T 35^ B^5 MtpHMfMp MECHANICAL DRAWING PROBLEMS BERG $ KRONaUIST j-nTr — ^-T' — n'"'rinir""VTi "nilT"" ■—■—^~^^•^—■■- mmlamUitmitumuuntmtm»nfmmtmmimm»»imtMntmtiitmtimttittmUitltt\lli\liftUiUMiwuVitH»tl»ii. _4) \A/ifh pencil , ~F& quare and Tric/n^ /e- c/ra\A/ vertical fine.& from The boT - Tonn to\^ar'd£> "the Top . METHOD OF LAYING OUT BORDER LINE AND CUTTING LINE (Continued) ^5) JDrci\r/ \/(zry light circular ' n^c,^ g/^ in c/iccrTec/ ^ c cj-tTin To cfesir^ffcf /enqt, in c/icoTac^ . cj-rtTJjna off hof^de-r ^ //"/-re G) The, fini&hec/ £?c?rc/e^ h'n& e7g>7C //e c/ in „ . 7~h^ cuTt/n^ I jyre niz.cc/ noT be f pcnc i/e c/ //?. © MEITHOO or L. AY IN G- OUT A< S//^/=>L.E: f=>l^^TE:. f^et^cl / lay-ou T of o 3> inn pie p/ate- f^eac/ y f'o h§ ^, 0er?ci/<3c/ in ^^ o^~ ink e ci . 2L) 7~h^ finished plate as jT \r^i// ajo - pean \AyhGn psnci led /'a7 oa- /r>ked . DDD nnn u MECHANICAL DRAWING PROBLEMS Specification — Plate 1. Draw horizontal and vertical lines with T-square and triangle to form eight squares as shown in the lay-out sheet on the opposite page. Draw diagonals in squarer i, 2, 3, 4, 5, 6, and space off half inches on the* diagonals. Sq. I. Draw horizontal and vertical lines through half inch marks. Sq. Sq. 45° lines (to a horizontal) through half inch marks in hoth directions. 30" 60° " " " ^ . o ii a c( ct ^„o L/\CIM& TfR/A/SfG'l-E.'B TO C)RA\A/ 1^/ME.xS //V PLATE. J_ PLATE 1 (Completed) l8 . MECHANICAL DRAWIXG PROBLEMS Specification — Plate 2. This plate is to acquaint the student with the form and method of executing upright gothic capital letters and to lay the foundation for the lettering on the plates that are to follow. The letters are arranged in three groups: the first group comprising those of \-ertical and horizontal strokes ; the second group including slant or inclined strokes ; the third group including curved strokes. A number of words are given with each group. Enough words should be let- tered to fill out the space. Shorter words such as IF, IT, TILL, WE, AXE, and IN, may be used or original words may be substituted by the student. In laying out the sheet draw first the horizontal guide lines. The bow dividers may be set to the height of the letters and used to good advantage. Then draw the vertical guide lines for the letters in the groups, spacing them evenly as indicated in the lay-out sheet. The letters in the words should he close to each other and the zvords zvcll separated. Draw a few vertical guide lines, spac- ing them at random, to help form the letters in the words and also the figures. The direction of each stroke should be followed carefully and should always be used in making the letters. The title should always be symmetrical with reference to a vertical center line and should be located as indicated on the lay-out sheet. Start with the longest line and letter backwards. This will insure its being placed correctly and will help in making it symmetrical. I '2' i' ~W -IcO I, -1(0 :z: 32" -to -|«0 LAY-OUT OF PLATE 2 '-H 1^ ■-J k-r l± l± TABLE OF STROKES L T H F E N Z M 4 7 2 STROKES 1 £ 3 4- i ( 1 i^ H 1 F i' r— -• F ■:r~ ii 1 N 7 Z r h f\/ Ml 1^ ^ A ^— . 7 P 1 32 :a V ^/V K v/ /\ Y U J O 5 3 S STROKES 1 2 3 4- A A \.,, V \^ V' \A W/ (:, K K \ X Y U i* U (C Q '•' O 5 -^ 3 Cc c§ cf © o c G D P R B S 6 9 O STROKES j 1 2 3 c Q 9 r r^ Q' r D D T r^ P i p R f p B /^ ^ S c 6 ^ 9 a cc v^ ^ <& Location d/nnen^/on& are a/\/\/ay s> faid out to fufl size. , but should be onnitted lin the finished c/f-as/^in^ . PLATE 2 (Completed) I L T H F E LIFE LITHE FILE LIFT TILE ZXMAVWKNY EXAMINE ZEAL WEAK UUOQCeDPBSR&. PROBLEMS QUIT UPRIGHT FREEHAND GOTHIC CAPITAL LETTERS 2345678QO 35 26 79o" 9^' |f " ^16 9 32! I '6" ^^ 1 % %.. MAIN title: SCALE DATE NAM EL 22 MECHANICAL DRAWING PROBLEMS Specification — Plate 3. With light lines draw ii squares as shown in the plate on the opposite page. Each square contains a figure involving a geometric problem, the solution