Abstract: A novel water craft, which may include a hull with a keel, having propulsion means extending below the water line. The propulsion means comprises a pair of flappers each adapted to oscillate through an arcuate path in a generally transverse direction with respect to the central longitudinal dimension of the watercraft. Means are operatively associated with the propulsion means for applying input force to the propulsion means. The flappers twist to form an angle of attack for providing forward thrust with respect to the longitudinal dimension of the watercraft while moving in both directions along the arcuate path.

Abstract: In a text processing device, provided is an improved tabulation function. The vertical positions of horizontal ruled lines dividing two rows are calculated based upon the intervals existing between these columns. If the row interval is expanded or changed, the horizontal ruled lines remain consistent in a predetermined relationship with a character string.

Abstract: An electronic typewriter has a function of making a rectangular frame, which is composed of a horizontal line and a vertical line. To make a frame in the course of the sequential input of characters, an operator moves the printing position to the upper left vertex of the frame that is to be printed, and then, the operator depresses a specific key, which is called frame key, when the printing position arrives at the upper left vertex of the frame that is to be printed. After the operator puts in characters or spaces that are to be inserted in the frame, the operator moves the printing point to the lower right vertex of the frame and the operator then depresses the frame key again. By the operations of twice depressing the frame key, the printing position data for making the frame is taken in. The electronic typewriter then calculates both the starting and ending positions of the segments that compose the frame.

Abstract: A plotting device for typewriters or office machines of similar construction which comprises a motor driven carriage; a record carrier; a print head; a ribbon in a cassette; a reversible, controllable drive motor for moving the record carrier up and down; the motor driven carriage being movable along the record carrier; the ribbon being housed within the carriage with a portion of the ribbon extending outside of the carriage for being contacted by the print head; the print head being operatively connected to the carriage so that the print head can strike the ribbon and produce a full set of alpha-numeric characters on the record carrier; an X-Y plotting mechanism equpped with styli and being disposed on the cassette; and a control system for moving the styli from a detent position into an operating position with respect to the record carrier.

Abstract: A recording apparatus capable of recording a graphical representation such as a bar graph, broken-line graph and a pie charat, and a succession of explanatory characters accompanying the graphical representation, such that the explanatory characters are recorded selectively in a first and a second direction. The apparatus includes an input device through which the explanatory characters are entered, a recording mechanism for recording the graphical representation and the explanatory characters on a recording medium and a device for selecting the first direction if a length of the succession of explanatory characters is equal to or smaller than a reference value, and selecting the second direction if the length is larger than the reference value. The second direction is determined so as to assure a sufficient space for recording the succession of characters.

Abstract: Several line drawing devices to permit drawing horizontal and vertical lines on typewriters are known. The fact that they are rarely encountered in practice, should be sufficient proof that they were not found to be satisfactory and greatly impede the typing process. These drawbacks are overcome by the invention in that the ribbon cassette is provided with a receptacle for a colored writing implement which, in one end position, resiliently rests on the record carrier so as to produce drawn lines and is arranged to be movable and arrestable in another end position to put it out of operation. A significant advantage resides in the fact that the colored writing implement can here be attached to the cassette at a location where the typing process is not interfered with. The colored writing implement can easily be exchanged by removing the ribbon cassette. The ribbon cassette together with the colored writing implement permits easy production of drawn lines in the horizontal, vertical or any other direction.