| Year | 1938 |
| Date | 09-Jun |
| Volume | 78 |
| Issue | 1,935 |
| Page | 548 |
| Category | General |
| Part | |
| Title | An Interesting Gear-Transmission Problem |
| Author | |
| Notes | The spur and pinion gear as proposed by querist, a simple form of friction clutch to relieve overload stresses in the gearing |