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:
May. 17, 2011
Filed:
Apr. 06, 2010
Song-lin Tong, Shenzhen, CN;
Lan-yi Feng, Shenzhen, CN;
Song-Lin Tong, Shenzhen, CN;
Lan-Yi Feng, Shenzhen, CN;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A multimeter includes a switching circuit. The switching circuit includes a micro control unit (MCU), a first normally-open switch, a second normally-open switch, and an electronic switch. The first and second normally-open switches connect to the MCU. The MCU connects to the electronic switch. The electronic switch connects to a power control terminal of the multimeter. The MCU are operable to detect whether the first and second normally-open switches are both closed and accordingly control the electronic switch to turn on or off. The electronic switch outputs a control signal to the power control terminal of the multimeter to control the multimeter to power on or off.