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The pole lathe of 1800 is a wood turning tool that uses a pole as a return spring for the treadle (foot pedal).

Pole Lathe

The pole lathe of 1800 is a wood turning tool that uses a pole as a return spring for the treadle (foot…

"Singer sewing-machine. a is the frame and cloth-plate or bed-plate; b, arm; c, treadle; e, pitman; d, main driving-wheel; f, band; g, small driving-wheel attached to shaft ... j, take-up lever with roller and stud; k, presser-bar carrying presser-foot; l, needle-bar; m, spool-pin; ... t, drawers." -Whitney, 1911

Singer Sewing Machine

"Singer sewing-machine. a is the frame and cloth-plate or bed-plate; b, arm; c, treadle; e, pitman;…