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:
Nov. 19, 1985
Filed:
Jun. 14, 1983
John S Heath, Winchester, GB;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A print head assembly with interchangeable pluggable printed circuit print heads has means for automatically positioning a head during insertion with the aim of ensuring registration of printed circuit electrodes on the head with correspondingly positioned conductors on a body portion. The print heads are supplied as a variety of types all of which are interchangeable as a simple push-fit in the body portion. A clamp ensures that ohmic contact is established and maintained between the registering electrodes and conductors. Each head is also provided with a pattern of electrodes which serve to identify the head type. The pattern bridges selected additional conductors on the body portion and provides a decodable pattern of signals in response to an interrogate signal unique to heads of that type. One of these electrodes on the head shorts a control conductor on the body portion to one or other of two adjacent guard conductors, if lateral misregistration of the head within the recess exceeds a predetermined amount.