Patent US3649946A successfully refreshed from Google Patents.
US3649946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric contact devices
Assignee: COQ NV
•
Filing: 1971-01-25
•
Granted: 1972-03-14
•
Expires: 1991-01-25
Abstract
Abstract Electric contact device for the permanent connection between relatively movable conducting members, said device consisting of a rod-shaped conductor, a contact holder surrounding said conductor with ample clearance and a zigzag folded metal contact strip bent in the shape of a ring and provided in the annular gap between said conductor and said holder, the parts of said strip extending between the folds thereof being all bent in the same direction.
Inventors
- 👤 Egbertus Adrianus Frowein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:51
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
An electric contact device for the permanent electrically conductive connection between two relatively movable conductors, said device comprising a metal contact holder having a round opening, a metal rod having a round cross-sectional area and extending centrally with ample clearance through the opening of said holder and a zigzag folded metal contact strip bent in the shape of a closed ring, said contact strip being clamped in the annular space left between said holder and said rod, all parts of the zigzag folded strip being bent in the same direction in places between the folds of said strip and consisting each of a shorter and a longer portion extending from the bend and strip parts, of which the shorter portions extend between the bends of said parts and the contact holder and the longer portions extend between said bends and the rod, alternating in said strip with strip parts, of which the longer portions extend between the bends of said parts and the contact holder and the shorter portions extend between said bends and the rod.
Claim 2
Dependent Claim
176 words
An electric contact device for the permanent electrically conductive connection between two relatively movable conductors, said device comprising a metal contact holder having a round opening, a metal rod having a round cross-sectional area and extending centrally with ample clearance through the opening of said holder and a zigzag folded metal contact strip bent in the shape of a closed ring, said contact strip being clamped in the annular space left between said holder and said rod, all parts of the zigzag folded strip being bent in the same direction in places between the folds of said strip and consisting each of a shorter and a longer portion extending from the bend and strip parts, of which the shorter portions extend between the bends of said parts and the contact holder and the longer portions extend between said bends and the rod, alternating in said strip with strip parts, of which the longer portions extend between the bends of said parts and the contact holder and the shorter portions extend between said bends and the rod.
Claim 3
Dependent Claim
41 words
An electric contact device as claimed in claim 1, in which the shorter portion extending from the bend of each part of the contact strip lies against the longer portion extending from the bend of the following part of said strip.
Claim 4
Dependent Claim
32 words
An electric contact device as claimed in claim 1, in which the two portions extending from the bend of each part of the contact strip enclose an angle of about 90* .
Claim 5
Dependent Claim
31 words
An electric contact device as claimed in claim 1, in which tubularly bent portions connect the parts of the strip in pairs at least at the one ends of said parts.
Claim 6
Dependent Claim
48 words
An electric contact device as claimed in claim 1, in which the parts of the zigzag folded strip join each other in pairs at least at their one ends in sharp folds and the end portions of said folds are bent out of the plane of the strip.
Claim 7
Dependent Claim
46 words
An electric contact device as claimed in claim 1, in which the parts of the zigzag folded strip join each other in pairs at least at their one ends in sharp folds and said folds have each a convex shape in the plane of the strip.
Claim 8
Dependent Claim
19 words
An electric contact device as claimed in claim 1, in which the contact strip has a dumbbell-shaped cross-sectional profile.
Claim 9
Dependent Claim
19 words
An electric contact device as claimed in claim 1, in which the contact strip has a bulging cross-sectional profile.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |