RECENTLY PATENTED INVENTIONS. Engineering. Kansas City Mo. This invention is for an improvement designed to facilitate the working of smelting or stack furnaces with less draught the gases being caused to rise uniformly and pass to the downtake flue with compara tively little resistance whereby the loss of precious met als in the fumes and flue dust is reduced to a minimum. The invention consists principally of a removable hood adapted to be set on the top of the stack and provided with a flue for connecting with the downtake flue separate from the stack. The feed floor is not obstructed and
RECENTLY PATENTED INVENTIONS. Engineering. Kansas City Mo. This invention is for an improvement designed to facilitate the working of smelting or stack furnaces with less draught the gases being caused to rise uniformly and pass to the downtake flue with compara tively little resistance whereby the loss of precious met als in the fumes and flue dust is reduced to a minimum. The invention consists principally of a removable hood adapted to be set on the top of the stack and provided with a flue for connecting with the downtake flue separate from the stack. The feed floor is not obstructed and the comparatively low hood takes up but little room and does not interfere with the draught of the fur. nace. Voorhees Brooklyn N. Y. This is a tool in which a tube is arranged to be fed through a conducting sleeve and has opposite openings through which are fed cutters a tapering expanding device working between the shanks of the cutters. The tool may be loosened within the tube and its cutting edges may be brought into greater or lees contact with the inner surface not only for the purpose of removing the scale but to the extent if de sired of removing a shaving of metal from the interior of the tube. The tool is readily fed lengthwise of the tube at the desired speed and the adjustment of the cut ting portion of the tool is easily effected. Railway Appliances. tension step which may be conveniently folded when not in use under the usual platform step of the car. On the outside of the risers of the fixed steo are hangers car. ryine bearings for hubs on brackets carrying the exten sion step a swinging arm engaging a locking bolt to lock the pivoted step in lowered position or to fold it urder the fixed step either operation being effected by the movement of a hand lever on the car platform. Vernon. Ind. This is an inexpensive easily applied de vice by which to securely lock the nuts of rail joints and of bridges vehicles etc. The nut is provided with seats in the form of an ann
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