controls beat and allows transmission of distress signal
JPS58148526A (en) *	1982-02-26	1983-09-03	Mitsubishi Electric Corp	Device for rescue signal
DE3600802A1 (en) *	1986-01-14	1987-07-16	Heinrich Prof Dr Ing Reents	Arrangement for monitoring persons or objects which fall overboard from a ship, a floating factory or an operational facility securely anchored at sea
GB8726830D0 (en) *	1987-11-17	1987-12-23	Martin J A	Monitoring system
GB8901344D0 (en) *	1989-01-21	1989-03-15	Beacham Allan	Emergency rescue system

1991
- 1991-09-26 GB GB9120462A patent/GB2261788A/en not_active Withdrawn

Also Published As

Publication number	Publication date
GB2261788A (en)	1993-05-26

Publication	Publication Date	Title
GB2266757B (en)	1996-01-17	A media-conducting unit
GB2252401B (en)	1995-01-25	A heater-humidifier-dehumidifier unit
GB9109476D0 (en)	1991-08-21	A ballistics system
GB2257077B (en)	1994-11-16	A control system
GB9120462D0 (en)	1991-11-06	A location system
GB9205408D0 (en)	1992-04-22	A conveyor system
GB9206276D0 (en)	1992-05-06	A refrigeration system
GB9213594D0 (en)	1992-08-12	A steam-raising system
GB9223167D0 (en)	1992-12-16	Cenveyor system
GB9104139D0 (en)	1991-04-17	A minelaying system
GB2255384B (en)	1994-12-07	A lever system
AU114360S (en)	1992-06-18	A case
ZA92825B (en)	1992-11-25	A joining system
GB2256357B (en)	1995-02-08	A panti-hose
ZA927827B (en)	1994-04-12	Location system
GB9114092D0 (en)	1991-08-14	A control system
GB9126107D0 (en)	1992-02-12	A manipulator system
GB9222139D0 (en)	1992-12-02	A constructional system
GB9119396D0 (en)	1991-10-23	A flushing system
GB9208343D0 (en)	1992-06-03	A feeding system
GB9110208D0 (en)	1991-07-03	A coupling system
AU112993S (en)	1991-12-02	A puzzle - plaything
GB9112032D0 (en)	1991-07-24	A lampbase
AU112992S (en)	1991-12-02	A puzzle - plaything
AU112991S (en)	1991-12-02	A puzzle - plaything

Legal Events

Date	Code	Title	Description
1994-07-20	732E	Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
1996-06-26	WAP	Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)