US4878038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit protection device
Assignee: Individual
•
Filing: 1987-12-07
•
Granted: 1989-10-31
•
Expires: 2007-12-07
Abstract
Abstract Multiple embodiments of a device suitable for arrangement in a circuit for protection of components in the circuit are disclosed, the device of each embodiment including a temperature responsive electrical regulating component including a conductive polymer or ceramic material having an electrical regulating capability dependent on temperature and at least one series connected switch including trip means also responsive to temperature for opening and closing the circuit in a reliable manner, the device being adapted for connection in the circuit to be protected. The various embodiments include different arrangements of the temperature responsive electrical regulating component and the switch. Certain of the embodiments include a second series connected switch of similar construction. The conductive polymer or ceramic material can be of a variety of types for performing different electrical regulating functions within the circuit.
Inventors
- 👤 James T. Tsai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:30
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/02; H02; H02H; H02H9/00; H02H9/02; H02H9/026; H01H9/00; H01H2009/0083; H01H37/00; H01H37/02; H01H37/32; H01H37/58; H01H37/585; H01H61/01; H01H61/013; H01H71/00; H01H71/10; H01H71/12; H01H71/14
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
144 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising and elongated member responsive to temperature for opening the circuit, the conductive polymer or ceramic means of the temperature responsive electrical regulating means being of cylindrical configuration and surrounding the elongated member in spaced apart relation therefrom in order to assure rapid response of the circuit protection device.
Claim 2
Independent Claim
144 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising and elongated member responsive to temperature for opening the circuit, the conductive polymer or ceramic means of the temperature responsive electrical regulating means being of cylindrical configuration and surrounding the elongated member in spaced apart relation therefrom in order to assure rapid response of the circuit protection device.
Claim 3
Independent Claim
140 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising an elongated member arranged in a conductive housing and responsive to temperature for opening the circuit, the conductive polymer or ceramic means being arranged adjacent to and in conductive relation with the housing in order to assure rapid response of the circuit protection device.
Claim 4
Independent Claim
140 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising an elongated member arranged in a conductive housing and responsive to temperature for opening the circuit, the conductive polymer or ceramic means being arranged adjacent to and in conductive relation with the housing in order to assure rapid response of the circuit protection device.
Claim 5
Dependent Claim
62 words
The circuit protection device of claim 2 further comprising a second switch means of similar construction as the first switch means and arranged in series with the temperature responsive electrical regulating means and with the first switch means, the conductive polymer or ceramic means being arranged between and in conductive relation with the respective housings for the first and second switch means.
Claim 6
Independent Claim
111 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising a ferrite magnetic switch in order to assure rapid response of the circuit protection device.
Claim 7
Independent Claim
111 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising a ferrite magnetic switch in order to assure rapid response of the circuit protection device.
Claim 8
Dependent Claim
62 words
The circuit protection device of claim 4 further comprising a second switch means of similar construction as the first switch means and arranged in series with the temperature responsive electrical regulating means and with the first switch means, the conductive polymer or ceramic means being arranged between and in conductive relation with the respective housings for the first and second switch means.
Claim 9
Independent Claim
115 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, a second switch means of similar construction as the first switch means and arranged in series with the temperature responsive electrical regulating means and with the first switch means.
Claim 10
Independent Claim
115 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, a second switch means of similar construction as the first switch means and arranged in series with the temperature responsive electrical regulating means and with the first switch means.
Claim 11
Independent Claim
125 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising an elongated member arranged generally coaxially in a cylindrical housing, the temperature responsive electrical regulating means also being arranged within the housing adjacent one end of the elongated member.
Claim 12
Independent Claim
125 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising a temperature responsive electrical regulating means including a conductive polymer means or ceramic means having an electrical regulating capability dependent on temperature, first switch means arranged in series with the temperature responsive electrical regulating means, the switch means including trip means for opening the circuit and positively terminating current flow in a reliable manner, and means for connecting the temperature responsive electrical regulating means and first switch means in the circuit, the trip means of the first switch means comprising an elongated member arranged generally coaxially in a cylindrical housing, the temperature responsive electrical regulating means also being arranged within the housing adjacent one end of the elongated member.
