Patent JPS6367187A successfully refreshed from Google Patents.
US3605052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Avoidance of switching device false off handle indication
Assignee: General Electric Co
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Filing: 1970-01-22
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Granted: 1971-09-14
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Expires: 1990-01-22
Abstract
Abstract Switching apparatus having an operating mechanism including a releasable trip member or cradle for automatically opening relatively movable contact means, a manually actuatable handle movable between ON, OFF, and RESET positions for manually closing and opening the contact means and for resetting the cradle in a latched position and means-preventing movement of the handle to the OFF or RESET positions when the contact means is in closed circuit position, to preclude a false OFF handle indication.
Inventors
- 👤 Herbert M Dimond
- 👤 Keith W Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:57
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/50; H01H71/501; H01H71/52; H01H71/522; H01H71/525
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
184 words
Electrical switching apparatus comprising an enclosing casing, a. a stationary contact supported in said casing, b. a movable contact supported in said casing, c. an operating mechanism in said casing for moving said movable contact and including a releasable cradle movable between a latched position and a released position, d. said operating mechanism also including a handle movable between OFF and ON positions for manually operating said movable contact between open and closed circuit positions respectively while said cradle is in said latched position, e. connecting means between said handle and said cradle providing for movement of said cradle from said released to said latched position by movement of said handle in a direction from said ON toward said OFF position, and f. blocking means positively preventing movement of said handle to move said cradle to said latched position while said movable contact is in said closed circuit position, and g. means operated in response to movement of said movable contact from said closed to said open circuit position to defeat said blocking means to permit movement of said cradle to said latched position.
Claim 2
Dependent Claim
184 words
Electrical switching apparatus comprising an enclosing casing, a. a stationary contact supported in said casing, b. a movable contact supported in said casing, c. an operating mechanism in said casing for moving said movable contact and including a releasable cradle movable between a latched position and a released position, d. said operating mechanism also including a handle movable between OFF and ON positions for manually operating said movable contact between open and closed circuit positions respectively while said cradle is in said latched position, e. connecting means between said handle and said cradle providing for movement of said cradle from said released to said latched position by movement of said handle in a direction from said ON toward said OFF position, and f. blocking means positively preventing movement of said handle to move said cradle to said latched position while said movable contact is in said closed circuit position, and g. means operated in response to movement of said movable contact from said closed to said open circuit position to defeat said blocking means to permit movement of said cradle to said latched position.
Claim 3
Dependent Claim
78 words
Electric switching apparatus as set forth in claim 1 wherein said blocking means comprises a blocking interlock member movable between a blocking and a nonblocking position, biasing means biasing said blocking means to said blocking position while said movable contact is in said closed circuit position, said operating mechanism including means operated in response to movement of said movable contact to said open circuit position for moving said blocking means to said nonblocking position despite said biasing means.
Claim 4
Dependent Claim
38 words
Electrical switching apparatus as set forth in claim 2 wherein said blocking member when in said blocking position is in the path of movement of said releasable cradle and prevents movement of said cradle to said relatched position.
Claim 5
Dependent Claim
38 words
Electrical switching apparatus as set forth in claim 2 wherein said blocking member when in said blocking position is in the path of movement of said handle member and prevents movement of said handle to said OFF position.
Claim 6
Dependent Claim
177 words
Electrical switching apparatus as set forth in claim 1 wherein said blocking member comprises a lever pivotally supported in said casing, said lever having an abutment portion for engaging and blocking a portion of said operating mechanism for preventing movement of said cradle to said relatched position, means biasing said lever to blocking position, and said lever having a second portion engageable by said movable contact means for moving said lever out of said blocking position against the bias of said biasing means. 6. Electrical switching apparatus as set forth in claim 1 wherein said blocking member comprises a lever pivotally supported in said casing, said lever having an abutment portion for engaging and blocking one of said cradle and handle members for preventing movement of said cradle and handle members for preventing movement of said cradle to said relatched position, means biasing said lever to blocking position, and said lever having a second portion engageable by said movable contact means for moving said lever out of said blocking position against the bias of said biasing means
Claim 7
Dependent Claim
98 words
Electrical switching apparatus as set forth in claim 1 wherein said operating mechanism includes an overcenter spring biasing said handle to said ON position when said handle is in said ON position and biasing said handle to said OFF position when said handle is in said OFF position, said blocking means, when operative preventing movement of said handle from said ON to said OFF position far enough to prevent said overcenter spring means from crossing the handle pivot point for insuring that said handle when released will be moved away from said OFF position by said overcenter spring.
References Cited (Backward Citations)
US2158387A
Cited
US3525959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |