Hedberg Super Sirens

Hedberg Manufacturing Company
[[File:|200px]] "If it's the loudest siren on the road - it's A HEDBERG!"
Names	Hedberg Manufacturing Company Hedberg Siren Company Hedberg Super Sirens J.N. Hedberg
Headquarters	321 West Reed St., San Jose, CA
Founder	James N. Hedberg
Key people	James N. Hedberg Selma Hedberg
Founded	1920
Defunct	1955

Hedberg Super Sirens, also Hedberg Siren Company and Hedberg Manufacturing Company, was a manufacturer of vehicular and outdoor warning sirens, based in San Jose, CA, started by James N. Hedberg in 1920. After failing to hear a police car's siren and getting a speeding ticket, Hedberg decided to build a better performing siren for the police department, creating so much demand that he was able to make a living from producing sirens for the next 35 years.

Siren production lasted until 1955, when Hedberg sadly passed at age 73. For the last three years the company remained in operation, ownership was handed over to his wife, Selma Hedberg, as James was in semi-retirement. Today, little to no Hedberg sirens are left in regular use, but many remain on display and parade fire engines, and in the private collections of many fire apparatus and siren enthusiasts. Hedberg's "long-rolling" vehicular sirens are widely renowned as having the longest coasting wind-downs of any vehicular siren ever made.

Outdoor warning sirens

10 hp Horizontal

Hedberg's 10 horsepower horizontal siren was one of the company's best-selling outdoor sirens. The siren is presumably 10 port, with a single large 20 inch rotor that had curved vanes, similar to a B&M siren. It had a large intake horn on the front, and stood on a tapered motor stand. Some came with motor hoods, while others had exposed weatherproof motors. The siren saw somewhat widespread use in California, with installations of multiple units known in San Jose, Palo Alto, and potentially Oakland. It was in production as early as 1942, and presumably lasted until around 1955 when James passed away. None are known to exist currently.

10 hp Vertical

The 10 horsepower vertical Hedberg, despite not having as many documented installations, still seemed to sell fairly well. Like the horizontal siren, it has a single, presumably 10 port, 20 inch rotor with curved vanes. It has a large cylindrical intake with a cone cover on top, and sits on a 4 legged motor stand. The siren was advertised to be audible at 11 miles away. One example of the 10hp vertical siren is known to exist in Comptche, CA as an active community warning siren. No other locations are known.

20 hp Horizontal

WIP

Dual tone vertical

WIP

Vehicular sirens

WIP