US4659913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elongate electrical assemblies
Assignee: Tyco International Ltd
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Filing: 1985-06-14
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Granted: 1987-04-21
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Expires: 2005-06-14
Abstract
Abstract Elongate electrical devices, comprising two conductors with electrical elements connected in parallel between them, have improved performance if the power supply is connected to one conductor at the near end and to the other conductor at the far end. Particularly useful devices are heaters, e.g. PTC conductive polymer heaters. The power supply is connected to the far end of the device through a connection means whose electrical properties can be correlated with those of the device in order to obtain a wide range of useful results. For example the connection means can have PTC, NTC or ZTC character and can be a simple conductor or another elongate device. The power supply can be DC or single-phase, two-phase or three-phase AC.
Inventors
- 👤 John A. Midgley
- 👤 Richard H. Hulett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:37
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/108; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/146; H05B3/40; H05B3/54; H05B3/56
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
121 words
An elongate composite heating device which comprises (1) an elongate electrical self-regulating heater comprising (a) a first elongate electrical connection means; (b) a second elongate electrical connection means; and (c) a plurality of electrical heating elements which are connected in parallel between the first and second connection means; (2) a third elongate electrical connection means; (3) a fourth elongate electrical connection means; (4) a fifth elongate electrical connection means; and (5) a connecting body of insulating material which physically secures the heater (1) and the third, fourth and fifth elongate electrical connection means to each other; the heater (1) and the third, fourth and fifth elongate electrical connection means being electrically insulated from each other throughout the length of the device.
Claim 2
Dependent Claim
121 words
An elongate composite heating device which comprises (1) an elongate electrical self-regulating heater comprising (a) a first elongate electrical connection means; (b) a second elongate electrical connection means; and (c) a plurality of electrical heating elements which are connected in parallel between the first and second connection means; (2) a third elongate electrical connection means; (3) a fourth elongate electrical connection means; (4) a fifth elongate electrical connection means; and (5) a connecting body of insulating material which physically secures the heater (1) and the third, fourth and fifth elongate electrical connection means to each other; the heater (1) and the third, fourth and fifth elongate electrical connection means being electrically insulated from each other throughout the length of the device.
Claim 3
Dependent Claim
22 words
A device according to claim 1 wherein each of the first, second, third and fourth connection means is a stranded metal wire.
Claim 4
Dependent Claim
24 words
A device according to claim 1 wherein the electrical elements(c) comprise an elongate element composed of a melt-extruded conductive polymer which exhibits PTC behavior.
Claim 5
Dependent Claim
14 words
A device according to claim 1 wherein the self-regulating heater is a zone heater.
Claim 6
Dependent Claim
15 words
A device according to claim 1 wherein the heater is at least 330 feet long.
Claim 7
Dependent Claim
23 words
A device according to claim 3 wherein the first and second connection means are metallic wires which are embedded in said elongate element.
Claim 8
Dependent Claim
113 words
An elongate composite heating device which comprises (1) an elongate electrical self-regulating heater comprising (a) a first elongate electrical connection means; (b) a second elongate electrical connection means; and (c) a plurality of electrical heating elements which are connected in parallel between the first and second connection means; (2) a third elongate electrical connection means which is a round metal wire or a flat metal strip: and (3) a fourth elongate electrical connection means which is a round metal wire or a flat metal strip; the elongate heater and the third and fourth elongate electrical connection means being physically secured to, but electrically insulated from, each other throughout the length of the device.
Claim 9
Dependent Claim
113 words
An elongate composite heating device which comprises (1) an elongate electrical self-regulating heater comprising (a) a first elongate electrical connection means; (b) a second elongate electrical connection means; and (c) a plurality of electrical heating elements which are connected in parallel between the first and second connection means; (2) a third elongate electrical connection means which is a round metal wire or a flat metal strip: and (3) a fourth elongate electrical connection means which is a round metal wire or a flat metal strip; the elongate heater and the third and fourth elongate electrical connection means being physically secured to, but electrically insulated from, each other throughout the length of the device.
