| Year | 1940 |
| Date | 03-Oct |
| Volume | 83 |
| Issue | 2,056 |
| Page | 259 |
| Category | Workshop |
| Part | |
| Title | Slip Chuck |
| Author | Gearge F.Pell |
| Notes | Simplyfying small difficult jobs with an assurance against drill and tap breakages. Details of its construction, applying the tool in the workshop |