| Year | 1953 |
| Date | 16-Apr |
| Volume | 108 |
| Issue | 2,708 |
| Page | 470 |
| Category | Domestic |
| Part | |
| Title | A set of door chimes |
| Author | "Artificer" |
| Notes | Constructional details of a useful domestic appliance. Cutting the worm wheel, hobbing, tapered hobs, barrel arbor, worm, worm shaft bearings, contact-breaker cam |