Snyer's elastic clutch for 1 1/2" shaft patented in 1887 with slot actuating gear, patented in 1892; made in 1908. Snyer's elastic clutch for 1 1/2" shaft patented in 1887 with slot actuating gear 1908
Example of a coil friction clutch, size D.4. for 1 1/4" shaft:c.1895 Example of a coil friction clutch 1893-1902