(under subclass 663) Subject matter wherein a typewriter is provided with an interlock mechanism that prevents any movement of any key* element when the lock mechanism is effective.
(1) Note. In this subclass a lock mechanism acts on an interlock mechanism to cause the interlock mechanism to be effective to prevent movement of any of the keys. Stated differently, the lock mechanism controls the interlock mechanism, but the interlock mechanism does not control the lock mechanism.
(2) Note. For a discussion of the difference between a "lock" and an "interlock", see (1) Note of subclass 663.
