Machine drawing, a practical guide to the standard - Survivor Library

296 Pages·2011·12.76 MB·English

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COPYRIGHT DEPOSIT.

MACHINE DRAWING
A PRACTICAL GUIDE TO THE STANDARD METHODS OF
GRAPHICAL REPRESENTATION OF MACHINES,
INCLUDING COMPLETE DETAIL DRAWINGS
OF A DUPLEX PUMP AND OF A
DIRECT-CURRENT GENERATOR
By CHARLES L. GRIFFIN, S.B.
ASSISTANT ENGINEER, THE SOLVAY PROCESS COMPANY
AMERICAN SOCIETY OP MECHANICAL ENGINEERS
AND
ADAMS,
C. C. B.S.
SWITCHBOARD ENGINEER WITH GENERAL ELECTRIC COMPANY
ILLUSTRATED
AMERICAN TECHNICAL SOCIETY
CHICAGO
1920
1°
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%
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COPYRIGHT, 1914, 1920, BY
AMERICAN TECHNICAL SOCIETY
COPYRIGHTED IN GREAT BRITAIN
ALL, RIGHTS RESERVED
¥
:
MAY l3i92(T
)CU565943
CONTENTS
PAGE
Working drawings
1
Definition of 1
Lines 2
Arrangement of views 4
Sectional views 5
Shade lines 7
Dimensions 9
Classes of Workmen using drawings 11
Specifications for screw threads 15
Specifications for bolts and nuts 20
Specifications for pipes and pipe threads 26
Scale drawings 27
Details of preparation 31
Pencil drawing 31
Tracing 32
Blue printing 33
Illustrative drawings 37
Crank 37
Bell crank 41
Rocker arm and pin 42
Link stud 43
Flange coupling 43
' . .
Clamp eye 45
Connecting rod 4G
Gear with split hub 46
Spur gear 49
Pair of beveled gears 49
Worm and worm gear 49
Cylinder head 52
Water cylinder for triplex pump 53
Hoisting drum 56
Crane drum grooved for chain 56
Detail of ordinary shaft 59
"Broken" pieces and "out-of-scale" dimensions 60
Bearing stand with cap and boxes removed 60
CONTENTS
2
PAGE
Working drawings
Sample letters 61
Drawing room practice 62
Plates 63
Mechanism drawing 69
Helix 70
Screw threads 75
Cams
82
,
Belting 108
Gears 132
Plates 14a
Working shop drawings—mechanical 157
Plan and scope of advanced work 157
Essential requirements 159
Duplex pump plates 163
Steam end layout 165
Steam cylinder 171
Piston rod and valve stem 184
Steam chest and valve 186
Valve motion layout 189
Valve motion details 193
Yoke, stuffing boxes, bracket, etc 195
Water end layout. 199
Water cylinder 201
Water cylinder cap and air chamber '. 204
Plunger and valve details 206
Foundation 208
General drawing 208
Order sheets 211
—
Shop drawings electrical. 219
Requirements 219
Essentials of a good drawing 220
Design of a direct-current generator 222
Material supplied to designing draftsman 222
Preliminary layout sketch 224
General outline drawing 224
CONTENTS
3
PAGE
Design of a direct-current generator
Details of armature and commutator 224
-.
Armature punchings 226
Armature windings 226
Armature flanges and spider 230
Equalizer rings and support 231
Commutator details 233
Armature shaft 238
Details of field frame and coils 238
Magnet frame and base 240
Pole pieces 241
Main field coils and spools 245
Commutating field coils and spools 246
Details of brush rigging. 249
Brush holder, stud and connections 249
Brush holder yoke and brush shifting device 253
Bearings and pedestals 255
Split bearings for armature shaft 255
Pedestals and caps for bearings 257
Details of electrical connections 259
.
Assembly of connections 259
Connections 262
Final assembly drawing 262
Outline 262
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