【正文】 ource 11. Such apparatus is particularly adapted to produce elongate grids by a novel means. Adjacent to the path traveled by the carriages1 and 2 is secured an elongate grid blank 30。 畢業(yè)設(shè)計外文資料翻譯 題 目 網(wǎng)格刻線機 學(xué) 院 機械工程學(xué)院 專 業(yè) 機械工程及 自動化 班 級 機升 1002 班 學(xué) 生 張靜 學(xué) 號 20210404071 指導(dǎo)教師 蘇東寧 二 〇一 二 年 四 月 二 日 濟南大學(xué)畢業(yè)設(shè)計 外文資料翻譯 1 濟南大學(xué)畢業(yè)設(shè)計 外文資料翻譯 2 United States Patent Office,123 GRID RULING MACHINE John T Ferris, Houston, Tex. United States Patent Office Abstract 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. Key words grid ruling machine GRID RULING MACHINE John T Ferris, Houston, Tex., assignor to Dresser Indhustres: Incorporated, Dallas, Tex, a corporation of Delaware Filed June 2, 1958, Ser. No. 739,123 11 C1aims.(Cl. 8824) 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 mechanical 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 plete stop during the operating stroke of the scribing carriage permits a repeated 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 machines 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 of 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 濟南大學(xué)畢業(yè)設(shè)計 外文資料翻譯 3 continuous motion of the ruling device along the length of the grid blank. It is a further object of my inversion to provide an inter interferometer having an operating range limited only by the length of the machine ways along which it is guided. It is a further object of my invention to provide a novel method of ruling a grid blank which does not requires start and stop increments of movement of the supporting carriage. It is a further object of my invention to provide a grid ruling machine that is automatic and, at the same time, reliable and accurate in operation. In carrying out my invention, I provide a pair of carriages adapted to move along well machined ways. Drive means and stop means which may be integrated are provided for independent movement of each carrier. Elements of an interferometer are arranged on the carriages, so that relatively movable elements thereof are separately movable. Control means are provided to move the carriages along the ways alternately, step by step, in increments within the practical range of the interferometer, with one carriage supporting a unique marking device that is operable during movement of that carriage. Thus, there is a setting stroke of one carriage, an active stroke of the marking carriage, a setting stroke and so. on until the full length of the ways has been traversed if desired. For marking the grid blank, I provide a coating of light sensitive emulsion on the blank arid employ as the marking device a source of light capable of exposing a fine line across the width of the grid blank. The source of light is fired at intervals during continuous movement of the marking carriage in response to signals generated by the interferometer. Other objects and advantages of my invention will bee apparent from the description following when read in connection with the drawing wherein: FIG. 1 is an isometric view of my apparatus。 FIG. 2 is a schematic plan view of the ruling machine. Referring now to the drawing, my grid ruling machine prises two carriages l and 2 separately driven along .well machined ways by any conventional drive means such .as pinions 3 and 4, engaging racks 5 and 6 along the machined ways. Each gear 3, 4 is driven by an electric motor 7 and 8, preferably of the servo type so that the velocity, starting and stopping of the carriages l and 2 along the ways, can be maintained under close control. As is well known, the desired velocity control is achieved with a servo motor by modifying the current delivered thereto in response to variations in speed actually delivered thereby Butin any event, the specific drive means employed for the carriages is not material and the motors and gears described are shown by way of illustration only. Other speed control mechanisms such as speed reducers can be utilized to supplement the means shown. Moreover, other mechanisms such as constant tension springs or even gravity may be 濟南大學(xué)畢業(yè)設(shè)計 外文資料翻譯 4 substituted as drive means. The important consideration in the apparatus to be hereinafter described is that means be provided to start, stop and otherwise control with extreme accuracy the mo