Federal Signal Corporation
Corporate brand
UnclaimedFederal Signal Corporation is a United States manufacturer of environmental, emergency-response, signaling, and public-safety equipment.
Last updated August 25, 2026
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Overview
Federal Signal Corporation is an American industrial manufacturer headquartered in Downers Grove, Illinois. Its products serve two closely related fields: environmental and infrastructure-maintenance equipment, and safety, security, and emergency communications. The company is best known for equipment such as street sweepers, sewer-cleaning and vacuum-loader trucks, hydro-excavation systems, waterblasting equipment, dump bodies, trailers, emergency vehicle lighting, warning sirens, alarms, campus alerting systems, and public-address systems. The business traces its origins to the Federal Electric Company, established in Chicago in 1901 by brothers John and James Gilchrist and their partner John Goehst. The original business manufactured and sold store signs illuminated by incandescent lamps. By 1915, it had expanded into electrically operated mechanical sirens, including the Q Siren and Model 66. The company later came under the ownership of Commonwealth Edison and became associated with the utility interests of Samuel Insull. During the middle decades of the twentieth century, Federal Signal developed a significant position in outdoor warning systems. Its Thunderbolt sirens, introduced during the Cold War era, were designed primarily for civil-defense warnings, including alerts associated with air raids and nuclear fallout. Some Thunderbolt installations continued to operate in municipal severe-weather warning systems long after the Cold War. The company also developed emergency-vehicle lighting, including Beacon-Ray and TwinSonic products associated with engineer Earl Gosswiller, as well as police sirens, fire alarms, and outdoor lighting. The company was incorporated as Federal Sign and Signal Corporation in 1955 and became publicly traded on NASDAQ in 1961. It expanded its product portfolio through organic development and acquisitions, including the 1962 merger with Electrical Products Corporation, a Los Angeles sign manufacturer. In 1976, the corporation adopted the name Federal Signal Corporation. In later decades, Federal Signal increasingly diversified beyond traditional signaling products. Its environmental solutions activities expanded into municipal street sweeping, sewer and catch-basin cleaning, vacuum loading, hydro-excavation, road marking, waterblasting, refuse-related equipment, specialty truck bodies, trailers, and infrastructure-maintenance machinery. Its safety and security activities continued to cover emergency lighting, sirens, alarm systems, public-address equipment, and campus or mass-notification systems. The company has used acquisitions to broaden its environmental-equipment platform. Notable transactions include P.C.S. Company in 2000, a joint venture in China established in 2005, Joe Johnson Equipment in 2016, Truck Bodies and Equipment International in 2017, Mark Rite Lines Equipment Company and HighMark Traffic Services in 2019, Blasters in 2022, and Hog Technologies in 2025. The company also announced or completed later acquisitions involving New Way Trucks and Mega Corp. Federal Signal reports a manufacturing footprint comprising 13 facilities in five countries. Its present business is therefore broader than its historical identity as a siren and signal manufacturer: it operates as a diversified provider of equipment used by municipalities, contractors, public-safety organizations, transportation authorities, industrial operators, and infrastructure-maintenance businesses.
History
Federal Signal began in Chicago in 1901 as the Federal Electric Company, founded by John and James Gilchrist and John Goehst. Its first products were incandescently illuminated store signs. The company entered the signaling field in 1915, when it began producing electrically operated mechanical sirens such as the Q Siren and Model 66. Federal Electric later became part of Commonwealth Edison's corporate interests and was associated with Samuel Insull's utility empire. By the 1950s, the company was manufacturing outdoor warning sirens, fire alarms, police sirens, and outdoor lighting. Its Thunderbolt line became particularly associated with Cold War civil defense, although surviving units were later used by some communities for tornado and other severe-weather warnings. Federal Signal also developed emergency-vehicle lighting products, including Beacon-Ray and TwinSonic systems, and expanded its technical capabilities in warning and signaling equipment. In 1955, the business was incorporated under the name Federal Sign and Signal Corporation. It went public in 1961, trading on NASDAQ, and in 1962 merged with Electrical Products Corporation of Los Angeles, a sign manufacturer. The corporation adopted the Federal Signal Corporation name in 1976. The modern company broadened its scope through acquisitions and product development. It added environmental and infrastructure-maintenance equipment, including street sweepers, sewer cleaners, vacuum loaders, hydro-excavators, waterblasting machinery, road-marking systems, dump bodies, and trailers. Its safety and security group retained the historic signaling focus while adding emergency lighting, mass notification, campus alerting, alarms, public-address systems, and outdoor warning systems. Expansion transactions included P.C.S. Company in 2000 and a Chinese environmental and sanitary vehicle joint venture announced in 2005. Joe Johnson Equipment was acquired in 2016, followed by Truck Bodies and Equipment International in 2017. In 2019, Federal Signal acquired Mark Rite Lines equipment and HighMark Traffic Services. The environmental platform continued to expand through the acquisition of Blasters in 2022 and Hog Technologies in 2025. Later announced transactions added New Way Trucks, a refuse-vehicle manufacturer, and Mega Corp., a producer of specialty equipment for extraction and construction applications. Federal Signal now operates through Environmental Solutions and Safety and Security Systems groups. Its manufacturing network includes 13 facilities in five countries, and its customer base spans municipal governments, contractors, emergency services, transportation and infrastructure organizations, industrial companies, and other public-safety users.
