Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Reexamination Certificate
2005-06-28
2005-06-28
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
C335S202000
Reexamination Certificate
active
06911884
ABSTRACT:
In an electromagnetic switching device including a cylindrical part made of a magnetic material with a closed bottom for housing a movable iron core having a movable contact and so constructed as to render the movable contact movable toward and away from a fixed contact, a joint member made of a metallic material with an insertion hole formed substantially in the center thereof for movably receiving a movable shaft fixedly attached to the movable iron core, and a metal plate made of a non-magnetic material with a hole formed substantially in the center thereof with the inner diameter substantially the same as the inner diameter of the cylindrical part, the cylindrical part and the joint member are air-tightly jointed to each other with the metal plate provided therebetween, and the movable iron core is housed in the cylindrical part with a clearance defined between the movable iron core and the joint member corresponding to a required stroke within which the movable contact contacts the fixed contact. This arrangement provides improvement in magnetic efficiency of electromagnet of the device. Accordingly, improved energy saving performance is accomplished as compared with a case of a conventional electromagnetic switching device.
REFERENCES:
patent: 4893102 (1990-01-01), Bauer
patent: 5394128 (1995-02-01), Perreira et al.
patent: 5631613 (1997-05-01), Niimi et al.
patent: 5892194 (1999-04-01), Uotome et al.
patent: 6064289 (2000-05-01), Wieloch et al.
patent: 2004/0080389 (2004-04-01), Nishida et al.
patent: 9-129107 (1997-05-01), None
patent: 9-259728 (1997-10-01), None
Enomoto Hideki
Kishi Hideki
Uotome Riichi
Yamamoto Ritsu
Donovan Lincoln
Matsushita Electric & Works Ltd.
LandOfFree
Electromagnetic switching apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic switching apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic switching apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470951