| 摘要 |
Non-slipping clutch disposed between the drive and transport mechanism and between the drive and control cylinder for triggering printing in franking machines, including a shaft, a locking wheel being mounted on the shaft and engaged by the drive, internal gearing having an odd number of teeth formed on the locking wheel, a bushing being disposed on the shaft and connectible to the transport mechanism and control cylinder, a locking gear disposed on the bushing opposite the locking wheel, teeth disposed on part of the periphery of the locking gear, two pawls being disposed in the locking gear and extended into the locking wheel for engaging the internal gearing, a lever rotatably disposed on the bushing adjacent the locking gear, fingers being integral with the lever and engageable with the pawls, a torsion spring for rotating the lever and fingers to push the pawls into the internal gearing and couple the locking wheel and locking gear, and an electro-magnetically controlled latch for preventing the lever from being rotated by the spring, the locking gear being sliplessly rotated by the drive engaging the locking wheel after initial rotation of the locking wheel. |
