Patent · US Expired

Type disc typewriter with electronic positioning control

US4334790A · kind A · utility

2Cited by

4References

4Claims

0Family size

Assignee

Triumph Werke Nurnberg A.G.

Inventors

Manfred Link · Nuremberg, DE
Diethelm Puch · Nuremberg, DE
Peter Zahner · Markt Indersdorf, DE
Karel Suc · Oberasbach, DE

Key dates

Filing date	Dec 3, 1979
Grant date	Jun 15, 1982
Priority date	—
Expiry date	Dec 3, 1999

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J7/54
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Keyboard generated signals are digitally encoded and converted to varying voltages for application to a coil for generating magnetic forces. The magnetic forces act on a spring mass system including a type disc to rotate the type disc to a selected angular position. The rest position of the disc at any selected angular position is established when the applied magnetic force and the force of an oppositely acting spring reach equilibrium condition. The spring stores or releases energy according to whether the applied magnetic force is greater or less than the existing spring force. The parameters of the system are so chosen that movement from one angular position of rest to another is smoothly accomplished in a given time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.