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Early boiler safety valve

Early boiler safety valve

Safety Valve, Ross 'Pop' Type. Sectioned Brass & Steel, Dimensions: 11"high x 9" diam.

Safety Valve

Locomotive muffled "pop" safety valve, sectioned, patented by G.Crosby between 1875 and 1905.

Locomotive muffled "pop" safety valve

1875-1905

Ross "Pop" safety valve, sectioned, patented by R. Ross in 1902 and 1904.

Ross "Pop" safety valve

Safety Valve, Hackworth's multi-leaf spring type, small, 1818-1838.

Multi-leaf spring safety valve

1818-1838

Safety valve, Ross 'Pop' valve, brass cylinder sectioned to show internal spring.

Ross "Pop" safety valve

Safety valve, Ramsbottom type.

Safety valve

Safety valve for chain testing machine by Greenwood and Batley. Leeds, c. 1882

Safety valve for chain testing machine by Greenwood and Batley

1882