| Year | 1930 |
| Date | 24-Jul |
| Volume | 63 |
| Issue | 1,524 |
| Page | 77 |
| Category | Electrical |
| Part | 3 |
| Title | Electric Motor Installation and Management |
| Author | A.H.Avery |
| Notes | Section of single-race ball journal bearing (Skefko), heavy type roller bearing, self-aligning ball journal, commutator of direct-current motor, cartridge type brush holder, box type, terminal leads (B.K.B Electric Motors), protected terminal boxes, brass socket cable ends (Davis & Timmins), terminal block of moulded insulation with brass connectors (Ebonestos) |