US4733028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch
Assignee: JAHM Inc
•
Filing: 1987-01-27
•
Granted: 1988-03-22
•
Expires: 2007-01-27
Abstract
Abstract A low voltage switch having relatively long plunger travel that maximizes internal self-wiping of the contacts thereby to prolong switch life. The support for the internal contacts functions as a guide for the plunger as well as providing the necessary electrical spacing.
Inventors
- 👤 Dennis P. Flumignan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:46
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/14; H01H13/16; H01H1/00; H01H1/12; H01H1/36; H01H1/365; H01H3/00; H01H3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
An electrical switch comprising: an insulating housing defining a chamber having an opening therein, a pair of electrically conductive terminals extending into said chamber, an insulating member extending into said chamber between and beyond said terminals in juxtaposed supporting relation thereto, a plunger, extending outwardly of said chamber through the opening therein and movable relative thereto and to said terminals, spring means normally biasing said plunger outwardly of said housing, a U-shaped conductive contact member supported by said plunger for movement therewith, said contact member having spaced leg portions engageable with said terminals, respectively, to complete an electrical circuit therebetween, engagement of said contact member with said terminals moving the leg portions of said contact member away from one another thereby to develop inherent resilient contact pressure on said terminals, respectively, the insulating member on said housing extending between the legs of said contact member at all positions of said plunger and supporting said terminals in compression against contact pressure exerted by the leg portions of said contact member.
Claim 2
Dependent Claim
169 words
An electrical switch comprising: an insulating housing defining a chamber having an opening therein, a pair of electrically conductive terminals extending into said chamber, an insulating member extending into said chamber between and beyond said terminals in juxtaposed supporting relation thereto, a plunger, extending outwardly of said chamber through the opening therein and movable relative thereto and to said terminals, spring means normally biasing said plunger outwardly of said housing, a U-shaped conductive contact member supported by said plunger for movement therewith, said contact member having spaced leg portions engageable with said terminals, respectively, to complete an electrical circuit therebetween, engagement of said contact member with said terminals moving the leg portions of said contact member away from one another thereby to develop inherent resilient contact pressure on said terminals, respectively, the insulating member on said housing extending between the legs of said contact member at all positions of said plunger and supporting said terminals in compression against contact pressure exerted by the leg portions of said contact member.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |