The Machine
NEMA uses 10 wheels, of which four are normal electrical rotors with 26 contacts at each end that are scramble wired in a way unique to each rotor type; one is an electrical reflector (like the Enigma's Umkehrwalze) with one set of 26 pairwise cross connected contacts; and the remaining five are "drive wheels", with mechanical cams that control the stepping of the rotors and the reflector. The wheels are assembled on an axle in pairs consisting of a drive wheel and an electrical rotor.
-
The four rotor pairs and the reflector
-
The rotor lodging with the cams and first rotor
-
Top view of a NEMA rotor pair. Electrical rotor "F."
-
Bottom view of a NEMA rotor pair. Drive rotor "18." Note the three stepping-control cams.
-
An Enigma rotor.
-
view of the right side of the machine with the port for the removable extra lamp pannel
The NEMA machine weighs about 10 kg and measures approximately 36×32×14 cm.
Read more about this topic: NEMA (machine)
Famous quotes containing the word machine:
“The cycle of the machine is now coming to an end. Man has learned much in the hard discipline and the shrewd, unflinching grasp of practical possibilities that the machine has provided in the last three centuries: but we can no more continue to live in the world of the machine than we could live successfully on the barren surface of the moon.”
—Lewis Mumford (1895–1990)
“I find it hard to believe that the machine would go into the creative artist’s hand even were that magic hand in true place. It has been too far exploited by industrialism and science at expense to art and true religion.”
—Frank Lloyd Wright (1869–1959)