When was the microwave invented? Who invented it? How did it end up becoming one of the most essential elements in a kitchen? As pros in all things related to microwaves, Don Fuller’s Appliance Repair is here with a rundown of the microwave’s brief history, from its initial invention to today.
Let’s go back in time and see just how this everyday kitchen tool came to be.
It All Started With a Melted Chocolate Bar
The year was 1945. World War II was winding down, and science and engineering were focused on repurposing wartime technology for domestic needs. American engineer Percy Spencer was working at a company called Raytheon, tinkering with radar equipment called a compact cavity magnetron tube (originally used to detect enemy aircraft) which emitted microwave signals. He was testing how it worked when he noticed something odd: the chocolate bar in his pocket had somehow melted.
Spencer started experimenting with microwave radiation in the Raytheon laboratories, theorizing that the microwaves from an active radar could be the reason behind his melted snack. He put popcorn kernels near the magnetron and watched them pop, and then came eggs, which exploded. One thing was clear, though—microwaves could cook food quickly. This was enough for Spencer to start working on the very first microwave oven model.
The First Microwave Oven for Commercial Use
Soon after Spencer’s discovery, Raytheon filed the first patent for microwave cooking in the United States, called “Method for treating foodstuffs.”
This model was used in a Boston restaurant in 1946 for testing. A year later, the first commercial microwave oven called the “Radarange” rolled out, available to purchase. However, it was nothing like the modern microwave ovens we know today.
For starters, the equipment stood nearly six feet tall, weighed over 700 pounds, and cost about $5,000 at the time (around $70,000 today). It also needed water-cooling and industrial-grade power. So, naturally, only big businesses like restaurants and hospitals bought them.
Homeowners? Not quite yet.
How the Microwave Oven Made Its Way to Homes
In 1955, a company called Tapan tried its hand at introducing a microwave oven for residential use, though there was a limit on the allowed microwave purchases. It was a step in the right direction, but still expensive. Plus, this rough model was a bulky metal box that didn’t quite fit in well in your everyday kitchen.
In 1967, Amana (which Raytheon had acquired by then) released the first residential countertop microwave oven for home kitchens. This one came with new features and was compact, user-friendly, and most importantly, affordable. It cost $495, which made microwave technology for quickly heating food much more accessible to homeowners and many industries.
The Evolution of Microwave Technology
The microwave heating technology didn’t just stay the same after it hit the home market. With technological advancements, microwaves got smarter, safer, and better at their job.
Early models didn’t have turntables, which meant the food inside got unevenly heated. In the mid-60s, Sharp Corporation introduced a microwave with a built-in turntable, solving the whole “hot-spot” problem.
Soon after, digital displays and push-button programming came in. Then inverter technology showed up, which allowed for more precise cooking instead of just toggling between “blast” and “off.” Add sensor cooking, child safety locks, and sleeker designs, and you’ve got the modern microwave: fast, reliable, and safe for everyday use.
Today’s microwaves can now defrost chicken, steam veggies, and pop popcorn without breaking a sweat. And that’s all thanks to decades of trial, error, and a melted chocolate bar.
The Microwave Today: A Must-Have in OKC Kitchens
Fast-forward to now, and microwave ovens are practically non-negotiable in kitchens. A large majority of American households own microwave ovens, and for a good reason. They’re fast, efficient, and easy to use when heating cold food.
They also look better now, with stainless finishes, built-in options, combo ovens with convection oven features, and even smart features that let you control them from your phone. Needless to say, the microwave has definitely come a long way.
But They’re Not Invincible
As reliable as modern microwaves are, they’re unfortunately not immune to wear and tear. After years of constant use, even the best ones can start acting up.
Some of the most common issues we’ve seen in Oklahoma City kitchens include:
- Microwave won’t turn on: It could be anything from a blown fuse to a faulty door switch.
- Turntable not spinning: This is often caused by a broken motor or damaged roller guide.
- Sparks inside the microwave: Usually from metal objects, a worn waveguide cover, or a damaged diode.
- Microwave oven heats unevenly or not at all: This is likely a problem with the magnetron or high-voltage components.
While it might be tempting to fix it yourself, some of these repairs can be dangerous without the right tools or experience. In such cases, you can always call Don Fuller’s Appliance Repair for professional microwave repair services.
Fun Facts About Microwaves
A nuclear-powered cargo ship once had a microwave before most homes did
Long before the average homeowner had access to a microwave oven, a nuclear-powered cargo ship called the NS Savannah (launched in the 1950s) had one on board. It had one of the earliest commercial microwave models installed in the ship’s galley.
Microwaves work by shaking water molecules
At the heart of microwave cooking is electromagnetic radiation—specifically, microwaves in the 2.45 GHz frequency range. Those waves target water molecules in your food and make them vibrate really fast. That rapid movement generates heat from the inside out, which is why your food cooks and heats so quickly.
Two metal plates are the building blocks of a magnetron
The magnetron, which is the part of a microwave oven that produces the heating waves, contains two metal plates inside a vacuum tube. These plates help generate the microwave energy by bouncing electrons around.
Microwaves aren’t great for certain food textures
If you’ve ever tried to make anything crispy in a microwave, you’ve probably been disappointed. That’s because the way microwaves heat—mainly through water—doesn’t allow for dry, high-heated methods like deep frying. So while they’re perfect for heating soups or leftovers, they’re not replacing your fryer anytime soon.
Select models can cook large quantities of food (but still have their limits)
Microwaves made for commercial kitchens can handle large quantities of food at once. They have higher wattage, larger cavities, and sometimes even dual magnetrons. But even the largest microwave has its limits—food that’s piled too high or packed too tightly can still come out half-cold.
Dielectric materials are what make safe containers work
Ever wonder why some containers are microwave-safe and others aren’t? It comes down to dielectric materials and dielectric heating. This refers to materials that can absorb microwave energy and convert it into heat without breaking down or catching fire. Glass, certain plastics, wax paper, and ceramics usually fall into this category.
Microwaves can be more efficient than you think
According to labor statistics reported by the US Department of Energy, microwave ovens use significantly less energy than conventional ovens, especially for smaller portions. That makes them not only a convenience but also a budget-friendly choice for folks trying to cut down on their electricity bills.
Some Tips to Help Your Microwave Last Longer
Want to get the most out of your microwave? Check out these quick tips we often share with our Oklahoma City customers:
- Don’t run it without any food inside. Microwaves need something to absorb the waves. Running them empty can damage the magnetron tube.
- Keep the interior clean. Dried food splatter can absorb energy and lead to arcing (aka sparks).
- Use microwave-safe containers only.
- Avoid slamming the microwave door as it can wear out the latch switches over time.
- Schedule occasional checkups, especially for commercial units that get heavy use.
Call Don Fuller’s Appliance Repair for Reliable Microwave Repairs
Homeowners have owned a microwave for many years, enjoying its benefits. This is all thanks to Raytheon engineer Percy Spencer, who changed the kitchen game with his invention
But even modern miracles can run into issues. If your microwave is having problems like microwave power issues and abnormally slow cook times, our team is happy to help. Contact us, and we’ll get your microwave back in working order in no time!
