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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.:

US 4559530 B1

PDFFull Text
Date of Patent:
Dec. 17, 1985

Filed:

Oct. 05, 1982

Overcurrent condition display

Applicant:
Inventors:

Masao Ishigure, Gifu, JP;

Mitsuo Ota, Nagoya, JP;

Naotoshi Takaoka, Inuyama, JP;

Mitsuharu Kudomi, Konan, JP;

Assignee:

Takamatsu Electric Works, Ltd., Inuyama, JP;

Attorney:

Jordan and Hamburg

Primary Examiner:

James L Rowland

Assistant Examiner:

Daniel Myer

Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340664 ; 324133 ; 34081524 ;
Abstract

An overcurrent condition display suspended directly from a distribution cable for displaying overcurrent conditions in the cable and for promptly locating spots of accidents due to overcurrent conditions comprises a current sensor section having a current transformer, a drive section provided with a drive element adapted to be driven by the sensed overcurrent and with a force storage member adapted to be actuated by the drive element and to act as a restoring member as well for the drive element, a drive-transmission section actuated by the force storage member and a display section having a display tube with a transparent bottom, a viscous fluid stored in the tube and a display element connected to the drive-transmission section for vertical motion through the fluid. The overcurrent condition is displayed when the display element is hoisted by the drive-transmission section. The display of the normal condition is established when the display element has descended slowly under the influence of its own gravity and the viscosity resistance of the fluid in a prolonged time interval.

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Ishigure, Masao. (1985). Overcurrent condition display (U.S. Patent No. 4559530). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4559530

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