Canadian machinery and metalworking (July-December 1917) . s in Fig. 5. Metal saws forslotting screws generally have to be sort-ed out and tried in a thickness gausje be-fore the right size for a certain diameterof screw is found. The size for whichthey may be used should be stamped onas shown in Fig. 3. Collars that areused in milling machine arbors suggestthemselves as instances in which figuresare improperly placed, because they can-not be seen when fastened on the arbor,especially between two cutters. A greatmany times the wron? collar is put on,or the need of making sure of this isoften n
Canadian machinery and metalworking (July-December 1917) . s in Fig. 5. Metal saws forslotting screws generally have to be sort-ed out and tried in a thickness gausje be-fore the right size for a certain diameterof screw is found. The size for whichthey may be used should be stamped onas shown in Fig. 3. Collars that areused in milling machine arbors suggestthemselves as instances in which figuresare improperly placed, because they can-not be seen when fastened on the arbor,especially between two cutters. A greatmany times the wron? collar is put on,or the need of making sure of this isoften necessary, and they have to be pipe and sleeves did not prevent the manin charge making a proper and perman-ent repair. © A DRAWING TOOL TRAY By A. M. accompanying sketch shows a veryhandy tray for holding drawing instru-ments. Draftsmen are well aware of theinconvenience of having tools spread outon a drawing board. It is usually neces-sary to pick up each one when taking upa drawing or when cleaning off theboard; by this arrangement the tools can. DRAWING TOOL, TRA*V. always be kept together and carriedabout from one board to another. Thetray is made of white wood, shellacedover. The ink bottle fits into a hole inthe shelf to prevent it from being upset July 12, 1917. CANADIAN MACHINERY 37 and spilled. The shelf can also be usedfor holding thumb tacks, erasers, andothers small accessories. A tray of thedimensions given, takes up very littleroom and is easily moved about. HANDY RULE FOR FINDING CON-TENT OF CYLINDRICAL TANKSBy C. T- THE following table is useful in arriv-ing at the contents of cylindrical tanksplaced horizontally, , with the twocircular ends standing vertically. Thediameter referred to is one passing ver-tically through the centre of the circu-lar end. The table can be used for find-ing how much has been run off (up toone half) if the percentage of the diam-eter be counted from the top of theddameter. If the measurement alongthe diameter be made from
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19
