Block mounting of pressure switch cartridge
US5728986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/346
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cartridge type pressure switch is formed with a cup-shaped contact flanged outwardly at its rim and slidably nested in an annular spacer. A flexible diaphragm has an integrally formed annular bead ring which is stretched over the spacer to secure the diaphragm in place over the cup-shaped contact. A spring nested in the cup-shaped contact has the outer end registered against a deck or spring retainer. A pair of stationary contacts on opposite sides of the spacer have terminal portions extending outwardly through the deck. The spring biases the cup-shaped contact in a direction to seat the flange against the stationary contacts. When the cartridge is inserted in a bore, the bead ring is compressed to seal the cartridge in the bore. When a plurality of cartridges are received in bores in a block or manifold, a spacer and lead frame are commonly received over the terminal portions of the contacts on each cartridge for providing electrical connection; and, a cover is received over the lead frame and attached to the block. Alternatively a single cartridge is inserted in a bore and retained by a plate, with terminal pins connected to cut outs in the terminal portions of the contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.