IT1002221B - SWITCHING DEVICE FOR ACOUSTIC SIGNALING DEVICES - Google Patents
SWITCHING DEVICE FOR ACOUSTIC SIGNALING DEVICESInfo
- Publication number
- IT1002221B IT1002221B IT3206673A IT3206673A IT1002221B IT 1002221 B IT1002221 B IT 1002221B IT 3206673 A IT3206673 A IT 3206673A IT 3206673 A IT3206673 A IT 3206673A IT 1002221 B IT1002221 B IT 1002221B
- Authority
- IT
- Italy
- Prior art keywords
- switching device
- signaling devices
- acoustic signaling
- acoustic
- devices
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
- Fire Alarms (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722261110 DE2261110C3 (en) | 1972-12-14 | 1972-12-14 | Switching device for acoustic signaling devices |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1002221B true IT1002221B (en) | 1976-05-20 |
Family
ID=5864365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT3206673A IT1002221B (en) | 1972-12-14 | 1973-12-10 | SWITCHING DEVICE FOR ACOUSTIC SIGNALING DEVICES |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2261110C3 (en) |
FR (1) | FR2211159A5 (en) |
GB (1) | GB1448127A (en) |
IT (1) | IT1002221B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2631758C3 (en) * | 1976-07-15 | 1982-09-30 | Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt | Tone sequence switching device for vehicles with right of way |
SE419280B (en) * | 1979-11-30 | 1981-07-20 | Medicinsk Teknisk Konsultation | FREQUENCY ADJUSTED SIGNAL DEVICE FOR HEARING DAMAGE |
-
1972
- 1972-12-14 DE DE19722261110 patent/DE2261110C3/en not_active Expired
-
1973
- 1973-12-07 GB GB5675973A patent/GB1448127A/en not_active Expired
- 1973-12-10 IT IT3206673A patent/IT1002221B/en active
- 1973-12-10 FR FR7344039A patent/FR2211159A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2261110B2 (en) | 1977-12-08 |
DE2261110C3 (en) | 1978-07-27 |
DE2261110A1 (en) | 1974-06-20 |
FR2211159A5 (en) | 1974-07-12 |
GB1448127A (en) | 1976-09-02 |
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