Patent US3774058A successfully refreshed from Google Patents.
US3774058A
Expired / Lapsed
US
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Force transducer
Assignee: Permawick Co
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Filing: 1972-06-30
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Granted: 1973-11-20
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Expires: 1992-06-30
Abstract
Abstract A movable armature is arranged between a pair of juxtaposed permanent magnet assemblies each carrying a respective pair of electrical coils. The armature is slidably connected to a two-way motion transmitting mechanism which is subjected to the force or movement to be sensed. The motion transmitting mechanism is adapted to push the armature toward either one of the magnet assemblies until at a predetermined spacing, the magnetic attraction is sufficient to accelerate the armature into engagement with the magnet assembly. The coils are electrically connected such that the current induced by the flux change during the armature acceleration is additive and of opposite polarity, but equal magnitude, depending on the direction of acceleration of the armature.
Inventors
- 👤 M Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:15
CPC Classifications
H; H02; H02K; H02K35/00; H02K35/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
122 words
A transducer for producing an electrical output signal indicative of a condition to be sensed, comprising a pair of spaced magnets, an armature movable between said magnets, two-way motion transmitting means for moving said armature both forward and backward between said magnets, said armature being free to move independently in the same direction as said armature is being moved by said motion transmitting means so that said armature is accelerated independently of said motion transmitting means by the magnetic attraction of either one of said magnets when said armature is at a predetermined spacing therefrom, and means for produCing said electrical output signal in response to the change in flux associated with either one of said magnets during acceleration of said armature.
Claim 2
Dependent Claim
122 words
A transducer for producing an electrical output signal indicative of a condition to be sensed, comprising a pair of spaced magnets, an armature movable between said magnets, two-way motion transmitting means for moving said armature both forward and backward between said magnets, said armature being free to move independently in the same direction as said armature is being moved by said motion transmitting means so that said armature is accelerated independently of said motion transmitting means by the magnetic attraction of either one of said magnets when said armature is at a predetermined spacing therefrom, and means for produCing said electrical output signal in response to the change in flux associated with either one of said magnets during acceleration of said armature.
Claim 3
Dependent Claim
23 words
The transducer of claim 1, wherein said means for producing an electrical output includes at least one coil operatively associated with each magnet.
Claim 4
Dependent Claim
25 words
The transducer of claim 2, further comprising at least one pole piece attached to each said magnet, said coil being disposed on said pole piece.
Claim 5
Dependent Claim
24 words
The transducer of claim 1, wherein the magnetic poles of said magnets are both aligned perpendicularly with respect to the distance between said magnets.
Claim 6
Dependent Claim
45 words
The transducer of claim 4, wherein said means for producing an electrical output signal includes a pair of pole pieces attached respectively to either end of each said magnet at the magnetic poles thereof, and an electrical coil operatively disposed on each said pole piece.
Claim 7
Dependent Claim
30 words
The transducer of claim 5, wherein said coils are interconnected such that the current induced in said coils during a given acceleration of said armature is in the same direction.
Claim 8
Dependent Claim
49 words
The transducer of claim 5, wherein said coils are interconnected such that the current induced through said coils is in one direction when said armature is accelerated toward one of said magnets and in the other direction when said armature is accelerated toward the other one of said magnets.
Claim 9
Dependent Claim
29 words
The transducer of claim 7, wherein the magnitude of the current through said coils is approximately the same when said armature is accelerated toward either one of said magnets.
Claim 10
Dependent Claim
87 words
The transducer of claim 1, wherein said motion transmitting means includes a pair of parallel shafts arranged on each side of said pair of magnets and connected together for longitudinal movement, each said shaft having an intermediate portion of reduced width adjacent to the gap between said magnets, said armature having a pair of apertures formed therein respectively slidably receiving said intermediate portions of said shafts, the length of said intermediate portions being sufficient to permit confined independent movement of said armature with respect to said shafts.
Claim 11
Dependent Claim
23 words
The transducer of claim 9, wherein said actuating means further includes resilient means operatively disposed to urge said shafts longitudinally in one direction.
Claim 12
Dependent Claim
133 words
A transducer for producing an electrical output signal indicative of a condition to be sensed, comprising two magnets in spaced adjacency, an armature movable between said magnets, actuating means having a pair of interconnected working surfaces for pushing said armature between said magnets in opposite directions corresponding to a change in an object whose condition is being sensed, the distance between said working surfaces providing confined independent movement of said armature with respect to said actuating means so that said armature is accelerated independently of said actuating means by the attraction of either one of said magnets when said armature is spaced a predetermined distance therefrom, and means for producing said electrical output signal in response to the change in flux associated with either one of said magnets during acceleration of said armature.
