1、 毕业设计外文资料翻译 题 目 网格刻线机 学 院 机械工程学院 专 业 机械工程及 自动化 班 级 机升 1002 班 学 生 张静 学 号 20100404071 指导教师 苏东宁 二 一 二 年 四 月 二 日 济南大学毕业设计 外文资料翻译 - 1 - 济南大学毕业设计 外文资料翻译 - 2 - United States Patent Office,Ser.No.739,123 GRID RULING MACHINE John T Ferris, Houston, Tex. United States Patent Office Abstract This invention rel
2、ates to grid ruling machine and, more particularly, to apparatus for effecting an accurate transverse ruling of a grid blank of extensive length. Key words grid ruling machine GRID RULING MACHINE John T Ferris, Houston, Tex., assignor to Dresser Indhustres: Incorporated, Dallas, Tex, a corporation o
3、f Delaware Filed June 2, 1958, Ser. No. 739,123 11 C1aims.(Cl. 88-24) This invention relates to grid ruling machine and more particularly, to apparatus for effecting an accurate transverse ruling of a grid blank of extensive length. In the past grids have been ruled by machines using conventional me
4、chanical drives and stop and start controls in conjunction with a reciprocating mechanical scribing carriage . However, it is apparent that the numerous increments of short movement of the carriage interrupted by a complete stop during the operating stroke of the scribing carriage permits a repeated
5、 back lash or play between the machine elements within the limits of manufacturing tolerances. Since perfect accuracy in the design and construction of conventional machine elements is unattainable, evenmore small errors in scribing are multiplied with repetition so that grids scribed by such machin
6、es are necessarily limited in length. More recently interferometers have been employed to control the longitudinal increment of movement of the scribing carriages but since interference fringes lose their brilliance and contrast to an unusable level beyond certain minimum limits of movement, grids o
7、f more than a few centimeters in length cannot be produced under conventional interferometer control. It is, therefore, an object of my invention to provide a machine capable of producing ruled grids of a length unlimited by the necessity of minimizing multiplication of machine errors, or by the limits of practical interferometer operation. It is a further object of my invention to provide a means for ruling grids during
