G04C 3/027
Using electromagnetic coupling between electric power source and pendulum
Official title: using electromagnetic coupling between electric power source and pendulum (G04C3/033 takes precedence)
G04C3/027 (Using electromagnetic coupling between electric power source and pendulum) appears on 10 US grants and 1 published applications in this corpus.
Search patents in G04C- Granted patents
- 10
- Published applications
- 1
- Assignees
- 5
- Inventors
- 12
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- G04C 3/0276The pendulum controlling indirectly, i.e. without mechanical connection, contacts4
- G04C 3/0278The pendulum controlling the gear-train by means of static switches2
- G04C 3/0271The pendulum controlling contacts and mechanically driving the gear-train0
- G04C 3/0273The pendulum controlling contacts, thereby electromagnetically driving the gear-train or several gear-trains0
- G04C 3/0275The pendulum controlling contacts, the pendulum driving electro-magnet simultaneously driving the gear-train0
Recent patents
- Pendulum, particularly for use in a clock16 Dec 2025US 12,498,670 B2
- Structure of a ultrathin clock15 Aug 1995US 5,442,601 A
- Electromagnetic drive circuit12 Sep 1989US 4,866,564 ASeikosha Co., Ltd.
- Electromagnetic driving circuit25 Apr 1989US 4,825,332 A
- Whole body swingable clock28 Aug 1984US 4,468,132 ARhythm Watch Co., Ltd.
Most cited
By later US patents
- Mechanically operating pendulum clock with an electronic correcting device8US 4,196,579 AUrgos Uhrenfabrik Schwenningen a.N. Haller, Jauch und Pabst · 1980
- Pendulum arrangement of pendulum clock8US 4,378,166 ARhythm Watch Co., Ltd. · 1983
- Pendulum arrangement for clock movement4US 4,449,831 ARhythm Watch Co., Ltd. · 1984
- Electromagnetic driving circuit4US 4,825,332 A1989
- Electromechanical clock3US 3,990,226 AKieninger & Obergfell Fabrik fur Technische Laufwerke und Apparate · 1976