Patent US3772620A successfully refreshed from Google Patents.
US3772620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition control device and system
Assignee: Deltrol Corp
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Filing: 1972-08-23
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Granted: 1973-11-13
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Expires: 1992-08-23
Abstract
Abstract A solenoid operated device includes a camming linkage between the solenoid plunger and a member actuated thereby. This camming linkage is characterized to provide a reduced load on the plunger at its starting position and to increase the load as the plunger pulls in. The magnetic force on the moveable member increases as the moveable member moves in the direction of the electro-magnet. Motion transmitting means for causing movement of a power takeoff member, the initial movement being provided by the moveable magnetic member.
Inventors
- 👤 J Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:45
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/02; H01H43/026; H01H50/00; H01H50/64; H01H50/643; H01H50/644
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
218 words
In an electro-magnetically actuated device, an electro-magnet having a coil, an open magnetic path and a movable member of magnetic material arranged to move in a direction closing said path in response to energization of the coil, the magnetic force on the movable magnetic member increasing as said member moves in said direction, a power take-off member, motion transmitting means for causing movement of the power take-off member by power provided by the movable magnetic member, means providing a normal starting position for the movable magnetic member providing a predetermined open magnetic path, means providing a normal terminal position for the movable magnetic member, said movable magnetic member being arranged normally to move from the starting position to the terminal position in response to energization of the coil, said motion transmitting means being constructed and arranged to increase the relative rate of movement of the power take-off member relative to the rate of movement of the movable magnetic member as said movable magnetic member moves from its normal starting position toward its normal terminal position, said motion transmitting means also being constructed and arranged to provide a substantially smaller relative rate of movement of the power take-off member when the movable magnetic member is at its starting position than provided as said movable member approaches its terminal position.
Claim 2
Dependent Claim
218 words
In an electro-magnetically actuated device, an electro-magnet having a coil, an open magnetic path and a movable member of magnetic material arranged to move in a direction closing said path in response to energization of the coil, the magnetic force on the movable magnetic member increasing as said member moves in said direction, a power take-off member, motion transmitting means for causing movement of the power take-off member by power provided by the movable magnetic member, means providing a normal starting position for the movable magnetic member providing a predetermined open magnetic path, means providing a normal terminal position for the movable magnetic member, said movable magnetic member being arranged normally to move from the starting position to the terminal position in response to energization of the coil, said motion transmitting means being constructed and arranged to increase the relative rate of movement of the power take-off member relative to the rate of movement of the movable magnetic member as said movable magnetic member moves from its normal starting position toward its normal terminal position, said motion transmitting means also being constructed and arranged to provide a substantially smaller relative rate of movement of the power take-off member when the movable magnetic member is at its starting position than provided as said movable member approaches its terminal position.
Claim 3
Dependent Claim
37 words
A device as specified in claim 1 in which the motion transmitting means includes a camming surface which is contacted at different points as the movable magnetic member moves from its starting position to its terminal position.
Claim 4
Dependent Claim
43 words
A device as specified in claim 2 in which the motion transmitting means comprises a first lever operated by the movable member and a second lever, said levers being pivoted at spaced points, the camming surface being associated with one of said levers.
Claim 5
Dependent Claim
44 words
A device as specified in claim 3 in which the second lever is provided with biasing means urging it against the first lever, the biasing means acting through the camming surface to urge the movable magnetic member in a direction opening the magnetic path.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |