Telephone hook switch with elastomeric contact member
US4709389A · kind A · utility
5Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone hook switch uses an elastomeric member as the contact making member. A hook switch has a pivotally mounted actuating member having two levers extending in opposite directions, one on each side of the pivot axis. One lever is moved by the positioning, and removal, of a handset, the actuating member being biased to a particular pivotal direction. The other lever presses on a deformable projection in the elastomeric member. Depression of the projection causes an electrically conducting layer to move into contact with contact areas of a switch position on a printed circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.