Power switch module
US4291238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1980 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Feb 4, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/054
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power switch module for use in controlled-sequence devices such as a domestic laundry appliance has switches arranged in a pattern about a central portion of the module selectively closeable to connect circuitry associated with each switch to a source of electric potential. Each switch has an associated actuator movable to open and close the switch, and each actuator is operated by a hammer having a striking surface for depressing an actuator to open a switch and a camming surface for raising an actuator to close a switch. The hammer is mounted for rotation on a shaft and is axially movable by a solenoid. A disc encoder on the shaft derives hammer-position information which is transmitted to a microprocessor which controls sequential operation of the device and energizes the solenoid to open or close a switch at appropriate times during operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.