506 



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. 



