Electromagnetic relay
First Claim
Patent Images
1. An electromagnetic relay, comprising:
- a coil;
a normally closed contact;
a plurality of independent movable contacts including a movable contact which is connected to said normally closed contact when said coil is not energized;
a plurality of independent normally open contacts disposed in correspondence with said plurality of movable contacts; and
an armature operated under control of an electromagnet created when said coil is energized, to thereby simultaneously displace said plurality of independent movable contacts so that said plurality of movable contacts are connected to said plurality of independent normally open contacts;
wherein said plurality of normally open contacts are electrically connected in common within a housing, said plurality of movable contacts respectively come in contact with said plurality of normally open contacts to permit said plurality of independent movable contacts to be electrically connected in series.
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Abstract
An electromagnetic relay comprises a coil and a contact group containing a plurality of normally open contacts which are connected in series under control of an electromagnet created when this coil is energized. This electromagnetic relay can prevent a short-circuit from occurring between the normally closed contact and the normally open contact due to an arc even though the contact gap length is reduced.
27 Citations
12 Claims
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1. An electromagnetic relay, comprising:
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a coil;
a normally closed contact;
a plurality of independent movable contacts including a movable contact which is connected to said normally closed contact when said coil is not energized;
a plurality of independent normally open contacts disposed in correspondence with said plurality of movable contacts; and
an armature operated under control of an electromagnet created when said coil is energized, to thereby simultaneously displace said plurality of independent movable contacts so that said plurality of movable contacts are connected to said plurality of independent normally open contacts;
wherein said plurality of normally open contacts are electrically connected in common within a housing, said plurality of movable contacts respectively come in contact with said plurality of normally open contacts to permit said plurality of independent movable contacts to be electrically connected in series. - View Dependent Claims (2, 3, 4, 5)
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6. An electromagnetic relay in which first and second relay sections are provided within a housing, each of said first and second relay sections comprising:
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a coil;
a normally closed contact;
a plurality of independent movable contacts including a movable contact which is connected to said normally closed contact when said coil is not energized;
a plurality of independent normally open contacts disposed in correspondence with said plurality of movable contacts; and
an armature operated under control of an electromagnet created when said coil is energized, to thereby simultaneously displace said plurality of independent movable contacts so that said plurality of movable contacts are connected to said plurality of independent normally open contacts;
wherein said plurality of normally open contacts of said first and second relay sections are electrically connected in common within a housing, said plurality of independent movable contacts of said first and second relay sections respectively come in contact with said plurality of normally open contacts of said first and second relay sections to permit said plurality of independent movable contacts of said first and second relay sections to be electrically connected in series. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification