GB2309109B - A detecting unit and a detecting circuit comprising a plurality of the detecting units - Google Patents

A detecting unit and a detecting circuit comprising a plurality of the detecting units

Info

Publication number
GB2309109B
GB2309109B GB9700318A GB9700318A GB2309109B GB 2309109 B GB2309109 B GB 2309109B GB 9700318 A GB9700318 A GB 9700318A GB 9700318 A GB9700318 A GB 9700318A GB 2309109 B GB2309109 B GB 2309109B
Authority
GB
United Kingdom
Prior art keywords
detecting
units
circuit
unit
detecting unit
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
GB9700318A
Other versions
GB9700318D0 (en
GB2309109A (en
Inventor
William Alexander Heffron
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9700318D0 publication Critical patent/GB9700318D0/en
Publication of GB2309109A publication Critical patent/GB2309109A/en
Application granted granted Critical
Publication of GB2309109B publication Critical patent/GB2309109B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Emergency Alarm Devices (AREA)
GB9700318A 1996-01-10 1997-01-09 A detecting unit and a detecting circuit comprising a plurality of the detecting units Expired - Fee Related GB2309109B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE960012 1996-01-10

Publications (3)

Publication Number Publication Date
GB9700318D0 GB9700318D0 (en) 1997-02-26
GB2309109A GB2309109A (en) 1997-07-16
GB2309109B true GB2309109B (en) 1999-08-04

Family

ID=11041026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9700318A Expired - Fee Related GB2309109B (en) 1996-01-10 1997-01-09 A detecting unit and a detecting circuit comprising a plurality of the detecting units

Country Status (2)

Country Link
GB (1) GB2309109B (en)
IE (2) IES73218B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60316169T2 (en) * 2002-10-04 2008-05-29 Ovchinnikov, Valery Vasilievich METHOD FOR FORMING AND SENDING SIGNALS
GB201103444D0 (en) * 2011-03-01 2011-04-13 Coopers Fire Ltd
CN110411892B (en) * 2019-09-04 2024-07-23 上海乐研电气有限公司 Contact signal acquisition circuit for on-site on-line checking gas density relay

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588892A (en) * 1967-12-29 1971-06-28 Cerberus Ag Test of parallel alarm units
GB1270682A (en) * 1968-04-29 1972-04-12 American District Telegraph Co Improvements in or relating to intruder alarm systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588892A (en) * 1967-12-29 1971-06-28 Cerberus Ag Test of parallel alarm units
GB1270682A (en) * 1968-04-29 1972-04-12 American District Telegraph Co Improvements in or relating to intruder alarm systems

Also Published As

Publication number Publication date
IE970008A1 (en) 1997-07-16
IES73218B2 (en) 1997-05-07
GB9700318D0 (en) 1997-02-26
GB2309109A (en) 1997-07-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050109