Clever inventions that came out of the cold

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Great inventors look at the ordinary and see the extraordinary. They see freshly caught fish freezing in the Arctic air, and think of a new way to preserve food. They observe a banana boat being unloaded, and get an idea for a better way to move skiers up a mountain. They look at a wheat-harvesting machine, and imagine a revolutionary way to move snow.

But inventing something is rarely as simple as getting a great idea and patenting it. Many inventors endure years of struggle and failure before they succeed. Here are some of their stories:

FROZEN FOOD

Clarence Birdseye was a college dropout working as a naturalist for the United States government in the Arctic during the 1920s. While stationed in the far north, he noticed that freshly caught fish froze quickly in the extreme cold. And when the frozen fish was thawed and cooked much later, it still tasted fresh. The quick freezing was preventing the formation of large ice crystals, and that helped to preserve the fresh flavor of the fish.

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When he returned to New York, Birdseye founded his own company, Birdseye Seafoods Inc., and started packaging frozen fish fillets to sell. In 1924, he invented a new process for packing fish or vegetables in cartons, then very quickly freezing the contents between two flat, refrigerated surfaces under high pressure.

Birdseye still had to figure out a way to get the frozen food to customers before it melted. Over the next decade, he created refrigerated display cases for grocery stores and leased refrigerated boxcars to transport the frozen foods by train. The frozen-food industry was born.

C.A. Swanson & Sons began producing frozen turkey and chicken pot pies in 1951. But in 1954, the company faced a crisis. Company executive Gerald Thomas had to figure out what to do with 520,000 pounds of unsold Thanksgiving turkeys. The birds had been crisscrossing the country on 10 refrigerated boxcars. There was no warehouse space to store them.

Then Mr. Thomas remembered the compartmentalized aluminum trays then being introduced on airplanes to serve meals. Two dozen women used ice-cream scoops to fill the trays with food for the first order of 5,000. The frozen "TV dinner" featured turkey, corn-bread stuffing and gravy, buttered peas, and sweet potatoes. It cost 98 cents. Swanson sold 10 million of its frozen dinners that year.

An interesting note: Since most people didn't own freezers at that time, most of the first frozen dinners were bought and cooked the same day.

THE ZAMBONI

When Frank Zamboni opened one of southern California's first ice-skating rinks in 1940, he found he had a problem. It wasn't easy keeping the sheet of ice smooth. First, a tractor had to pull a scraper along the ice. Then, three or four workers scooped up the shavings, sprayed water over the surface, squeegeed it clean, and let the water refreeze. It could take as long as an hour.

Mr. Zamboni, who had worked on cars and built refrigerators before opening his ice-skating rink, wondered whether one machine could do all those things at once.

For almost 10 years, he tried and failed to invent such a machine. Finally, in 1949, he built his first successful ice-resurfacing vehicle.

A year later, Olympic skating star Sonja Henie's traveling ice show visited Zamboni's rink. She saw his machine in action and ordered one on the spot. He built it on the body of an Army jeep left over from World War II. Today, you can expect to find at least one Zamboni at every indoor ice-skating rink.

One machine can now shave, wash, resurface, and squeegee the ice all at the same time. What used to take an hour and a crew of three or four now takes one worker a matter of minutes.

Zamboni's inventiveness didn't stop there. He also created a machine to suck up water from AstroTurf used in sports stadiums. Another machine of his can remove the painted lines from AstroTurf, so the same field can be used for many sports.

SKI LIFT

Skiing is fun. But would you climb a mountain all day just to zip right back down?

That's what early downhill skiers had to do. They would trudge up a mountain with their skis over their shoulders or on their feet. Skiers strapped pieces of seal skin to the bottom on their skis to keep from sliding backward down the mountain. (The slick fur let them slide the ski forward, but the hairs would dig into the snow when the ski moved backward, giving the skier a grip on the snow.)

Then, in 1933, Wallace "Bunny" Bertram installed a long loop of continuously moving rope up a hill on a farm in Woodstock, Vt. The rope was powered by a Model-T Ford automobile engine. "Tow ropes" had previously been installed in Canada (1933) and Zurich, Switzerland (1932), but this was its first appearance in the United States.

Skiers grabbed onto the rope and were pulled up the mountain on their skis. It was tiring for skiers and tough on mittens, but now American skiers could enjoy many more runs down a mountain in a single day.

A few years later, the rope was replaced by an overhead cable. Now skiers could lean against a metal hook that pushed them up the mountain instead of their being pulled by a rope.

In 1936 came the first chairlift, in which skiers sat suspended in the air. (See illustration above.) An engineer named James Curran got the idea for the chairlift while looking at a cable used to unload bananas from freighter ships. The new chairlift could carry about 450 skiers an hour up a mountain.

SNOWBLOWER

Growing up on a dairy farm in Quebec, Ontario, in Canada, Arthur Sicard saw just how inconvenient snow-covered roads could be. His family couldn't get milk to market when deep snow made the roads impassible. Snowplows were available, but was there a better way?

As a teenager, Arthur also saw a machine called a thresher being used to harvest wheat. The thresher used rotating blades. He wondered if a similar machine could clear snow from country roads. He set out to build such a contraption. To make one that worked took him three decades.

It wasn't until the winter of 1925 that Mr. Sicard developed a snowblower that worked. That year, residents of Montreal saw a strange four-wheel-drive truck rumbling through the streets of the city.

That first snowblower had three sections: the truck chassis, two adjustable chutes, and a motor to run it. In place of its front bumper were two rotating blades in a housing with a scoop in front. The driver could clear and toss snow into the back of the truck or throw it more than 90 feet away. Instead of pushing the snow aside, the way plows did, the new machine could cart it off or throw it well out of the way.

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