Manufacturer: Ward Leonard Electric Company Headquarters: Mount Vernon, New York Founded: 1898 Documented Asbestos Use: Mid-twentieth century (allegations in litigation records) Product Categories: Automatic bus-transfer switches; motor controllers; electrical resistors and rheostats; voltage regulators Legal Status: Tier 2 — Active and historical litigation; no bankruptcy trust established

Company History

Ward Leonard Electric Company was incorporated in 1898 by electrical engineer Harry Ward Leonard, whose motor speed-control method — the “Ward Leonard system,” patented in 1891 — became a foundational technology in industrial motor control. The company, which by the early twentieth century operated from Mount Vernon, New York, went on to manufacture motor controllers, automatic bus-transfer switches, electrical resistors and rheostats, voltage regulators, and related control apparatus. Ward Leonard control equipment was adopted for demanding industrial and marine applications, and the Ward Leonard control system was used by the U.S. Navy in the early twentieth century.

Ward Leonard bus-transfer switches and motor controllers were installed in electrical distribution and machinery-control systems, where switching contacts, arc-interrupting components, and control apparatus operated under electrical arcing and heat.

According to U.S. Navy machinery and equipment records, Ward Leonard electrical control equipment was documented as installed original equipment (OEM) aboard U.S. Navy vessels, including aircraft carriers such as USS Nimitz (CVN-68) and USS Forrestal (CVA-59). In shipboard service, bus-transfer switches and motor controllers were installed in electrical distribution and machinery-control spaces.

During the decades when electrical control equipment of this type was manufactured — roughly the 1940s through the early 1980s — asbestos was a standard material used for arc resistance, electrical insulation, and thermal protection in switchgear and control apparatus across the industry. According to asbestos litigation records, workers who installed or maintained Ward Leonard equipment during this era have alleged exposure to asbestos-containing components associated with those products.

Asbestos-Containing Products

Ward Leonard Electric did not manufacture asbestos as a raw material. However, according to asbestos litigation records, motor controllers, bus-transfer switches, and control apparatus associated with the company were alleged to have incorporated asbestos-containing components during the period of their manufacture and use.

Arc chutes and arc barriers. Switching and control equipment that interrupts electrical current generates arcs, and asbestos and asbestos-filled materials were widely used for arc chutes, arc barriers, and arc-resistant panels because of their heat and flame resistance. Plaintiffs have alleged that motor controllers and transfer switches of this era incorporated asbestos-containing arc-interrupting components.

Insulating panels, boards, and phenolic components. Litigation records involving electrical control equipment allege that asbestos-containing insulating boards, barriers, and asbestos-filled phenolic components were used to insulate and separate energized parts within controllers and switch assemblies. Plaintiffs have alleged that machining, cutting, or replacing these components could release fibers.

Resistor and rheostat insulation. Resistors and rheostats used in motor-control and voltage-regulating equipment dissipate heat, and litigation records involving comparable equipment allege that asbestos-containing insulation was associated with these heat-generating components.

Whether a specific Ward Leonard model incorporated asbestos-containing components, and the extent of any such use, varies across individual cases and jurisdictions. Individuals seeking to confirm the composition of a particular unit are encouraged to consult product documentation from the relevant era or an attorney with access to product identification records.

Occupational Exposure

According to asbestos litigation records, exposure associated with electrical control equipment of this type has been alleged across a range of industrial and marine occupations. The following worker categories appear with regularity in claims involving switchgear, controllers, and control apparatus:

Electricians and Electrical Maintenance Workers — Workers who installed, wired, and serviced motor controllers and transfer switches handled arc chutes, insulating barriers, and control components alleged to contain asbestos.

Switchgear and Controls Technicians — Personnel who assembled, tested, and repaired control apparatus were among those who could disturb asbestos-containing arc-interrupting and insulating materials, according to plaintiffs’ allegations.

Powerhouse and Industrial Maintenance Workers — Personnel responsible for electrical distribution and machinery-control systems maintained switches and controllers as part of routine work.

Navy Personnel and Shipyard Workers — Electrician’s mates and shipyard trades who installed and maintained bus-transfer switches, motor controllers, and control apparatus aboard naval vessels worked in enclosed electrical and machinery spaces.

Bystander and Secondary Exposure — Litigation records also reflect claims by workers who were not directly servicing this equipment but worked nearby while others disturbed asbestos-containing arc chutes or insulation, as well as family members exposed through take-home contamination on work clothing.

The period of heaviest alleged exposure corresponds approximately to the 1940s through the early 1980s, consistent with the broader industrial use of asbestos-containing materials before regulatory action by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) prompted a significant reduction in asbestos use across American industry.

It should be noted that the latency period for asbestos-related diseases — including mesothelioma, asbestosis, and asbestos-related lung cancer — is typically between 20 and 50 years following initial exposure.

Trust Fund / Legal Status

Ward Leonard Electric Company is classified as a Tier 2 manufacturer for purposes of this reference site. This designation means that the company has been named as a defendant in asbestos-related litigation, but no dedicated asbestos bankruptcy trust fund has been established in its name. Accordingly, claims involving Ward Leonard equipment are not resolved through a trust fund claims process in the same manner as claims against companies that reorganized under Chapter 11 specifically due to asbestos liability.

Plaintiffs have alleged in asbestos cases that asbestos-containing components were associated with Ward Leonard controllers, switches, and control apparatus. Because the company has operated over a long period and through corporate relationships, individuals pursuing legal claims may need to account for corporate succession when identifying appropriate defendants. An experienced asbestos attorney can assist in tracing corporate histories and identifying responsible parties.

For individuals who worked with Ward Leonard equipment and were also exposed to asbestos-containing products from other manufacturers — a common circumstance in industrial and marine environments — separate trust fund claims may be available through those manufacturers’ established asbestos trusts.

If you or a family member worked with or around Ward Leonard motor controllers, transfer switches, or control apparatus during the 1940s through the early 1980s and has since been diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer, legal options may be available.

Key points to understand:

  • Ward Leonard has been named in asbestos litigation, but does not operate a dedicated asbestos bankruptcy trust fund. Claims would be pursued through direct civil litigation rather than a trust claims process.
  • Corporate succession involving later ownership of Ward Leonard may be relevant to identifying proper defendants.
  • Workers exposed to multiple asbestos-containing products — as was common in power plants, shipyards, and other industrial settings — may be eligible to file claims against multiple responsible parties, including manufacturers with established trust funds.
  • The long latency period for asbestos-related disease means that exposure from decades ago can give rise to claims today.
  • An attorney specializing in asbestos litigation can review your work history, identify relevant products and manufacturers, and advise on available legal remedies.

Documentation of your work history — including employers, job sites, job titles, and any product names or model numbers you can recall — is valuable when consulting with an attorney and should be preserved.

This reference article is provided for informational purposes to workers, families, and legal professionals researching asbestos exposure history. It does not constitute legal advice. Product identification and litigation history are drawn from publicly available court records and regulatory documentation.