GB430459A - Improvements in or relating to sound actuated warning devices - Google Patents
Improvements in or relating to sound actuated warning devicesInfo
- 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
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.
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)
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 |
-
1934
- 1934-07-30 GB GB22211/34A patent/GB430459A/en not_active Expired
Cited By (2)
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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