H01H 71/24
Electromagnetic mechanisms
H01H71/24 (Electromagnetic mechanisms) appears on 667 US grants and 482 published applications in this corpus.
Search patents in H01H- Granted patents
- 667
- Published applications
- 482
- Assignees
- 209
- Inventors
- 1,207
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 9 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 10 | 0 |
| 1987 | 16 | 0 |
| 1988 | 9 | 0 |
| 1989 | 8 | 0 |
| 1990 | 13 | 0 |
| 1991 | 5 | 0 |
| 1992 | 15 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 9 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 8 | 0 |
| 2001 | 12 | 1 |
| 2002 | 15 | 9 |
| 2003 | 11 | 12 |
| 2004 | 14 | 7 |
| 2005 | 12 | 8 |
| 2006 | 4 | 5 |
| 2007 | 1 | 5 |
| 2008 | 5 | 12 |
| 2009 | 12 | 25 |
| 2010 | 8 | 14 |
| 2011 | 12 | 14 |
| 2012 | 19 | 16 |
| 2013 | 23 | 20 |
| 2014 | 13 | 22 |
| 2015 | 17 | 26 |
| 2016 | 24 | 24 |
| 2017 | 29 | 29 |
| 2018 | 24 | 30 |
| 2019 | 31 | 26 |
| 2020 | 27 | 51 |
| 2021 | 35 | 26 |
| 2022 | 27 | 23 |
| 2023 | 30 | 24 |
| 2024 | 16 | 16 |
| 2025 | 16 | 21 |
| 2026 | 13 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 71/2463With plunger type armatures154
- H01H 71/32Having permanently magnetised part151
- H01H 71/2472With rotatable armatures109
- H01H 71/2454Characterised by the magnetic circuit or active magnetic elements88
- H01H 71/2409Combined with an electromagnetic current limiting mechanism56
- H01H 71/2418Combined with an electrodynamic current limiting mechanism51
- H01H 71/34Having two or more armatures controlled by a common winding40
- H01H 71/2481Characterised by the coil design29
All 16 subgroupsShow fewer
- H01H 71/2445Using a reed switch25
- H01H 71/28With windings acting in conjunction19
- H01H 2071/249With part of the magnetic circuit being in the normal current pathIndexing code15
- H01H 71/26With windings acting in opposition15
- H01H 71/2436With a holding and a releasing magnet, the holding force being limited14
- H01H 71/38Wherein the magnet coil also acts as arc blow-out device4
- H01H 71/30Having additional short-circuited winding2
- H01H 71/36Frequency selective2
Recent patents
- Ground fault circuit interrupter device and related electrical connection devices and electrical appliances15 Sep 2026US 12,738,438 B2
- Solid-state circuit breaker28 Jul 2026US 12,695,043 B2Schneider Electric (China) Co., Ltd.
- Rapid safety switch and rapid safety switch system14 Jul 2026US 12,683,103 B2Siemens Aktiengesellschaft
- Circuit breaker and quick tripping device thereof30 Jun 2026US 12,671,049 B2Chint Low Voltage Electrical Technology Co., Ltd.
- Apparatus and method for fast vacuum switch link26 May 2026US 12,640,323 B1Smart Wires Inc.
- Circuit breaker and manufacturing method therefor8 Oct 2026US 2026/0311947 A1Delta Electronics (Jiangsu) Ltd.
- Leakage protection device and electrical device27 Aug 2026US 2026/0253828 A1Sensata Technologies Changzhou Co., Ltd.
- Selectable shunt voltage for circuit breaker6 Aug 2026US 2026/0229872 A1Vertiv Corporation
- Switching device30 Jul 2026US 2026/0221752 A1Ellenberger & Poensgen GmbH
- Circuit breaker trip device and molded case circuit breaker including the same9 Jul 2026US 2026/0196425 A1Hd Hyundai Electric Co., Ltd.
Most cited
By later US patents
- Electronic circuit breaker with protection against sputtering arc faults and ground faults252US 5,224,006 AWestinghouse Electric Corp. · 1993
- Instantaneous trip device of a circuit breaker119US 5,103,198 AMerlin Gerin · 1992
- Current limiting circuit breaker100US 4,255,732 AWestinghouse Electric Corp. · 1981
- Circuit breaker contact arm latch mechanism for eliminating contact bounce100US 4,611,187 AGeneral Electric Company · 1986
- Circuit breaker99US 5,581,219 AFuji Electric Co., Ltd. · 1996