GB430459A - Improvements in or relating to sound actuated warning devices - Google Patents

Improvements in or relating to sound actuated warning devices

Info

Publication number
GB430459A
GB430459A GB22211/34A GB2221134A GB430459A GB 430459 A GB430459 A GB 430459A GB 22211/34 A GB22211/34 A GB 22211/34A GB 2221134 A GB2221134 A GB 2221134A GB 430459 A GB430459 A GB 430459A
Authority
GB
United Kingdom
Prior art keywords
coil
relay
contacts
lever
relating
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
GB22211/34A
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.)
COUESNON SA
Original Assignee
COUESNON SA
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 COUESNON SA filed Critical COUESNON SA
Publication of GB430459A publication Critical patent/GB430459A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Emergency Alarm Devices (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

430,459. Electromagnetic switches. SOC. ANON. COUESNON, 94, Rue d'Angouleme, Paris. July 30, 1934, No. 22211. Convention date, Sept. 15, 1933. [Class 38 (v)] [See also Group XXXVIII] A moving coil relay has its coil suspended by a lever system which is adjusted so that contacts, actuated by the lever mechanism, are closed only after a predetermined delay. The field winding 11 is normally energized as is the moving coil 13 which is suspended by the lever system 14, 15. When current in the coil is reduced, the coil moves out of the gap. The relay is made sluggish so that an appreciable portion of a second elapses before the wipers 18, carried by the lever arms 15, bridge contacts e, f. The coil is counterbalanced by weights 17. In an alternative arrangement the relay is normally de-energized, the contacts e, f being arranged at the upper end of segments 19.
GB22211/34A 1933-09-15 1934-07-30 Improvements in or relating to sound actuated warning devices Expired GB430459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR430459X 1933-09-15

Publications (1)

Publication Number Publication Date
GB430459A true GB430459A (en) 1935-06-19

Family

ID=8899284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22211/34A Expired GB430459A (en) 1933-09-15 1934-07-30 Improvements in or relating to sound actuated warning devices

Country Status (1)

Country Link
GB (1) GB430459A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545218A (en) * 1947-09-16 1951-03-13 Frank P Weber Discriminating acoustic signal detector
US2578347A (en) * 1944-04-04 1951-12-11 Gagnaire Francois Signal transmitting device for vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578347A (en) * 1944-04-04 1951-12-11 Gagnaire Francois Signal transmitting device for vehicles
US2545218A (en) * 1947-09-16 1951-03-13 Frank P Weber Discriminating acoustic signal detector

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