US4618748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device for electrical switching apparatus
Assignee: Siemens AG
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Filing: 1984-10-15
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Granted: 1986-10-21
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Expires: 2004-10-15
Abstract
Abstract A switching device is provided for electrical switchgear, particularly contactors. The switching device includes a step-shaped, bowed current lead with a contact portion cooperating with a contact portion of a switch bridge. The switching device also includes a U-shaped arc chute and a fastening bolt. The arc chute surrounds the contact portion with an air gap so that the electrical connection is made solely via the fastening bolt. The edge portions of the arc chute are set back in the area of the contact portion so that the contact portion of the contact bridge cannot come in contact with the arc chute even though the contact bridge may be obliquely positioned.
Inventors
- 👤 Manfred Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:28
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44; H01H9/446; H01H9/46
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
In a switching means for electrical switchgear having a pair of contacts, particularly a contactor, with a substantially linear current lead and an arc deflector arranged adjacent the contact portion, said arc deflector forming a U the free end of which accepts an arc drawn between said contacts, said U being aligned approximately at the level of one of the contacts, the improvement comprising a step-shaped current lead bearing a contact and an arc deflector having a U-shape, one leg portion of the U lying in the area of the stationary contact being offset parallel to the contact, while the other leg portion of the U is penetrated by a fastening bolt and rests against the contact-bearing side of the free end of the step-shaped offset current lead.
Claim 2
Dependent Claim
128 words
In a switching means for electrical switchgear having a pair of contacts, particularly a contactor, with a substantially linear current lead and an arc deflector arranged adjacent the contact portion, said arc deflector forming a U the free end of which accepts an arc drawn between said contacts, said U being aligned approximately at the level of one of the contacts, the improvement comprising a step-shaped current lead bearing a contact and an arc deflector having a U-shape, one leg portion of the U lying in the area of the stationary contact being offset parallel to the contact, while the other leg portion of the U is penetrated by a fastening bolt and rests against the contact-bearing side of the free end of the step-shaped offset current lead.
Claim 3
Dependent Claim
20 words
A switching device in accordance with claim 1, further including slugs extending from the arc deflector toward the current lead.
Claim 4
Dependent Claim
24 words
A switching device in accordance with claim 1, further including an open slot in said other leg portion and registering with said fastening bolt.
Claim 5
Dependent Claim
17 words
A switching device in accordance with claim 1, wherein said arc deflector is made of ferromagnetic material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |