US4937544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
"Contact arrangement for a relay"
Assignee: Siemens AG
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Filing: 1988-12-12
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Granted: 1990-06-26
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Expires: 2008-12-12
Abstract
Abstract A contact arrangement has a contact spring which is prestressed against a seating edge of an actuation element by a prestress bend. The pre-stress bend lies at an angle of between 0 through 30 degrees relative to the seating edge so that roll-off is produced at the contact location. Such contact arrangement is especially advantageous for switching high-current loads since roll-off at the contact location reduces the welding tendency and makes an easier break-open of the contact when the contact is opening if there is a slight welding of the contacts.
Inventors
- 👤 Erwin Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:55
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/60; H01H1/00; H01H1/12; H01H1/14; H01H1/18; H01H1/20; H01H1/2083; H01H47/00; H01H47/002; H01H2047/003; H01H3/00; H01H3/001; H01H50/16; H01H50/18; H01H50/24; H01H50/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
134 words
A contact arrangement for a relay having an actuation winding, comprising: a contact spring having a spring leg with a secured portion and a free end; a first contact piece on said free end of said spring leg; an actuating element having a seating edge attacking said contact spring between said secured portion and said free end; a cooperating contact piece against which said first contact piece rests when in a closed position and from which said first contact piece is lifted when being moved to an open position; said first contact piece being moved between said closed position and said open position by actuation of said actuating element; and at least one angled pre-stress bend in said contact spring proceeding at an acute angle relative to said seating edge of said actuating element.
Claim 2
Dependent Claim
134 words
A contact arrangement for a relay having an actuation winding, comprising: a contact spring having a spring leg with a secured portion and a free end; a first contact piece on said free end of said spring leg; an actuating element having a seating edge attacking said contact spring between said secured portion and said free end; a cooperating contact piece against which said first contact piece rests when in a closed position and from which said first contact piece is lifted when being moved to an open position; said first contact piece being moved between said closed position and said open position by actuation of said actuating element; and at least one angled pre-stress bend in said contact spring proceeding at an acute angle relative to said seating edge of said actuating element.
Claim 3
Dependent Claim
29 words
A contact arrangement as claimed in claim 1, wherein said actuation element attacks said contact spring between said at least one angled pre-stress bend and said first contact piece.
Claim 4
Dependent Claim
42 words
A contact arrangement as claimed in claim 2, wherein said actuation element is an armature to which said contact spring is secured, said contact spring having a portion being supported on said seating edge of said armature when in said open condition.
Claim 5
Dependent Claim
31 words
A contact arrangement as claimed in claim 1, wherein said pre-stress bend lies at an angle of between 0 and 30 degrees relative to said seating edge of said actuation element.
Claim 6
Dependent Claim
29 words
A contact arrangement as claimed in claim 4, wherein said pre-stress bend proceeds at an angle of approximately 5 degrees relative to said seating edge of said actuating element.
Claim 7
Dependent Claim
22 words
A contact arrangement as claimed in claim 1, wherein said at least one angled pre-stress bend is a plurality of pre-stress bends.
Claim 8
Dependent Claim
25 words
A contact arrangement as claimed in claim 6, wherein said plurality of pre-stress bends all proceed in the same direction relative to said seating edge.
Claim 9
Dependent Claim
23 words
A contact arrangement as claimed in claim 6, wherein said plurality of pre-stress bends proceed in opposite directions relative to said seating edge.
Claim 10
Dependent Claim
95 words
A contact arrangement, comprising: a first contact spring; a first contact piece at a free end of said first contact spring; a second contact; a second contact piece resting against said first contact piece when in a closed condition and from which said first contact piece is lifted when being moved to an open position; means for moving said first and second contact pieces relative to one another between said closed position and said open position; and a pre-stress bend in said first contact spring at an oblique angle relative to a longitudinal direction thereof.
Claim 11
Dependent Claim
95 words
A contact arrangement, comprising: a first contact spring; a first contact piece at a free end of said first contact spring; a second contact; a second contact piece resting against said first contact piece when in a closed condition and from which said first contact piece is lifted when being moved to an open position; means for moving said first and second contact pieces relative to one another between said closed position and said open position; and a pre-stress bend in said first contact spring at an oblique angle relative to a longitudinal direction thereof.
Claim 12
Dependent Claim
52 words
A contact arrangement as claimed in claim 9, further comprising: a supporting plate having a seating edge, said first contact spring which has said angled pre-stress bend being secured to said supporting plate so that said seating edge presses against said one contact spring between said pre-stress bend and said free end.
Claim 13
Dependent Claim
27 words
A contact arrangement as claimed in claim 9, wherein said pre-stress bend is at an angle of between 0 and 30 degrees relative to said seating edge.
Claim 14
Dependent Claim
27 words
A contact arrangement as claimed in claim 11, wherein said angle of said pre-stress bend relative to said seating edge is between approximately 5 and 10 degrees.
Claim 15
Dependent Claim
18 words
A contact arrangement as claimed in claim 10, wherein said supporting plate is an armature of a relay.
Claim 16
Dependent Claim
21 words
A contact arrangement as claimed in claim 9, wherein said first contact spring is a stationary contact spring of a relay.
Claim 17
Dependent Claim
21 words
A contact arrangement as claimed in claim 9, wherein said first contact spring is a movable contact spring of a relay.
References Cited (Backward Citations)
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Cited
US4267540A
Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |