Thomas Humber was a English engineer and cycle manufacturer who developed and patented a safety bicycle (1884) with a diamond-shaped frame and wheels of similar size. It became a pattern for subsequent machines. Humber made many other improvements to bicycles. About 1868 he founded Humber Cycles, the bicycle manufacturing business at Beeston, Nottinghamshire later owned by Humber & Co Limited.

A safety bicycle is a type of bicycle that became very popular beginning in the late 1880s as an alternative to the penny-farthing and is now the most common type of bicycle. Early bicycles of this style were known as safety bicycles because they were noted for, and marketed as, being safer than the high wheelers they were replacing. Even though modern bicycles use a similar design, the term is rarely used today and is considered obsolete outside circles familiar with high wheelers.