Printing device for calculating, accounting and si

专利名称：Printing device for calculating, accounting

and similar printing machines

发明人：Nicolo Giolitti,Michele Bovio申请号：US05/698923申请日：19760623公开号：US04077505A公开日：19780307

摘要：A dot-matrix printing device for a printing office machine, comprising a series ofstriking bars in the proximity of the recording medium movable transversely of themedium for printing dots in different locations. The bars are adapted to be actuated bythe armatures of corresponding electromagnets for impressing individual dots ofcharacters. The striking bars are guided in the proximity of the recording medium by amovable guide which effects the transverse movement and each electromagnet has afixed core and a movable armature in articulated engagement with the correspondingbar. Each armature is provided with an actuating spring which tends to move the armatureaway from the core of the electromagnet. A permanently magnetized rubber establishesa bias magnetic flux such as to keep the armatures at rest in opposition to the action ofthe actuating springs and a plurality of windings can be energized selectively to generatea 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 areloading member which acts on the armatures to bring them back into contact with thecores of the electromagnets.

申请人：ING. C. OLIVETTI & C., S.P.A.

代理机构：Schuyler, Birch, Swindler, McKie & Beckett

更多信息请下载全文后查看