Patent US3567892A successfully refreshed from Google Patents.
US3567892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switches of large power comprising axially movable switching rods and resilient annular fixed contacts which are in permanent contact with said switching rods and contact strips for such fixed contacts
Assignee: COQ NV
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Filing: 1969-10-20
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Granted: 1971-03-02
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Expires: 1989-10-20
Abstract
Abstract An electric switch having an axially movable switching rod and a fixed contact which is in permanent contact with said switching contact. The fixed contact comprising a zigzag folded metal contact strip which is bent in the shape of an uninterrupted ring. The inner circumference of said ring is bent in the shape of longitudinally split tubes extending in the direction of the width of said strip and interconnecting the parts of the folded strip that adjoin each other at said inner circumference.
Inventors
- 👤 Rintje Boersma
- 👤 Gijsbert W Irik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:07
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
An electric switch of large power comprising an axially movable switching rod, a resilient annular fixed contact which is in permanent contact with said switching rod to connect same with the circuit to be closed and opened by the switch, an annular holder and a zigzag folded metal contact strip which is surrounded and supported by said holder and bent in the shape of an uninterrupted ring that snugly encloses said switching rod, said holder and said contact strip constituting together said fixed contact, the parts of each individual pair of adjacent parts of sad contact strip interconnected at the inner circumference of said ring by a portion of said contact strip which is bent in the shape of a longitudinally split tube extending in the direction of the width of said contact strip.
Claim 2
Dependent Claim
134 words
An electric switch of large power comprising an axially movable switching rod, a resilient annular fixed contact which is in permanent contact with said switching rod to connect same with the circuit to be closed and opened by the switch, an annular holder and a zigzag folded metal contact strip which is surrounded and supported by said holder and bent in the shape of an uninterrupted ring that snugly encloses said switching rod, said holder and said contact strip constituting together said fixed contact, the parts of each individual pair of adjacent parts of sad contact strip interconnected at the inner circumference of said ring by a portion of said contact strip which is bent in the shape of a longitudinally split tube extending in the direction of the width of said contact strip.
Claim 3
Dependent Claim
53 words
An electric switch as claimed in claim 1, in which one part of each pair of adjacent parts interconnected by a tubular portion of said contact strip merges smoothly and the other part thereof merges through a fold extending in the direction of the width of said contact strip into said tubular portion.
Claim 4
Dependent Claim
32 words
An electric switch as claimed in claim 1, in which the parts of each pair of adjacent parts interconnected by a tubular portion of the contact strip lie practically against each other.
Claim 5
Dependent Claim
51 words
An electric switch as claimed in claim 1, in which each tubular portion interconnecting two adjacent parts of said contact strip and at least the end portions of said parts adjoining said tubular portion are curved both in the direction of the width of and at right angles with said parts.
Claim 6
Dependent Claim
63 words
A zigzag folded metal contact strip for a fixed contact of the electric switch claimed in claim 1, in which the parts of each individual pair of adjacent parts of said contact strip are interconnected by a portion of said strip which is bent in the shape of a longitudinally split tube extending in the direction of the width of the contact strip.
Claim 7
Dependent Claim
40 words
A zigzag folded metal contact strip as claimed in claim 5, in which each tubular portion interconnecting two adjacent parts adjoining said tubular portion are curved both in the direction of the width and at right angles with said parts.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |