. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . THE AlK ISKAKE S OIIICKS AND WORKS .\T , ONTARIO, CANADA. Fig. I shows an ingenious device at-tached to the throttle valve of a sta-tionary engine, for instantly stopping theengine in case of danger to life or ma-chinery. A cylinder l54-in. diameter byi2-in. long is placed below and at oneside of the throttle valve stem. The tophead of this cylinder has a square hole,through which passes a i-in. square pis-ton rod, having teeth cut on the side. FIG. 1. THROTTLE
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . THE AlK ISKAKE S OIIICKS AND WORKS .\T , ONTARIO, CANADA. Fig. I shows an ingenious device at-tached to the throttle valve of a sta-tionary engine, for instantly stopping theengine in case of danger to life or ma-chinery. A cylinder l54-in. diameter byi2-in. long is placed below and at oneside of the throttle valve stem. The tophead of this cylinder has a square hole,through which passes a i-in. square pis-ton rod, having teeth cut on the side. FIG. 1. THROTTLE VALVK BYAIR PRESSURE. next to the throttle stem. These teethengage a 4-in. gear wheel keyed on thestem, and permits throttle to be openednearly one turn. At convenient pointsin the different departments a J| is placed, which, when opened, ad-mits air to the bottom of the cvlinder. by 6-in. stroke, place above it, the pis-ton rod from the lower cylinder passingup and connecting to the plunger in thewater cylinder. Air is admitted bymeans of a 3 way cock (4), having ai-32-in. port, to under side of the lowerpiston and forces it upward, therebycompressing the water above the plungerin the upper cylinder and creating suffi-cient pressure to test any gauge in or-dinary use, a small coil spring is attachedto the piston rod, drawing it back tonormal position when air pressure is• xleased. This makes a very neat andonvenient arrangement, is very steadyin its action and does not interfere withuse of lever handle pump when air pres-sure is down. Figs. 3 and
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
