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:
Jun. 13, 1989
Filed:
Nov. 19, 1987
Applicant:
Inventor:
Victor B van Blerk, San Jose, CA (US);
Assignee:
Verbatim Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 69 ; 360 60 ;
Abstract
A defeat mechanism serves to prevent a floppy disk cassette from being operatively loaded into a drive mechanism when the cassette has been subjected to either a high-moisture or a high-temperature condition--either environment being potentially harmful to the recording capability of a floppy disk. The defeat mechanism includes a wax which melts in a high-temperature environment and a hygroscopic salt which breaks down in a high-moisture condition. If either the wax or the salt changes from a solid form, a control element of the defeat mechanism automatically moves into an actuated position which prevents the operative loading of the cassette.