Claim 10
Dependent Claim
24 words
A device according to claim 7 wherein the electrical elements(c) comprise an elongate element composed of a melt-extruded conductive polymer which exhibits PTC behavior.
Claim 11
Dependent Claim
15 words
A device according to claim 7 wherein the heater is at least 330 feet long.
Claim 12
Dependent Claim
23 words
A device according to claim 8 wherein the first and second connection means are metallic wires which are embedded in said elongate element.
Claim 13
Dependent Claim
45 words
A device according to claim 10 which comprises a fifth elongate electrical connection means which is a metal conductor and which is physically secured to, but electrically insulated from the heater and the third and fourth electrical connection means throughout the length of the device.
Claim 14
Dependent Claim
22 words
A device according to claim 11 wherein the fifth connection means is smaller than each of the third and fourth connection means.
Claim 15
Dependent Claim
150 words
An elongate composite heating device which comprises (1) an elongate electrical self-regulating heater which comprises (a) a first elongate electrical connection means which is an elongate metallic electrode; (b) a second elongate electrical connection means which is an elongate metallic electrode; and (c) an elongate strip of a melt-extruded conductive polymer exhibiting PTC behavior; the first and second connection means being parallel to each other and being embedded in the elongate strip; (2) a third elongate electrical connection means which is an elongate metal conductor; (3) a fourth elongate electrical connection means which is an elongate metal conductor; and (4) a fifth elongate electrical connection means which is an elongate metal conductor; the heater and the third, fourth and fifth elongate electrical connection means being separated from each other by electrical insulation and being physically secured together by a connecting body of insulating material throughout the length of the device.
Claim 16
Dependent Claim
150 words
An elongate composite heating device which comprises (1) an elongate electrical self-regulating heater which comprises (a) a first elongate electrical connection means which is an elongate metallic electrode; (b) a second elongate electrical connection means which is an elongate metallic electrode; and (c) an elongate strip of a melt-extruded conductive polymer exhibiting PTC behavior; the first and second connection means being parallel to each other and being embedded in the elongate strip; (2) a third elongate electrical connection means which is an elongate metal conductor; (3) a fourth elongate electrical connection means which is an elongate metal conductor; and (4) a fifth elongate electrical connection means which is an elongate metal conductor; the heater and the third, fourth and fifth elongate electrical connection means being separated from each other by electrical insulation and being physically secured together by a connecting body of insulating material throughout the length of the device.
Claim 17
Dependent Claim
13 words
A device according to claim 13 which is at least 330 feet long.
Claim 18
Dependent Claim
22 words
A device according to claim 13 wherein the fifth connection means is smaller than each of the third and fourth connection means.
Claim 19
Dependent Claim
19 words
A device according to claim 13 wherein each of the first and second connection means is a stranded wire.
Claim 20
Dependent Claim
22 words
A device according to claim 13 wherein each of the first, second, third, fourth and fifth connection means is a stranded wire.
Claim 21
Dependent Claim
34 words
A device according to claim 13 wherein each of the third, fourth and fifth connection means is a stranded wire which is surrounded by an insulating polymeric jacket throughout the length of the device.
References Cited (Backward Citations)
US2782290A
Cited
US3061501A
Cited
US3221145A
Cited
US3214719A
Cited
US3501619A
Cited
US3397302A
Cited
US3535494A
Cited
US3792232A
Cited
US3861029A
Cited
US3757086A
Cited
US3959622A
Cited
GB1529354A
Cited
US4177376A
Cited
US4045763A
Cited
US3947799A
Cited
US4421582A
Cited
GB1562086A
Cited
US4017715A
Cited
US4104509A
Cited
DE2641894A1
Cited
US4107640A
Cited
DE2715878A1
Cited
US4151401A
Cited
US4117312A
Cited
US4072848A
Cited
US4246468A
Cited
GB1566151A
Cited
US4324974A
Cited
US4242573A
Cited
US4228418A
Cited
US4272471A
Cited
US4341949A
Cited
US4425497A
Cited
US4298789A
Cited
US4334351A
Cited
US4314230A
Cited
US4345368A
Cited
US4436986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |