. The universal assistant, and complete mechanic : containing over one million industrial facts, calculations, receipts, processes, trade secrets, rules, business forms, legal items, etc., in every occupation, from the household to the manufactory. ne and a half foot per sec-ond. To form a table of speed from these data is a mere matter ofmultiplication. Example:—A train going 70 miles an honr travel*pet second 1 and 7-15 it. multiplied by 70^102 aad two thiids feet AND KSQINEKRS* DEPABTMKNT. 409 The Stephenson Link and Valve Gear of 1833, shown in tha•ut, differs but little from t
. The universal assistant, and complete mechanic : containing over one million industrial facts, calculations, receipts, processes, trade secrets, rules, business forms, legal items, etc., in every occupation, from the household to the manufactory. ne and a half foot per sec-ond. To form a table of speed from these data is a mere matter ofmultiplication. Example:—A train going 70 miles an honr travel*pet second 1 and 7-15 it. multiplied by 70^102 aad two thiids feet AND KSQINEKRS* DEPABTMKNT. 409 The Stephenson Link and Valve Gear of 1833, shown in tha•ut, differs but little from the arrangement of the present day, asexhibited on page 4U2. In the sketch, A A represents the eccentric*keyed on the driving-shaft B, O is the link, and D the strap-linkconn°cted with the eccentrics by the rods E E, as shown in cut. F iathe valve and G the valve-rod working slide-valve and connected withlink-block. The elevation or depression of the link, necesgary to in-duce a backward or forward movement of the engine, was effected bya lever handle H. fitted with a catch which could be dropped into aseries of notches in the sector I; this lever-handle operating by meanaof the reaching-rod K, and the counter-weighted bell-crank h, had. the effect of bringing the pin on the link-block connecting with thevalve-stem into operation with either eccentric as the forward orreverse movement of the engine might require. The lever as shownat H, shows the link in full gear for reversing; at I (mid-gear) steamwould be shut off, as the valve would cover both steam-ports; at Mthe lever would be in full-gear for running fori^ard, and in inter-mediate positions between mid-gear and full-gear the effect would bemore or expansion of the steam, but never the full power. The locomo:ive. with its entire connections and Burroimdinga,should, while on the road, be the object of a care and vigilance whichknows no weariness. Before starting from a station, the engineBhould be closely inspect
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Keywords: ., bookcentury1800, bookdecade1870, booksubje, booksubjecttechnology
