US3864649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical safety device with improved trip mechanism
Assignee: Rucker Co
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Filing: 1974-03-20
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Granted: 1975-02-04
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Expires: 1994-03-20
Abstract
Abstract Electrical safety device for controlling the flow of current in a conductor and interrupting the flow in the event of a predetermined current such as an excessive current or ground fault current.
Inventors
- 👤 Richard C Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:24
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/70; H01R13/713; H01R13/7135; H01H; H01H71/00; H01H71/10; H01H71/50; H01H71/505; H01H83/00; H01H83/02; H01H83/04; H02; H02H; H02H3/00; H02H3/26; H02H3/32; H02H3/33; H01H2071/506; H01H2083/045; H01H71/501; Y; Y10; Y10S; Y10S200/00; Y10S200/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
In an electrical safety device for controlling the flow of current in a conductor and interrupting the flow in the event of a predetermined current: first and second contacts for making and breaking a circuit with the conductor, a floating contact arm having the first contact mounted thereon and movable relative to the second contact, a latch member releasably engaging the contact arm at a point spaced from the first contact, resilient means engaging the contact arm between the first contact and the latch member for urging contacts together when the latch member is engaging the contact arm, said resilient means serving to pivot the arm about the contacts to provide rocking movement between the contacts when the latch member is disengaged from the arm, means for disengaging the latch member from the contact arm in response to the predetermined current, and a fulcrum member positioned for engaging the contact arm between the first contact and the resilient means when the arm has pivoted a predetermined distance about the contacts and thereafter cooperating with the resilient means to separate the contacts.
Claim 2
Dependent Claim
181 words
In an electrical safety device for controlling the flow of current in a conductor and interrupting the flow in the event of a predetermined current: first and second contacts for making and breaking a circuit with the conductor, a floating contact arm having the first contact mounted thereon and movable relative to the second contact, a latch member releasably engaging the contact arm at a point spaced from the first contact, resilient means engaging the contact arm between the first contact and the latch member for urging contacts together when the latch member is engaging the contact arm, said resilient means serving to pivot the arm about the contacts to provide rocking movement between the contacts when the latch member is disengaged from the arm, means for disengaging the latch member from the contact arm in response to the predetermined current, and a fulcrum member positioned for engaging the contact arm between the first contact and the resilient means when the arm has pivoted a predetermined distance about the contacts and thereafter cooperating with the resilient means to separate the contacts.
Claim 3
Dependent Claim
19 words
The electrical safety device of claim 1 wherein the means for disengaging the latch member includes an operating coil.
Claim 4
Dependent Claim
52 words
The electrical safety device of claim 1 further including a manually operable reset member engaging the contact arm for exerting a force on said arm generally opposite to the force of the resilient means to return the arm to a position in which said arm can be engaged by the latch member.
Claim 5
Dependent Claim
23 words
The electrical safety device of claim 3 further including a resilient member urging the latch member into position for engaging the contact arm.
Claim 6
Dependent Claim
40 words
The electrical safety device of claim 3 wherein the means for disengaging the latch member is adapted for holding the latch member out of engagement with the contact arm as long as the condition producing the predetermined current is present.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |