US3836819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current limiting circuit interrupter device
Assignee: ABB Inc USA
•
Filing: 1973-08-20
•
Granted: 1974-09-17
•
Expires: 1993-08-20
Abstract
Abstract A helically wound coil is connected in series with a circuit interrupter and electrical contacts on diametrically opposite sides of each turn of the coil form direct current paths in parallel for each coil so that substantially no inductance is in the power circuit when the contacts are closed. The contacts are opened sequentially in response to a fault current to gradually introduce one or more turns of the coil in the series circuit in order to limit the rise of fault current before the series interrupter device is operated.
Inventors
- 👤 C Clausing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:23
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/42; H01H77/00; H01H77/02; H01H77/10; H02; H02H; H02H3/00; H02H3/02; H02H3/025; H01H71/00; H01H71/08; H01H2071/088
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
130 words
A current limiting device comprising a helically wound winding having first and second terminals at its opposite ends for connecting said winding in series with a circuit to be protected, first and second contact means disposed on opposite sides of said winding and movable into and out of engagement with respective opposite surfaces of at least one turn of said winding, means connecting said first and second contact means to said first and second terminals respectively, and operating means disposed relative to each of said first and second contact means to move said contact means to their said out of engagement positions in response to a given electrical condition, thereby to introduce the inductance of at least said one turn into a circuit connected to said first and second terminals.
Claim 2
Dependent Claim
130 words
A current limiting device comprising a helically wound winding having first and second terminals at its opposite ends for connecting said winding in series with a circuit to be protected, first and second contact means disposed on opposite sides of said winding and movable into and out of engagement with respective opposite surfaces of at least one turn of said winding, means connecting said first and second contact means to said first and second terminals respectively, and operating means disposed relative to each of said first and second contact means to move said contact means to their said out of engagement positions in response to a given electrical condition, thereby to introduce the inductance of at least said one turn into a circuit connected to said first and second terminals.
Claim 3
Dependent Claim
45 words
The device of claim 1 wherein said operating means includes circuit connection means defining a blow-off path for magnetically moving each of said first and second contact means to their said out of engagement positions with said lateral surfaces of said at least one turn.
Claim 4
Dependent Claim
34 words
The device of claim 1 which further includes biasing means for normally biasing said first and second contact means to their said engagement positions with said lateral surfaces of said at least one turn.
Claim 5
Dependent Claim
20 words
The device of claim 1 which further includes circuit interrupter means connected in series with said first and second terminals.
Claim 6
Dependent Claim
41 words
The device of claim 1 which further includes latch means for latching each of said first and second contact means in their said out of engagement positions after they are moved to said out of engagement positions by said operating means.
Claim 7
Dependent Claim
41 words
The device of claim 3 which further includes latch means for latching each of said first and second contact means in their said out of engagement positions after they are moved to said out of engagement positions by said operating means.
Claim 8
Dependent Claim
45 words
The device of claim 3 wherein said operating means includes circuit connection means defining a blow-off path for magnetically moving each of said first and second contact means to their said out of engagement positions with said lateral surfaces of said at least one turn.
Claim 9
Dependent Claim
45 words
The device of claim 6 wherein said operating means includes circuit connection means defining a blow-off path for magnetically moving each of said first and second contact means to their said out of engagement positions with said lateral surfaces of said at least one turn.
Claim 10
Dependent Claim
20 words
The device of claim 8 which further includes circuit interrupter means connected in series with said first and second terminals.
Claim 11
Dependent Claim
133 words
A current limiting device comprising a helically wound winding having first and second terminals at its opposite ends for connecting said winding in series with a circuit to be protected, first and second pluralities of contact means disposed on laterally opposite sides of said winding and movable into and out of engagement with respective lateral surfaces of respective turns of said winding, means connecting said first and second pluralities of contact means to said first and second terminals respectively, and operating means disposed relative to each of said first and second pluralities of contact means to move said contact means to their said out of engagement positions in response to a given electrical condition, thereby to introduce the inductance of said respective turns into a circuit connected to said first and second terminals.
Claim 12
Dependent Claim
133 words
A current limiting device comprising a helically wound winding having first and second terminals at its opposite ends for connecting said winding in series with a circuit to be protected, first and second pluralities of contact means disposed on laterally opposite sides of said winding and movable into and out of engagement with respective lateral surfaces of respective turns of said winding, means connecting said first and second pluralities of contact means to said first and second terminals respectively, and operating means disposed relative to each of said first and second pluralities of contact means to move said contact means to their said out of engagement positions in response to a given electrical condition, thereby to introduce the inductance of said respective turns into a circuit connected to said first and second terminals.
Claim 13
Dependent Claim
28 words
The device of claim 10 which further includes biasing means for normally biasinG each of said first and second pluralities of contact means to their said engagement positions.
Claim 14
Dependent Claim
20 words
The device of claim 11 which further includes circuit interrupter means connected in series with said first and second terminals.
Claim 15
Dependent Claim
41 words
The device of claim 12 which further includes latch means for latching each of said first and second contact means in their said out of engagement positions after they are moved to said out of engagement positions by said operating means.
Claim 16
Dependent Claim
45 words
The device of claim 13 wherein said operating means includes circuit connection means defining a blow-off path for magnetically moving each of said first and second contact means to their said out of engagement positions with said lateral surfaces of said at least one turn.
Claim 17
Dependent Claim
21 words
The device of claim 10 wherein said first and second pluralities of contact means are sequentially operated by said operating means.
Claim 18
Dependent Claim
36 words
The device of claim 1 wherein said winding is helically wound and wherein said contact means are disposed adjacent lateral surfaces of said winding and move in a direction perpendicular to the axis of said winding.
Claim 19
Dependent Claim
36 words
The device of claim 1 wherein said winding is spirally wound and wherein said contact means are disposed adjacent end surfaces of said winding and move in a direction parallel to the axis of said winding.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |