. Science of railways . Fig. 4. Fig. 5. Exterior View. Sectional View. The Star Improved Locomotive Muffled Pop Safety Valve. the discharge when the valve pops will be greater orless correspondingly. MEADY MUFFLED LOCOMOTIVE POP SAFETYVALVE. The cut, Fig. 6, represents the Meady muffled loco-motive pop safety valve, showing its internal con-struction. It will be obser^-ed that the valve properprojects upward through the perforated casing ofthe valve, enclosing within it the spring which holdsit to its seat; and the upper or outward side of thevalve is open to the air at all times, so that when
. Science of railways . Fig. 4. Fig. 5. Exterior View. Sectional View. The Star Improved Locomotive Muffled Pop Safety Valve. the discharge when the valve pops will be greater orless correspondingly. MEADY MUFFLED LOCOMOTIVE POP SAFETYVALVE. The cut, Fig. 6, represents the Meady muffled loco-motive pop safety valve, showing its internal con-struction. It will be obser^-ed that the valve properprojects upward through the perforated casing ofthe valve, enclosing within it the spring which holdsit to its seat; and the upper or outward side of thevalve is open to the air at all times, so that when 230 LOCOMOTIVE APPLIANCES. the valve is discharging it is free from any pressureof the out-going steam, which escapes through theperforated casing into the openair without a disturbing noise. By this design there is no backpressure on the valve, and itscomponent parts so co-operatethat the valve rises when it opensto a greater height than is usualin valves of this character. For tension of the spring andthe adjustment
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