GB191022642A - Improvements in Fire Brigade and like Electric Alarms. - Google Patents

Improvements in Fire Brigade and like Electric Alarms.

Info

Publication number
GB191022642A
GB191022642A GB191022642DA GB191022642A GB 191022642 A GB191022642 A GB 191022642A GB 191022642D A GB191022642D A GB 191022642DA GB 191022642 A GB191022642 A GB 191022642A
Authority
GB
United Kingdom
Prior art keywords
circuit
alarm
telephone
fire
annunciator
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
Inventor
James Dunlop Williamson
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
Application granted granted Critical
Publication of GB191022642A publication Critical patent/GB191022642A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B25/12—Manually actuated calamity alarm transmitting arrangements emergency non-personal manually actuated alarm, activators, e.g. details of alarm push buttons mounted on an infrastructure

Abstract

22,642. Williamson, J. D. Sept. 30. Fire-alarm systems.- A fire-alarm pillar-box comprises illuminated compartments b<1>, b<2> with alarm pulls d, a bell h, and telephone apparatus e. The alarm pull may be combined with the telephone receiver as shown in Fig. 6, where the rod l actuates the contact n<1> to complete an alarm circuit through the relay p, the local bell h, and the centralstation annunciator s. The insertion of the plug v breaks the circuit of the annunciator and completes a circuit from ground w<4> over battery w<2>, spring w, telephone instruments v<2>, spring v<3>, telephone instruments u, l<1> at the pillar box, to ground l<3>. This circuit is connected to the telephone main at t. The telephone circuit may otherwise be distinct from the alarm circuit.
GB191022642D 1910-09-30 1910-09-30 Improvements in Fire Brigade and like Electric Alarms. Expired GB191022642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191022642T 1910-09-30

Publications (1)

Publication Number Publication Date
GB191022642A true GB191022642A (en) 1911-06-08

Family

ID=32493581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191022642D Expired GB191022642A (en) 1910-09-30 1910-09-30 Improvements in Fire Brigade and like Electric Alarms.

Country Status (1)

Country Link
GB (1) GB191022642A (en)

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