HARDWOOD RECORD 



13 



NEW HARD KNIFE CYLINDER WITH (;.\I i;i: TdR SETTINCi KNIVES. 



and are staggereil on eaeh part of the head. 

 Each set of knives therefore cuts only half 

 the tongue or half the groove. The adjust- 

 ment of these heads can be made to a nicety, 

 not measurable even by a micrometer. A 

 wrench loosens the top or lock nut; the lower 

 nut, which widens or lessens the space be- 

 tween the disks bearing the cutter knives, 

 is then adjusted to the proper width of cut, 

 and the lock nut is turned to instantly hold 

 the disks in positive and accurate adjustment. 

 In connection with these heads two small 

 bench tools, herewith illustrated, provide 

 means wherebj' exact grinding of the bits 



-gp! 



NEW BENCH GRINDER FOR FITTING BITS 

 FOR LOCK NUT EXPANSION HEADS. 



can be done mechanically ; the second tool, 

 with equal accuracy, sets the bits so that the 

 cutting edge of each is in perfect alignment. 

 In other words, the combination of these 

 tools equips a mill man to perform mechan- 



ically what has heretofore been done by 

 ' ' rule of thumb. ' ' 



Another improvement marking an evolu- 

 tion of this great hardwood tool is a new 

 hard knife cylinder, pictured herewith. The 

 cylinder of solid steel is cut away, leaving 

 four projections accurately milled, to hold 

 in place and sustain the knife blades of hard- 

 ened steel, which are fastened to the projec- 

 tions by means of four bolts, threaded into 

 an under clamp. These knives are guaran- 

 teed to ' ' stand up " on hard maple, without 

 sharpening, for a run of twenty hours, and 

 are often used longer. A gauge, shown in 

 the illustration of the new hard knife cylin- 

 der, provides for the accurate setting of 

 these knives. The knives employed on this 

 cylinder are perfectly straight, a quarter of 

 an inch in thickness, and as the driving 

 weight and balance of the cylinder are prac- 

 tically maintained by the heavy projections 

 of the cylinder itself, there is no trouble 

 with the knives being out of balance. With 

 this top and bottom knife cylinder, the new 

 lock nut expansion heads, and the new ad- 

 justment provided for the side-head spindles, 

 a combination is formed for the accurate 

 working of hardwood flooring that never be- 

 fore has been accomplished in a woodworking 

 tool. 



Another marked improvement on No. 129 

 is revolving disk pressure rolls about eight 

 inches in diameter and half an inch in thick- 

 ness, which hold the two opposite edges of 

 the flooring strip in place, ,thus insuring ac- 



NEW LOCK NIT E.XI'ANSION HEADS WITH 

 SELF-CENTERINC! DEVICE. 



curate milling even if tlie strip is warped. 

 Of course it will be understood that this 

 machine works the flooring face down. 



While the foregoing text fully tells the 

 story of the modern and model tools of the 

 four-sided type for the making of maple and 

 other flooring, the subject should not be 

 jiassed without reference to a machine tool 



NEW TOOL FOR SETTING BITS ON LOCK 

 NUT EXPANSION HEADS. 



which was invented by ilr. Budlong, and 

 which is his special pri<le. It is the Amer- 

 ican Machinery Company 's edge matcher 

 which, although it has been in successful use 

 by numerous maple and oak flooring plants 



ROSENOW CO 



AMERICAN WOODWORKING MACHINERY COMPANY'S EDGE MATCHER— NEW AND IMPROVED TYPE, NEVER BEFORE ILLUSTRATED. 



