500 Series: Difference between revisions

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{{infobox siren
{{Infobox siren
|company=[[Federal Signal Corporation]]
|image=[[File:500.png|thumb|A Federal 500SH-TT located in Abilene, KS]]
|type=[[electromechanical]]
|company= [[Federal Signal Corporation]]
|produced=1953-1982
|type=[[Electromechanical]]
|phase=1 or 3
|voltage=120, 220, 240, or 480
|neigh=10-20
|output=123-130
|succeeded= [[508]], [[2001SRN]], & [[RSH-10]]
}}
}}
The 500 Series was a line of [[electromechanical]] sirens produced by [[Federal Signal Corporation|Federal Sign & Signal]].  
The 500 Series was a line of [[electromechanical]] sirens produced by [[Federal Signal Corporation|Federal Sign & Signal]].  
It went through a lot of prototyping, ranging from a coded unit that allows it to make a "pulsed" signal, along with variants of single and dual tone models, even different phase motors were tested. They finally settled on one design that was compact, yet effective. This model unfortunately was advertised as a "mid-range" siren by Federal, which in turn caused their [[Thunderbolt]] siren to outsell it by a long shot.  
It went through a lot of prototyping, ranging from a coded unit that allows it to make a "pulsed" signal, along with variants of single and dual tone models, even different phase motors were tested. They finally settled on one design that was compact, yet effective. This model unfortunately was advertised as a "mid-range" siren by Federal, which in turn caused their [[Thunderbolt]] siren to outsell it by a long shot.
The most powerful unit they made was the 10/12 port, 3-phase 500SHTT, meaning single head two tone. This model packed a punch and performed well past their advertised 120dBc rating, pushing 128 or more. The most common inactive model of this sires was the 500T or the 500's used in L.A.
 
the other models were the 500A 500B 500C ( 500 coded ) the 550 models 500-A-SH and 500-SH-TT. The 550's are quite rare with only around 50 of these models being made and only a few being left as of 2017-2018. the only 3 known locations of ones still standing are in Callahan CO, lockwood NV ontop of a fire station on canyon way, and somewhere in Yonkers NY (most likely inactive.)
The 500 had 3 such models throughout its lifespan, the 500SH, 500SH-TT, and the 500DH-TT. SH stands for Single Head, TT stands for Two Tone, and DH stands for Dual Head.
 
==Earlier Models==
[[File:Reedsburg2 wi.jpg|thumb|left|A 500-SH with the support bars.]]
The earlier 500, mostly seen around Los Angeles, have a shorter projector unlike the later ones, they were offered in 9/12 port, 12 port, and more rarer 8 port. Some models had support bars inside the projector to mitigate warping. Some models used the STH-10 chopper and stator and had a larger horn.
 
==500-DHTT==
[[File:Example.jpg|thumb|right|A 500-DHTT with parts missing.]]
The 500-DHTT is a dual horn variant of the 500, they were offered with a 15 or 20 horsepower motor. In 1957 they increased the length of the rotator shaft, giving the siren head more clearance of the rotator body. They were produced as late as 1965-67.
Roughly 100 were ever made, and 7 units are known to exist as of 2022.
=== Details ===
The projectors are a two piece construction held together by rivets, it is attached to a sheet metal ring located on the stator by rivets and bolts. This ring also has a corrugated section for the motor cover to be held on by machine screws. The motor cover is fastened to the pedestal by 4 bolts, two on each side. The entire siren weighs about 1,250 pounds.


==Media==
* {{Link-inline-video |link=9iWDtVkUaKg |name= 10/12 500-SHTT in Dundee, Michigan}}
* {{Link-inline-video |link=E5JUx3hclIc|name= 9/12 500AT in Bristol, Tennessee}}
* {{Link-inline-video |link=nTlIOqlD9rI|name= 12 port 500-SH in Stewartsville, Missouri}}
* {{Link-inline-video |link=FNBG35QF3QU |name= 500-DHTT in Calhan, Colorado}}
[[Category:Sirens]][[Category:Rotating Sirens]][[Category:Electromechanical Sirens]][[Category:Single Toned Sirens]][[Category:Dual Toned Sirens]][[Category:Federal Signal Corporation]]
[[Category:Sirens]][[Category:Rotating Sirens]][[Category:Electromechanical Sirens]][[Category:Single Toned Sirens]][[Category:Dual Toned Sirens]][[Category:Federal Signal Corporation]]

Latest revision as of 08:17, 29 March 2024

500 Series
A Federal 500SH-TT located in Abilene, KS
Company Federal Signal Corporation
Produced 1953-1982
Type Electromechanical
Sound output 123-130 dBc at 100 feet
Horsepower 10-20
Voltage 120, 220, 240, or 480V
Succeeded by 508, 2001SRN, & RSH-10


The 500 Series was a line of electromechanical sirens produced by Federal Sign & Signal. It went through a lot of prototyping, ranging from a coded unit that allows it to make a "pulsed" signal, along with variants of single and dual tone models, even different phase motors were tested. They finally settled on one design that was compact, yet effective. This model unfortunately was advertised as a "mid-range" siren by Federal, which in turn caused their Thunderbolt siren to outsell it by a long shot.

The 500 had 3 such models throughout its lifespan, the 500SH, 500SH-TT, and the 500DH-TT. SH stands for Single Head, TT stands for Two Tone, and DH stands for Dual Head.

Earlier Models

A 500-SH with the support bars.

The earlier 500, mostly seen around Los Angeles, have a shorter projector unlike the later ones, they were offered in 9/12 port, 12 port, and more rarer 8 port. Some models had support bars inside the projector to mitigate warping. Some models used the STH-10 chopper and stator and had a larger horn.

500-DHTT

A 500-DHTT with parts missing.

The 500-DHTT is a dual horn variant of the 500, they were offered with a 15 or 20 horsepower motor. In 1957 they increased the length of the rotator shaft, giving the siren head more clearance of the rotator body. They were produced as late as 1965-67. Roughly 100 were ever made, and 7 units are known to exist as of 2022.

Details

The projectors are a two piece construction held together by rivets, it is attached to a sheet metal ring located on the stator by rivets and bolts. This ring also has a corrugated section for the motor cover to be held on by machine screws. The motor cover is fastened to the pedestal by 4 bolts, two on each side. The entire siren weighs about 1,250 pounds.

Media