Self-help Mechanical Drawing: An Educational TreatiseT. Audel & Company, 1902 - 287 σελίδες |
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Σελίδα 44
... light and shade effects . CURVE . - A line of which no part is straight . Reversed Curve . - One whose curvature is first in one direction and then in the opposite direction . Spiral Curve . - A plain curve which winds about and recedes ...
... light and shade effects . CURVE . - A line of which no part is straight . Reversed Curve . - One whose curvature is first in one direction and then in the opposite direction . Spiral Curve . - A plain curve which winds about and recedes ...
Σελίδα 57
... light on the left hand , as in this di- rection the shadow of the pencil does not interfere with the view of the drawing . HOW TO CUT A PENCIL . Hold the pencil firmly in the left hand , as in the drawing , allowing about an inch to pro ...
... light on the left hand , as in this di- rection the shadow of the pencil does not interfere with the view of the drawing . HOW TO CUT A PENCIL . Hold the pencil firmly in the left hand , as in the drawing , allowing about an inch to pro ...
Σελίδα 58
... light , steady stroke , produced by a movement of the wrist , and add stroke upon stroke until the line is of the required depth . Continue this process to the end of the line of points . Now place the point D at the right distance ...
... light , steady stroke , produced by a movement of the wrist , and add stroke upon stroke until the line is of the required depth . Continue this process to the end of the line of points . Now place the point D at the right distance ...
Σελίδα 112
... light as is consistent with its necessary strength and stiffness of parts ; it should be made of suitable material easily manufactured , put together , and re- paired , and withal as truly correct as is possible to be made . Such a ...
... light as is consistent with its necessary strength and stiffness of parts ; it should be made of suitable material easily manufactured , put together , and re- paired , and withal as truly correct as is possible to be made . Such a ...
Σελίδα 118
... illustration . A pencil that is hard is best for mechanical drawing ; one that will retain a good point for some Fig . 167 . Fig . 168 . considerable time . Pencil lines should be made as light 113 Hawkins ' Mechanical Drawing .
... illustration . A pencil that is hard is best for mechanical drawing ; one that will retain a good point for some Fig . 167 . Fig . 168 . considerable time . Pencil lines should be made as light 113 Hawkins ' Mechanical Drawing .
Άλλες εκδόσεις - Προβολή όλων
SELF-HELP MECHANICAL DRAWING A N. (Nehemiah) 1833-1928 Hawkins Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
addendum circle Area axis beam compasses bisect blackboard blade Boiler bolt breadth called center line Circum circumference compasses curved line cylinder desc Diam diameter dimensions direction distance dividers dotted draughtsman drawing board drawing offices drawn edge end view equal erased figure fingers finished free-hand front elevation gear Geometrical hand Hawkins illus illustration inches India ink instruments length letters Linear Perspective machine marked measurements mechanical drawing object oblique Office Rules outlines parallel lines pencil perpendicular picture plane pitch circle pitch line polygon position practice produced projection proportion radius represents retina right angles rods scale screw section lines Set-Square shading shaft sheet shop drawings shown in fig shows side views sketch solid space spur gear spur wheel square Steam Engine steel straight line student surface T-square tee-square three views thumb tion top view triangle vanishing points vertical lines visual rays width
Δημοφιλή αποσπάσματα
Σελίδα 234 - Every line and letter (signatures included) must be absolutely black. This direction applies to all lines, however fine, to shading, and to lines representing cut surfaces in sectional views. All lines must be clean, sharp, and solid, and they must not be too fine or crowded. Surface shading, when used, should be open.
Σελίδα 83 - POSTULATES. I. LET it be granted that a straight line may be drawn from any one point to any other point.
Σελίδα 236 - ... at the lower lefthand corner, all within the marginal line, but in no instance should they trespass upon the drawings.
Σελίδα 234 - One inch from its edges a single marginal line is to be drawn, leaving the "sight" precisely 8 by 13 inches. Within this margin all work and signatures must be included. One of the shorter sides of the sheet is regarded as its top, and measuring...
Σελίδα 99 - The Tangent of an arc is a line touching the circle in one extremity of the arc, and continued from thence, to meet a line drawn through the center and the other extremity. Thus...
Σελίδα 14 - ONE step and then another, And the longest walk is ended ; One stitch and then another, And the largest rent is mended ; One brick upon another, And the highest wall is made ; One flake upon another, And the deepest snow is laid.
Σελίδα 234 - The scale to which a drawing is made ought to be large enough to show the mechanism without crowding...
Σελίδα 91 - From a point P in this line draw the perpendicular P B to the line AB, and on P describe the circle BD, touching the lines and cutting the center line at E. From E draw EF perpendicular to the center line, cutting AB at F, and from Fig.
Σελίδα 236 - They should, if possible, measure at least one-eighth of an inch in height, so that they may bear reduction to one twenty-fourth of an inch; and they may be much larger when there is sufficient room.
Σελίδα 49 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.