US3705368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microminiature relay
Assignee: Trane US Inc
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Filing: 1971-07-23
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Granted: 1972-12-05
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Expires: 1991-07-23
Abstract
Abstract An all-welded hermetically sealed microminiature relay is substantially free of armature bounce. The relay includes an electromagnet and a pivotal armature which is spring biased in a unique manner to remove some of the kinetic energy from the armature as it moves to its deenergized position. The relay includes a contact arrangement having a plurality of fixed contacts and at least one movable contact actuated by the movement of the armature for performing the transfer switching functions of the relay. It has been found that the dropout to pickup current ratio of any given relay may be changed by varying the length of the pole faces.
Inventors
- 👤 Richard H Williams Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:31
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
214 words
In an electromagnetic relay comprising, a supporting header and contact assembly, an electromagnetic assembly, an armature assembly, a bearing assembly, a return spring, and a cover, said header and contact assembly including a plurality of contact points extending therethrough and a plurality of movable and stationary contacts secured to respective ones of said plurality of contact points, said electromagnetic assembly having an electrically energizable coil wound around a magnetic core, a first and a second pole piece secured to the respective ends of said magnetic core, said bearing assembly including an upper and a lower bearing bracket with each having an aligned aperture, said armature assembly including an armature member having a pair of pivot portions which are journaled in said aligned apertures, said armature member including at least one actuator for opening and closing said movable and stationary contacts as said armature member moves between its deenergized and its energized positions, said return spring having one end fixedly secured with respect to one of said pole pieces and having the other end retained by said actuator, said return spring having an intermediate portion engaging a surface of said armature member so that armature bounce is prevented when said coil is deenergized and said armature member moves from its energized to its deenergized position.
Claim 2
Dependent Claim
214 words
In an electromagnetic relay comprising, a supporting header and contact assembly, an electromagnetic assembly, an armature assembly, a bearing assembly, a return spring, and a cover, said header and contact assembly including a plurality of contact points extending therethrough and a plurality of movable and stationary contacts secured to respective ones of said plurality of contact points, said electromagnetic assembly having an electrically energizable coil wound around a magnetic core, a first and a second pole piece secured to the respective ends of said magnetic core, said bearing assembly including an upper and a lower bearing bracket with each having an aligned aperture, said armature assembly including an armature member having a pair of pivot portions which are journaled in said aligned apertures, said armature member including at least one actuator for opening and closing said movable and stationary contacts as said armature member moves between its deenergized and its energized positions, said return spring having one end fixedly secured with respect to one of said pole pieces and having the other end retained by said actuator, said return spring having an intermediate portion engaging a surface of said armature member so that armature bounce is prevented when said coil is deenergized and said armature member moves from its energized to its deenergized position.
Claim 3
Dependent Claim
21 words
An electromagnetic relay as defined in claim 1, wherein said return spring is in the form of an elongated leaf spring.
Claim 4
Dependent Claim
44 words
An electromagnetic relay as defined in claim 1, wherein said first and said second pole pieces are L-shaped and said upper and said lower bearing brackets are secured to the respective top and bottom surfaces of the free ends of said L-shaped pole pieces.
Claim 5
Dependent Claim
30 words
An electromagnetic relay as defined in claim 1, wherein one of said upper and said lower brackets includes a bendable tab for adjusting the deenergized position of said armature member.
Claim 6
Dependent Claim
24 words
An electromagnetic relay as defined in claim 1, wherein the other end of said return spring is in hooking engagement with said one actuator.
Claim 7
Dependent Claim
55 words
An electromagnetic relay as defined in claim 1, wherein the end remote from said contacts of said actuator is formed with a hook portion which allows free play to exist with the other end of said return spring so that said intermediate portion of said return spring rubs against the surface of said armature member.
Claim 8
Dependent Claim
54 words
An electromagnetic relay as defined in claim 1, wherein said armature member is formed of an elongated flat piece of magnetic material which is pivoted about an axis orthogonal to the planar surface of said header, said armature member including an actuator attached to each end of said elongated flat piece of magnetic material.
Claim 9
Dependent Claim
44 words
An electromagnetic relay as defined in claim 6, wherein said other end of said return spring is offset so that said return spring passes over one leg of the hook portion and said return spring passes under the other leg of the hook portion.
Claim 10
Dependent Claim
31 words
An electromagnetic relay as defined in claim 3, wherein the pole faces of said L-shaped pole pieces extend toward each other and parallel to the longitudinal axis of said magnetic core.
Claim 11
Dependent Claim
27 words
An electromagnetic relay as defined in claim 9, wherein the relay dropout to pickup current ratio may be changed by varying the lengths of the pole faces.
Claim 12
Dependent Claim
31 words
An electromagnetic relay as defined in claim 9, wherein the relay dropout to pickup ratio may be increased and decreased by increasing and decreasing the size of the pole faces, respectively.
Claim 13
Dependent Claim
23 words
An electromagnetic relay as defined in claim 1, wherein said return spring has said one end rigidly attached to said one pole piece.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |