. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 719. ORE ROASTING FUR-NACE. The ore fed from the hopperat the top is drawn alternately inwardand outward on the partition hearthsof the roaster by revolving arms withblades inclined to draw each way onalternate floors. The hot gases enterfrom the flue at the top and a
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 719. ORE ROASTING FUR-NACE. The ore fed from the hopperat the top is drawn alternately inwardand outward on the partition hearthsof the roaster by revolving arms withblades inclined to draw each way onalternate floors. The hot gases enterfrom the flue at the top and are dis-charged with the ore at the bottom ofthe roaster. Herreshoff Q R 720. ORE ROASTING FURNACE. Straight line type. ore enters from a spreading hopper at one end and is drawn by rabbles with teeth for alternate turning over of the oreduring its passagealong the furnace bedto the discharge rabbles are at-tached to a chain carrier and returned on the outside of the furnace grates are on the outside, distributed for equahzing theheat which passes off through a chimney at the feed hopper end. 721. MAGNETIC METAL SEPA-RATOR. For separating iron turn-ings, fihngs, and chips from brass com-position or other non-magnetic material. The drum is composed of the facesof a large number of magnets. Theiron adheres to the magnets and iscarried around the cylinder to a revolv-ing brush, w^hile the non-magnetic ma-terial drops from the front of the drumto a box.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
