July 1, 1914.] 



THE INDIA RUBBER WORLD 



557 



bed and as they pass under the rapidly revolving hammers 

 the ends of the latter remove the bark by knocking it off in 

 large or small pieces, or at least loosening it so that it is 

 subsequently easily removed. 



LUBRICATING BOX FOR CALENDER ROLLS. 



'T'HE accompanying drawing shows an end section of a calender 

 •^ roller equipped with a special form of lubricating device. 

 The roller has moimlcd in connection with it the bearing blocks 

 A, which are carried by the housings of the machine. The 

 hollow boxes B are concentric with the roll neck C and are 



Dootson's C.vlender Roll Lubric.'\tor. 



placed in contact with it. at the same time resting upon the 

 blocks A. The whole or a portion of the inner faces D of the 

 boxes B' which are in contact with the roll neck C, is perforated 

 and lined with wire gauze, through which solid lubricant is fed. 

 Wlien the gauze is of comparatively fine mesh the lubricant 

 passes less readily to the surface of the roller, and thus the 

 whole of the lubricant is fed in required quantity to the roller 



by varying the mtsh of the gau/.e. Tlie boxes are filled with 

 solid lubricant through opcnmgs li, which are covered by sliding 

 doors. They are also provided with a lining of asbestos r to 

 prevent the lubricant from melting too quickly. The practice 

 of mounting a receptacle containing lubricant in contact with 

 a revolving shaft is riot new, but the feature of this lubricator 

 is that the gauze conies in contact with the roller and lubricates 

 it according to the size of the mesh. [Harold Dootson, BuUfield, 

 Bolton, England.] 



GIANT MAGNETIC COUPLINGS FOR RUBBER MILL. 



IK the June number of The India Rubber World appeared an 

 article illustrating and describing the Cutler-Hammer mag- 

 netic clutch and automatic safety brake, which has been installed 

 in several rubber mills. The Woonsocket Rubber Co., of Woon- 

 socket, Rhode Island, has recently installed in its plant five of 

 these clutches, the largest magnetic couplings ever built. One 

 is 72 inches in diameter, while the other four are each 68 inches 

 in diameter. Their enormous holding power may be realized 

 from the fact that the 72-inch size is capable of transmitting 

 44.600 pounds torque at one foot radius, or 849 horsepower at 

 100 r. p. m. The 68-inch couplings transmit 34,440 pounds 

 torque at one foot radius, or 655 horsepower at 100 r. p. m. 



The accompanying sketch shows diagrammatically the gen- 

 eral arrangement of that part of the mill in which these couplings 

 are installed. A represents a Rice & Sargent tandem compound, 

 20 X 40 x 60 steam engine running at 65 r. p. m. The large 

 72-inch coupling is shown at B, while C represents the safety 

 brake, which is automatically applied to stop the mill the instant 

 that the coupling circuit is broken. The construction and opera- 

 tion of these parts were explained in detail in the article referred 

 to above. This coupling drives the mixer D. One of the 68-inch 

 couplings is shown at E, driving the mixer F. This second 

 coupling is driven from the engine shaft through gears G. Av 

 H is sliown a Corliss tandem compound, 20 x 40 x 60 steam 

 engine, running at 65 r. p. m. This engine drives three 68-inch 

 couplings /. / and K, which drive respectively the calenders 

 L and M and the refiner A'^. 



The contract with the manufacturers of these magnetic coup- 



cMM 



-V- 



F 



D 



cMK 



N 



-V- 



mm 



^ n 



\ 



^ 



l=a 



H 



y 



yA 



t^ 



^^ ]:s=a ]&=&4: 



L 



Di.\GRAM Showing Magnetic Clutch and Safety Brake Installation in Rubber .Mill. 