Claim 13
Dependent Claim
133 words
A transducer for producing an electrical output signal indicative of a condition to be sensed, comprising two magnets in spaced adjacency, an armature movable between said magnets, actuating means having a pair of interconnected working surfaces for pushing said armature between said magnets in opposite directions corresponding to a change in an object whose condition is being sensed, the distance between said working surfaces providing confined independent movement of said armature with respect to said actuating means so that said armature is accelerated independently of said actuating means by the attraction of either one of said magnets when said armature is spaced a predetermined distance therefrom, and means for producing said electrical output signal in response to the change in flux associated with either one of said magnets during acceleration of said armature.
Claim 14
Dependent Claim
112 words
A transducer for sensing a condition and producing an electrical output pulse in response thereto, comprising a pair of magnets spaced from each other, an electrical coil operatively associated with each said magnet for sensing flux changes, an armature movably disposed between said magnets, an actuating element positionally responsive to the object whose condition is being sensed, and two-way motion transmitting means operatively connected between said armature and said actuating element for moving said armature toward either one of said magnets until said armature is spaced therefrom by a predetermined distance whereupon the magnetic attraction of said magnet accelerates said armature toward said magnet thereby inducing current in said coil associated therewith.
Claim 15
Dependent Claim
112 words
A transducer for sensing a condition and producing an electrical output pulse in response thereto, comprising a pair of magnets spaced from each other, an electrical coil operatively associated with each said magnet for sensing flux changes, an armature movably disposed between said magnets, an actuating element positionally responsive to the object whose condition is being sensed, and two-way motion transmitting means operatively connected between said armature and said actuating element for moving said armature toward either one of said magnets until said armature is spaced therefrom by a predetermined distance whereupon the magnetic attraction of said magnet accelerates said armature toward said magnet thereby inducing current in said coil associated therewith.
Claim 16
Dependent Claim
105 words
A transducer, comprising magnetic means for producIng two adjacent regions of high magnetic flux density, a ferromagnetic member movable between said regions, actuating means for pushing said member both forward and backward between said regions in a direction corresponding to a change in an object whose condition is being sensed, said member being accelerated independently of said actuating means by either one of said magnetic regions when said member is at a respective predetermined location between said regions, and means for producing an electric output signal in response to the change in flux associated with either one of said regions during acceleration of said member.
Claim 17
Dependent Claim
105 words
A transducer, comprising magnetic means for producIng two adjacent regions of high magnetic flux density, a ferromagnetic member movable between said regions, actuating means for pushing said member both forward and backward between said regions in a direction corresponding to a change in an object whose condition is being sensed, said member being accelerated independently of said actuating means by either one of said magnetic regions when said member is at a respective predetermined location between said regions, and means for producing an electric output signal in response to the change in flux associated with either one of said regions during acceleration of said member.
Claim 18
Dependent Claim
100 words
A transducer for producing an electrical output signal indicative of a condition to be sensed, comprising two spaced magnets, an armature movable between said magnets, two-way motion transmitting means for moving said armature between said magnets in either direction and for permitting independent acceleration of said armature in the direction of movement such that said armature is accelerated by magnetic attraction toward either one of said magnets at a predetermined spacing therefrom, and means for producing said electrical output signal in response to the change in flux associated with either one of said magnets during acceleration of said armature thereto.
Claim 19
Dependent Claim
100 words
A transducer for producing an electrical output signal indicative of a condition to be sensed, comprising two spaced magnets, an armature movable between said magnets, two-way motion transmitting means for moving said armature between said magnets in either direction and for permitting independent acceleration of said armature in the direction of movement such that said armature is accelerated by magnetic attraction toward either one of said magnets at a predetermined spacing therefrom, and means for producing said electrical output signal in response to the change in flux associated with either one of said magnets during acceleration of said armature thereto.
Claim 20
Dependent Claim
65 words
A transducer, comprising a movable armature, means for selectively moving said armature in either of two directions and allowing indpendent acceleration thereof in the direction of said movement, means for subjecting said armature to the same amount of magnetic acceleration in either of said two directions depending on the position of said armature, and means for producing an output signal in response to said acceleration.
Claim 21
Dependent Claim
65 words
A transducer, comprising a movable armature, means for selectively moving said armature in either of two directions and allowing indpendent acceleration thereof in the direction of said movement, means for subjecting said armature to the same amount of magnetic acceleration in either of said two directions depending on the position of said armature, and means for producing an output signal in response to said acceleration.
Claim 22
Dependent Claim
38 words
The transducer of claim 12, wherein said coils are interconnected such that the current induced therein is additive for a given acceleration of said armature and of opposite polarity for respective opposite directions of acceleration of said armature.
References Cited (Backward Citations)
US3351850A
Cited
US3024374A
Cited
US3129347A
Cited
US3132268A
Cited
US3398302A
Cited
US3453573A
Cited
US3463946A
Cited
US3633053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |