Patent US3708723A successfully refreshed from Google Patents.
US3708723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low power magnetic circuit breaker
Assignee: Airpax Electronics Inc
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Filing: 1971-03-05
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Granted: 1973-01-02
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Expires: 1991-03-05
Abstract
Abstract Disclosed is a circuit breaker which may be operated on relatively low power. It comprises a polarized relay having a spring-biased armature rotatable to trip a conventional circuit breaker toggle. The armature is released by the flux from a low power coil bucking out the polarizing flux from a permanent magnet. The breaker is disclosed in overvoltage protection and/or undervoltage protections circuits, as well as in a ground fault interruption circuit, and may be used with a conventional breaker overcurrent coil and toggle trip assembly.
Inventors
- 👤 J Shand
- 👤 W Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:50
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/24; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/32; H02H3/20; H02H3/202; H01H71/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
An undervoltage protector comprising a pair of relatively movable contacts, a collapsible toggle including a toggle latch mechanically coupled to one of said contacts, a magnetic core, a partial magnetic shunt magnetically coupled to said core, a permanent magnet adjacent said core for polarizing said core, first and second differentially would coils magnetically coupled to said core, an armature including a polepiece adjacent said core and adapted to be restrained against said core by the flux from said permanent magnet, means resiliently biasing said armature away from said core, means for mechanically coupling said armature to said toggle latch whereby said toggle is tripped when said armature moves away from said core, a pair of input terminals, rectifier means coupling each of said coils across said input terminals, and voltage regulator means coupled to one of said coils for maintaining a substantially constant voltage across said one coil.
Claim 2
Dependent Claim
148 words
An undervoltage protector comprising a pair of relatively movable contacts, a collapsible toggle including a toggle latch mechanically coupled to one of said contacts, a magnetic core, a partial magnetic shunt magnetically coupled to said core, a permanent magnet adjacent said core for polarizing said core, first and second differentially would coils magnetically coupled to said core, an armature including a polepiece adjacent said core and adapted to be restrained against said core by the flux from said permanent magnet, means resiliently biasing said armature away from said core, means for mechanically coupling said armature to said toggle latch whereby said toggle is tripped when said armature moves away from said core, a pair of input terminals, rectifier means coupling each of said coils across said input terminals, and voltage regulator means coupled to one of said coils for maintaining a substantially constant voltage across said one coil.
Claim 3
Dependent Claim
20 words
An undervoltage protector according to claim 1 wherein said voltage regulator means comprises a zener diode across said one coil.
Claim 4
Dependent Claim
135 words
An overvoltage protector comprising a pair of relatively movable contacts, a collapsible toggle including a toggle latch mechanically coupled to one of said contacts, a magnetic core, a partial magnetic shunt coupled to said core, a permanent magnet adjacent said core for polarizing said core, a coil magnetically coupled to said core, an armature including a polepiece adjacent said core and adapted to be restrained against said core by the flux from said permanent magnet, means resiliently biasing said armature away from said core, means for mechanically coupling said armature to said toggle latch whereby said toggle is tripped when said armature moves away from said polepiece, a pair of shunt terminals, rectifier means, and voltage regulating means, said rectifier means, voltage regulating means and coil all being connected in series with said input terminals.
Claim 5
Dependent Claim
135 words
An overvoltage protector comprising a pair of relatively movable contacts, a collapsible toggle including a toggle latch mechanically coupled to one of said contacts, a magnetic core, a partial magnetic shunt coupled to said core, a permanent magnet adjacent said core for polarizing said core, a coil magnetically coupled to said core, an armature including a polepiece adjacent said core and adapted to be restrained against said core by the flux from said permanent magnet, means resiliently biasing said armature away from said core, means for mechanically coupling said armature to said toggle latch whereby said toggle is tripped when said armature moves away from said polepiece, a pair of shunt terminals, rectifier means, and voltage regulating means, said rectifier means, voltage regulating means and coil all being connected in series with said input terminals.
Claim 6
Dependent Claim
16 words
An overvoltage protector acCording to claim 3 wherein said voltage regulating means comprises a zener diode.
Claim 7
Dependent Claim
162 words
A combination undervoltage and overvoltage protector comprising a pair of relatively movable contacts, a collapsible toggle including a toggle latch mechanically coupled to one of said contacts, a magnetic core, a partial magnetic shunt coupled to said core, a permanent magnet adjacent said core for polarizing said core, first and second differentially wound coils magnetically coupled to said core, a third coil magnetically coupled to said core, an armature including a polepiece adjacent said core and adapted to be restrained against said core by the flux from said permanent magnet, means resiliently biasing said armature away from said core, means for mechanically coupling said armature to said toggle latch whereby said toggle is tripped when said armature moves away from said core, a pair of input terminals, rectifier means coupling each of said coils across said input terminals, a first zener diode coupled across one of said differentially wound coils, and a second zener diode coupled in series with said third coil.
Claim 8
Dependent Claim
162 words
A combination undervoltage and overvoltage protector comprising a pair of relatively movable contacts, a collapsible toggle including a toggle latch mechanically coupled to one of said contacts, a magnetic core, a partial magnetic shunt coupled to said core, a permanent magnet adjacent said core for polarizing said core, first and second differentially wound coils magnetically coupled to said core, a third coil magnetically coupled to said core, an armature including a polepiece adjacent said core and adapted to be restrained against said core by the flux from said permanent magnet, means resiliently biasing said armature away from said core, means for mechanically coupling said armature to said toggle latch whereby said toggle is tripped when said armature moves away from said core, a pair of input terminals, rectifier means coupling each of said coils across said input terminals, a first zener diode coupled across one of said differentially wound coils, and a second zener diode coupled in series with said third coil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |