 | This article has multiple issues. Please help improve it or discuss these issues on the talk page . (Learn how and when to remove these template messages)
|
The Federal Signal Model 2 is an omnidirectional outdoor warning siren produced by Federal Signal Corporation.
The Model 2 features a 2 HP universal motor powering a single-tone 5-port chopper motor, which was also used on the Thunderbolt 1000, another siren once made by Federal Signal. It can produce 3 signals at 102 dBC:
The Model 2 is 25.5 inches tall by 12 inches wide, and weighs 68 lbs. It can be roof-mounted or pole-mounted, at a recommended 35–40 feet. It is available in two power choices: Model 2-120, running on single-phase 120/125 VAC, or Model 2-240, running on single-phase 240/250 VAC. It can be operated automatically or remotely with an indoor/outdoor Federal RC2W controller. [1]
It features a 100% sheet metal enclosure with polyester powder-coated paint. Protective mesh screens are mounted on the siren's three openings to keep out birds and debris.
The Model 2 was first introduced in 1929 alongside the Fedelcode line of sirens, replacing the antiquated and lackluster Type B. The first design of the Model 2 featured 3 louvers, 2 on top and 1 on the bottom. This design lasted until around 1953. The newer and current design has 1 louver on top and 2 on the bottom. Many early Model 2 units are known as "Long Legged" Model 2s.They were called this because the mounting legs that bolted to the motor were rather tall, at roughly 9 or 10 inches tall. It is also worth noting the Long Legs lacked the intake cone and stator ring for stabilizing the housing that newer sirens feature. The long leg sirens were predominately single tone, yet some dual tones have shown up, such as the example in New Orleans, LA that is pictured. The long leg sirens also used 4 brushes as opposed to 2. The 4 brush setup and long legs were replaced with a short leg, two brush setup around 1953, with the version still currently produced today. Although these differences are quite noticeable, the basic formula for the Model 2 has remained constant since the first ones were built around 1929. Federal had also made a coded version of the Model 2. A small motor located at the base of the siren would oscillate a gear which would move a metal shaft leading to the stator. Located at the top of the shaft was a small gear and a strip of gear teeth connected to the stator. When ever the bottom gear oscillates back and forth, the shaft would rotate and cause the stator to open and close making a "coded" signal. The coded model was advertised as "the fastest coding siren on the market", and was supposedly able to operate fast enough to produce Morse code. It is unknown how long the coded Model 2 was produced for, and is no longer in production.
The Model 2T was an omnidirectional siren manufactured by Federal Signal from the 1950s to the 1980s, mainly to fulfill the civil defense requirement for dual-tone warning signals. It had exactly the same design as the Model 2, but instead of a single-toned, 5-port chopper, it featured a dual-toned, 4/5 port chopper which produced 100 dBC at 100 ft. The 2T also ran on 120 or 240 VAC. The Model 2 is still being made, while the 2T's production ended sometime in the 1980s, around the time the need for civil defense sirens ended. The chopper from this siren was also used on Thunderbolt 1000T units built between 1954 and 1959. 1000T units built after 1959 used a unique 5/6 port chopper.
A civil defense siren, also known as an air-raid siren or tornado siren, is a siren used to provide an emergency population warning to the general population of approaching danger. It is sometimes sounded again to indicate the danger has passed. Some sirens, especially within small municipalities, are also used to alert the fire department when needed. Initially designed to warn city dwellers of air raids during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes. The generalized nature of sirens led to many of them being replaced with more specific warnings, such as the broadcast-based Emergency Alert System and the Cell Broadcast-based Wireless Emergency Alerts and EU-Alert mobile technologies.
A stepper motor, also known as step motor or stepping motor, is an electrical motor that rotates in a series of small angular steps, instead of continuously. Stepper motors are a type of digital actuator. Like other electromagnetic actuators, they convert electric energy into mechanical energy to perform work.
The Toyota Celica is an automobile produced by Toyota from 1970 until 2006. The Celica name derives from the Latin word coelica meaning heavenly or celestial. In Japan, the Celica was exclusive to the Toyota Corolla Store dealer chain. Produced across seven generations, the Celica was powered by various four-cylinder engines, and bodystyles included convertibles, liftbacks, coupés and notchback coupés.
A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals.
A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. There are two general types: mechanical and electronic.
