Code-controlled teleprinter having a type cylinder which can be adjusted by means of a stepping motor

Claim 2

A code-controlled teleprinter for an n-digit code including a type carrier, a stepping motor for rotatably adjusting said type carrier in either direction, and a position comparing system comprising an n-digit electronic binary counter, means for permutating said n-digit binary counter including a timing disc mutually rotatable with said type carrier and having stepping marks carried circumferentially thereon, means for reading the stepping marks and producing stepping pulses in response thereto connected to said n-digit binary counter, and means controlling rotation of said stepping motor in one direction in response to a binary counter count of less than half the character stock on said type carrier and in the other direction in response to a count of more than half of the characters on said type carrier, a synchronizing mark carried on said disc and associated with a frequently occurring predetermined character, means for reading said synchronizing mark and producing a synchronizing pulse in response thereto connected to said n-digit binary counter for setting said binary counter to the n-digit code associated with said predetermined character when said synchronizing mark is read.

Claim 3

A code controlled teleprinter for an n-digit code including a type carrier, a stepping motor for rotatably adjusting said type carrier in either direction, and a position comparing system comprising an n-digit electronic binary counter, means for permutating said n-digit binary counter including a timing disc mutually rotatable with said type carrier and having stepping marks carried circumferentially thereon and means for reading the stepping marks and producing stepping pulses in response thereto connected to said n-digit binary counter, a synchronizing mark carried on said disc and associated with a frequently occurring predetermined character, means for reading said synchronizing mark and producing a synchronizing pulse in response thereto connected to said n-digit binary counter for setting said binary counter to the n-digit code associated with said predetermined character when said synchronizing mark is read, an input register for receiving incoming n-digit codes, a decoder connected to said input register for recognizing certain special function codes which are not associated with characters to be printed, an electronic comparing device for comparing incoming codes with position codes stored in said n-digit binary counter, blocking gates connected between said decoder and said comparing device and responsive to the operation of said decoder to inhibit operation of said comparing device and apply the code of the predetermined character to said register so that control of said motor is rendered dependent only on said synchronizing pulse so that said type carrier and said n-Digit binary counter are synchronized upon the receipt of special function codes.

Claim 4

A code controlled teleprinter for an n-digit code including a type carrier, a stepping motor for rotatably adjusting said type carrier in either direction, and a position comparing system comprising an n-digit electronic binary counter, means for permutating said n-digit binary counter including a timing disc mutually rotatable with said type carrier and having stepping marks carried circumferentially thereon and means for reading the stepping marks and producing stepping pulses in response thereto connected to said n-digit binary counter, a synchronizing mark carried on said disc and associated with a frequently occurring predetermined character, means for reading said synchronizing mark and producing a synchronizing pulse in response thereto connected to said n-digit binary counter for setting said binary counter to the n-digit code associated with said predetermined character when said synchronizing mark is read, an input register for receiving incoming n-digit codes, a decoder connected to said input register for recognizing certain special function codes which are not associated with characters to be printed, an electronic comparing device for comparing incoming codes with position codes stored in said n-digit binary counter, blocking gates connected between said decoder and said comparing device and responsive to the operation of said decoder to inhibit operation of said comparing device and apply the code of the predetermined character to said register so that control of said motor is rendered dependent only on said synchronizing pulse so that said type carrier and said n-Digit binary counter are synchronized upon the receipt of special function codes.

Claim 5

A teleprinter according to claim 2, comprising an additional decoder connected between said n-digit binary counter and said electronic comparing device and operated by other predetermined codes which are ahead of said special function codes and not to be printed, an auxiliary timing pulse generator operated by said additional decoder and connected to advance said n-digit binary counter without advancing said type carrier in order to avoid the provision of gaps in said type carrier associated with said other predetermined codes.