But to guard against sticking from dirt or other causes: The keyboard keybar spring F (sometimes called the comb spring) is attached and intersects the keybar B at point 2. R shows a sectional top view of keyboard rod lower guide T as the slot 10 should be when new, and S shows same when it is badly worn by the motion of the keyrod G.
When guide slot is worn as shown at 11 (Fig. 32) the keyboard rod is apt to bind and the spring H would not be strong enough to bring the rod back to its position. The guide T should then be renewed and the old one repaired at leisure, by soldering a piece on the bottom and cutting new slots.
These parts will give no trouble if care is taken to keep them clean.
The Metal Pot.
Fig. 33.
Figure 33 shows a sectional view of metal pot and well; also mold-disk, with a line of matrices assembled in front of mold ready to cast a slug.