if two keys are struck

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Journal of the Franklin Institute‎
Franklin Institute (Philadelphia, Pa.) 著 - 1890
341 ページ

With the Hammond printing form there cannot be a collision between the types, whilst in machines of the class above-named, if two keys are struck ...

How to become expert in typewriting: A complete instructor designed ...‎
Lovisa Ellen Barnes 著 - 1890 - 160 ページ
2 ページ

If two keys are struck at the same time, the type will clash and the type bars may be bent, throwing the letters out of alignment; that is, causing them to ...

Brown & Holland news‎
Brown & Holland Shorthand News Co 著 - 1885
146 ページ

Thus, if two keys are struck at the same time they will cause two types to clash in their attempt to reach the same spot. The depression of the key first ...

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