GB1409873A - Alarm signals - Google Patents

Alarm signals

Info

Publication number
GB1409873A
GB1409873A GB4354971A GB4354971A GB1409873A GB 1409873 A GB1409873 A GB 1409873A GB 4354971 A GB4354971 A GB 4354971A GB 4354971 A GB4354971 A GB 4354971A GB 1409873 A GB1409873 A GB 1409873A
Authority
GB
United Kingdom
Prior art keywords
signal
network
dwelling
call signal
warden
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
Application number
GB4354971A
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.)
Belling and Lee Ltd
Original Assignee
Belling and Lee 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.)
Filing date
Publication date
Application filed by Belling and Lee Ltd filed Critical Belling and Lee Ltd
Priority to GB4354971A priority Critical patent/GB1409873A/en
Publication of GB1409873A publication Critical patent/GB1409873A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/027—Annunciator systems for hospitals
    • 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
    • G08B25/08—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 communication transmission lines

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Selective Calling Equipment (AREA)

Abstract

1409873 Electric selective signalling BELLING & LEE Ltd 15 Sept 1972 [17 Sept 1971] 43549/71 Heading G4H A system for establishing communication between a monitor station 7, Fig. 3 and any of a plurality of calling stations 5, Fig. 2 connected to a common signal network, comprises, at each station 5, means responsive to a manually operable switch for generating and infecting into the network a unique identifying radiofrequency call signal and, at station 7, means 20-22 responsive to the call signal to identify it and provide an alarm signal. As described the network is an entertainment network connected to old people's dwellings 5. Oscillator 11 is caused to apply a unique frequency to the network when a button or switch 5a is actuated during an emergency; additionally the call signal may be generated automatically in response to, e.g. temperature conditions in the dwelling. Also the call signal may be coded. Upon receipt of the call signal, receiver 20 in a warden's flat 7 causes a bell 8 to ring and may also operate a visual alarm 22b, the receiver also incorporating means for establishing the identity of the dwelling 5 sending the signal. The warden then energizes speech circuits 13- 14, 5b in that dwelling by transmitting a unique signal thereto using a dial 23 to pulse the output from a transceiver 24. Verbal communication can now take place over a RF link including microphone/loudspeaker units 5b, 25. A pressto-speak key 27 is included at the warden's flat, and the apparatus may be designed so that only actuation thereof will suppress the audible alarm until the alarm switch in dwelling 5 has been reset.
GB4354971A 1971-09-17 1971-09-17 Alarm signals Expired GB1409873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4354971A GB1409873A (en) 1971-09-17 1971-09-17 Alarm signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4354971A GB1409873A (en) 1971-09-17 1971-09-17 Alarm signals

Publications (1)

Publication Number Publication Date
GB1409873A true GB1409873A (en) 1975-10-15

Family

ID=10429256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4354971A Expired GB1409873A (en) 1971-09-17 1971-09-17 Alarm signals

Country Status (1)

Country Link
GB (1) GB1409873A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551280A1 (en) * 1983-08-25 1985-03-01 Gotanda Motohiro BUILDING MONITORING DEVICE
GB2202352A (en) * 1987-03-20 1988-09-21 Kei Mori A fire alarm system
DK155266B (en) * 1980-02-04 1989-03-13 Ant Nachrichtentech EMERGENCY CALL SYSTEM
GB2231429A (en) * 1989-05-09 1990-11-14 Target Ind Limited Monitoring systems

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK155266B (en) * 1980-02-04 1989-03-13 Ant Nachrichtentech EMERGENCY CALL SYSTEM
FR2551280A1 (en) * 1983-08-25 1985-03-01 Gotanda Motohiro BUILDING MONITORING DEVICE
GB2202352A (en) * 1987-03-20 1988-09-21 Kei Mori A fire alarm system
GB2231429A (en) * 1989-05-09 1990-11-14 Target Ind Limited Monitoring systems

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees