Seikosha Outdoor Warning Sirens from Japan

[500AT]

Here is the Web site for Seikosha [Seiko] Manufacturing Company, which specializes in electromechanical outdoor warning sirens in Japan.

http://www.seikosha-mfg.co.jp/sir/sirin.html

[500AT]

An actual installation in Saitama Prefecture 100 km from Tokyo:



This siren is also used to warn of water release from a dam on a river.

放流サイレン （ゲートから放流を開始する時にサイレンを鳴らします）
放流開始の１０分前にサイレンを鳴らします。

大洞ダム放流サイレン吹鳴方式
５０秒 １０秒 ５０秒 １０秒 ５０秒
吹鳴 休止 吹鳴 休止 吹鳴
約３分間

Siren will sound for 50 seconds, then 10, then 50 again, then 10, and finally 50 seconds.

[mgear]

Those are some weird sirens especially the spg-2 does it rotate. On that website every thing is question marks and squares I guess my computer doesn't know Japanese.

[500AT]

You can feed each page into this translation machine:

http://babelfish.altavista.com/

Select Japanese to English, and you should be able to read it.

[AllSafe]

The SPG-2, SPJ and BVG-2 models are all bidirectional, with an upper horn which can be rotated manually to point the sound in a specific direction. The SPJ, SPH and SQD models are unique that they have an inverter drive which allows the siren to be powered from between 100-200V, 50-60Hz, single- or three-phase. They have a special 100Hz 3-phase motor in them.

[Daniel]

Thanks! These are very interesting designs. It looks as if many of them are dual-tone, minor third.

[mgear]

They look great and exotic.