US3611220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition-responsive monitor
Assignee: Individual
•
Filing: 1970-07-20
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Granted: 1971-10-05
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Expires: 1990-07-20
Abstract
Abstract A fluid pressure responsive device having two magnets with like poles facing each other. A first magnet is mounted with a piston to be movable in response to fluid pressure toward the other magnet to thus cause the other magnet to move due to repelling forces of the adjacent magnetic poles. A fixed armature, which may be adjustable, is located in the field of influence of said poles to control the repelling force which occurs between the magnets. The second magnet may used to actuate an indicating device.
Inventors
- 👤 Leslie J Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:55
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0073
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
232 words
A condition-responsive monitor comprising, in combination: a. a permanent master magnet, b. means mounting the master magnet for movement in either of opposite directions along a predetermined path of travel, c. a drive device responsive to changes in a condition, for shifting said permanent magnet in said path, d. a permanent slave magnet, e. means mounting the slave magnet for movement in either of opposite directions along a predetermined path of travel adjoining and noncoincidental with said first-mentioned path of travel, f. said magnets being arranged with a pair of like poles directed toward each other, thereby causing opposing forces to exist between the magnets, which tend to separate the same, g. a stationary magnetic armature piece disposed in the field of influence of said like poles of the magnets, adjacent the paths of travel of the same, h. means biasing said master magnet to a position away from said armature piece whereby it is movable toward the piece and against said biasing means in response to changes in said condition, i. said slave magnet being normally close to the armature piece, dominating the magnetization thereof, and producing a flux therein according to a given polarity, movement of the master magnet a given distance toward the armature piece overcoming the magnetic influence thereon by the slave magnet and driving the latter away from the armature piece to a position relatively remote therefrom.
Claim 2
Dependent Claim
232 words
A condition-responsive monitor comprising, in combination: a. a permanent master magnet, b. means mounting the master magnet for movement in either of opposite directions along a predetermined path of travel, c. a drive device responsive to changes in a condition, for shifting said permanent magnet in said path, d. a permanent slave magnet, e. means mounting the slave magnet for movement in either of opposite directions along a predetermined path of travel adjoining and noncoincidental with said first-mentioned path of travel, f. said magnets being arranged with a pair of like poles directed toward each other, thereby causing opposing forces to exist between the magnets, which tend to separate the same, g. a stationary magnetic armature piece disposed in the field of influence of said like poles of the magnets, adjacent the paths of travel of the same, h. means biasing said master magnet to a position away from said armature piece whereby it is movable toward the piece and against said biasing means in response to changes in said condition, i. said slave magnet being normally close to the armature piece, dominating the magnetization thereof, and producing a flux therein according to a given polarity, movement of the master magnet a given distance toward the armature piece overcoming the magnetic influence thereon by the slave magnet and driving the latter away from the armature piece to a position relatively remote therefrom.
Claim 3
Dependent Claim
53 words
A condition-responsive monitor as in claim 1, wherein: a. said armature piece is disposed between said like poles of the magnets, b. said slave magnet being driven away from the armature piece with a snap action when the master magnet overcomes the slave magnetization of said piece as it moves toward the latter.
Claim 4
Dependent Claim
53 words
A condition-responsive monitor as in claim 1, wherein: a. said armature piece is disposed adjacent the space between said like poles of the magnets, b. said slave magnet shifting slowly away from the armature piece when the master magnet overcomes the slave magnetization of said piece as it slowly moves toward the latter.
Claim 5
Dependent Claim
45 words
A condition-responsive monitor as in claim 1, wherein: a. said drive device comprises a piston and cylinder, b. said master magnet being connected to said piston to be shifted thereby, c. said cylinder having passages at opposite ends of the piston to admit pressurized fluid.
Claim 6
Dependent Claim
61 words
A condition-responsive monitor as in claim 1, wherein: a. said armature piece comprises a magnetic wire, and b. means for adjustably posItioning said wire, said means comprising a screw carrying said wire in alignment with its axis whereby turning of the screw either advances the wire into the space between said like magnet poles or retracts the wire from said space.
Claim 7
Dependent Claim
50 words
A condition-responsive monitor as in claim 1, wherein: a. said armature piece comprises a strip of magnetic sheet metal, and b. means for adjustably positioning said strip, said means comprising pivot means for enabling the strip to be swung into or out of the space between said like magnet poles.
Claim 8
Dependent Claim
38 words
A condition-responsive monitor as in claim 1, and further including: a. a magnetic keeper disposed in the path of travel of the slave magnet, for yieldably holding the latter in shifted position as effected by the master magnet.
Claim 9
Dependent Claim
32 words
A condition-responsive monitor as in claim 1, and further including: a. a microswitch, and b. means for actuating said switch in response to shifting of the slave magnet by said master magnet.
Claim 10
Dependent Claim
47 words
A condition-responsive monitor as in claim 1, and further including: a. a reed switch having a magnetic actuator member, b. said reed switch being disposed in the field of influence of the slave magnet to be actuated thereby when the magnet is shifted by the master magnet.
Claim 11
Dependent Claim
45 words
A condition-responsive monitor as in claim 1, and further including: a. a pilot light, b. an energizing circuit for the pilot light, and c. cooperable contacts controlling said energizing circuit and actuated by said slave magnet when the latter is shifted by said master magnet.
Claim 12
Dependent Claim
36 words
A condition-responsive monitor as in claim 1, and further including: a. pairs of electrical contacts respectively bridged by the slave magnet when the latter is either close to said armature piece or else shifted away therefrom.
Claim 13
Dependent Claim
49 words
A condition-responsive monitor as in claim 4, and further including: a. a tubular housing comprising said cylinder, b. said master and slave magnets being axially shiftable in the bore of the housing, c. said biasing means comprising a coil spring in the housing bore and encircling the master magnet.
References Cited (Backward Citations)
US3077854A
Cited
US3293579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |