Abstract: A Morse code tutoring system: a computer with an appropriate program and a code practice oscillator interfacing to it. In one mode of operation, the operator uses a straight key to produce code in the oscillator which is monitored by the computer, and analyzed for quantitative elements of his "amateur accent", that is, those characteristic of his code that make it harder for another person to decode. In another mode, the computer generates code which is output by the oscillator, and the operator decodes it and feeds back to the computer the decoded message. In subsequent lessons, the code generated is enriched in those characters that he fed back erroneously.

Abstract: Apparatus for converting a train of code signals representative of a letter, number, or symbol to a visual display of such corresponding letter, number, or symbol. The train of signals includes individual signals of at least two distinct time durations, the length of the time durations being dependent upon the proficiency of the operator initiating the signals. In the signal converting apparatus, a clock signal of a preselected time duration is produced. The time relation of each of the signals in the train of signals is resolved in relation to the clock signal. A first signal is produced if the signal being resolved is less than the clock signal, and a second signal is produced if the signal being resolved is greater than the clock signal. An addressor receives the first and second signals and stores the signals to generate a given address dependent upon the particular first and second signals and the order those signals are received. The addressor produces a signal indicative of the given address.

Abstract: A code practice blinker light is to be used in conjunction with a tape or record player sending code. The output signal of the tape or record player drives the input base circuit of a transistor, the switching action thereof causing the closing of a series circuit including a lamp which flashes on and off in response to the input audio signal.