Alerting Communicators of America

Key people | * Jim Biersach
* Sattelite communication and TVRO systems
* Indoor signal alarms
 Succeeded by | * Excel Alerting Communicators
* American Signal Corporation

**Alerting Communicators of America, Inc.** (**ACA**) was a company that was formed in 1967 that produced a wide variety of outdoor warning sirens during the mid to late 20th century. Originally **Biersach & Niedermeyer Co.**, ACA was formed after the original company went bankrupt. ACA's sirens became well known for their durability, performance, and rivalry with the Federal Signal Corporation.

## History

Originally, the company was known as Biersach & Niedermeyer Co (B&N) based out of Chicago, IL and originally a producer of fabricated metal products. It was founded by August Niedermeyer (1845-1939) and Louis Biersach (1843-1910) in 1873. The company would enter the siren business in 1942, after being contracted by the United States government to produce air raid sirens suitable for use on Pacific naval bases. B&N would design and create the Mobil Directo, which was an early rotational siren that was driven by a 25 hp Wisconsin gasoline engine. This siren was found to be perfect for areas without access to reliable electric power and was able to operate independently.

After the war ended, the siren would continue to be produced and sold as a civil defense siren, as the threat of the Cold War began to loom over the country. The company would introduce a version of the Mobil Directo with an electric motor instead of an engine in 1948, which was much easier to maintain and operate, and quickly became a popular outdoor warning siren. However, by the 1960s, the company's siren division had begun to fall on hard times. There was much competition and the Mobil Directo's sales were heavily waning, leading to the company selling off its siren division in 1967 and discontinuing the Mobil Directo.

The company's siren division was reformed into the Alerting Communicators of America, led by James Biersach, who quickly designed several new outdoor warning sirens in an attempt to claw back the sales lost due to competition from companies such as Federal Sign & Signal. These sirens were quickly found to be reliable, powerful and easy to maintain, and differed from other manufacturers through their innovative used of fibreglass construction, which was lighter and was much more resistant to corrosion and weathering than steel. In 1968, the company would release its first line of sirens, which would see many sales across the United States and the company quickly established a strong foothold in the market, challenging Federal's dominance.

ACA would redesign many of their sirens between 1972 and 1973, fixing a variety of issues that older designs had. Sales continued to rise, with the company often being contracted for both storm siren systems and nuclear plant siren systems. The company would remain producing the same siren models up until 1980, when the company began to streamline its lineup and introduced the Penetrator series of sirens, which proved to be easily the most popular sirens sold by the company.

Some siren models, such as the Allertor 125 and Hurricane 130, were discontinued and replaced by superior models. By the mid 1980s, the company also began to experiment with electronic sirens, which had become popularized by Whelen Engineering and Federal Signal at the time. However, ACA quickly began to run into problems in the mid to late 1980s. Their electronic sirens, known as the Alertronics, were proving to be unpopular, and sales were also waning once more thanks to increasing competition from the likes of Sentry Siren, Federal Signal, and Whelen Engineering.

By 1988, Federal Signal had introduced the 2001-SRN, which was able to use DC battery backup while matching or outperforming ACA's offerings. ACA attempted to create their own DC sirens to compete, but they proved to be expensive, bulky, and chewed through batteries quickly. Federal quickly became completely dominant, shutting ACA out of the market as the quality of ACA's sirens began to suffer. Whelen also completely prevented ACA from gaining a foothold in the electronic siren market, as their WPS-2800 and WS-3000 sirens proved far better than the Alertronics.

The final straw for ACA happened in November 1992, when ACA's parent company, B&N, went bankrupt. With heavy regrets and reluctance, ACA had to be sold off for good in order to recoup costs to pay off B&N's debts, leaving the company with no ownership. The company continued to produce sirens throughout 1993, before a German company known as Hörmann GmbH (known for the ECN and other sirens) became interested in purchasing the company to gain a foothold in the US siren market. ACA showed off many of its newer sirens at its facility in 1993, which sealed the deal after impressive results.

The company would be purchased by Hörmann, and would be reformed into the American Signal Corporation the same year. Many of ACA's sirens would be discontinued while others would be carried on into ASC, and ACA would ultimately come to an end. A few members of ACA split off to form Excel Alerting Communicators in 1997, which produced the Tempest-128 (originally designed in 1993) until the company absorbed the failing American Signal Corporation and renamed itself to ASC once more.

Today, the American Signal Corporation can be seen as a direct continuation of ACA, as the Tempest series of sirens are all based on an ACA design, and are run by the same people who ran ACA. Thus, even though ACA itself is long defunct, its sirens continue to warn the public of danger, both old and new.

