156 



HANDBOOK OF MECHANICAL DESIGN 



Band \ 



Flange ^^ A -»-| 

 Leai-her ^3^ 



'cross ^ 



Section A-A " 



Fig. 275. — Similar to Fig. 274, being quiet in 

 operation and used for low torques. Tliis is also 

 a design of Charles Bond Company. The floating 

 member is made of laminated leather and is shaped 

 like a cross. The ends of the intermediate member 

 engage the two cored slots of each flange. The 

 coupling will withstand a limited amount of end 

 play. 



Fig. 276. — Pins mounted in flanges are connected by 

 leather, canvas, or rubber bands. Coupling is used for 

 temporary connections where large torques are transmitted, 

 such as the driving of dynamometers by test engines. This 

 type allows for a large amount of flexibility in all directions, 

 absorbs shocks, but requires frequent inspection. Machines 

 can be quickly disconnected, especially when belt fasteners 

 are used on the bands. The driven member lags behind the 

 driver v/hen under load. 



iLeaiher belf 



Cable Ir'nks 



Fig. 277. — This Bruce-Macbeth Engine Company coupling 

 is similar to that of Fig. 276, except that sL\ endless wire cable 

 links are used, made of plow-steel wire rope. The links engage 

 small metal spools mounted on eccentric bushings. By turning 

 these bushings, the links are adjusted to the proper tension. 

 The load is transmitted from one flange to the other by direct 

 pull on the cable links. 



Fig. 278. — This Webster Manufacturing 

 Company coupling uses a single* endless leather 

 belt instead of a series of bands, as in Fig. 276. 

 The belt is looped over alternate pins in both 

 flanges. This type has good shock-resisting 

 properties because of belt stretch and the 

 tendency of the pins to settle back iuto the loops 

 of the belt. 



'Endless ropes - - _ f ''"^ 



Fig. 279. — This coupling made by the Weller 

 Manufacturing Company is similar to the design in 

 Fig. 278, but instead of a leather belt uses hemp rope, 

 made endless by splicing. The action under load 

 is the same as in the endless-belt type. 



Leather link 

 Fig. 280. — This Bruce- Macbeth design uses leather 

 links instead of endless wire cables, as shown in Fig. 277. 

 The load is transmitted from one flange to the other by 

 direct pull of the links, which at the same time allows for 

 the proper flexibility. 



