| Year | 1949 |
| Date | 07-Apr |
| Volume | 100 |
| Issue | 2,498 |
| Page | 418 |
| Category | Drawing |
| Part | |
| Title | A Simple Draughting Machine |
| Author | T.J.Lewis |
| Notes | General arrangement, constructional details, an exploded isometric drawing of the scale head, clamping bracket, positioning the protractor, the bracket assembly |