| Patent Number |
Title Of Patent |
Date Issued |
| 4859918 |
Method and apparatus for producing a speed control voltage for direct current motors in typewrit |
August 22, 1989 |
| A method and means for producing a control voltage for controlling a direct current motor makes use of a tachometer voltage providing two ninety degree phase shifted tachometer signals. From these are derived four coding signals comprising the tachometer signals and their inverse sig |
| 4842429 |
Type face striking system in an office writing machine |
June 27, 1989 |
| A type face striking system for striking a type face to produces an imprint on a record carrier in a writing machine, the system including; an electromagnetically actuatable printing hammer movable under the influence of an electrically generated magnetic field between a rest position an |
| 4820125 |
Ribbon device for typewriters or similar office machines |
April 11, 1989 |
| An end-of-ribbon sensing device for an office machine, which machine includes a printing station for receiving a nonreusable ribbon which is displaceable through the printing station and which has a scannable marking at its trailing end. The device includes: a receiving member mounte |
