Abstract: A gear hub for flexible gear couplings wherein the teeth of said hub are cut while the hub is being moved constantly through all of the positions that the hub would assume relative to the sleeve during operation with the hub shaft misaligned with the sleeve at the maximum angle of misalignment for which the coupling is designed.

Abstract: A fixture for manufacturing hubs for flexible gear couplings wherein the teeth of said hub are cut while the hub is being moved constantly through all of the positions that the hub would assume relative to the sleeve during operation with the hub shaft misaligned with the sleeve at the maximum angle of misalignment for which the coupling is designed.

Abstract: A method of manufacturing hubs for flexible gear couplings is disclosed wherein the teeth of said hub are cut while the hub is being moved constantly through the position that the hub would assume relative to the sleeve during operation with the hub shaft misaligned with the sleeve at the maximum angle of misalignment for which the coupling is designed.

Abstract: A clutch is disclosed having an input shaft and an output shaft and having alternate pairs of discs interfitting with each other. Half of the discs being attached to the input shaft and half to the output shaft. The discs are knurled on one side in a grooved pattern. The knurling is deeper at the inner radius than at the outer radius so that there is a major restriction to oil flow from the inner radius to the outer radius. The restriction of the grooves insures that the grooves are completely filled with oil during operation of the clutch.

Abstract: An overrunning clutch made up of an input member and an output member with locking means between them for positively locking the two members together and a racheting member on the input for moving the locking member from a position to positively lock the input member to the output member when the input member rotates at a higher speed than the output. The clutch has an improved mechanism for engagement of the drive and driven parts.

Abstract: A synchronizing clutch made up of a quill shaft, a hub, a toothed sleeve for connecting the hub to the shaft and a clutch between the sleeve and the hub for synchronizing the speed of the hub with the speed of the sleeve prior to connecting the hub teeth to the shaft teeth. Drive pins are provided on the shaft for preventing the teeth from interfering at synchronization and an improved adjusting means and a retaining ring provide a space for the clutch discs so that the axial position of the clutch discs relative to the drive pins prior to synchronism is always precisely known.

Abstract: A gear coupling and oil actuated synchronizing clutch is disclosed. The oil is connected to the clutch by a static seal ring freely supported on the drive shaft, next to a shaft flange. The seal ring has a piston groove containing a piston ring adjacent the flange overlying a narrower groove in the flange. Engage oil in the static seal groove forces the piston ring against the flange and holes in the piston ring conduct oil to the flange groove and then to the disc pack and clutch actuating mechanism. The disc pack has a larger inlet than outlet so that the engage oil fills the pack introducting a viscous drag to the discs and initiating action of balking mechanism. Drive pins are advanced into kidney shaped holes where they form an interium connection after synchronism and before gear engagement so that the drive gears can freely register with the driven gear.