Page:Popular Science Monthly Volume 88.djvu/534

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��Popular Science Monthly

���By means of this new attachment, a shaper is converted into a power hack-saw machine

An Improved Hack-Saw Attachment

ANE\\' hack-saw attachment has recently been perfected which in- stantly converts a shaper into a power hack-saw machine. There are many ad- vantages to be found in this improved arrangement, one of them being the sav- ing of floor space and of the additional shafting space and extra pulleys that would otherwise be required.

The instant raising or lowering of the cutting edge of the hack-saw blade by elevating or depressing the tool-head of the ram, enables the operator to slit tool- steel, or any piece of work that will go in a shaper-vise, end up or lengthwise as desired. Since shaper-vises can be swiveled to any desired angle instantly, angle cuts at an}- degree can be made without loss of time, and the vise ca- pacity is thus greatly increased.

The vise-bed can be raised or low- ered at will, or it can be shifted from side to side. The wide range of adjust- ment of the shaper-bed renders it pos- sible to make cuts on large pieces of

��work which would otherwise require mounting on a milling-machine. Cuts can also be made at the same setting in dimensional relation to each other.

Perhaps the most important ad- vantage of all is the privilege of chang- ing the length of stroke of the blade. This can be operated by the ram-gage on the back of the shaper to drive the saw, from one-eighth of an inch up to and including the full length of the blade, whether it be twelve, fourteen or seventeen inches.

The connecting arm is simple in con- struction. It has a covered protector at its base which prevents the dropping of the frame itself at the completion of the cut. The lack of this feature in most hack-saw machines is of the greatest disadvantage, since the dropping of the frame causes the breaking of more blades than any other one thing.

This Lamp Shade Will Not Scorch

ADECORATI\'E silk lamp-shade which can be slipped in place over electric-light bulbs of ordinary sizes has been put on the market by an electrical manufacturer, who claims that, unlike most shades of this sort, the silk will not be scorched. The silk is fastened about a light wire frame, which is slipped eas- ily on to an incandescent bulb and held in place by spring clips. A disk of mica is put at the base of the bulb, so that in

���The electric bulb will not scorch the silk

case the socket has not been properly grounded, anyone touching the wire frame can not receive a shock, because of the insulative qualities of the mica.

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