Patent US3590387A successfully refreshed from Google Patents.
US3590387A
Expired / Lapsed
US
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Self-locking spade terminal
Assignee: ABB Installation Products Inc
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Filing: 1968-02-12
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Granted: 1971-06-29
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Expires: 1988-02-12
Abstract
Abstract The improved terminal has a wire barrel for mechanical deformation about a conductor placed therein and a locking spade blade at its opposite end. Locking is achieved about a terminal screw by inwardly extending nibs at the tine ends which restrict the blade slot and by the thickness of the tines which permits nesting within the thread of such screw. The resiliency of the terminal permits deflection of the tine nibs during installation.
Inventors
- 👤 Earle H Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
H; H01; H01R; H01R11/00; H01R11/11; H01R11/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
257 words
A self-locking spade terminal fabricated from a resilient, highly conductive alloy comprising: a tubular portion adapted to receive a portion of an electrical conductor from which the insulation has been removed; a planar portion; a solid, continuous, planar transition portion extending in the same plane as said planar portion connected at a first end to said tubular portion and at a second end, opposite said first end, to said planar portion; said planar portion comprising two tines separated by a terminal screw-receiving slot; two nibs, one for each of said tines, each coupled to its associated tine adjacent the free ends thereof and partially blocking said terminal screwreceiving slot each of said nibs having a chamfered edge adjacent the coupling between said nib and its associated tine and the free end of said tine; said tines being proportioned to flex outwardly with respect to one another when the chamfered edges of said nibs are brought into contact with a terminal screw normal to the plane of said terminal and to return inwardly to their initial position when said terminal is removed from contact with said terminal screw whereby the engagement of the chamfered edges of said nibs with a terminal screw causes the outward deflection of said tines only until the terminal is advanced to place the terminal screw within the terminal screw-receiving slot permitting the tines only to return to their initial position and barring removal of the terminal from the terminal screw by the position of the nibs in the path of the terminal screw.
Claim 2
Dependent Claim
257 words
A self-locking spade terminal fabricated from a resilient, highly conductive alloy comprising: a tubular portion adapted to receive a portion of an electrical conductor from which the insulation has been removed; a planar portion; a solid, continuous, planar transition portion extending in the same plane as said planar portion connected at a first end to said tubular portion and at a second end, opposite said first end, to said planar portion; said planar portion comprising two tines separated by a terminal screw-receiving slot; two nibs, one for each of said tines, each coupled to its associated tine adjacent the free ends thereof and partially blocking said terminal screwreceiving slot each of said nibs having a chamfered edge adjacent the coupling between said nib and its associated tine and the free end of said tine; said tines being proportioned to flex outwardly with respect to one another when the chamfered edges of said nibs are brought into contact with a terminal screw normal to the plane of said terminal and to return inwardly to their initial position when said terminal is removed from contact with said terminal screw whereby the engagement of the chamfered edges of said nibs with a terminal screw causes the outward deflection of said tines only until the terminal is advanced to place the terminal screw within the terminal screw-receiving slot permitting the tines only to return to their initial position and barring removal of the terminal from the terminal screw by the position of the nibs in the path of the terminal screw.
Claim 3
Dependent Claim
16 words
A terminal as defined in claim 1 having an insulation jacket placed about said tubular portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |