Wheelock

Eaton-Wheelock is one of the major companies.

History:
Some of the earliest signals produced by Wheelock were the A-1 series of AC-powered, dual-projector electromechanical horns. In the early 1970s, Wheelock introduced the 31 (AC-powered) and 34 (DC-powered) series of electromechanical horns. Around 1976, Wheelock created the 7001 (2-wire, flush-mount DC), 7002 (2-wire, surface-mount DC), 34+WS (4-wire, surface-mount DC), and 7004 (2-wire, surface-mount AC) electromechanical horn/strobes. These were the first fire alarm signals to use xenon strobes instead of incandescent lights. The horn and strobe on the 7001 and 7002 models are wired in series, causing the horn to produce a distinctive "skipping" sound when the strobe flashes. In 1985, Wheelock redesigned the horn's grilles, making them vandal resistant. This product line became extremely popular among third-party security companies, such as Honeywell, Ademco, and Cerberus Pyrotronics (now part of Siemens AG). In 1994, Wheelock discontinued this series, because their low-intensity strobes did not meet the new light distribution requirements of the ADA. The 31T is still in production today for general signaling purposes. (The red 31T 115 does fit all the requirements for a Fire Alarm signal however, and can be placed on a strobe plate without issue.) Cooper Wheelock also produces several bells as well as speakers, synchronization modules, chimes and voice evacuation products. Around 2006, Cooper Industries bought Wheelock. Cooper Wheelock does not manufacture fire alarm control panels, smoke detectors, heat detectors, or pull stations. Many fire alarm control panels are compatible with Cooper Wheelock's line of notification appliances and other products.

Lawsuit against Siemens:
In the year 2008, after Siemens bought out Faraday and Cerberus Pyrotronics, Cooper-Wheelock sued Siemens for patent violations, claiming Faraday devices were too similar to Wheelock devices. Siemens lost the lawsuit, and as a result, they could not manufacture they're own devices, and instead they had to rebrand Wheelock devices for 8 years. However as of 2021, Siemens still rebrands Wheelock's devices.

Today:
As of today, Wheelock is owned by the company Eaton. Formerly, they were owned by Cooper Industries.

Current Devices:

 * Wheelock MT-12/24-MCW/MCC
 * Wheelock AMT-12/24-MCW/MCC
 * Wheelock ZNS series (patents now owned by Siemens)
 * Wheelock Exceeder series
 * Wheelock LED Exceeder series
 * Wheelock AS (weatherproof only)
 * Wheelock 31T
 * Wheelock E-70 series
 * Wheelock E-50 series
 * Wheelock CH-70 series
 * Wheelock Motor Bell series
 * Wheelock SM/DSM sync modules
 * Wheelock RSSWP weatherproof remote strobes?

Former Devices:

 * Wheelock AS series (Non-Weatherproof models)
 * Wheelock NS series
 * Wheelock MT-12/24-LSM/SLM/LS/MS/IS
 * Wheelock AMT-12/24-LSM/SLM/LS/MS/IS
 * Wheelock EH/EHS series
 * Wheelock 34T mechanical horn
 * Wheelock 7002/7004 series
 * Wheelock 7002T/7004T series
 * Wheelock 7001
 * Wheelock 7001T
 * Wheelock AES series
 * Wheelock MIZ (strobe models)
 * Wheelock RS/SR Series
 * Wheelock ET series (WM/LSM/SLM/LS/MS/IS strobes)
 * Wheelock 712/24 chimes
 * Wheelock CH-DF1 series chimes
 * Wheelock RSS series remote strobes
 * WIP