Abstract: An electronic apparatus having a printer which can print at a speed according to a key operating speed of the user. A keyboard section KB includes: numeric keys for the user to input numeric data; function keys such as four-arithmetical operating keys such as addition "+", subtraction "-", multiplication ".times.", division ".div.". and total "="; and function keys such as clear key "C", memory key "M+", and the like which are set so as not to perform the printing, where the printing speed of the printer PR is variable. In an arithmetic computation unit AC, a period of time which is required after the numeric key of the keyboard KB was first operated until the function key accompanied with the printing operation is operated is divided by the number of key operation times, obtaining the average value of the key operation time intervals. The printing speed of the printer PR is controlled in accordance with the average operation time interval.

Abstract: Equipment with a printer, such as a desk top calculator with a printer, is provided with a special key for instructing printing of a graphic pattern. By depressing the special key, input numeric data and/or an operation result are printed in a graph such as a bar graph which represents the magnitude of the data.

Abstract: An electronic equipment with a serial printer unit having a print head includes a device for laterally moving the print head on a print paper and a detector for detecting a home position of the print head, a carriage return operation is inhibited if the printer unit and paper feed are in a non-print mode when the electronic equipment is turned on.

Abstract: An electronic apparatus such as an electronic desk-top calculator, word-processor or electronic typewriter having a display unit and a data input keyboard with plural operating modes in which one of a mode display format and a regular display format is selectively displayed on the single display unit. This arrangement provides a low-cost electronic apparatus using a general-purpose display. The display may return automatically to a regular display after a predetermined period of time has elapsed following a mode display, thereby providing a convenient electronic apparatus without excessive operations.

Abstract: A power supply control device is usable in a battery-driven electronic device, in which a power down mode is adopted when the battery is mounted.

Abstract: In a talking calculator, a condition memory (F1-F4) causes selection of one kind of voice information sound quality, such as male or female, whereby, for example, a male voice announces positive numbers and a female voice announces negative numbers.

Abstract: An electronic apparatus comprises a left-hand unit and a right-hand unit mutually connected to constitute a foldable structure, in which a display device is provided in one of the units while an aperture is provided in the other to enable observation of the display device even in the folded state of the apparatus. Operational keys are provided on the other unit or on both units to enable operation of the apparatus in the open and/or folded position thereof.

Abstract: Electronic equipment has a switch for selecting a internal power supply contained therein or an external power supply connected through a connecting terminal and detecting means for detecting the switching of the switch. When the switching of the switch is detected, at least one function of the electronic equipment is inhibited.

Abstract: An electronic appliance provided with an output section to produce, as an output, input data introduced from an input section an operational result of the input data, and a power source section to supply electric power to the output section, wherein the appliance is further provided with a detection device for detecting abnormality in the output operation of the output section based on a decrease in the power supply from the power source section or an abnormality in the output operation of the output section based on the power decrease, thereby inhibiting data input from the input section when the decrease in the power or the abnormality is detected.

Abstract: An electronic apparatus capable of producing a voiced output representing various data input thereto and the results of operations on the input data includes a system for inhibiting the voiced output of data that is unnecessary to the operator. For example, when input data overflows the apparatus, a voiced output indicative thereof is inhibited. As another example, when input data or the result of an operation is a whole number, a voiced output indicative of decimal point location is inhibited. As still another example, if key entries are made too rapidly to permit a voiced output, such output is inhibited.

Abstract: To miniaturize an electronic device such as an electronic table computer provided with a printer, the display part and printing part of the device are united together to form a unitary component. Wiring of signal lead line for driving the display and printing part is disposed on a base board. Furthermore, heat generated from the printing part is used to record on the heat sensitive recording paper.

Abstract: In a printing hammer driving system, there is provided a character-bearing member having a plurality of identical characters disposed in mutually offset relationship in each of lines. The characters in each of the lines differ from those in any other line. A group of hammers is disposed in opposed relationship with the character-bearing member for impacting the characters thereon. A group of driving circuits is connected to the group of hammers for driving respective ones of the hammers. A group of gates is connected to the inputs of the group of driving circuits for selecting the hammers. Each of the gates has at least two input terminals. Memory means are provided which each have the output thereof connected to one of the input terminals of each gate for storing print digit information. Selector means are provided which each are connected to the other input terminal of each gate for selecting one or more of the gates.

Abstract: There is provided an electronic calculator with a printer which is capable of feeding any desired number of lines of a recording medium by keeping the operation execution instructin key depressed, thereby to realize both improvement of operability and elimination of the paper feed key. Also, even if said instruction key is not kept pushed down, it is possible to feed more than three lines of the recording medium by a one-tough operation. Further, by previously setting the quantity to be fed before operation, it is possible to automatically stop feed of the recording medium, which is fed by the key operation, upon feed of the predetermined quantity of the recording medium. Moreover, space feed may be automatically or artificially eliminated to improve the continuous printing output speed.