STL-10: Difference between revisions
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{{Infobox siren | {{Infobox siren|title=Model STL-10|image=Model STL-10.png|caption=A Model STL-10 in French Camp, CA. Photo taken by CaliSirens00.|company=<div>[[Federal Signal Corporation|Federal Enterprises]] | ||
|title = | <div>[[Federal Signal Corporation|Federal Sign & Signal]] | ||
<div>[[Federal Signal Corporation|Federal Signal]]|produced=1953-1995|type=[[Omnidirectional]] [[Electromechanical]]|output=114 dB @ 100 ft|hz=50/60|hp=7.5-10 hp|voltage=208-240/480|current=AC 1 or 3 ph|preceded=<div>[[Federal Electric Fedelcode]] | |||
| | <div>[[Federal Signal Model 5]]|succeeded=[[Federal Signal Model ECLIPSE]]|manual=https://drive.google.com/file/d/1wz2Vk4vd9mgvjS9ioooqsj3vor7PWpfk/view?usp=sharing}}The '''Model''' '''STL-10''' ('''S'''ingle '''T'''one '''L'''ow, '''10''' Horsepower) is an omnidirectional vertical siren that was produced by Federal Signal during the mid to late 20th century which found popularity as both a fire siren and a civil defense siren. | ||
|produced = | |||
|type = [[Electromechanical]] | |||
|output = 114 | |||
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|manual = | |||
}} | |||
The | == History == | ||
The Model STL-10 was introduced in 1953 by Federal Enterprises as an alternative to Federal Signal's popular [[Federal Signal STH-10|Model STH-10]], [[XT22|Model 2T22]], and [[XT22|Model 3T22]] sirens. Its low tone made it very distinct from other sirens and contributed to its high range of audibility. The low pitch made it more effective in areas where range was more important than pitch, or where a higher-pitch sound may be lost in other background noise. The siren was especially suitable in urban areas, where higher pitched sirens may lose range from traffic noise and the many obstructions such as buildings. The Model STL-10, along with its smaller brother the Model STH-10, were mainly sold as fire sirens. While they were also used for civil defense purposes, their main purpose was to alert volunteer firefighters to report to the fire station to go fight a fire. The Model STL-10 saw most of its success in urban areas such as New York and San Francisco, where its unmistakable piercing low sound was distinctly heard over the noise of traffic at great distances. The Model STL-10 was nowhere as popular as the Model STH-10, and as a result, they are harder to find than Model STH-10s. Due to waning sales compared to the Model STH-10 as the use of fire sirens diminished, the Model STL-10 was discontinued in 1995, while the Model STH-10 continued to be sold until 2005. Both were effectively replaced by the [[Federal Signal Model ECLIPSE|Model ECLIPSE<sup>8</sup>]] in Federal Signal's lineup, as it had battery backup capabilities and improved performance while operating at a similar pitch. | |||
== | == Design == | ||
The STL-10 at its core sports a 20.5" 7-port rotor and stator, a bare 1 or 3 ph (1 and 3 ph Model STL-10 sirens are named Model STL-10B and Model STL-10A respectively) 208-240/480 V induction motor above the rotor/stator assembly, which has an eyebolt attached for mounting and no shielding from the elements, and 7 rounded metal horns attached to each stator port to project the sound directly from the rotor. Mesh screens are included on each horn to protect the rotor from debris. A cylindrical intake is located below the siren in between the siren's 3 included mounting legs. The siren boasts a decibel rating of 114 dB at 100 ft. | |||
== Gallery == | |||
<gallery> | |||
File:STL-10 Rotor.jpg|The Model STL-10 rotor, with 7 long vanes. | |||
File:Square horned STL-10.png|A Model STL-10 with square horns in Warrenton, VA. Photo credit to Ben Schumin. | |||
</gallery> | |||
[[Category:Sirens]][[Category:Single Toned Sirens]][[Category:Electromechanical Sirens]][[Category:Omnidirectional Sirens]][[Category:Federal Signal Corporation]] | [[Category:Sirens]][[Category:Single Toned Sirens]][[Category:Electromechanical Sirens]][[Category:Omnidirectional Sirens]][[Category:Federal Signal Corporation]] | ||
__INDEX__ | |||
Latest revision as of 21:06, 31 December 2024
| Model STL-10 | |
 A Model STL-10 in French Camp, CA. Photo taken by CaliSirens00. | |
| Company | |
|---|---|
| Produced | 1953-1995 |
| Type | Omnidirectional Electromechanical |
| Sound output | 114 dB @ 100 ft |
| Frequency | 50/60 Hz |
| Horsepower | 7.5-10 hp |
| Voltage | 208-240/480 V AC 1 or 3 ph |
| Preceded by | |
| Succeeded by | Federal Signal Model ECLIPSE |
| Documentation | Manual |
The Model STL-10 (Single Tone Low, 10 Horsepower) is an omnidirectional vertical siren that was produced by Federal Signal during the mid to late 20th century which found popularity as both a fire siren and a civil defense siren.
History
The Model STL-10 was introduced in 1953 by Federal Enterprises as an alternative to Federal Signal's popular Model STH-10, Model 2T22, and Model 3T22 sirens. Its low tone made it very distinct from other sirens and contributed to its high range of audibility. The low pitch made it more effective in areas where range was more important than pitch, or where a higher-pitch sound may be lost in other background noise. The siren was especially suitable in urban areas, where higher pitched sirens may lose range from traffic noise and the many obstructions such as buildings. The Model STL-10, along with its smaller brother the Model STH-10, were mainly sold as fire sirens. While they were also used for civil defense purposes, their main purpose was to alert volunteer firefighters to report to the fire station to go fight a fire. The Model STL-10 saw most of its success in urban areas such as New York and San Francisco, where its unmistakable piercing low sound was distinctly heard over the noise of traffic at great distances. The Model STL-10 was nowhere as popular as the Model STH-10, and as a result, they are harder to find than Model STH-10s. Due to waning sales compared to the Model STH-10 as the use of fire sirens diminished, the Model STL-10 was discontinued in 1995, while the Model STH-10 continued to be sold until 2005. Both were effectively replaced by the Model ECLIPSE8 in Federal Signal's lineup, as it had battery backup capabilities and improved performance while operating at a similar pitch.
Design
The STL-10 at its core sports a 20.5" 7-port rotor and stator, a bare 1 or 3 ph (1 and 3 ph Model STL-10 sirens are named Model STL-10B and Model STL-10A respectively) 208-240/480 V induction motor above the rotor/stator assembly, which has an eyebolt attached for mounting and no shielding from the elements, and 7 rounded metal horns attached to each stator port to project the sound directly from the rotor. Mesh screens are included on each horn to protect the rotor from debris. A cylindrical intake is located below the siren in between the siren's 3 included mounting legs. The siren boasts a decibel rating of 114 dB at 100 ft.
Gallery
-
The Model STL-10 rotor, with 7 long vanes.
-
A Model STL-10 with square horns in Warrenton, VA. Photo credit to Ben Schumin.
