| Year | 1945 |
| Date | 01-Mar |
| Volume | 92 |
| Issue | 2,286 |
| Page | 202 |
| Category | Locomotive |
| Part | |
| Title | Brakes |
| Author | W.B.Hart |
| Notes | Some notes on a somewhat neglected subject. Proportional exhaust valve, diagram of relative positions of driver's handle and valve pins, proportional inlet valve "vacuum" type with eccentric cam, "Westinghouse" type with swash-plate cam |