First Principles Of Mechanical And Engineering Drawing



H Holtbutterfill, quot;First Principles Of Mechanical And Engineering Drawingquot;
Amberg Press | 2008 | ISBN: 140864648X | 224 pages | File kind: PDF | 10,7 mb
TIHE higher component of t, hc sub cct m atter of t, his book appeared in a series of articles within the Tfechnr ica II l T orld. The purpose in writing it’s so fullv ex lainetl in thc Introduction that a Preface is hardlv V C d needed. As the forms gi-en to the numerous parts of a machinc or er gine are on analysis invariably discovered to be combinst, ions of particular geometrical solids. s knowledge of how every of these ought to be drawn c3 when in any posihon ought to initial acquired by the student draughts man. To this end a series of issues is giwn within the folloxving pages, coinmencing with the construction of those easy geometrical figures which form the surfaces of the solids which give shape to mechanical rletails, and subsequently the rnetliotl. aclopted in representing the solids themselves, singly and in combin a t lon. As no quantity of copying rlrawinga of mechanical dehils -ill . ever i v oth e student a knowledw of the reasons whv thev are rnadc to tal the unique forms given to Them, so in t, he earlik sGgrs of the study of mechanical drawmg it ip, impossible for him to acquire the pou-er to draw the simplest solids in numerous positions correctly with out a knowledge of t, he principles of 01. thographic Projection, which is the basis of the representation of all solid objech. In this component of the subject an extended series of issues is given, the answer of which ought to enable t, he student to draw any easy object with out further hela. Within the kethod of studying the contents of this work, the student is advised to tako the numerous pm-ts of the subject within the orcler in which they’re arranged, as he will thereby be led to acquire a mwtery of it in a way that mill impress upon his nund the connection that every component bears to that which follows. The order of study might not be that generally followed, but it js like an association of numerous ears with draughtsmen and studentt has p r o d ta the author to be t g e bcst for the acquisition of the preliminary knowledge essential ta the effective practice of the draughtsmans art. This work ix not, intender1 a6 a treatise on either Plane or Solid Geometry, but m a lot of these subjects is given as will probably be needed by the student ta attain to an easy comprehension of the initial principles of mechmical drawing as herein exemplified. Their actual application to the delineat, ion of machine elements and engine details might possibly form the subject of a further work. H. HOLT-BUTTERFILL. CONTENTS Infrcduetiwt.-THE V ALUE O F A KSOWLEDO O E F DRAWIN T Q O THE STUUEST FAOF. CHAPTER I THE TOOLS A XD IATERIA R L E S Q UIRED BP THE STUDEST Drawing-Board-Tee-Sq sre-Adjustable Blded SquareSet-Squares-Pencils-Dmwing – Pitis-Paper-Rubber-Ink-Drawing Instru ments . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 CHAPTER IT MECHANICAL A ND FREEHAKDRDA WISG THEIR D IFFERENCE . ASD USEB Tho mearlirig of Freehud Drawing-How 01 jecta are made visible-Ilrhat a Perspective is-How a Perspective Dwwing is obtained-Tlle use of a Perspective Drawing to thc workman-An Oi-thographjc Projection, and how obtained-The nleaning of Plan and Elevntiotl 12-16 CHAPTER 111 PRACTICA G L EOMETRY AS D IECHANIC D A n L a w sa Tho mertni of g tlie term Geometry-The distinction between Plane and Solid Geometry-Definition of Geometrical terms utilized within the work-Plane Geometrical Figures . . .
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