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In this case the form of the teeth upon the worm wheel varies at every point in its length as the line of centres is departed from.

A worm wheel and two eccentrics are machined up out of one piece and serve to operate the plungers.

To discharge the dough, the trough was tilted by means of a worm and worm wheel, the latter being secured to the trough.

The centre boss is keyed to the spindle, which passes through the deck and carries at its lower end a coupling for connecting to the worm wheel gear.

The polar axis is fitted with worm wheel and worm for slow motion.