Electrical control unit
US4679728A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1983 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Aug 24, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24D19/1009
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrical control unit has specific application to central heating systems in which a plurality of electrical connections are to be made to the unit. The unit includes a backplate to which electrical connections may be made at a plurality of positions. A housing, containing control circuits and contacts for making connection between the circuit and the backplate connections, is removably attached to the backplate. Access to the electrical connections on the backplate for testing purposes may be achieved with the housing attached and electrically connected to the backplate, but a cover on the backplate may be positioned to prevent such access during normal operation of the unit. The unit also includes two control switches of which one is operable independently of the other or of which both are independently operable upon release of an interlock. The control circuits include a printed circuit board on which one side is printed. An L-shaped conductor effects electrical connection between the printed side of the circuit board and a display located at the unprinted side of the circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.