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Scientific American, Vol. 65, No. 3 (1891) (1891)
leaf 4
the rider. connected by belt in the usual way with a sprocket either arm in engagement with the wrench body. This invention has been patented by Mr. Allan H. This improvement has been patented by Mr. C. A. wheel on the pedal shaft, and the guard over the Lessells, of No. 18 Balmoral Road, New… … © 1891 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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