US4521654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage disconnect switch employing pre-contact pieces
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1983-09-26
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Granted: 1985-06-04
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Expires: 2003-09-26
Abstract
Abstract A high voltage disconnect switch, including a countercontact piece having switch countercontacts and being arranged for connection to a source of high voltage. Resilient pre-contact pieces are insulatingly connected to the countercontact piece and include switch contacts disposed for contacting the switch countercontacts. Movable primary contact pieces are arranged to be movable from a first position of separation from the pre-contact pieces and the countercontact piece to a second position in which the primary contact pieces are in contact with the pre-contact pieces but not with the countercontact piece and to a third position in which the primary contact pieces are in contact with both the pre-contact pieces and the countercontact piece. The pieces are configured and arranged relative to one another so that during the closing of the switch the countercontacts contact the contacts after the primary contact pieces are moved to the second position and before they are moved to the third position, and during the opening of the switch the countercontacts separate from the contacts after the primary contact pieces are moved to the second position and before they are moved to the first position.
Inventors
- 👤 Wolfgang Eberhardt
- 👤 Dietrich Hoffmann
- 👤 Karl Kriechbaum
- 👤 Erwin Rohde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
H; H01; H01H; H01H31/00; H01H31/34; H01H31/36; H01H33/00; H01H33/02; H01H33/04; H01H33/12; H01H33/121
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
194 words
A high voltage disconnect switch, comprising: a countercontact piece having switch countercontacts and being arranged for connection to a source of high voltage; resilient pre-contact pieces insulatingly connected to said countercontact piece and including switch contacts disposed for contacting said switch countercontacts; and movable primary contact pieces arranged to be movable from a first position of separation from said pre-contact pieces and said countercontact piece to a second position in which said primary contact pieces are in contact with said pre-contact pieces but not with said countercontact piece and to a third position in which said primary contact pieces are in contact with both said pre-contact pieces and said countercontact piece; wherein said pieces are configured and arranged relative to one another so that during the closing of said switch said countercontacts contact said contacts after said primary contact pieces are moved to the second position and before said primary contact pieces are moved to the third position, and during the opening of said switch said countercontacts separate from said contacts after said primary contact pieces are moved to the second position and before said primary contact pieces are moved to the first position.
Claim 2
Dependent Claim
194 words
A high voltage disconnect switch, comprising: a countercontact piece having switch countercontacts and being arranged for connection to a source of high voltage; resilient pre-contact pieces insulatingly connected to said countercontact piece and including switch contacts disposed for contacting said switch countercontacts; and movable primary contact pieces arranged to be movable from a first position of separation from said pre-contact pieces and said countercontact piece to a second position in which said primary contact pieces are in contact with said pre-contact pieces but not with said countercontact piece and to a third position in which said primary contact pieces are in contact with both said pre-contact pieces and said countercontact piece; wherein said pieces are configured and arranged relative to one another so that during the closing of said switch said countercontacts contact said contacts after said primary contact pieces are moved to the second position and before said primary contact pieces are moved to the third position, and during the opening of said switch said countercontacts separate from said contacts after said primary contact pieces are moved to the second position and before said primary contact pieces are moved to the first position.
Claim 3
Dependent Claim
18 words
A switch as defined in claim 1, wherein said contacts and countercontacts are composed of a burn-resistant material.
Claim 4
Dependent Claim
19 words
A switch as defined in claim 2, wherein said burn-resistant material is one of tungsten and a tungsten alloy.
Claim 5
Dependent Claim
28 words
A switch as defined in claim 1, and further comprising a material surrounding said contacts and countercontacts for emitting a quenching gas upon the occurrence of an arc.
Claim 6
Dependent Claim
24 words
A switch as defined in claim 4, wherein said material has the shape of sleeve which accommodates said contacts and countercontacts in its interior.
Claim 7
Dependent Claim
14 words
A switch as defined in claim 5, wherein at least said countercontact is resilient.
Claim 8
Dependent Claim
44 words
A switch as defined in claim 1, wherein said pre-contact pieces each have a C-shape construction presenting a one-arm lever system having a fulcrum insulatingly connected with said countercontact piece for moving each said contact into contact with a respective one of said countercontacts.
Claim 9
Dependent Claim
41 words
A switch as defined in claim 1, wherein said pre-contact pieces are configured as a dual-arm lever system having a fulcrum insulatingly connected to said countercontact piece for moving each said contact into contact with a respective one of said countercontacts.
Claim 10
Dependent Claim
19 words
A switch as defined in claim 1, and further including a spring positioned for spreading apart said pre-contact pieces.
Claim 11
Dependent Claim
21 words
A switch as defined in claim 1, and further including an abutment disposed for limiting the stroke of said pre-contact pieces.
Claim 12
Dependent Claim
23 words
A switch as defined in claim 1, and further including a hood disposed for covering, at least in part, said contacts and countercontacts.
Claim 13
Dependent Claim
15 words
A switch as defined in claim 11, wherein said hood is made of weather-resistant material.
Claim 14
Dependent Claim
16 words
A switch as defined in claim 1, wherein said switch is a single pole disconnect switch.
References Cited (Backward Citations)
US1815637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |