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In many instances it is desirable to provide a quick-acting means for allowing rotation of a member in a typewriter or for inhibiting such motion. Such a device is illustrated in the drawing.
English (United States)
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Work Transfer and Holding Device for a Typewriter
In many instances it is desirable to provide a quick-acting means for allowing
rotation of a member in a typewriter or for inhibiting such motion. Such a device
is illustrated in the drawing.
As shown, a ratchet or other output device 10 is inhibited from movement by
a member 11 which is held in engagement with the teeth 10a of the ratchet 10 by
a biasing spring 12. The core 13 of the member 11 is housed within the yoke 14
of an electromagnet 15. As is conventional, the electromagnet 15 includes an
energizable coil 16. An input member 17 also having a core 18 is connected
through a lost motion slot 19 to a rocking arm or the like 20 which receives its
input motion in the direction of the arrow 21 from an oscillating or rotating cam
(not shown). When the coil 16 is off, the input member 17 reciprocates within the
electromagnet 15. When coil 16 is energized, the input member core 18
attaches to the core 13 of the member 11 and withdraws it into the
electromagnet, allowing the ratchet 10 to escape.
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