GB852193A - Improvements in or relating to burglar alarm systems - Google Patents

Improvements in or relating to burglar alarm systems

Info

Publication number
GB852193A
GB852193A GB390158A GB390158A GB852193A GB 852193 A GB852193 A GB 852193A GB 390158 A GB390158 A GB 390158A GB 390158 A GB390158 A GB 390158A GB 852193 A GB852193 A GB 852193A
Authority
GB
United Kingdom
Prior art keywords
circuit
contact
relay
closes
delay
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
GB390158A
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
Priority to GB390158A priority Critical patent/GB852193A/en
Publication of GB852193A publication Critical patent/GB852193A/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
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

852,193. Electric burglar alarm systems. LANDER, A. June 8, 1959 [March 6, 1958], No. 3901/58. Class 118 (1). A burglar alarm system associated with a telephone circuit apparatus, incorporating a time delay device in the alarm bell circuit, includes a relay having two windings, one in a telephone circuit, and two sets of contacts, one of which by-passes the delay device when the relay is energized. In the embodiment shown, an incoming telephone call over lines 4 energizes relay winding X, completing the circuit to winding Y via contact X1. Contact Y1 closes, by-passing the delay device TDD, and contact Y2 closes, completing a circuit to the thermal delay THH. After the delay determined by THH, contact THC opens, and if during this time the incoming call has ceased, the circuit restores to normal. The alarm is initiated by a burglar causing a relay (not shown) to operate closing contacts C2 and G1. This completes the circuit to relay B either through delay circuit TDD or through contact Y1, depending on whether an incoming call is being received or not. Operation of B closes contact B2 to energize alarm bell 7, and also closes self-hold contact B1.
GB390158A 1958-03-06 1958-03-06 Improvements in or relating to burglar alarm systems Expired GB852193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB390158A GB852193A (en) 1958-03-06 1958-03-06 Improvements in or relating to burglar alarm systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB390158A GB852193A (en) 1958-03-06 1958-03-06 Improvements in or relating to burglar alarm systems

Publications (1)

Publication Number Publication Date
GB852193A true GB852193A (en) 1960-10-26

Family

ID=9766998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB390158A Expired GB852193A (en) 1958-03-06 1958-03-06 Improvements in or relating to burglar alarm systems

Country Status (1)

Country Link
GB (1) GB852193A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107601203A (en) * 2017-10-23 2018-01-19 金川集团股份有限公司 A kind of list rope cage catching device action detection device and detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107601203A (en) * 2017-10-23 2018-01-19 金川集团股份有限公司 A kind of list rope cage catching device action detection device and detection method

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