The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1978
Filed:
Jun. 23, 1976
Nicolo Giolitti, Ivrea (Turin), IT;
Michele Bovio, Banchette (Turin), IT;
Ing. C. Olivetti & C., S.p.A., Ivrea (Turin), IT;
Abstract
A dot-matrix printing device for a printing office machine, comprising a series of striking bars in the proximity of the recording medium movable transversely of the medium for printing dots in different locations. The bars are adapted to be actuated by the armatures of corresponding electromagnets for impressing individual dots of characters. The striking bars are guided in the proximity of the recording medium by a movable guide which effects the transverse movement and each electromagnet has a fixed core and a movable armature in articulated engagement with the corresponding bar. Each armature is provided with an actuating spring which tends to move the armature away from the core of the electromagnet. A permanently magnetized rubber establishes a bias magnetic flux such as to keep the armatures at rest in opposition to the action of the actuating springs and a plurality of windings can be energized selectively to generate a flux opposed to the bias flux so as to allow the actuating springs to move the armatures away from the cores for impression of the dots. The device further includes a reloading member which acts on the armatures to bring them back into contact with the cores of the electromagnets.