||It has been suggested that this article be merged with Federal Signal Corporation. (Discuss) Proposed since September 2014.|
The Thunderbolt siren consisted of three major components: the blower, rotator and siren chopper. The Thunderbolt was introduced in 1952; discontinued in the early 1990s. Many Thunderbolts were made during the cold war for air raid warning purposes. It was advertised as having constant volume regardless of pitch. In Late 1988, Federal Signal introduced a single-tone siren called the 2001 Series; the Thunderbolt was phased out by 1990.
There were 3 models manufactured, most of them producing approximately 127dB at 100ft:
- Model 1000, a single-tone siren capable of two signals (alert and attack).
- Model 1000T, a dual-tone version of the 1000.
- Model 1003, a dual-tone version with the added capability of producing a High-Low or a "Pulse" signal with solenoid valves.
- Model 2000, A Single-tone thunderbolt 1000 with a gasoline-powered Roots Blower.
The "System 7000" line was a generator back-up version of the Thunderbolt. These were available as 3 separate models:
- Model 7012, a single-tone siren capable of two signals (alert and attack).
- Model 7022, is the same as Model 7012, but is dual tone.
- Model 7026, uses a dual-tone Thunderbolt siren with the addition of two solenoids to produce six siren signals: wail, pulsed steady, steady, alternating steady, alternating wail, and pulsed wail.
- Unknown author and date Ad for the Thunderbolt siren
- Unknown author and date Federal Outdoor Alarm System