US3924914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical safety grounding device means
Assignee: Individual
•
Filing: 1973-12-28
•
Granted: 1975-12-09
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Expires: 1993-12-28
Abstract
Abstract Electrical safety grounding devices of the type for single phase two and three wire systems. It features improved electrical grounding capability for plugs, connectors, receptacles and adapters having improved fuse protection and signal response indicating means protecting life and equipment in the daily use of electricity.
Inventors
- 👤 Philip M Banner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:26
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/14; G01R27/00; G01R27/02; G01R27/20; G01R31/00; G01R31/50; G01R31/52; G01R31/54; G01R31/58; H; H01; H01R; H01R13/00; H01R13/648; H01R29/00; H01R31/00; H01R31/06; H01R31/065; H01R13/66; H01R13/717; Y; Y10; Y10S; Y10S439/00; Y10S439/912
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
An electrical safety grounding device means of the type for two and three wire electrical systems having a receptacle comprising a conductive cover plate for said receptacle, means to ground said plate, and a plug adapted to plug into said receptacle, a ground contact on said plug adapted to contact said grounded plate, and fuse protection in said plug connected to a current carrying wire, and ground indicating means connected to said wire and said ground on said plug, wherein the receptacle is an adapter having a receptacle on one end having a grounding contact and a connector body on the other end connected to wiring.
Claim 2
Dependent Claim
106 words
An electrical safety grounding device means of the type for two and three wire electrical systems having a receptacle comprising a conductive cover plate for said receptacle, means to ground said plate, and a plug adapted to plug into said receptacle, a ground contact on said plug adapted to contact said grounded plate, and fuse protection in said plug connected to a current carrying wire, and ground indicating means connected to said wire and said ground on said plug, wherein the receptacle is an adapter having a receptacle on one end having a grounding contact and a connector body on the other end connected to wiring.
Claim 3
Dependent Claim
39 words
Apparatus as in claim 1 wherein means to ground said plate comprises grounding the connection of said conductive plate to a grounded junction box connected to a grounding conductor providing grounding from said plate to a plug and receptacle.
Claim 4
Dependent Claim
31 words
Apparatus as in claim 1 wherein said fuse protection means comprises fuse protection in plugs, receptacles and adapters having replaceable and throwaway fuses that fit into said plugs receptacles and adapters.
Claim 5
Dependent Claim
32 words
Apparatus as in claim 1 wherein electrical safety grounding means comprises having ground and circuit indicating means with visual and audio advantages giving warning of broken grounding conductors and improper circuit wiring.
Claim 6
Dependent Claim
36 words
Apparatus as in claim 1 wherein said receptacle means comprises a rotatable pointer disc mounted over one end of said receptacle so that when rotated it opens at least one grounding conductor connection in said receptacle.
Claim 7
Dependent Claim
56 words
An electrical safety grounding device means of the type for two and three wire electrical systems having a receptacle comprising a conductive cover plate for said receptacle, means to ground said plate, and a plug adapted to plug into said receptacle, a ground contact on said Plug, plate and receptacle having magnetic contacts for grounding conductors
Claim 8
Dependent Claim
56 words
An electrical safety grounding device means of the type for two and three wire electrical systems having a receptacle comprising a conductive cover plate for said receptacle, means to ground said plate, and a plug adapted to plug into said receptacle, a ground contact on said Plug, plate and receptacle having magnetic contacts for grounding conductors
Claim 9
Dependent Claim
29 words
Apparatus as in claim 1 wherein said ground contact comprises a first and second grounding contact connected together so that first and second grounding contacts have a connected ground.
Claim 10
Dependent Claim
52 words
Apparatus as in claim 5 wherein said adapter has a rotatable disc and pointer on said two and three wire receptacle ends that have at least two grounding recesses so that said disc and pointer are selectively responsive to indicating at least one grounding conductor recess by connection to signal responsive means.
Claim 11
Dependent Claim
30 words
Apparatus as in claim 1 wherein said adapter comprises signal responsive audio alarm on said two and three wire electrical systems that indicate circuits and grounding conditions in said adapters.
Claim 12
Dependent Claim
26 words
Apparatus as in claim 1 wherein said adapters have an on-off switch turning said two and three wire electrical systems on and off on said adapters.
Claim 13
Dependent Claim
29 words
Apparatus as in claim 10 wherein said adapters have a test switch connected to said two and three wire electrical systems indicating the electrical safety conditions of said adapters.
Claim 14
Dependent Claim
92 words
An electrical safety grounding device means of the type for two and three wire electrical systems wherein adapters, receptacles, connectors, plugs and testers have a selective amperage fuse protection switch connected to at least one wire of said twO and three wire electrical systems responsive to disconnecting said wire when said fuse protection short circuits protecting current carrying line wiring by selective positioning of differently rated amperage fuse located within said electrical safety grounding means which is selected according to the specific amperage needs of the appliance or equipment to be used.
Claim 15
Dependent Claim
92 words
An electrical safety grounding device means of the type for two and three wire electrical systems wherein adapters, receptacles, connectors, plugs and testers have a selective amperage fuse protection switch connected to at least one wire of said twO and three wire electrical systems responsive to disconnecting said wire when said fuse protection short circuits protecting current carrying line wiring by selective positioning of differently rated amperage fuse located within said electrical safety grounding means which is selected according to the specific amperage needs of the appliance or equipment to be used.
Claim 16
Dependent Claim
35 words
Apparatus as in claim 1 wherein said electrical safety grounding device menas has an on-off switch turning said two and three wire electrical systems on and off on said adapters, receptacles, connectors plugs and testers.
Claim 17
Dependent Claim
38 words
Apparatus as in claim 13 wherein said electrical safety grounding device means has a test switch connected to said two and three wire electrical systems indicating the electrical safety condition of said adapters, receptacles, connectors, plugs and testers.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |