Über dieses Buch
Meine Mediathek
Bücher bei Google Play
Calculation of work done in a Compound Engine, Illus-
trated and Described...
PAGE
104
106
Engines with Cranks at Right Angles .
Variations of Tangential Pressure on the Crank of a
Direct-acting Engine, Illustrated and Described. . 107
The Use of an Intermediate Receiver, Illustrated and
Described. . .
109
CHAPTER VI.
SLIDE VALVES.
Steam and Exhaust Ports . . .
112
Escape of the Exhaust Steam, Illustrated and De-
scribed.
113
Perfection of a Steam Valve; Valve "Lead.".
II4
Release of the Steam when the Stroke has been Com-
Lap, Importance of, upon a Slide Valve, Illustrated and
118
CHAPTER VII.
PROPORTIONING PORTS AND SLIDE VALVES.
Importance of the Lap and Travel of Valve . .
Rules for Finding the Area of Port Openings, Illustrated
and Described.
122
123
Rules for Finding the Lap and Travel of a Valve, Illus-
trated and Described . . .
124
CHAPTER VIII.
VALVE MOTION DIAGRAM.
Crank-pin and Eccentric's Centre Circle Motion, Illus-
trated and Described .
127
Motions of Steam Ports, Exhaust Ports, and Bridges, Illustrated; Sectional Elevation of the Valve, Illus- trated and Described . .
Motion Curves, Illustrated and Described.
128
130
133
Table by which to find the Relative State of Piston and
Exhaust after Expansion. .
Table by which to Ascertain the Amount of Lap Neces-
sary on the Steam Side of a Slide Valve to cut the
Steam off at Various Fractional Parts of the Stroke. 134
CHAPTER IX.
HOW TO SET A SLIDE VALVE.
To Find the two Centres, Illustrated and Described. . 135
To Find the Length of the Eccentric-rod, Illustrated and Described. .
CHAPTER X.
ENGINE PROPORTION AND CONSTRUCTION.
Loss from Hot Slides ...
Errors in Constructing Cross-head and Crank-pins
Adjustments of the Connecting-rod Boxes
136
English Cast-iron Pistons
Effect of Self-acting Steam Packing on Cylinders;
Errors of Heavy Castings for Pistons.
148
149
Main Crank Shaft and Driving Pulley; Considerations
to be observed in Calculating the Diameter of a
Shaft.
160
Imperfections of Cast-iron Shafts; Wrought-iron Shafts. 161
Transmitting Power of a Shaft; Speeding up of Driving
164
Disengaging Valve Motions and their Adjustment. .
Evils Arising from Attaching Valve Gear to the Cylin-
der; Exhaust Valves of the Corliss Engine and
Brown & Wright Engine..
Governors and their Speed. .
Single and Double Horizontal Engines, and the Trans-
165
167
168
172
174
mission of Power to Main Lines and Counter ..
Stud Bolts and the Practice of Tapping Cast-iron .
Boiler Proportions; Settings for Boilers.
Walls for Fire Tube Shell Boilers. .
Construction of Buckstaves for Holding Side Walls; of
the Return Arch, and of the Main Bridge Wall;
Combustion Chamber . .
Feed and Blow-off Pipes and Valves
175
176
178
Entrance of the Feed Water to the Boiler.
179
Construction of Check Valve.
180
Gauge Cocks, Water Gauges, Safety Valves, and Stop
Valves
Engine Designed by Win. H. Hoffman, Illustrated and
Described. .
185
Setting up Steam Engines, Illustrated and Described. 187
Anchor Bolts, Illustrated and Described. . . .
Setting up an Engine without the Template; Steel vs.
Iron Plates.
Man-holes, Stays, Hand-holes, Side Seams, Caulking,
Tensile Strength of Steel Plate for Flanging
Correctness of the Principle of Drilling both Steel and
194
196
200
202
203
205
on Boiler Evaporation. .
Proportion of Tube Area to Grate Area.
Shells and Tubes; Proportion of Heating Surface to
Grate Surface; of Tube Opening to Total Grate Area. 221
Boiler Designed by W. H. Hoffman, Illustrated and De-
.
222
Babcock & Wilcox Sectional Boiler, Illustrated and De-
225
CHAPTER XI.
UNITED STATES GOVERNMENT GENERAL RULES AND REG-
ULATIONS FOR STEAM (MARINE) BOILERS.
Stamping of Boiler Plates; Tensile Strength of Plates. 227
Duties of Local Inspectors.
228
Affidavit of Manufacture of Marine Steam Boilers;
Ductility and other Lawful Qualities of Iron and
Steel Plate
229
Gauge to be employed by Inspectors; Form of Samples
to be submitted to a Testing Machine, Illustrated. 230
Form for Reporting Tests of Boiler Material; Pressure
Allowable on Boilers of Various Dimensions Built
Prior to February 28, 1872. . .
231
Riveted Flues; Proportionate Thickness of Material to
Diameter of Flue.
233
Lap-welded Flues; to Determine the Pressure Per Square
Inch Allowable on Lap-welded Flues.
236
Corrugated Furnace Flues, Formula for Calculating the
Strength of..
240
PAGR
242
Admission of Feed Water; Inspection of Boilers; Re- strictions in use of Vertical Tube Boilers; Regula- tions for Steamers Having Boilers Externally Heated; for Boilers Internally Heated. . . .
Space Between the Underside of the Shell and the Keel-
son; Openings of Man-holes; Wood-work within
two Inches of the Boiler; Spaces at Back and Ends
of Boilers; Name Plates of the Manufacturer. . . 243
Donkey Boilers for Sea-going Steamers; Plugs of Banca
Tin.
Gauge Cocks for Steamers; Lever Safety Valves.
Inspection of Donkey Boilers..
249
Regulations for Steam Gauges; Applying the Hydro-
static Test to Boilers ..
Steam Pressure Allowed on Boilers; Licensed Officers. 250
Classification of Engineers.
Changes in Steamboat Rules; Amendments made by
the Supervising Inspectors and Approved.
CHAPTER XII.
251
253
TO FIND THE SIZES (DIAMETER) OF CYLINDERS FOR COM-
POUND ENGINES-HORSE-POWER REQUIRED—
BOILER PRESSURE AND SPEED OF PIS-
TON BEING GIVEN.
Rule for Finding the Number of Times the Steam is
Expanded.
255
Rule for Finding the Area of a Cylinder; to Find the
Point of Cut-off in a High Pressure Cylinder . . . 256
CHAPTER XIII.
TO FIND THE MEAN PRESSURE.
Table of Logarithms for Finding the Mean Pressure of
a Boiler.
Table of Mean Pressure of Steam at Different Rates of
258
Expansion..
260