A Brief History of Residential Smoke Alarms
Smoke alarms, also known as smoke detectors, have a relatively recent history. The first automatic electric fire alarm can be attributed to Francis Robbins Upton, an associate of Thomas Edison, who patented the invention in 1890. However, as we understand it today, it was not a smoke alarm; it was more of a heat detector.
The evolution of smoke detection technology took a significant leap forward in the 1930s with the Swiss physicist Walter Jaeger's attempt to invent a sensor for poison gas due to the widespread fear and potential for chemical warfare that had been a significant part of World War I. The use of poison gas during the war demonstrated its potential for massive casualties and the disruption it could cause to both military forces and civilian populations.
An accidental discovery that smoke particles could also disrupt the current flow in his ionization chamber became the basis for the modern smoke detector. This device has become a standard safety feature in homes and buildings worldwide and has saved countless lives through early fire detection.
Before the 1960s, fire detection systems were primarily used in commercial and industrial settings. They were often too expensive and bulky for use in residential homes. Duane D. Pearsall and Stanley Bennett Peterson's invention changed this, making smoke detection affordable and practical for widespread home use.
Duane D. Pearsall, who had a background in electronics and aerosol research, and Stanley Bennett Peterson, an electrical engineer, worked together on the development of the SmokeGard 700.
The most significant impact of Pearsall and Peterson's invention was transforming the smoke detector from a luxury item to a standard household safety device. They designed a compact, mass-produced unit that dramatically reduced the cost. By creating the SmokeGard to run on a traditional house current, the device became more convenient for everyday use. This feature meant that homeowners could plug their smoke detectors into their home electrical systems, avoiding the need for expensive or hard-to-find batteries, a significant barrier at that time.
Meanwhile, advancements in battery production and the wider availability of affordable batteries changed the landscape of portable electronic devices. By the late 1960s and early 1970s, batteries became more readily available in retail stores, and the cost of batteries began to decrease due to economies of scale and advancements in battery technology. This greater accessibility and affordability of batteries coincided with the introduction of battery-operated smoke alarms, facilitating their adoption in residential settings.
In 1970, BRK, later known as First Alert, officially introduced battery-operated smoke alarms, marking a significant advancement in fire safety. Battery-operated units were less expensive to manufacture and purchase than their electric counterparts. This made them accessible to a broader population segment, ensuring that more homes could be equipped with life-saving technology.
Unlike hardwired smoke alarms, which require professional installation into a home's electrical system, battery-operated smoke alarms could be easily installed by homeowners themselves. This reduced costs and encouraged wider use since homeowners could readily place alarms without special skills or tools in recommended locations.
Conclusion
Research consistently indicates that working smoke alarms significantly reduce the risk of fire-related fatalities in homes. Recognizing the potential for these devices to save lives, fire safety organizations, insurance companies, and government agencies began aggressively promoting battery-operated smoke alarms. This included public service announcements, educational programs, and even subsidies or giveaways in some communities. Building codes were also updated to require smoke alarms in new construction and, in many cases, in existing homes upon sale or as part of renovations.