US Patent No. 3,843, granted December 4, 1844 to Horace Barbour and John Gleason of Lowell, Massachusetts, for a self-stripping card for carding engines. A revolving wire brush is brought by a cam into contact with the main cylinder, or with the revolving top cards, to strip and clean them while in motion, without stopping the machine or hand labor. The patent includes a drawing sheet of the carding engine (Figs. 1-5), the specification and claims, including a claim for use with Crane's self-stripping carding machine.