The Honda Shadow refers to a family of cruiser-type motorcycles made by Honda since 1983. The Shadow line features motorcycles with a liquid-cooled 45 or 52-degree V-twin engine ranging from 125 to 1,100 cc engine displacement. The 250 cc Honda Rebel is associated with the Shadow line in certain markets.
The autodyne circuit was an improvement to radio signal amplification using the De Forest Audion vacuum tube amplifier. By allowing the tube to oscillate at a frequency slightly different from the desired signal, the sensitivity over other receivers was greatly improved. The autodyne circuit was invented by Edwin Howard Armstrong of Columbia University, New York, NY. He inserted a tuned circuit in the output circuit of the Audion vacuum tube amplifier. By adjusting the tuning of this tuned circuit, Armstrong was able to dramatically increase the gain of the Audion amplifier. Further increase in tuning resulted in the Audion amplifier reaching self-oscillation.
The BMW R1200RT is a touring or sport touring motorcycle that was manufactured from 2005 to 2019 by BMW Motorrad to replace the R1150RT model. It features a 1,170 cc (71 cu in) flat-twin engine with a six-speed gearbox and shaft drive.
The R60 and R60/2 are 600 cc boxer-twin that were manufactured from 1956 to 1969 in Munich, Germany, by BMW.
Federal Signal Modulators are electronic warning devices produced by Federal Signal Corporation that are used to alert the public about tornadoes, severe weather, earthquakes, fires, lahars, tsunamis, or any other disaster. They are identified mostly by their distinctive stacked "flying saucer" design. The Modulator II is sold based on the more compact chassis of the siren compared to the original Modulators.
SiraTone was a brand of electronic outdoor warning sirens produced by Federal Signal Corporation which began production in the early 1980s. These sirens were designed to broadcast high-intensity warning signals over a large area. SiraTone products are/were used for natural disaster notification, HAZMAT incident notification, fire call systems, and more. The SiraTone product line is no longer in production. The product line was succeeded by the Modulator and DSA electronic outdoor warning sirens.
Cyldon was the brand name for a range of model stationary steam engines, manufactured in Enfield, Middlesex, England between 1947 and 1951 by Sydney S Bird & Sons. The name Cyldon was an amalgamation of Sydney Bird's two son's names Cyril and Donald.
American Signal Corporation (ASC) is an outdoor warning siren and mass notification company in the United States. ASC was founded in 1873 as Biersach and Niedermeyer (B&N). After performing poorly, the company reformed as Alerting Communicators of America (ACA) in 1968, and expanded the line of warning systems they produced. In 1992, ACA went bankrupt and was bought and reformed as the American Signal Corporation.
The ACA Hurricane is an electro-mechanical and rotating-directional, 130dB civil defense siren, created and produced by Alerting Communicators of America (ACA). ACA began manufacturing the Hurricane 130 in 1968, and ended production in 1981. The Hurricane 130 is very similar to the Federal Signal Thunderbolt series, being a supercharged siren.
The Honda VFR1200F is the 7th generation Honda sport touring motorcycle from the VF and VFR line motorcycles powered by a transverse mounted V4 engine. The VFR1200F has several new technologies including the first dual clutch transmission offered on a motorcycle.
The Federal Signal 3T22 / 2T22 was a dual tone, mechanical outdoor warning siren made by Federal Signal Corporation from 1952 through the early 1990s. It has a very recognizable design, having a ten-port rotor (chopper) on the bottom with ten cones (horns) and a 12-port one on top with twelve cones.
The Koenigsegg Jesko is a limited production mid-engine sports car produced by Swedish automobile manufacturer Koenigsegg. The car was introduced at the 2019 Geneva Motor Show and it completely sold out before the show ended. The car succeeds the Agera. The name Jesko is a tribute to the company founder's father, Jesko von Koenigsegg. There are two variations of the car – "Absolut" and "Attack" (track-focused).
Canadian Line Materials LTD. (CLM) was a Canadian siren manufacturing company which built civil defense sirens. These sirens were built and installed all over Canada to warn residents and military about incoming nuclear attacks from the USSR during the Cold War.
The Thunderbolt is a discontinued mechanical outdoor warning siren made by Federal Signal Corporation. it is a unidirectional siren with a large yellow horn.
1. http://www.federalsignal-indust.com/product/2-omni-directional-siren
2. http://www.civildefensemuseum.org/sirens/manuals/2-5-SD10-STH10-STL10-255A154F.pdf
