Translations for factory in French

Here are paragraphs from public domain books translated:

"You must know that my grandfather had two sons—my uncle Elias and my father Joseph. My father had a small factory at Coventry, which he enlarged at the time of the invention of bicycling. He was the patentee of the Openshaw unbreakable tire, and his business met with such success that he was able to sell it, and to retire upon a handsome competence.	Il faut que vous sachiez que mon grand-père a eu deux fils : mon oncle Elias et mon père Joseph. Mon père avait à Coventry une petite usine qu’il agrandit à l’époque de l’invention de la bicyclette ; il avait pris un brevet pour le pneumatique increvable Openshaw, et il fit de si belles affaires qu’il put revendre son brevet et vivre dans l’aisance.
The Adventures of Sherlock Holmes, by Arthur Conan Doyle	Les Aventures de Sherlock Holmes, de Arthur Conan Doyle