1) Odometer 
The cyclometer was a cryptologic device designed, `probably in 1934 or 1935,` by Marian Rejewski of the Polish Cipher Bureau`s German section (BS-4) to facilitate decryption of German Enigma ciphertext. ==History== The cyclometer was used to prepare a catalog of the length and number of cycles in the `characteristics` for all 17,576 positions...
instrument for measuring revolutions of a wheel
• (n.) A contrivance for recording the revolutions of a wheel, as of a bicycle.
Cy·clom'e·ter noun [ Cyclo- + -meter .] A contrivance for recording the revolutions of a wheel, as of a bicycle. 
an instrument that measures circular arcs. · a device for recording the revolutions of a wheel and hence the distance traversed by a wheeled vehicle; odometer.