- 2025
Hog Technologies acquired
[1]Federal Signal announced the acquisition of Waterblasting, LLC, owner of Hog Technologies.
- 2022
Blasters acquired
[1]Federal Signal announced the acquisition of Blasters and its truck-mounted waterblasting equipment operations.
- 2019
Road-marking platform expanded
[1]Federal Signal completed the acquisition of Mark Rite Lines equipment and HighMark Traffic Services.
- 2017
TBEI acquired
[1]The acquisition of Truck Bodies and Equipment International added multiple dump-body and trailer brands.
- 2016
Joe Johnson Equipment acquired
[1]Federal Signal announced the acquisition of Joe Johnson Equipment, expanding its infrastructure-maintenance equipment business.
- 1976
Federal Signal name adopted
[1]The corporation changed its name to Federal Signal Corporation.
- 1962
Merger with Electrical Products Corporation
[1]The company merged with Electrical Products Corporation, a Los Angeles sign manufacturer.
- 1961
Public listing
[1]Federal Sign and Signal began trading publicly on NASDAQ.
- 1955
Renamed Federal Sign and Signal Corporation
[1]The company became a corporation under the Federal Sign and Signal Corporation name.
- 1915
Entry into mechanical sirens
[1]Federal Electric began manufacturing electrically operated mechanical sirens, including the Q Siren and Model 66.
Products and positioning
A diversified industrial supplier combining municipal and infrastructure-maintenance equipment with emergency warning, communications, lighting, and public-safety systems.
Outdoor warning sirens · 1952
Thunderbolt
The Thunderbolt was a series of rotating outdoor warning sirens produced from 1952 to 1990. Developed largely for Cold War civil-defense warning, the line included single-tone, dual-tone, and hi-lo configurations. Some units remained in municipal severe-weather warning service, while others were retired, preserved, or refurbished.
Outdoor warning siren
STH-10
The STH-10 was a discontinued omnidirectional siren produced over approximately five decades. It used a 10-horsepower alternating-current motor and a twelve-port design. Although no longer a current product, surviving examples remain in municipal, collector, and refurbishment contexts.
Emergency vehicle lighting
Beacon-Ray
Beacon-Ray was one of Federal Signal's historically important emergency-vehicle lighting product families. Associated with engineer Earl Gosswiller, it helped establish the company's long-running role in visual warning equipment for police, fire, and other emergency vehicles.
Emergency vehicle lighting
TwinSonic
TwinSonic was a Federal Signal emergency-vehicle lightbar product family associated with the company's classic warning-equipment portfolio. It was used to provide conspicuous visual signaling on emergency vehicles and became a recognizable historical product line.
Municipal and infrastructure-maintenance equipment
Environmental Solutions equipment
Federal Signal's Environmental Solutions activities encompass street sweepers, sewer cleaners, vacuum loaders, hydro-excavators, waterblasting systems, road-marking equipment, dump bodies, trailers, refuse collection vehicles, and related specialty equipment. These products are aimed at municipalities, contractors, utilities, transportation agencies, and industrial customers.
Emergency communication and warning systems
Safety and Security Systems
The Safety and Security Systems group supplies emergency vehicle lighting, outdoor warning sirens, alarms, public-address systems, campus alerting systems, and related mass-notification equipment. The group extends Federal Signal's historic signaling expertise into contemporary public-safety and emergency-communications applications.
Brand decisions
2025
Acquire Hog TechnologiesM&ABackground
Federal Signal pursued additional capabilities in road marking, line removal, and waterblasting equipment.
Action taken
The company announced the acquisition of Waterblasting, LLC, owner of Hog Technologies, together with a proposed acquisition of Hog's primary manufacturing facility.
Aftermath
The transaction was intended to strengthen Federal Signal's position in specialized road-maintenance and waterblasting equipment.
Initial purchase price for Waterblasting, LLC. $78.1 million (Announced February 12, 2025)
2019
Expand into road-marking equipment and servicesM&ABackground
Road-marking equipment and related services complemented Federal Signal's broader infrastructure-maintenance portfolio.
Action taken
Federal Signal acquired the assets and operations of Mark Rite Lines Equipment Company and HighMark Traffic Services.
Aftermath
The company added road-marking equipment manufacturing and road-marking services to its environmental solutions platform.
2017
Acquire Truck Bodies and Equipment InternationalM&ABackground
Federal Signal sought to enlarge its environmental-equipment platform with additional dump-body and trailer capabilities.
Action taken
The company acquired Truck Bodies and Equipment International, adding six dump-body and trailer brands to its portfolio.
Aftermath
The transaction broadened Federal Signal's vehicle-body and trailer offering within its Environmental Solutions activities.
Recent events
Reported
Federal Signal completes acquisition of Deist businesses[2]
Federal Signal announced that it completed the acquisition of substantially all assets and operations of Deist Industries, Bucks Fabricating, Roll-Off Parts and Switch-N-Go, businesses located in Pennsylvania.
Reported
Federal Signal completes acquisition of OSW[3]
Federal Signal announced that it completed its cash acquisition of OSW Equipment and Repair for $52.5 million. The acquisition also included the operations of Northend Truck Equipment and Western Truck Body.
Sources3 sources
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