The Siren Board

It's a Toshiba blower-fed siren. Single-tone, 120dbC. They are the only ones known to exist in the US. The power plant and the sirens were both installed by Toshiba.

I have seen the patent drawings on these, but still fail to see how they are blower driven.

douro20 wrote:It's a Toshiba blower-fed siren. Single-tone, 120dbC. They are the only ones known to exist in the US. The power plant and the sirens were both installed by Toshiba.

Toshiba! Originally known as The Shibura Brothers Radio Assembly Company of Tokyo.... Name didn't fit too well on the front of a pocket radio or TV set, so they came up with the contracted name "TOSHIBA" for Tokyo Shibura Assembly. I can't back that in writing, but it came from a reliable source.

I didn't know they made sirens. I bet they're a well-engineered device, if I can judge by their other products. (Not the new consumer electronics crap from third world slave labor countries that bears the name Toshiba; I mean REAL Toshiba stuff).

If anyone can get some engineering facts on this siren, it's meritorious of a new thread "Toshiba Sirens"!
Charles

douro20 wrote:It's a Toshiba blower-fed siren. Single-tone, 120dbC. They are the only ones known to exist in the US. The power plant and the sirens were both installed by Toshiba.

So in addition to laptops and electronics, they make sirens?

I thought that, according to a post a couple of years ago, the sirens at SONGS were invented by one of their engineers to be high-performance sirens, having features like Teflon-coated rotors and so forth. Am I right, or are these sirens Japanese?

I remember hearing that these sirens only have four of the eight ports open at any time, maximizing pressure in the horn throats, and thus the efficiency of the siren as a whole when operating from forced air. Teflon-coated rotors would also be indicative of very tight internal allowances, which would also maximize the efficiency of the siren when operating from forced air. This siren is designed to be "blown".

I thought that, according to a post a couple of years ago, the sirens at SONGS were invented by one of their engineers to be high-performance sirens, having features like Teflon-coated rotors and so forth. Am I right, or are these sirens Japanese?

I was thinking the same as well since the patent drawings had Southern California Edison written on it as the owner of the patent.

I do suppose Toshiba may have provided some components of the siren. A quick check on their industrial products section of their website does show things like electric motors, variable frequency drives, and power distrubution products.

I believe the annual siren system test for SONGS is scheduled for October 18. As far as the custom electro-mechanicals, they are now replaced with Whelen 2800 and 2900 series sirens. They completed the replacement of all of the old sirens within the last year.

I just phoned Gloira Morrison at the Huntington Beach Emergency Services Desk... She confirms that tomorrow (9/29/06) at noon, they will conduct the monthly siren test as planned

I plan (TRAFFIC PERMITTING!!!!!) to be there, camera in hand. I will leave home in Santa Clarita at 9:00 and hope to travel the 75 miles by noon on the bedeviled San Diego Freeway. I haven't decided which location yet, but it will be one of the Thunderbolts.

Charles

Let us know How long , I hope at least a minute , for the test.
I was down there in the
Mid 1980,s all I got to here on the bolt nearest the main H. B. Library ( a
fiew blocks away ]
was about five to six seconds .