<P> Having some money saved and , still wanting to be an inventor as opposed to a `` medicine man '' , Colt made arrangements to begin building guns using proper gunsmiths from Baltimore , Maryland . He abandoned the idea of a multiple barreled revolver and opted for a single fixed barrel design with a rotating cylinder . The action of the hammer would align the cylinder bores with the single barrel . He sought the counsel of a friend of his father , Henry Leavitt Ellsworth , who loaned him $300 and advised him to perfect his prototype before applying for a patent . Colt hired a gunsmith by the name of John Pearson to build his revolver . Over the next few years Colt and Pearson fought over money , but the design improved and in 1835 Colt was ready to apply for his U.S. patent . Ellsworth was now the superintendent of the U.S. Patent Office and advised Colt to file for foreign patents first as a prior U.S. patent would keep Colt from filing a patent in Great Britain . In August 1835 , Colt left for England and France to secure his foreign patent . </P>
<P> Having some money saved and , still wanting to be an inventor as opposed to a `` medicine man '' , Colt made arrangements to begin building guns using proper gunsmiths from Baltimore , Maryland . He abandoned the idea of a multiple barreled revolver and opted for a single fixed barrel design with a rotating cylinder . The action of the hammer would align the cylinder bores with the single barrel . He sought the counsel of a friend of his father , Henry Leavitt Ellsworth , who loaned him $300 and advised him to perfect his prototype before applying for a patent . Colt hired a gunsmith by the name of John Pearson to build his revolver . Over the next few years Colt and Pearson fought over money , but the design improved and in 1835 Colt was ready to apply for his U.S. patent . Ellsworth was now the superintendent of the U.S. Patent Office and advised Colt to file for foreign patents first as a prior U.S. patent would keep Colt from filing a patent in Great Britain . In August 1835 , Colt left for England and France to secure his foreign patent . </P>
when was the revolver with interchangeable parts invented
when was the revolver with interchangeable parts invented
1835
1835