US3732390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyswitch
Assignee: Unisys Corp
•
Filing: 1971-12-27
•
Granted: 1973-05-08
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Expires: 1991-12-27
Abstract
Abstract An electromechanical switch that includes a floating contact suspended in an elastic material above a fixed contact is disclosed. Finger pressure compresses the elastic material forcing the floating contact to make electrical contact with the fixed contact completing the switch circuit.
Inventors
- 👤 P Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:53
CPC Classifications
H; H01; H01H; H01H35/00; H01H13/00; H01H13/02; H01H13/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
An airtight keyswitch, comprising: a rigid insulative base member; electrically conductive first and second fixed leads rigidly supported by said base member; an electrically conductive fixed contact rigidly supported by said base member and electrically coupled to said first fixed lead; an electrically conductive floating contact; an electrically conductive flexible lead electrically coupling said floating contact to said second fixed lead; a key member spaced apart from said base member and sandwiching said floating contact therebetween; an elastic potting material substantially completely filling the space between said key member and said base member for forming an airtight elastic body for said keyswitch and supporting said floating contact out of electrical contact with said fixed contact and restrainingly permitting said floating contact to make electrical contact with said fixed contact when compressed by said key member.
Claim 2
Dependent Claim
135 words
An airtight keyswitch, comprising: a rigid insulative base member; electrically conductive first and second fixed leads rigidly supported by said base member; an electrically conductive fixed contact rigidly supported by said base member and electrically coupled to said first fixed lead; an electrically conductive floating contact; an electrically conductive flexible lead electrically coupling said floating contact to said second fixed lead; a key member spaced apart from said base member and sandwiching said floating contact therebetween; an elastic potting material substantially completely filling the space between said key member and said base member for forming an airtight elastic body for said keyswitch and supporting said floating contact out of electrical contact with said fixed contact and restrainingly permitting said floating contact to make electrical contact with said fixed contact when compressed by said key member.
Claim 3
Dependent Claim
114 words
An airtight keyswitch, comprising: a rigid insulative base member; electrically conductive first and second fixed contacts rigidly supported by said base member; an electrically conductive floating contact; a key member spaced apart from said base member and sandwiching said floating contact and said first and second fixed contacts therebetween; an elastic potting material substantially completely filling the space between said key member and said base member for forming an airtight elastic body for said keyswitch and supportIng said floating contact out of electrical contact with said first and second fixed contacts and restrainingly permitting said floating contact to make electrical contact with said first and second fixed contacts when compressed by said key member.
Claim 4
Dependent Claim
114 words
An airtight keyswitch, comprising: a rigid insulative base member; electrically conductive first and second fixed contacts rigidly supported by said base member; an electrically conductive floating contact; a key member spaced apart from said base member and sandwiching said floating contact and said first and second fixed contacts therebetween; an elastic potting material substantially completely filling the space between said key member and said base member for forming an airtight elastic body for said keyswitch and supportIng said floating contact out of electrical contact with said first and second fixed contacts and restrainingly permitting said floating contact to make electrical contact with said first and second fixed contacts when compressed by said key member.
References Cited (Backward Citations)
US2877324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |