1925 Walschaert Valve Gear for STEAM Locomotives - Parts 1 & 2 - reprints

Description

Walschaert Valve Gear (Part 1) Arrangement and Operation: Action of Gear
, ICS #, originally published International Correspondence Schools, Scranton, Pennsylvania, 1925. Reprinted by Nation Builder Books, Mebane, NC, 2015. 5½ x 8½ photocopied booklet, 40 pages.
- - - AND - - -
Walschaert Valve Gear (Part 2) Details of Gear
, ICS #, originally published International Correspondence Schools, Scranton, Pennsylvania, 1925. Reprinted by Nation Builder Books, Mebane, NC, 2015. 5½ x 8½ photocopied booklet, 60 pages.
Please note these are new photoduplicated reproductions, not originals.
The accompanying pictures were scanned from reprints, not the originals.
If you are a live steamer, and you’ve always wanted to know the two general methods of connecting a radius rod to a reverse-shaft crank, then these are the books for you. (We also have the ICS booklets on the Stephenson valve gear and Baker valve gear). This book will explain why a different type of gear frame must be used for a two-wheel engine truck, than for a four-wheel truck. Or what change in position is brought about by the movement of the reverse lever. And why the Stephenson valve gear can be used only on the early steam locomotives.
And if you’re lucky and skilled enough to actually operate a live steam locomotive or engine, at a threshermen’s reunion or antique tractor show for example, then maybe you’ve pondered what to do if a link hanger or radius rod breaks. And wouldn’t it be cool to be able to explain to all those bystanders what an eccentric does, and how an engine is put into reverse?
As is usual with most correspondence course booklets by the International Correspondence Schools, this is richly illustrated with crisp line drawings.
Contents, Part 1, Arrangement and Operation: Action of Gear
Introduction
Principles Underlying Gear
Characteristics of Walschaert Gear
Investigation of Principles
Position of Valve With Respect to Piston
Position of Valve With Respect to Main Crank
Operation
Gear Not Reversible
Arrangement for Reversing
Effect of Lap and Lead on Arrangement
Arrangement for Moving Lap and Lead
Effect of Combined Motions
General Description
Views of Valve Gear
Name of Parts
General Arrangement of Parts
General Operation
Movement Imparted by Reverse Lever
General Operation of Gear
Oiling Points in Valve Gear
Eccentric-Crank and Combination-Lever Movement
Combination of Movement
Separation of Movement
Movement Imparted by Eccentric-Crank
Movement Imparted by Combination-Lever
Location of Radius-Rod Connection With Outside- and Inside-Admission Valves
Different Arrangements of Gear
Types of Gear Frames
Reason for Different Types
Types of Radius-Rod Hangers
Types of Reverse-Shaft Cranks
Arrangement of Crank
Disadvantages
Difference in Thrust on Link-Trunnion Bearings
Link-Block Slip
Eccentric Crank
Development of Eccentric Crank
Action of Eccentric Crank
Position of Eccentric Crank
Direct and Indirect Motion
Center Line of Motion
Conditions on Which Positions Depends
Outside-Admission Valve and Direct Motion
Inside-Admission Valve and Direct Motion
Link Arc and Link Radius
Constant Lead
Curvature of Link With Walschaert and Stephenson Gears
Variable Preadmission with Constant Lead
Examination Questions
Contents, Part 2, Details of Gear
Gear Frame
Purpose
Reason for Different Types
Construction
Cross-Ties and Guide Yokes
Purpose
Decription
Eccentric Crank
Purpose
Construction
Applying and Removing Eccentric Crank
Eccentric Rod
Purpose
Construction
Purpose and Construction of Link
Purpose
Construction
One-Piece Link
Dimensions of Link
Radius Rod
Purpose and Construction
Assembly of Link, Link Block, and Radius Rod
Combination Lever
Purpose
Construction
Proportions of Combination Lever
Rule
Combination, or Union, Link
Purpose
Construction
Radius-Rod Hanger
Purpose
Construction
Radius-Rod Hanger-Pin
Reverse-Shaft Crank and Reverse-Shaft Arm
Purpose
Construction
Reverse Shaft
Purpose
Assembly of Parts
Assembling Link
Assembling Radius Rod in Link
Assembling Radius Rod Lifter
Arrangement and Assembly of Combination Lever and Valve-Stem Crosshead
Other Arrangements of Combination Valve-Stem Crosshead and Guides
Arrangement of Valve-Stem Crosshead and Guide With Outside-Admission Valve
Reversing
General Explanation
Principle Involved
Movement of Valves When Reversing
Change in Cut-Off
General Explanation
Principle Involved
Back-Set of Link Foot
Angularity of Eccentric Rod
Effect of Back-Setting Link Foot
Breakdown
Obtaining Gear Movement When Gear Fails
Broken Eccentric Crank, Eccentric Rod, or Link Foot
Broken Radius Rod
Broken Combination Lever or Union Link
Broken Lift Hanger or Lift-Hanger Pins
Examination Questions