17th-century coach spring in Lisbon Carriage Museum The earliest known leaf springs began showing up on carriages in France from the mid-17th century in the form of The 2-element elbow spring (because the illustrated case in point from Lisbon), and later migrated to England and Germany,[six] showing on the carriages https://minivariablefrequencydriv88753.actoblog.com/36155358/how-axle-assembly-can-save-you-time-stress-and-money