SPECIAL MERITS OF EXHIBITS, 143 



faces that break up the clay perfectly and also any stones that may be in it against 

 an apron that vibrates to and from the cylinder. The vibrating apron is worked 

 by a friction pulley. There is no gearing and no noise. 



Improved Tiffany Tile Machine, by N. Brewer & Co., Tecumseh, Mich. This is an 

 "auger" mill with a vertical pug mill, which is claimed to have some important 

 points of excellence; a prominent one being that it tempers the clay in a superior 

 manner. The clay in passing through the pug mill is cut up and worked by the 

 knives in the usual way, when it is received by the auger that forces it out through 

 the dies, which, it is claimed, gives it a double working. This is important, as 

 good work can not be made of poorly tempered clay. Another claim Ls, that in 

 this kind of mill no budge or bracket is needed, for attaching a core piece to, for 

 forming the inside of the tiles, which necessarily splits the stream of clay, and 

 where clays do not unite or "weld" readily defective work is often done. This 

 machine produced beautiful work, is well and strongly made, and seems capable of 

 standing any reasonable strain. 



Quaker Brick Machine, by Fletcher & Thomas, Indianapolis. This machine was 

 on exhibition, but not having seen it at work, and being unable, after repeated 

 calls to get any information about it, can say nothing about it, except that it seems 

 to be a mud and sand machine, and in this respect differs from all others on exhi- 

 bition. They also had their new Spiral Pug Mill in connection with brick ma- 

 chine, but could get no information about it, except the certificates of a number of 

 persons who recommend it as doing its work perfectly, dispensing with soak pits, 

 and two or three hands that are required with the usual arrangements. 



The Force Feed Brick and Tile Machine, by the Wallace Manufacturing Company 

 Frankfort, Ind. In this machine a double screw feed is used, one over the other, 

 the upper one is cleared of its clay by an automatic scraper connected to a piston 

 which is operated by a crank, and forces the clay into the lower screw, making a 

 positive forced feed. The core piece, for forming the inside of the tile, is on the 

 end of the lower screw and revolves with it. » 



They also exhibit their Tik Table, which is an endless belt, with rollers length- 

 ways on either side of each section, with a belt around each pair that allows the 

 tiles to revolve without twisting them out of shape.' 



A.lso their Clay Crusher and Stone Separator. This consists of a pair of chilled 

 iron rollers running together, that have spiral grooves, or ribs, pitched either way 

 from the center, like right and left hand screws, that works any stones that may be 

 in the clay along the roller until it is discharged over the end, while the clay is 

 crushed in passing through between the rollers. 



Brick and Tile Machine, by J. W. Penfield, Willoughby, Ohio. This is one of their 

 No. 7 machines, which is a very strong, well-made machine, well calculated to 

 stand the strains incident to this business. A four-inch steel shaft, that has four 

 bearings, carries the knives in the pug mill, the cam that moves the plunger, and 

 the wheel that drives them. The cam is used to drive the plunger, as it may be 

 made to give a regular and uniform motion to it, and operates against steel fric- 



