PREFACE The need for an illustrated and condensed work of reference for the inventor, the mechanical student, the artisan, and the workingman with the ambition of an inquiring mind, has become not only apparent to teachers of mechanics, but a real want among all who are interested in mechanical thought and work. It is an interest the growth of which has been greatly encouraged by the rapid development of the inventive and mechanical arts during the past half century. The increasing inquiries from inventors and mechanics, in regard to the principles and facts in constructive and operative mechanics have induced the author to gather such illustrations as have been found available on the subject of mechanical motions, devices, and appliances, and to place them in a form for ready reference with only sufficient text to explain the general principles of construction and operation, and as a partial exhibit of the mechanical forms in general use, with a view to place the largest amount of illustrated information within the limited means of the humblest seeker after mechanical knowledge. The field of illustrated mechanics seems almost unlimited, and with the present effort the author has endeavored partially to fill a void and thus to help the inquirer in ideal and practical mechanics, in the true line of research. Mechanical details can best be presented to the mind by diagrams or illustrated forms, and this has been generally acknowledged to be the quickest and most satisfactory method of conveyng the exact conditions of mechanical action and construction. Pictures convey to the inquiring mind by instantaneous comparison what detailed description by its successive presentation of deas and relational facts fail to do; hence a work that appeals directly to the eye with illustrations and short attached descripions, it is hoped, will become the means of an acceptable form of mechanical education that appeals to modern wants for the couragement of inventive thought, through the study of illu tions and descriptions of the leading known principles and in constructive art. The designing of the details of mechanical motion, devices. appliances for specific purposes is an endless theme in the structive mind, and if we may be allowed to judge from the number of applications for patents, of which there have been a million in the United States alone, and of which over six hund thousand have been granted in consideration of their novelty utility, the run of mechanical thought seems to have become a river in the progress of modern civilization. To bring into illustrated detail all the known forms and ments of construction is not within the limit of a human life; to explore the borders of inventive design through the works t have passed into record has been the principal aim of the author this book. GARDNER D. HISCOX PREFACE TO ELEVENTH EDITION. The success of the previous editions of this work warran the issue of this edition in enlarged and improved form, in whi more than one hundred and fifty up-to-date mechanical mov ments and devices have been added, making it a most usef book of reference for those engaged in mechanical studies ar pursuits, notably inventors and designers of machinery, in fac for all who are interested in mechanics and its devices. GARDNER D. HISCOX. CONTENTS. WEIGHT, RESOLUTION OF FORCes, Pressures, Levers, PullEYS, TACKLE The Resolution of Suspension-Lever Paradox-The Lever and Its Power-. The Inclined Plane-The Wedge-The Screw-Worm Gear or Endless Screw --Chinese Wheel-Tackle Blocks-Chinese Windlass-Chinese Shaft Derrick- Compound Weight Motor-Rope Twist Lever-Spanish Windlass-Rope Grip Hook-Guy Rope Clip and Thimble-Rope End-Hemp Rope End...15 to 26 KOPES, BELTS, FRICTION GEAR, Spur, Bevel, and Screw Gear. Alternating Circular Motion-Circular Motion-Eccentric Crank-Capstan, or Vertical Windlass-Steering Gear-Jumping Motion-Rope Sprocket Wheel-- V-Grooved Rope Pulley-Rope Transmission--Vibratory Motion—Transmission by Rope-Transmission by Rope to a Portable Drill or Swing Saw-Horizontal Rope Transmission-Rope Transmission-Rope Transmission to a Movable Shaft-Vertical Tension Carriage-Belt Lacing-Novel Belt Lacing-Over- and-Over Lacing--Interlocking Belt Lacing-Cross Lacing-Sectional Belt Lac- ing Quarter Twist Belt-Full Twist Belt-Full Twist or Cross Belt-Belting to a Shaft at any Angle-Quarter Twist Return Belt-Change Speed Step Pulleys-Cone Pulleys-Curved Cone Pulleys-Shifting Device for Cone Pulleys -Belt Transmission-Belt Transmission of Power-Variable Transmission of Motion-Stop, Driving, and Reversing Motion-Two Speed Pulleys and Belts- Pulleys, Combined with a Differential Gear—Transmission of Two Speeds- Two-Speed Gear-Variable Speed or Cone Gearing-Transmission of Power -Frictional Rectilinear Motion-Variable Rotary Motion-Variable Motion -Friction Gear-Transmission of Variable Speed-Variable Speed Gear- Transmission of Rotary Motion-Combination of Friction Gear-Grooved Fric- tion Gearing-Variable Motion-Transmission of Circular Motion-Three Crank Link-Sprocket Wheel and Chain-Link Belt and Pulley-Toothed Link Chain and Pulley--Step Gear-V-Toothed Gearing-Oblique Tooth Gear-V-Toothed Gear-Split Spur Gear-Star Wheel Gear-Elastic Spur Gear-Internal Spur Gear and Pinion-Bevel Gears-Crown Wheel-Spiral Gearing-Oblique, Spur, and Bevel Gear-Oblique Bevel Gear-Gear Train-Worm Gear-Skew Worm and Wheel Gear-Uniform Intermittent Motion-Variable Speed Bevel Gear. SPEED, PRESSURE, WEIGHT, NUMBERS, QUANTITIES, AND APPLIANCES. Prony Brake-The Prony Brake Rule-" Webber" Dynamometer-Measur ment of Power-"Tatham's" Dynamometer-Bell-Crank Dynamometer- "Neer's " Rotary Transmitting Dynamometer-"Van Winkle's" Power Meter- Traction Recording Dynamometer-Friction Machine-Torsion Dynamometer- Tensile Testing Machine-Bourdon Pressure Gauge-Corrugated Tube-Pressu Gauge Recording Pressure Gauge-Parallel Motion of the Indicator-Parall Motion for the Indicator-"Amsler " Planimeter-" Lippincott" Planimeter- Centrifugal Speed Indicator-Speed Indicator-Meter Dial—Automatic Tippin Scale-Double Link Balanced Scale-Differential Weighing Beam-Engin Counter-Operation of a Counter-Intermittent Rotary Motion-Tire Measur BOILERS AND ADJUNCTS, ENGINES, VALVES AND VALVE GEAR, PARALLE MOTION GEAR, GOVERNORS AND ENGINE DEVICES, ROTARY ENGINES "Stevens" Boiler-Plain Cylindrical Boilers-Hanging Water Drum Cylindrica |