US3569878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic latch attachment with relays
Assignee: Schneider Electric USA Inc
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Filing: 1969-05-05
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Granted: 1971-03-09
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Expires: 1989-05-05
Abstract
Abstract A permanent magnet latch attachment which magnetically latches an electromagnetically driven contact carrier of an electromagnetically operated switch device in an operating position against the force of a biasing spring which, when the latch attachment is rendered inoperative by energization of a release coil, returns the carrier to starting position. A connecting pin is rotatable about an axis eccentric to its own axis adjusts the flux gap of the latch. The latch attachment and release coil are mounted between the rear of the relay base and a mounting panel for the relay.
Inventors
- 👤 William E Grass
- 👤 Robert D Boley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:07
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06; H01H51/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
241 words
An electromagnetically operated switch device including: a base; a movable contact carrier mounted on the base for movement in opposite directions along a predetermined path to contact making and contact breaking positions, respectively; a permanent magnet assembly; a magnetically attractive assembly; a support supporting one of the assemblies for movement along a predetermined path; connecting means connecting a movable one of said assemblies to the carrier for movement in a fixed relation to the movement of the carrier; biasing means biasing the carrier to one of said positions; an electromagnetic means carried by the base and operative when energized to drive the carrier against the force of the biasing means to the other of said positions; said assemblies having poles normally spaced apart when the carrier is held by the biasing means in said one position; and the movable one of said assemblies being movable sufficiently close to the other of said assemblies so that the assemblies will be held magnetically in fixed relation to each other after the carrier has been moved to said other position against the biasing force of the biasing means and the electromagnetic means has been deenergized; and an electromagnetic release coil arranged when energized, to produce magnetic flux in opposition to the magnetic flux of the permanent magnet assembly sufficient to render the resultant flux attraction between said assemblies inadequate to hold the carrier in said other position against the force of the biasing means.
Claim 2
Dependent Claim
241 words
An electromagnetically operated switch device including: a base; a movable contact carrier mounted on the base for movement in opposite directions along a predetermined path to contact making and contact breaking positions, respectively; a permanent magnet assembly; a magnetically attractive assembly; a support supporting one of the assemblies for movement along a predetermined path; connecting means connecting a movable one of said assemblies to the carrier for movement in a fixed relation to the movement of the carrier; biasing means biasing the carrier to one of said positions; an electromagnetic means carried by the base and operative when energized to drive the carrier against the force of the biasing means to the other of said positions; said assemblies having poles normally spaced apart when the carrier is held by the biasing means in said one position; and the movable one of said assemblies being movable sufficiently close to the other of said assemblies so that the assemblies will be held magnetically in fixed relation to each other after the carrier has been moved to said other position against the biasing force of the biasing means and the electromagnetic means has been deenergized; and an electromagnetic release coil arranged when energized, to produce magnetic flux in opposition to the magnetic flux of the permanent magnet assembly sufficient to render the resultant flux attraction between said assemblies inadequate to hold the carrier in said other position against the force of the biasing means.
Claim 3
Dependent Claim
43 words
The structure according to claim 1 wherein: said base has a wall; said carrier, electromagnetic means, and biasing means are mounted on the base in front of said wall; and said assemblies and release coil are disposed at the rear of said wall.
Claim 4
Dependent Claim
54 words
The structure according to claim 2 wherein the support is an open front housing juxtaposed at its front against the rear of said wall and enclosing said assemblies and release coil between the wall of the base and a mounting panel when the switch device is installed in operating position on an instrument panel.
Claim 5
Dependent Claim
19 words
The structure according to claim 3 wherein the base and said housing each is an open front die casting.
Claim 6
Dependent Claim
84 words
The structure according to claim 2 wherein: lineal guideways are provided on the front of said wall of said base; the carrier is mounted in the guideways for reciprocation along its said path; the connecting means comprise additional lineal guideways in tHe housing parallel to the guideways on said wall of the base and a second carrier mounted in said additional guideways and supporting the movable one of said assemblies for movement with the second carrier; and said movable assembly includes a permanent magnet.
Claim 7
Dependent Claim
19 words
The structure according to claim 5 wherein the second carrier is a pole piece of the permanent magnet assembly.
Claim 8
Dependent Claim
81 words
The structure according to claim 5 wherein the magnetically attractive assembly comprises two plates of flux conducting material in face to face spaced relation to each other and secured in the housing each with an end face facing toward the permanent magnet assembly and providing poles for the release coil; said plates have centering bosses of flux conducting material extending from their adjacent faces, respectively, and received in, and positioning, said release coil in the housing and providing a core therefor.
Claim 9
Dependent Claim
81 words
The structure according to claim 1 wherein said connecting means comprises a first part connected to said movable assembly for rotation about a predetermined axis extending transversely of said path, and a second part in fixed position relative to the first part, and connected to the movable contact carrier for rotation relative thereto about another axis parallel to and offset radially from said predetermined axis; and means for securing one of said parts against rotation in selected rotated positions thereof, respectively.
Claim 10
Dependent Claim
47 words
The structure according to claim 1 wherein the permanent magnet assembly is positioned at all times relative to the electromagnetic means so that the flux path of the permanent magnet assembly is separate and distinct from, and isolated magnetically from, the flux path of the electromagnetic means.
References Cited (Backward Citations)
US3377519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |