US3872273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switchgear operating mechanism overcenter spring toggle with latched restraint
Assignee: ABB Inc USA
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Filing: 1973-10-15
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Granted: 1975-03-18
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Expires: 1993-10-15
Abstract
Abstract A load break high voltage disconnect switch and operating mechanism therefor comprising an over center toggle and spring effecting a snap action toward the open or closed position of the switch. The over center toggle is latched in either direction by a separate toggle for each direction. The separate toggle is extended and blocks movement of the over center toggle in a breaking direction until the spring operating handle has moved the spring over center and extended the spring fully; the spring operating handle at that point operates the latching toggle to release the over center toggle and permit a rapid snap action to occur.
Inventors
- 👤 Philip C Netzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:45
CPC Classifications
H; H01; H01H; H01H31/00; H01H31/14; H01H31/16; H01H31/22; H01H33/00; H01H33/02; H01H33/04; H01H33/06; H01H5/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
352 words
In switchgear having at least one movable contact and a complementary contact; operating mechanism for moving the movable contact into engagement with the complementary contact and out of engagement therewith; said operating mechanism comprising: an operating link connected to said movable contact and movable in one direction to cause said movable contact to engage said complementary contact and in the opposite direction to disengage the same; a rotatable lever; a pivot for said lever; a first end of said lever being connected to said operating link; a first toggle comprising a first toggle link connected at one end to the other end of said lever, a toggle pin for said toggle; said first toggle link being connected at its other end to said toggle pin; said first toggle having a second toggle link connected at one end to said toggle pin and pivoting stationarily at its other end; an operating handle; said operating handle being connected at its inner end to and rotatable about the pivot of said rotatable lever; a tension spring between the outer end of said operating handle and said toggle pin; rotation of said operating handle to a position wherein the said spring extends between the outer end of said operating handle and the lever point on a line on one side of the toggle pin causing said first toggle to collapse in that direction and correspondingly rotate said rotable lever thereby moving the operating link to operate the movable contact in one direction; rotation of said operating handle to a position wherein said spring extends on the opposite side of said toggle pin thereafter causing collapse of said first toggle in the opposite direction to operate the movable contact in an opposite direction; and means for latching the said first toggle after it has moved in one direction to maintain the said toggle in that position; and additional means operable by said handle when it has completed its movement in a direction to cause collapse of the toggle in an opposite direction, to release said latching means and permit collapse of said toggle in said opposite direction.
Claim 2
Dependent Claim
352 words
In switchgear having at least one movable contact and a complementary contact; operating mechanism for moving the movable contact into engagement with the complementary contact and out of engagement therewith; said operating mechanism comprising: an operating link connected to said movable contact and movable in one direction to cause said movable contact to engage said complementary contact and in the opposite direction to disengage the same; a rotatable lever; a pivot for said lever; a first end of said lever being connected to said operating link; a first toggle comprising a first toggle link connected at one end to the other end of said lever, a toggle pin for said toggle; said first toggle link being connected at its other end to said toggle pin; said first toggle having a second toggle link connected at one end to said toggle pin and pivoting stationarily at its other end; an operating handle; said operating handle being connected at its inner end to and rotatable about the pivot of said rotatable lever; a tension spring between the outer end of said operating handle and said toggle pin; rotation of said operating handle to a position wherein the said spring extends between the outer end of said operating handle and the lever point on a line on one side of the toggle pin causing said first toggle to collapse in that direction and correspondingly rotate said rotable lever thereby moving the operating link to operate the movable contact in one direction; rotation of said operating handle to a position wherein said spring extends on the opposite side of said toggle pin thereafter causing collapse of said first toggle in the opposite direction to operate the movable contact in an opposite direction; and means for latching the said first toggle after it has moved in one direction to maintain the said toggle in that position; and additional means operable by said handle when it has completed its movement in a direction to cause collapse of the toggle in an opposite direction, to release said latching means and permit collapse of said toggle in said opposite direction.
Claim 3
Dependent Claim
98 words
The switchgear operating mechanism of claim 1 wherein said latching means comprises a second toggle stationarily pivotally connected at one end and connected at the other end to said second link of said first toggle; said second toggle being extended on movement of the first toggle in one direction and blocking return movement of said first toggle; an extension from said second toggle adjacent its stationarily pivotal connection; said operating handle engaging said extension on completion of movement of said operating handle in an opposite direction and collapsing said second toggle to permit said first toggle to collapse.
Claim 4
Dependent Claim
71 words
The switchgear operating mechanism of claim 2 wherein said latching means comprises a third toggle similar to the second toggle and extended on movement of said first toggle in an opposite direction and blocking return movement of said first toggle, an extension from said third toggle adjacent its pivotal connection engageable by said operating handle to collapse said third toggle to remove the said blocking of movement of said first toggle.
Claim 5
Dependent Claim
26 words
The switchgear operating mechanism of claim 3 in which each of said second and third toggles is provided with spring means for extending said first toggle.
Claim 6
Dependent Claim
29 words
The switchgear operating mechanism of claim 3 in which, at all times, one of said second and third toggles is in blocking position with respect to said first toggle.
References Cited (Backward Citations)
US2862075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |