Complex sentence: On 23 February 1918, Arthur Scherbius with E. Richard Ritter applied for a patent for a ciphering machine that used rotors and founded the firm of Scherbius & Ritter.
Split into simpler sentences: On 23 February 1918, Arthur Scherbius applied for a patent for a ciphering machine that used rotors. Scherbius and E. Richard Ritter and founded the firm of Scherbius & Ritter.