US3676811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic switch
Assignee: Alarm Products International Inc
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Filing: 1971-03-19
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Granted: 1972-07-11
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Expires: 1991-03-19
Abstract
Abstract A magnetic switch device comprises a housing, two substantially planar bifurcated flexible members arranged in opposing relationship with one pair of distal ends of corresponding leg segments overlapping and being free to move while the other pair of distal ends are fixed to the housing. Armatures are attached to the corresponding leg segments and are moved responsive to a magnetic force to cause contacts on the overlapping distal ends to move together with a brushing motion.
Inventors
- 👤 Philip Joseph Parlato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:35
CPC Classifications
H; H01; H01H; H01H36/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A magnetic switch actuated by a magnetic force comprising a housing, two substantially planar bifurcated flexible members having first and second leg segments terminating in first and second distal ends, respectively, said members being coupled to said housing in an opposing relationship with corresponding first distal ends of said members being free and overlapping each other, electrical contacts mounted on said corresponding first distal ends, said second distal ends being fixed to said housing, and magnetically responsive armatures connected to each of said first leg segments whereby said two members are adapted for moving from unflexed to flexed conditions responsive to a magnetic force and with the resultant stresses being distributed throughout said flexible members.
Claim 2
Dependent Claim
115 words
A magnetic switch actuated by a magnetic force comprising a housing, two substantially planar bifurcated flexible members having first and second leg segments terminating in first and second distal ends, respectively, said members being coupled to said housing in an opposing relationship with corresponding first distal ends of said members being free and overlapping each other, electrical contacts mounted on said corresponding first distal ends, said second distal ends being fixed to said housing, and magnetically responsive armatures connected to each of said first leg segments whereby said two members are adapted for moving from unflexed to flexed conditions responsive to a magnetic force and with the resultant stresses being distributed throughout said flexible members.
Claim 3
Dependent Claim
39 words
A magnetic switch as set forth in claim 1, wherein each of said two members comprises an intermediate zone joining respective first and second leg segments, each of said two members being monolithic and being of flat sheet metal.
Claim 4
Dependent Claim
15 words
A magnetic switch as set forth in claim 2, wherein said two members are U-shaped.
Claim 5
Dependent Claim
120 words
A magnetic switch as set forth in claim 1, wherein a brushing movement is effected between said contacts, at least one of said first leg segments being in a cantilevered relationship with the corresponding armature, said armatures being separated by greater distance than said contacts, said magnetic force causing said armatures to become oppositely magnetized and be attracted toward each other, said armatures moving toward each other causing said contacts to touch, a restraining force exerted by said leg segment in cantilevered relationship restraining further movement of said armatures, said oppositely magnetized armatures having a magnetic force of attraction greater than said restraining force, said armatures continuing to move towards each other after said contacts touch to effect said brushing.
Claim 6
Dependent Claim
22 words
A magnetic switch as set forth in claim 4, wherein said armatures overlap and touch each other responsive to said magnetic force.
Claim 7
Dependent Claim
25 words
A magnetic switch as set forth in claim 1, comprising terminal posts for said switch electrically connected to said second distal ends of said members.
Claim 8
Dependent Claim
19 words
A magnetic switch as set forth in claim 6, comprising a separate cover plate for covering said terminal posts.
Claim 9
Dependent Claim
26 words
A magnetic switch as set forth in claim 1, wherein said electrical contacts are normally in a closed position and are flexed to an open position.
Claim 10
Dependent Claim
26 words
A magnetic switch as set forth in claim 1, wherein said electrical contacts are normally in an open position and are flexed to a closed position.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |