US 4,398,838 AGranted

Typewriter ribbon lifting and transporting device

AssigneeTriumph-Adler A.G. fur Buro- und Informationstechnik

InventorFriedrich Teichmann

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Abstract

The invention is a mechanism for raising and lowering the ribbon in typewriters to make typed text visible. No separate drive such as a motor or magnet is required to raise the ribbon. The ribbon is raised by means of a spring-loaded bar prior to each character reproduction. To accomplish this, an armature of a control magnet releases a pivoting lever and the spring loaded bar. A pin wheel, driven by a motor and acting on the lever serves to return the bar and allow return of the ribbon. The motor is energized after each character reproduction to advance either a type element carrier or the paper carrier by one character space. In typewriters with ribbon spools fixed to the machine frame, the ribbon spool drive also can be derived from the spring powered bar.

Claims5

Dependent claims

In a typewriter having a carriage mounted for movement in escapement and carriage return directions,

a carriage drive, and
means coupled to said motor for driving said carriage in escapement direction upon energization of said motor incident to each character print action,
ribbon guide means movable from a lowered position to an elevated position and from its elevated position to said lowered position incident to each character print action,
spring powered means coupled to said ribbon guide means operable when released from a latched position to move said ribbon guide means from its lowered position to its elevated position,
latching means releasably holding said spring powered means in a latched position,
an electromagnet momentarily energizable incident to each print action for releasing said latch means, and
restoring means coupled to said motor for restoring said released spring powered means to latched position upon energization of said motor incident to a print action.

4 more elements

Dependencies are inferred from the claim text.