Timed switch
US6670727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2001 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H43/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A timed switch has a housing member, an output connecting leg connected to an appliance, and a circuit board including both a timing device and an electromagnet. The output connecting leg is electrically connected to the circuit board, and has a front end movable member disposed behind the front wall of the housing member. A control button is pivoted to the outer side of the front wall from a middle with an upper and a lower pushing protrusions passing through the front wall to abut an upper part and a lower part of the movable member respectively. A first, and a second input connecting legs are provided, which are connected to the power, and the second further to the circuit board. A power-on end of the button is pushed to make the upper part, and the lower part of the movable member to contact the first leg and the electromagnet respectively; thus, the appliance and the circuit board are energized, and the electromagnet attracts the lower part of the movable member thereto so as to make the upper part continue to contact the first leg to complete the circuit. At the same time, the timing device is actuated such that the appliance can be automatically turned off at a preselected t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.