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:
Feb. 03, 1998
Filed:
Mar. 18, 1996
Shinichi Sasagawa, Miyagi-ken, JP;
Seishi Namioka, Miyagi-ken, JP;
Nobuyuki Ichimiya, Miyagi-ken, JP;
Shin Kinouchi, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An E.A.S. system capable of immediately making a decision on a broken condition of a tag 2 itself or its connection cable 8 or a non-connected condition of the connection cable 8 to a repeating device 1 at start-up of the system. The system comprises the repeating device 1 and a tag 2 detachably coupled through the connection cable 8 to the repeating device 1. The repeating device 1 is equipped with a jack 3 having a plug receiver 3a, a fixed contact 3b and a movable contact 3c, a pull-up resistor 4 coupled between the movable contact 3c and a power supply 10, a connection section for connecting the fixed contact 3b and the plug receiver 3a with a ground point, and a tag condition detecting section (5 to 7) coupled to the movable contact 3c. The tag 2 incorporates an internal resistor 2a, and a double pole plug 9 is detachably connected through the connection cable 8 with the jack 3. When the double pole plug 9 is separated from the jack 3, the movable contact 3c comes into contact with the fixed contact 3b, and when it is inserted into the jack 3, the movable contact 3c is separated from the fixed contact 3b.