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By unknown artist, Whitworth c. 1846
By unknown artist, Whitworth c. 1846
The Firs, now the Chancellors Hotel & Conference Centre
The Firs, now the Chancellors Hotel & Conference Centre
The grave of Sir Joseph Whitworth Bart. In the grounds of St Helen's Parish Church, Darley Dale, Derbyshire (Whitworth's grave is the central tomb)
The grave of Sir Joseph Whitworth Bart. In the grounds of St Helen's Parish Church, Darley Dale, Derbyshire (Whitworth's grave is the central tomb)
12-pounder Whitworth rifle
12-pounder Whitworth rifle
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Screw thread, used to convert torque into the linear force in the flood gate. The operator rotates the small vertical bevel gear in the center. Throug
Screw thread, used to convert torque into the linear force in the flood gate. The operator rotates the small vertical bevel gear in the center. Through mechanical advantage this causes the horizontal bevel gears (at far left and far right, with threaded center holes) to rotate. Their rotation raises or lowers the two long vertical threaded shafts - as they are not free to rotate.
Different (and incompatible) threads including (from left) M12 left hand, standard M12, M12x1.5 (fine), M12x1.25 (fine), 1/2" UNF, 1/2" UNC, 1/2" BSW,
Different (and incompatible) threads including (from left) M12 left hand, standard M12, M12x1.5 (fine), M12x1.25 (fine), 1/2" UNF, 1/2" UNC, 1/2" BSW, and 1/2" BSF
Camshaft cover stud threaded 1⁄4-20 UNC (left, for aluminium cylinder head) and 1⁄4-28 UNF (right, for steel nut; from a 1960s Jaguar XK engine)
Camshaft cover stud threaded 1⁄4-20 UNC (left, for aluminium cylinder head) and 1⁄4-28 UNF (right, for steel nut; from a 1960s Jaguar XK engine)
The three diameters that characterize threads
The three diameters that characterize threads