Patent US3566056A successfully refreshed from Google Patents.
US3566056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air disconnect switch
Assignee: Cooper Industries LLC
•
Filing: 1968-12-12
•
Granted: 1971-02-23
•
Expires: 1988-12-12
Abstract
Abstract A disconnect switch having stationary contact means and movable contact means comprising a tubular switch blade having a contact structure formed therein for contacting the stationary contact means when the movable and stationary contact means are in an engaged position. The contact structure comprises a continuous portion of the wall of the tubular switch blade and is formed by radially displacing a softened portion of the wall. A silver layer is formed on the raised contact structure which engages the stationary contact means to provide low contact resistance.
Inventors
- 👤 Howard E Joseph
- 👤 Calvin C Patterson
- 👤 Marcel N Rieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:12
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/42; H01H31/00; H01H31/02; H01H31/026; H01H31/26; H01H31/28; H01H2031/286
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
In an electrical disconnect switch having a stationary contact and a switch blade movable into and out of an engaged position with the stationary contact, said switch blade being a tube of conductive material having a longitudinal axis and a wall providing an electrically conductive path, a hollow contact structure for said switch blade comprising a contact pad spaced outwardly of said tube wall in a direction perpendicular to said longitudinal axis, said contact pad being said tube wall and engaging said stationary contact when the switch blade is in its engaged position and a contact wall projecting radially of said tube wall, said contact wall being the tube wall and being connected to and supporting said contact pad.
Claim 2
Dependent Claim
119 words
In an electrical disconnect switch having a stationary contact and a switch blade movable into and out of an engaged position with the stationary contact, said switch blade being a tube of conductive material having a longitudinal axis and a wall providing an electrically conductive path, a hollow contact structure for said switch blade comprising a contact pad spaced outwardly of said tube wall in a direction perpendicular to said longitudinal axis, said contact pad being said tube wall and engaging said stationary contact when the switch blade is in its engaged position and a contact wall projecting radially of said tube wall, said contact wall being the tube wall and being connected to and supporting said contact pad.
Claim 3
Dependent Claim
27 words
The contact structure according to claim 1 wherein said contact wall comprises a plurality of wall sides each connected between said contact pad and the tube wall.
Claim 4
Dependent Claim
25 words
The contact structure according to claim 2 wherein said plurality of wall sides, the contact pad and the tube wall together form a continuous structure.
Claim 5
Dependent Claim
22 words
The contact structure according to claim 3 wherein said contact pad is positioned substantially parallel to the longitudinal axis of said tube.
Claim 6
Dependent Claim
67 words
A switch blade for an electrical disconnect switch comprising, in combination, an electrically conductive tube having a longitudinal axis, a tubular wall and a first continuous hollow contact structure in said tubular wall, said contact structure having a contact engaging wall raised exteriorly from said tubular wall in a direction perpendicular to said longitudinal axis and a support wall connecting said contact making wall and tubular wall.
Claim 7
Dependent Claim
67 words
A switch blade for an electrical disconnect switch comprising, in combination, an electrically conductive tube having a longitudinal axis, a tubular wall and a first continuous hollow contact structure in said tubular wall, said contact structure having a contact engaging wall raised exteriorly from said tubular wall in a direction perpendicular to said longitudinal axis and a support wall connecting said contact making wall and tubular wall.
Claim 8
Dependent Claim
21 words
The combination according to claim 5 wherein said tube has opposed ends and said contact structure is positioned intermediate said ends.
Claim 9
Dependent Claim
59 words
The combination according to claim 6 further comprising a second continuous contact structure formed in the wall of said tube substantially opposite said first contact structure, said second contact structure having a contact engaging wall raised exteriorly from said tube wall and a support wall connecting said tube wall and the contact making wall of the second contact structure.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |