. Farmer and stockbreeder . (3)damper, (4) milled head screw, (5) capsule, (6)regulating rod, (7) sliding adjustable balanceweight, (8) water tank, (9) exit for lamp fumes,(10) fulcrum, (11) egg drawer, (12) regulatingarm, (13) flue. The dotted lines in diagrams A and B repre-sent the course followed by the heat generated bythe lamp. The amount of lift of the damper isregulated in the first instance by adjusting themilled head screw, and for finer adjustments bymeans of the sliding balance weight. For the sake of simplicity in the diagrams theflue is shown passing straight through the watertan
. Farmer and stockbreeder . (3)damper, (4) milled head screw, (5) capsule, (6)regulating rod, (7) sliding adjustable balanceweight, (8) water tank, (9) exit for lamp fumes,(10) fulcrum, (11) egg drawer, (12) regulatingarm, (13) flue. The dotted lines in diagrams A and B repre-sent the course followed by the heat generated bythe lamp. The amount of lift of the damper isregulated in the first instance by adjusting themilled head screw, and for finer adjustments bymeans of the sliding balance weight. For the sake of simplicity in the diagrams theflue is shown passing straight through the watertank, but in reality it passes through the tankand then doubles back again through the tank,the exit for the fumes being in the rear portionof the heater. METAL REGULATOR Another form of regulator is the thermostator metal regulator. This is used principally inmachines of American manufacture. This devico depends upon the varying expan-sion of different metals when heated. Theyusually consist of three pieces of metal about two. i agram feet in length and one inch in width, turneddown at their edges to prevent twisting. Thesethree pieces of metal are placed on top of oneanother and riveted together at their extremeends. The centre piece of metal is usually of steel and the two outer ones of zinc. When heatedthe zinc expands at a much greater rate than thosteel, causing them to bulge apart since their ejidsare fixed to one another. This bulging is i tilisedto raise the. damper from off the heater in asimilar way to which it is done in the thecapsule regulator. The top piece of metal isusually fixed firmly to the machine, so that allI he bulging takes place in a downward regulating rod in this case passes, throv>hholes in the two upper pieces of metal, but ispermanently attached to the bottom one. At tho
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondon, bookyear188