## Products

### Rotational

#### Allertor 125

The Allertor 125 is a rotational, electromechanical civil defense siren that was produced by Alerting Communicators of America from 1968 until it was replaced by the similar Penetrator series in 1980. The Allertor was the direct successor to Biersach and Niedermeyer's Mobil Directo siren, with significant improvements to the design which simplified manufacturing and enhanced the siren's durability and performance versus its predecessor. Like the Mobil Directo, it is unique in that it sucks in air through the bottom intake horn, and then the sound comes out of the top horn of the projector.

In 1980, the Allertor was redesigned into the Penetrator-10 and 15, which replaced the giant projector with a simple horn and intake, which reduced costs and got rid of a lot of the Allertor's problems such as snow and ice building up inside the projector, and difficulty of installation. However, the Allertor's design offered superior performance. The Allertor was sold alongside the P-10 before it was finally discontinued, as it can be seen in ACA's 1983 catalogue. Despite its discontinuation, the siren was still supported by ACA and later ASC, with manuals and parts still being available for these sirens for a period of time, likely until the discontinuation of the RM-127 in 2004.

#### Howler

The ACA Howler is a rotational mechanical siren that was produced by ACA in the 1970s and 80s, as an attempt to produce a cheaper rotating siren that didn't have the same issues the larger Allertor 125 had. Unfortunately, rotator issues, along with being completely overshadowed by the Allertor and later the Penetrator-10 led to this siren selling few units despite its long production run.

The Howler was introduced in 1972, the same year that the Allertor 125 received its third generation redesign. It was found that the Allertor was prone to letting water into the projector drum which would then get trapped and freeze, which led to the rotor getting frozen stuck and burning out the motor. ACA decided to create a new siren platform that made use of a one-piece projector rather than the massive two piece projector of the Allertor, which would be not only cheaper, but also solve the icing problems. This siren would become the Howler. The Howler would be discontinued in 1989 due to low sales. Only a single Howler remains in service today, which is located in Cologne, MN.

#### Hurricane 130/130 MKII

The ACA Hurricane 130 is a Civil Defense siren designed by James E. Biersach, unveiled in 1968 alongside a large and diverse lineup of sirens from Alerting Communicators of America. Starting out with a square horn and an internal design that bottlenecked the siren's performance, the Hurricane went through many changes in design, sound, and overall functionality, despite being in production for only just over 10 years. The Hurricane 130 was heavily inspired by the Thunderbolt, which had been seeing great success, and ACA wanted a siren which could compete with its performance. Like all of ACA's other sirens such as the Allertor, Cyclone, Screamer and Banshee, the Hurricane made use of all-fibreglass casting, which was brand new and prevented the siren from corroding from the elements.

The siren originally used a square horn and a rotator that spun with the rest of the siren, and went through a few design changes throughout its production. In 1973, the siren underwent a massive overhaul, called the "Hurricane 130 MKII" by ACA. The square horn was replaced with a much larger round, exponential horn ending in two throats, which performed significantly better. In addition, the rotator would be redesigned again, now being completely stationary, and now in a teardrop shape. The company continued production of the Hurricane until 1980, when it was replaced in ACA's lineup with the significantly more powerful 50HP ACA Penetrator-50, which proved to be both louder, and more reliable without the need for a blower. These sirens often suffered from reliability issues often due to poor maintenance, and due to their complexity. This often led to their malfunction, failure, or replacement. The Hurricane is extremely rare today.

#### Penetrator

The Penetrator series is a series of rotating electromechanical sirens that was produced by Alerting Communicators of America that mainly consisted of 4 models: The P-10, P-15, PN-20, and the P-50. The Penetrator series proved to be one of ACA's most popular sirens throughout the 1980s for their reliability and output, and many can still be found in service today.

#### Alertronic

The Alertronic series of sirens is a line of sirens that was produced by Alerting Communicators of America (ACA) and later the American Signal Corporation (ASC). An ambitious attempt to compete in the budding electronic siren market in the 1980s, it was always the underdog in its market but made up for it with its quirks. The Alertronic series was introduced in 1983 as ACA's first fully electronic warning system. These were intended to compete in the electronic siren market against Whelen Engineering's popular WS-2000 and WS-3000 sirens and Federal Signal's EOWS series, which were seeing much success at the time. The Alertronics would meet their end in 2011, replaced by the E-Class and i-FORCE.

#### Tempest-128

While this siren is mainly known for being produced by the American Signal Corporation, the siren was originally designed in 1993 by ACA. It was likely intended to replace the Penetrator sirens and compete with the Federal Signal 2001, but Hörmann refused to put the siren into production. As a result, the siren would not be released until 1997 under Excel Alerting Communicators, before being sold by the American Signal Corporation after Excel acquired it. The Tempest-128 is still in production today.

