AMERICAN INSTITUTE. 119 



"K and L are accurately fitted Steel Jaws, moving in dovetail 

 grooves, lengthwise, the face of the Chuck, by turning the screws 

 M, N. The ends of these jaws are square, with a small notch 

 across the face to receive the pinion, and is adjusted to centre by 

 moving the above screws. 



"Fig. 3, is a Universal Head. S, S, S, are the usual Clamps 

 for holding plates. It has a shaft on the reverse side, same as the 

 pivot chuck, and is secured on the Mandril in the same way." 



[Jl bronze medal awarded. 



(MACHINERY No. 3.) 



MACHI>7ES FOR WORKING WOOD. 



Woodbury'' s Planing, Tongucing and Grooving Machines. 

 James A. W^oodbury, Winchester, Mass. 



These machines are got up with patent expansion feed roller 

 geai-s, upon each end of the feed rollers, so as to plane from one- 

 fourth of an inch to five inches in thickness, without any ch-ange 

 of gears. Patent double adjustment of the edge cutters, so as to 

 plane, tongue and grove upon each side the machine. Patent 

 mouth-piece presser bars upon both the surface and edge cutters, 

 which entirely prevent all possibility of tearing either the surface, 

 tongue or groove, upon any kind or quality of lumber. Double 

 side rods, and indexes so as to adjust the edge cutters at the feed 

 end of the machine. Composition boxes. Gum metal edge cutter 

 cylinders. 



There is in these maciiines, aside from the above improvements, 

 everything that tliere is in any Woodworth machine. 



These machines are organized for simplicity of construction, 

 conv<'nience of adjustment, strength and durability. 



[.'•2 gold medal awarded. 



Jones S)' CrowcU's IJghfning Planer^ Tonguer and Groover. 

 B. M. Crowell 5 Worth street New-York. 



The 'engraving re[»resents one of Jones & CrowelTs pinning 

 machines, v.liich c(nnl)hies all the valualde puiuls of llie Wood- 

 worth }>laner, witli additional ini])roveMients. The i)oints (jf supe- 

 riority here alluded to, are as follows : The machine is self adjust- 

 ing; it will plane stuff from one-eighth of an inch to seven inches 

 in thickness, on either one or both sides of the board, and may be 



