What is a Wig Wag? Understanding the Mechanisms and Applications

Wig wags are fascinating devices that serve various purposes across different industries, from transportation to household appliances. This comprehensive guide will dive deep into what wig wags are, their historical significance, types, and applications. By the end, you’ll have a thorough understanding of this unique term and its relevance today.

Comparison Table: Types and Applications of Wig Wags

Type	Description	Applications
Railroad Wig Wag	A signal used at grade crossings, featuring a swinging disk to indicate an approaching train.	Railroads, heritage railroads, and museums.
Wig Wag in Washing Machines	A solenoid mechanism used in older belt-drive washing machines.	Household appliances, specifically Whirlpool and Kenmore models from 1950 to 1987.
Automotive Wig Wag	A device that controls the flashing of vehicle lights for safety signaling.	Emergency vehicles, motorcycles, and some trucks.
Wig Wag Signal	A traffic signal with alternating flashing lights indicating a stop requirement.	Railway crossings, moving bridges, and fire station exits.

History of Wig Wags

The term “wig wag” originated in the 1850s, attributed to U.S. Army surgeon Albert J. Myer, who developed a signaling system that used flags. This system was designed to convey messages over distances, eventually evolving into various applications, including railroad signals and vehicle light systems.

Types of Wig Wags

Railroad Wig Wag

Railroad wig wags are traditional signals found at grade crossings. They feature a swinging disk that moves horizontally, indicating the approach of a train. This mechanism ensures that drivers and pedestrians are alerted in situations where visibility is limited. Although many wig wags have been replaced with modern signals, some remain in use, particularly in heritage railroads and museums. As of 2022, only 14 active railroad crossings in the U.S. still utilize wig wags, primarily located in California.

Wig Wag in Washing Machines

In the context of household appliances, a wig wag refers to a unique solenoid mechanism found in older belt-drive washing machines, particularly those manufactured by Whirlpool and Kenmore. This device was used from approximately 1950 to 1987 in the U.S. and was integral to the washing machine’s operation. Although now illegal to install, many of these machines were well-built and have survived as vintage items.

Automotive Wig Wag

In the automotive sector, wig wags are devices that control how a vehicle’s lights flash. They enhance visibility, particularly for emergency vehicles, by creating unique light patterns. Wig wag systems can alternate between high and low beams, ensuring that a vehicle is highly visible, especially in critical situations.

Wig Wag Signal

A wig wag signal functions as a traffic control device, often seen at locations where stopping is essential for safety. These signals use a combination of solid amber and alternating red lights to alert drivers of oncoming hazards, such as trains or emergency vehicles.

Technical Features of Wig Wags

Feature	Railroad Wig Wag	Wig Wag in Washing Machines	Automotive Wig Wag	Wig Wag Signal
Mechanism	Swinging disk signal	Solenoid mechanism	Light control system	Flashing lights system
Usage Period	1850s – present (limited)	1950 – 1987	Present (varies by state)	Present (varies by location)
Visibility	High (for trains)	Not applicable	High (for emergency vehicles)	High (for traffic control)
Installation	Fixed at railway crossings	Integrated into washing machines	Installed in vehicles	Fixed at traffic locations

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Conclusion

Wig wags are integral components in various fields, serving as signals for safety and communication. From their historical roots in military signaling to their modern applications in transportation and household appliances, understanding wig wags sheds light on their importance and functionality. Whether it’s a railroad signal or a device in a washing machine, wig wags play a vital role in enhancing safety and efficiency.

FAQ

What is a wig wag?
A wig wag is a signaling device used in various applications, including transportation and household appliances. In the context of railroads, it indicates the approach of a train, while in washing machines, it refers to a specific solenoid mechanism.

How does a railroad wig wag signal work?
A railroad wig wag signal operates by swinging a disk horizontally to alert drivers and pedestrians of an approaching train. This mechanism is crucial at crossings where visibility is limited.

Are wig wags still used today?
Yes, while many have been replaced by modern signals, some wig wags are still in use, particularly at heritage railroads and select locations in the U.S.

What is the function of an automotive wig wag?
An automotive wig wag controls the flashing patterns of a vehicle’s lights, enhancing visibility for emergency vehicles and ensuring they are noticed in critical situations.

Can wig wags be installed in modern vehicles?
Generally, wig wags are allowed only in emergency vehicles; however, regulations vary by state regarding their use in other vehicle types.

What types of washing machines used wig wags?
Wig wag mechanisms were commonly found in belt-drive washing machines produced by Whirlpool and Kenmore from 1950 to 1987.

Why were wig wags deemed illegal for new installations?
Wig wags have been phased out due to safety regulations and advancements in signaling technology, leading to their prohibition in new installations.

What does the term ‘wig wag’ mean in military terms?
In military terms, ‘wig wag’ refers to a signaling system using flags to convey messages over distances.

How many active wig wag signals are there in the U.S.?
As of 2022, there are only 14 active wig wag signals remaining in use for regular railroads in the United States, all located in California.

What are the safety applications of wig wag signals?
Wig wag signals are used to alert drivers and pedestrians at railway crossings, moving bridges, and emergency vehicle exits, ensuring safety in critical situations.