US3742404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic latching reed relay
Assignee: Philips North America LLC
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Filing: 1972-03-16
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Granted: 1973-06-26
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Expires: 1992-03-16
Abstract
Abstract A reed relay of the multi-pole type having a magnetic latching feature. The coil for producing a flux to operate the relay is wound about an iron core which has two pair of spaced apart extended pole pieces of a substantially L shape. The plurality of reed switch capsules are accommodated in a side-by-side arrangement between the spaced pairs of pole pieces so that the coil flux is more uniformly distributed to each reed switch through the iron magnetic circuit. A permanent magnet is placed over the pole pieces so as to provide a latching feature.
Inventors
- 👤 H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:42
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/284; H01H51/285
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
A magnetic latching reed relay comprising a casing, a plurality of normally opened reed switches arranged in side-byside abutting relationship housed within said casing, a coil for causing said switches to close when the coil is energized wound about a ferromagnetic core so as to provide a low reluctance path for the flux of the coil and arranged within said casing adjacent said reed switches, two sets of spaced apart pole pieces each set attached at one end thereof to opposite ends of said core and extending in a direction parallel to the axes of said switches so as to overlap all of said switches for extending said low reluctance path, said pole pieces extending from said core to a position adjacent all of said reed switches for coupling said flux to all of the switches through said low reluctance path, means connected to said coil for supplying electrical energy thereto so as to cause energization thereof, means connected to said reed switches and extending externally of said casing for connection to external circuitry, and a single magnet housed within said casing for producing magnetic flux sufficient to maintain all of said reed switches in the closed position after said switches have been closed by energizing said coil.
Claim 2
Dependent Claim
208 words
A magnetic latching reed relay comprising a casing, a plurality of normally opened reed switches arranged in side-byside abutting relationship housed within said casing, a coil for causing said switches to close when the coil is energized wound about a ferromagnetic core so as to provide a low reluctance path for the flux of the coil and arranged within said casing adjacent said reed switches, two sets of spaced apart pole pieces each set attached at one end thereof to opposite ends of said core and extending in a direction parallel to the axes of said switches so as to overlap all of said switches for extending said low reluctance path, said pole pieces extending from said core to a position adjacent all of said reed switches for coupling said flux to all of the switches through said low reluctance path, means connected to said coil for supplying electrical energy thereto so as to cause energization thereof, means connected to said reed switches and extending externally of said casing for connection to external circuitry, and a single magnet housed within said casing for producing magnetic flux sufficient to maintain all of said reed switches in the closed position after said switches have been closed by energizing said coil.
Claim 3
Dependent Claim
172 words
The magnetic latching reed relay according to claim 1 wherein each set of said pole pieces comprises first and second substantially L shaped ferromagnetic members, one of said sets of pole pieces being connected to one magnetic pole of said core and the other set of pole pieces being connected to the other magnetic pole of said core, one leg of each pole piece being connected at the end thereof to said core, the other leg of each pole piece extending in a direction parallel to the longitudinal axes of said reed switches, said other leg of each pole piece of said first pair of pole pieces extending in a direction opposite to that of the other leg of each pole piece of said second pair of pole pieces, said plurality of reed switches being carried within the space between the otHer legs of each pair of pole pieces, so that the magnetic circuit passes from the first set of pole pieces through said switches to the second set of pole pieces.
Claim 4
Dependent Claim
40 words
The magnetic latching reed relay according to claim 2 wherein said other leg of each pole piece is extended to cover each of said reed switches thereby coupling said flux produced by said coil uniformly to each of said switches.
Claim 5
Dependent Claim
27 words
The magnetic latching reed relay according to claim 1 wherein said coil is wound about a hollow nylon coil form, said core being carried within said form.
Claim 6
Dependent Claim
50 words
The magnetic latching reed relay according to claim 1 wherein each of said reed switches comprises a glass capsule, a pair of cantilevered reed contacts carried within said capsule and spaced apart by an air gap, and a lead connected to each reed contact and extending externally of said capsule.
Claim 7
Dependent Claim
23 words
The magnetic latching reed relay according to claim 1 wherein said magnet means is a permanent magnet of the Alinco No. 5 type.
Claim 8
Dependent Claim
21 words
The magnetic latching reed relay according to claim 1 further comprising an insulating plate attached to the bottom of said casing.
Claim 9
Dependent Claim
41 words
The magnetic relay according to claim 7 wherein said means extending externally of said casing terminate in mounting pins extending normal to said insulating plate and away therefrom so as to facilitate mounting of said relay on a printed circuit board.
Claim 10
Dependent Claim
16 words
The magnetic latching reed relay according to claim 1 wherein said casing is an epoxy plastic.
Claim 11
Dependent Claim
217 words
A magnetic latching multi-pole reed relay comprising an epoxy casing, a coil for producing electromagmagnetic lines of flux when energized, housed within said casing, being wound on a hollow-nylon form, a core for providing a low reluctance path for said flux arranged within the hollow of said form, a plurality of reed switch elements each comprising a glass capsule, a pair of spaced apart reed contacts within said capsule, and a lead attached to each of said reed contacts and extending externally of said capsule, means connected to each of said leads and extending externally of said casing for connection to external circuitry, two pair of spaced apart ferromagnetic pole pieces, each pair attached to opposite poles of said core extending in a direction parallel to the axes of said reed switches and adjacent said plurality of switches for extending said low reluctance path to said switches so as to uniformly distribute the flux generated by said coil when energized to each of said reed switches thereby causing more uniform operation thereof, means connected to said coil and extending externally of said casing for supplying electrical energy thereto so as to cause operation of said reed switches, and a permanent magnet housed within said casing for maintaining said reed switches closed after said coil has been deenergized.
Claim 12
Dependent Claim
217 words
A magnetic latching multi-pole reed relay comprising an epoxy casing, a coil for producing electromagmagnetic lines of flux when energized, housed within said casing, being wound on a hollow-nylon form, a core for providing a low reluctance path for said flux arranged within the hollow of said form, a plurality of reed switch elements each comprising a glass capsule, a pair of spaced apart reed contacts within said capsule, and a lead attached to each of said reed contacts and extending externally of said capsule, means connected to each of said leads and extending externally of said casing for connection to external circuitry, two pair of spaced apart ferromagnetic pole pieces, each pair attached to opposite poles of said core extending in a direction parallel to the axes of said reed switches and adjacent said plurality of switches for extending said low reluctance path to said switches so as to uniformly distribute the flux generated by said coil when energized to each of said reed switches thereby causing more uniform operation thereof, means connected to said coil and extending externally of said casing for supplying electrical energy thereto so as to cause operation of said reed switches, and a permanent magnet housed within said casing for maintaining said reed switches closed after said coil has been deenergized.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |