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Significant Innovations 1950s-70s

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The beginnings of pressure cookers and microwave ovens

The pressure cooker

When my husband and I set up home in 1962 we considered ourselves very modern to have a pressure cooker. Microwaves were not in anyone's thinking at the time, although they soon would be.

early pressure cooker with a lever to keep pressure constant

Early pressure cooker

How pressure cookers worked

Pressure cookers cooked food much more quickly than ordinary boiling would have done, because the cooking was under a higher pressure so that the water boiled at a higher temperature.

The most common form of pressure cooker produced this high pressure by trapping the steam using a tightly fitting lid complete with a special safety valve in it. This safety valve was held shut with a weight or spring of some sort. Once up to pressure the steam then escaped with a constant hissing sound.

How to use a pressure cooker

As the food cooked in steam not water, it was put on a low rack inside the cooker with a relatively small amount of water. We got used to how much water, as it was important that the cooker should not boil dry.

Pressure cookers were only really useful for the sort of cooking that was traditional done by boiling, e.g. vegetables. Vegetables cooked in this way were said to be particularly nutritious because the goodness did not dissolve out into cooking water. The cooker could of course be used with fat for frying without its lid, ie at normal pressure. So some people partly cooked meat at pressure and then browned the outside in fact afterwards.

The danger of pressure cookers

In some ways, pressure cookers were dangerous, because if the valve outlet got clogged up, the pressure would rise dangerously high and the whole cooker would explode. Nevertheless, we used ours a great deal. Potatoes of a size that would take half an hour to cook by regular boiling, would cook in only 6 minutes.

Why pressure cookers went out of favour

With the advent of microwave cookers, pressure cookers became redundant.

Microwave ovens appeared on the British market

I was in my twenties when the events and observations of these recollections occurred.

The 'magic' of a microwave oven

I first heard about the 'magic' way of microwave cooking sometime in the early 1960s. I was teaching at a school, and the husband of one of the other teachers was an engineer. He had come home from a conference where he had seen a demonstration. None of us teachers really believed it when we were told about it. Maybe, we thought, it might work on a small scale in a laboratory somewhere, but it couldn't possibly affect us.

How wrong we were. Microwave ovens were soon produced on a commercial scale. Many potential customers were put off just as we teachers had been because it was simply 'impossible'. After all, we had used hobs, gas ovens or coal-fired kitchen ranges all our lives, as had our parents and grandparents before us.

Soon, though, a few brave souls started buying microwave ovens.

Problems with early microwave ovens

These early microwave ovens were not without their problems, particularly as they had no turntables, so causing hot spots in the food. However, they rapidly became more sophisticated, and the news spread so that microwave ovens became, for most of us, an indispensable piece of kitchen equipment. Yet even as I write, I know older people born in the 1920s and before who still won't touch them.


If you can add anything to this page or provide a photo, I would be pleased if you would contact me.



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