| Year | 1940 |
| Date | 12-Sep |
| Volume | 83 |
| Issue | 2,053 |
| Page | 209 |
| Category | General |
| Part | |
| Title | A Memorandum of Minor Mechanisms |
| Author | B.C.J. |
| Notes | Hints for the experimental and model engineer. Rack and pinion (typical, applied to fuel ignition pump, an intended application), ratchet and pawl (typical, spring applied to pawl), quadrant and chain (device and mechanism), lever and pulley |