### Omnidirectional

#### Screamer

The ACA Screamer was a series of small omnidirectional sirens that was produced by ACA and later ASC, and was the smallest of ACA's omnidirectional sirens (not including the Sentry 95), with the larger Banshee and Cyclone sirens being sold alongside them, and they enjoyed the longest production run of any of ACA's omnidirectional sirens.

The Screamer first appeared in ACA's catalogue in 1968, a year after ACA was formed after B&N's closure. The Screamer is a very simple siren in design, with a motor of variable horsepower attached to a mounting bracket, that drives the rotor. Screamers come with a fibreglass weatherproof shroud that protects the siren from the elements, with the shape differing depending on the model. This simple construction makes them relatively maintenance-free. Early Screamers had a more unified design, with the same shroud shape being used for every model, lacking the mounting bracket on the motor, and the model names also differed from the later Screamers. This design change would occur in 1973 in an attempt to streamline the series.

#### Banshee

The Banshee is a series of midrange omnidirectional mechanical sirens that was produced by ACA, and later ASC, over a span of nearly 40 years. Released onto the market in 1968 alongside the smaller Screamer series and the powerful Cyclone, the Banshee was a popular option for an omnidirectional siren, competing with Federal Signal's STH-10 and SD-10, as well as Sentry's smaller omnidirectionals. The siren was offered in single or dual rotor configurations, with the dual rotor variant being known as the "SuperBanshee".

In 1989, ACA experimented with a DC battery backup variant of the Banshee 115, known as the "Performance Plus" Banshees, and were sold alongside the Performance Plus Penetrators to compete with Federal's 2001 and the various electronic sirens available at the time such as the Federal Signal EOWS and Whelen WPS-2700 and 2800 that boasted DC power with battery backup, and were proving to be very popular. After ACA became ASC in 1994, the siren was renamed to the OM-120.

#### Cyclone

The ACA Cyclone is a powerful dual tone omnidirectional siren that was produced by ACA and later ASC after ACA's bankruptcy, and at the time of its release was the most powerful and loudest omnidirectional siren on the market, and to this day still trades blows with much newer sirens such as Sentry's 20VXT and 40V2T, and ASC's T-121. It was the loudest omnidirectional siren ACA offered, being sold alongside their Screamer and Banshee sirens. The Cyclone, along with the P-50, would have the longest production run of any ACA-era siren, being produced for nearly 50 years.
The Cyclone is a simple siren in design, with the intake being on the bottom where the siren is mounted. All Cyclones use an 8/12 port dual tone rotor and stator, with the motor being located on top. All Cyclones use the same rotor, which is a unique "dual-intake" design which was also used on Federal's 10/12 500-SHTT models which maximizes airflow to both rows of ports. This design is heavy and drags a lot, which requires the siren to use a very powerful motor. Like all of ACA's sirens, the Cyclone uses a fibreglass housing that protects the siren from corrosion, giving it exceptional longevity.

#### Sentry 95

The ACA Sentry 95 was a short-lived siren that was made by ACA. The Sentry 95 is a rebranded version of Klaxon Signals' SS6 siren, with the only difference between the two being the Sentry 95 having a rain shield included. It is unknown whether or not this siren was ever produced in the first place by ACA, as none have ever been documented. It was discontinued after 1970.

#### Alertronic

The Alertronic series of sirens is a line of sirens that was produced by Alerting Communicators of America (ACA) and later the American Signal Corporation (ASC). An ambitious attempt to compete in the budding electronic siren market in the 1980s, it was always the underdog in its market but made up for it with its quirks. The Alertronic series was introduced in 1983 as ACA's first fully electronic warning system. These were intended to compete in the electronic siren market against Whelen Engineering's popular WS-2000 and WS-3000 sirens and Federal Signal's EOWS series, which were seeing much success at the time. The Alertronics would meet their end in 2011, replaced by the E-Class and i-FORCE.

#### Quadren

The Quadren is a siren that was produced by Alerting Communicators of America, and later the American Signal Corporation since 1992. It is ACA/ASC's attempt to compete with Federal Signal's Modulator and Whelen's WPS-2800 and 2900 series of sirens and is easily the rarest of the three. It is sold alongside ASC's E-Class series of sirens.
The i-FORCE began production in 1992 as the Quadren. The Quadren was created by Alerting Communicators of America shortly after their bankruptcy in 1992, just before the company was renamed to the American Signal Corporation in 1994. It was considered a part of ACA's Alertronic line of sirens. The siren would continue to be produced under the American Signal Corporation beginning in 1994, being renamed the i-FORCE. The redesigned i-FORCE is still in production today, although it bears no resemblance to the ACA-era Quadren.