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:
Jul. 11, 1989
Filed:
Dec. 15, 1986
Applicant:
Inventor:
Donald R Spaman, Middletown, CT (US);
Assignee:
Raymond Engineering Inc., Middletown, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
361151 ;
Abstract
A purge erase apparatus is presented to erase information stored on a magnetic disc. A multiplicity of coils are connected in parallel and are arranged around the disc to create a magnetic field having a region of maximum field intensity. When an erase signal is given, the information on the disc will be erased in one or two revolutions of the rotating magnetic disc through the region of maximum field intensity.