| Year | 1924 |
| Date | 12-Jun |
| Volume | 50 |
| Issue | 1,207 |
| Page | 668 |
| Category | Steam |
| Part | |
| Title | A Method of Correcting for the Straight Slides Used in Model "Joy" Type Reversing Motions |
| Author | Henry Greenly |
| Notes | Application of one- and two-pin motion, vibrating link pins for valves with lap, curvature correction, "corrected" type valve motion without valve lap |