Clauses Pretest

We take zippers for granted, but think about how much easier our lives have become since zippers were invented slightly more than 100 years ago.

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We take zippers for granted, but think about how much easier our lives have become since zippers were invented slightly more than 100 years ago.

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The first zipper was patented by Whitcomb L. Judson, an American inventor, in 1893.

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Judson’s zipper was called a clasp locker, and it had a series of hooks and eyes that fastened together with a slider.

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Judson’s zipper was called a clasp locker, and it had a series of hooks and eyes that fastened together with a slider.

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Today’s zipper also has a slider, but it fastens together with rows of snugly fitting teeth.

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These rows remain fastened until the slider is pulled back, unlocking that teeth.

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The toothed zipper that we use today was invented by Gideon Sundback in 1913.

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The word zipper was not used until 1922, when a company marketed galoshes that were called Zippers.

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They were given that name because their sliding fasteners could close so quickly.

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