Keyboard, Magazine and Connections.
Figure 31 shows all parts at rest and Fig. 32 the parts in motion after key lever A has been touched and the cam D has made one-half revolution. In Fig. 31 the cam and yoke D is supported about 1-16 inch above the rubber roller E by the trigger C, which intersects the keyboard keybar B at point 3.
The key rod G, which is suspended from the verge I at point 8, comes down to about 1-16 inch from cam yoke at point 6. Note that point 4 on cam D is only about one-half as far from the journal pin or cam bearing as point 7. Now, suppose the rubber roll to be revolving and key lever A pressed down, this will in turn raise the keybar B and throw out the trigger C from the cam at point 5 and allow the cam to strike the revolving rubber roll E at point 4, which would cause the cam to turn.
Now suppose we stop the rubber roll when the cam D has reached point 7 and we get the result as shown in Fig. 32, i. e., the cam yoke at point 6 where the rod G rests will be raised high enough to raise the upper end of rod G at point 8 enough to allow verge pawl L to release the matrix M, which in Fig. 31 was held in its place in the magazine by the verge pawl, then in Fig. 32 the upper verge pawl K will hold the second matrix N and prevent it from following the first matrix M out of the magazine. When the cam D has completed its revolution or again come round to point 4 all the parts will have come back to the position shown in Fig. 31, except that the matrix M will have gone to the assembler and matrix N have taken its place. When the rod G is raised (as explained) to its position in Fig. 32, the verge I is raised by spring J and brought back again by the rod G, which is returned by the coiled spring H and the keyboard keybar B is returned partly by its own weight, which, if everything is clean, would be sufficient.
Fig. 31.
Fig. 32.