| Year | 1955 |
| Date | 18-Aug |
| Volume | 113 |
| Issue | 2,830 |
| Page | 194 |
| Category | Pump |
| Part | |
| Title | Rotary Pumps and Motors. Other Types of Positive Displacement Pumps |
| Author | "Artificer" |
| Notes | Savery annular piston pump, variable output type, Mono rotary pump, ghost sections, Hele-Shaw pump |