Abstract: A mechanical device to be easily placed and removed over the margin rod of a key operated machine and having motion transfer levers which mechanically couple certain of its keys to other corresponding keys of the machine. The device is suitable for providing automatic carriage return after the space bar is activated within the margin zone, thus providing for improved alignment of the right margin, compression of the typed information, and increased typing speed.

Abstract: A recording apparatus capable of recording a graph according to graphic pattern data representative of a pattern of the graph, and graph data representative of values to be presented in the graph. The apparatus includes a control device for effecting and controlling relative movements between recording instrument and medium, a setting device for determining a maximum X-axis recordable range and a maximum Y-axis recordable range, a checking device for judging if an X-axis plotting range and a Y-axis plotting range which are necessary to record the graph exceed the X-axis and Y-axis recordable ranges, respectively, and an indicator for indicating the axis along which a plotting area defined by the X-axis and Y-axis plotting ranges extends beyond a maximum recordable area defined by the maximum recordable ranges.

Abstract: A printer provided with a margin setting mechanism is disclosed which has a printing head for writing information on a recording medium, a pulse motor for scan-driving the head, a detector for detecting the position of the head to put out a detection signal, and a control for receiving a phase signal applied to the pulse motor and the detection signal and putting out a signal to reverse the moving direction of the head when receiving both of said phase signal and detection signal.

Abstract: In an impact typewriter/printer using a daisy wheel typefont a stepper motor for rotating said daisy wheel for character selection purposes and microprocessor facilities for controlling said stepper motor, means are provided for generating tones signalling the occurrence of predetermined events to be brought to the attention of the typist. For that purpose, the microprocessor facilities are used to detect and identify the occurring event and then generate a tone of a predetermined frequency by moving said stepper motor back and forth at given rates whereby the daisy wheel typefont is made to vibrate the surrounding air fluid and generate the acoustical tone.

Abstract: A recording device is disclosed according to which writing information is recorded and the writing position in which the record head writes the information on a recording medium is detected. A discriminator determines the width of the recording medium loaded in the device, and a controller responsive to the discriminator and the detector controls the movement of the record head.