| Year | 1954 |
| Date | 15-Apr |
| Volume | 110 |
| Issue | 2,760 |
| Page | 412 |
| Category | General |
| Part | 1 |
| Title | Adapting Ex-Service Apparatus - The Sperry Anti-Aircraft Predictor |
| Author | "Artificer" |
| Notes | The component parts, motor, variable speed units, differential gears, worm gear units, ball-races, spur gears |