of which must be understood before the figure can be drawn. Study carefully the geometric problem referred to in each case. Alake the line 2" long. See page 188, Prob. i. See page 188, Prob. 2. The vertex of the angle is located as shown. The angle is 60°. See page 188, The line is 2" long and is to be divided into 5 parts. See page 189, Prob. 4, See page 189, Prob. 5. Large arcs, i" radius; small arcs, Yi" radius. See page 189, Prob. 6. The arcs have a radius of Yz"- See page 190, Prob. 7. Large arc, Ya" radius; small arcs Y9>" radius. See page 190, Prob. 8. Diameter of circle, 2Y2" . See page 190, Prob. 9. Diameter of circle, 2.Yi," ■ See page 191, Prob. 10. See page 191, Prob. 11. Sq. I. Sq. 2. Sq. 3- Prob. 3. Sq. 4- Sq. 5- . Sq. 6. Sq. 7- Sq. 8. Sq. 9- Sq. 10. Sq. II. Title:— GEO^IETRIC PROBLEMS SCALE DATE NAME PLATE 3 «OkO A- 24 MECHANICAL DRAWING PROBLEMS WORKING DRAWINGS. A working drawing of an object is a group of completely dimensioned views of that object, so arranged and drawn that it will give all the information necessary to make the object. A picture drawing of an object is a single view of the object represented as it appears to the eye when viewed or looked at from a stationary point. It shows only those parts, surfaces and edges, that can be seen from one point and does not show them in their true shape, proportion or relative size. In a working drawing the object is viewed from many points — as many as are necessary to show all the edges, surfaces, etc., in their true shape and size. In a picture drawing we have one view of the object, in a working drawing we have two or more views, sometimes five. It will be noticed in the working drawings on the opposite page that the invisible or hidden edges of an object are shown as well as the visible edges. They are represented by means of broken lines which indicate that they are hidden from view by some other part of the object. 1. How does a working drawing differ from a picture drawing of an object? 2. How many views should be shown in a working drawing of an oliject? 3. How are invisible or hidden edges of an object indicated in a working drawing? WORKING DRAWINGS PICTURE. DRAWING lA ♦—^1^ ' i ^ ' WORKING DRA\NlNO PICTURE. DRAWING ZA -i-nJr<3H- j_2 1 r J L i VORKlN& DRASA/IN& ^ picture: DRAWiNO 4-A WORKING DRA^A^IN& PICTURE DRAWINe 6A WORKING DRAWIN& PICTURE. DRAWINO 3A 1 1 WO RKIN & Dl ^AW N& PICTURE. DRAWINe 6A W^ORKINie DRAWING 26 MECHANICAL DRAWING PROBLEMS Specification — Plate 4. Make a complete working drawing of the Lap-joint Piece, showing the front, top and right side views. The lay-out sheet on the opposite page gives the location of views and shows the front view complete. The top and side views are partially drawn and are to be completed with the aid of the front view and the picture drawing shown in the upper right-hand corner. Scale I2"=i'. Indicate all dimensions which are necessary and helpful to make the piece. Title:— LAP-JOINT PIECE SCALE DATE NAME In a w^orking drawing of an object one of its sides or surfaces is selected for the front view. It is drawn as it appears when held squarely in front of and on a level with the eye. The top view is drawn as it appears when the object is viewed squarely from above, and is placed directly above and in line with the front view. The side view is drawn as it appears when the object is viewed squarely from the side, and is placed directly opposite and in line with the front view. When the object is viewed from the right side, the side view is placed to the right of the front view; when it is viewed from the left side, the side view is placed to the left of the front view. 1. Is the top view placed directly above the front view ? 2. Is the side view placed directly opposite the front view? 3. Where should the left side view be placed with reference to the front view? PLATE 4 n- PENCIL LAY-OUT OF PLATE 4 tr PLATE 4 (Completed) -.' ^ a. ai I "