Claim 13
Dependent Claim
30 words
The circuit protection device of claim 7 wherein the conductive polymer or ceramic means comprises a conductive material suitable for regulating current flow in the circuit in response to temperature.
Claim 14
Dependent Claim
31 words
The circuit protection device of claim 7 wherein the conductive polymer or ceramic means comprises a conductive material suitable for regulating electrical power in the primary circuit in response to temperature.
Claim 15
Dependent Claim
17 words
The circuit protection device of claim 7 wherein the first switch means also includes automatic reset means.
Claim 16
Dependent Claim
28 words
The circuit protection device of claim 7 wherein the housing is formed from insulation material and the temperature responsive electrical regulating means is in contact with the electrodes.
Claim 17
Dependent Claim
27 words
The circuit protection device of claim 11 wherein the housing is conductive and further comprising insulating means mounting the temperature responsive electrical regulating means in the housing.
Claim 18
Dependent Claim
46 words
The circuit protection device of claim 12 wherein the conductive polymer or ceramic means is formed with opposite conductive surfaces arranged generally perpendicularly to the axis of the housing, one end of the elongated member being fixed in conductive relation with one of the conductive surfaces.
Claim 19
Independent Claim
131 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising first switch means including an elongated member fixed at one end and arranged generally along the axis of a conductive housing, the housing including a contact point, the elongated member being temperature responsive for moving into and out of engagement with the contact point, a temperature responsive electrical regulating means arranged in series with the first switch means and including a conductive polymer or ceramic means having an electrical regulating capability dependent on temperature, and means for connecting the temperature responsive electrical regulating means and the first switch means with the circuit whereby the temperature responsive electrical regulating means provides electrical regulation for the circuit and the switch means positively opens and closes the circuit.
Claim 20
Independent Claim
131 words
A device suitable for arrangement in a circuit for protection of components in the circuit, comprising first switch means including an elongated member fixed at one end and arranged generally along the axis of a conductive housing, the housing including a contact point, the elongated member being temperature responsive for moving into and out of engagement with the contact point, a temperature responsive electrical regulating means arranged in series with the first switch means and including a conductive polymer or ceramic means having an electrical regulating capability dependent on temperature, and means for connecting the temperature responsive electrical regulating means and the first switch means with the circuit whereby the temperature responsive electrical regulating means provides electrical regulation for the circuit and the switch means positively opens and closes the circuit.
Claim 21
Dependent Claim
27 words
The circuit protection device of claim 14 wherein the housing is cylindrical and the elongated member is coaxially arranged in spaced apart relation relative to the housing.
Claim 22
Dependent Claim
25 words
The circuit protection device of claim 14 wherein the conductive polymer or ceramic means is arranged in abutting and conductive relation with the conductive housing.
Claim 23
Dependent Claim
67 words
The circuit protection device of claim 16 further comprising another switch means of similar construction as the one switch means, the second switch means being arranged in series with the temperature responsive electrical regulating means and with the one switch means, the conductive polymer or ceramic means arranged in abutting and conductive relation with the respective housings for the one switch means and the other switch means.
Claim 24
Dependent Claim
41 words
The circuit protection device of claim 14 further comprising another switch means of similar construction as the one switch means, the other switch means being arranged in series with the temperature responsive electrical regulating means and with the one switch means.
Claim 25
Dependent Claim
43 words
The circuit protection device of claim 14 wherein the temperature responsive electrical regulating means is arranged within the housing adjacent one end of the elongated member and further comprising insulating means for mounting the temperature responsive electrical regulating means within the conductive housing.
Claim 26
Dependent Claim
51 words
The circuit protection device of claim 19 wherein the housing is cylindrical and the conductive polymer or ceramic means is formed with opposite conductive surfaces arranged generally perpendicular to the axis of the housing, one end of the elongated member being fixed in conductive relation with one of the conductive surfaces.
Claim 27
Dependent Claim
46 words
The circuit protection device of claim 1 wherein the housing is disc shaped and formed from insulation material, the temperature responsive electrical regulating means being in sheet form arranged within the housing adjacent one end of the electrode and in contact with the elongated switch means.
References Cited (Backward Citations)
US4329726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |