Abstract: A 3-D modeling system is provided for reducing design costs an efficient drawing checking operation. A number of CAD units and a server are connected through network and can communicate. The CAD unit includes an input device including a keyboard, a mouse device and the like, a computer, forming the center of the system, and a display device. The server stores a working process database including working process information. When checking a drawing for a 3-D model, the computer recognizes the shape of the 3-D model, divides the model into elements based on the shape recognition and determines an optimum working requirement for each element from the working process information. After the determination of the working requirement, if a correction is necessary, a message indicating the need for correction is displayed.

Abstract: A three-dimensional modeling system comprised of a CAD apparatus provided with an input unit comprised of a keyboard etc., a computer forming the core of the system, and a display unit and a server provided with a three-dimensional model database, a characterizing quantity extraction database, a design rule database, and a shape sample database, wherein the computer recognizes a three-dimensional model as a whole without using attribute information and identifies the corresponding part and also extracts characterizing quantities included in the three-dimensional model for the identified part, applies design rules in the design rule database to the characterizing quantities extracted, and judges if the three-dimensional model complies with the design rules.

Abstract: A 3-D modeling system is provided for reducing design costs an efficient drawing checking operation. A number of CAD units and a server are connected through network and can communicate. The CAD unit includes an input device including a keyboard, a mouse device and the like, a computer, forming the center of the system, and a display device. The server stores a working process database including working process information. When checking a drawing for a 3-D model, the computer recognizes the shape of the 3-D model, divides the model into elements based on the shape recognition and determines an optimum working requirement for each element from the working process information. After the determination of the working requirement, if a correction is necessary, a message indicating the need for correction is displayed.

Abstract: A key input device according to the present invention includes a key holding unit having an outward shape which can be gripped by one hand and is structured as a separate part which is portable; at least five input keys which are provided on the key holding unit so as to allow separate operation of each of at least five input keys using each finger of one hand; and input units which are provided on the key holding unit in addition to at least five input keys, and which are operated in accordance with movement of the key holding unit; wherein input of characters are executed by combining at least five input keys with the input units. According to the present invention, it is possible to realize a key input device used for portable equipment in which a user can easily grip the key input device and easily execute an input operation of characters with a few operations of pushing buttons using one hand of the user.

Abstract: In an apparatus for controlling the energization time of an ignition coil of an internal combustion engine, a desired ignition timing is computed in accordance with a load and rotation speed of the engine and an energization starting time of the ignition coil is computed in accordance with the ignition timing. The energization starting time is retarded in accordance with the primary current through the ignition coil and the energization time of the ignition coil is reduced. The primary current flow through the ignition coil is interrupted at the ignition timing.