Elijah D. Fulford's single trigger mechanism patent issued July 8th, 1902 - http://www.google.com/patents?id=OYdcAAAAEBAJ&printsec=abstract&zoom=4

Next edition of Elijah D. Fulford's single trigger mechanism issued January 12th, 1904 - http://www.google.com/patents?id=hr0rAAAAEBAJ&printsec=abstract&zoom=4

Kind Regards,

Raimey
rse