Patent US3713056A successfully refreshed from Google Patents.
US3713056A
Expired / Lapsed
US
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Electromagnetic switch assembly
Assignee: Suwa Seikosha KK
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Filing: 1971-11-15
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Granted: 1973-01-23
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Expires: 1991-11-15
Abstract
Abstract A magnetic switch assembly wherein a reed switch is mounted beneath an operative keyboard surface for operation by a permanent magnet manually brought into alignment with a predetermined location on said operative surface. The contact elements of said reed switch are displaced from a normal axis passing through said predetermined location in the path of the lines of magnetic force of said permanent magnet. A matrix of said predetermined locations may be provided on said operative keyboard surface, a reed switch being aligned with a diagonal passing through each intersection of said matrix.
Inventors
- 👤 M Hosokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:01
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0006; H01H36/0066
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A magnetic switch assembly comprising a base plate having an operative keyboard surface on one side thereof; a plurality of reed switches positioned beneath said operative keyboard surface in a matrix, each of said reed switches having contact elements; and a single permanent magnet manually and selectively displaceable toward and away from each of a corresponding plurality of predetermined locations on said operative keyboard surface, said predetermined locations being positioned in a matrix so that the contact elements of each reed switch are laterally spaced along said operative keyboard surface from a normal axIs passing through the associated predetermined location on said operative keyboard surface so that said contact elements lie in the path of the lines of magnetic force of said permanent magnet when said permanent magnet is aligned with said predetermined location adjacent said operative keyboard surface.
Claim 2
Dependent Claim
139 words
A magnetic switch assembly comprising a base plate having an operative keyboard surface on one side thereof; a plurality of reed switches positioned beneath said operative keyboard surface in a matrix, each of said reed switches having contact elements; and a single permanent magnet manually and selectively displaceable toward and away from each of a corresponding plurality of predetermined locations on said operative keyboard surface, said predetermined locations being positioned in a matrix so that the contact elements of each reed switch are laterally spaced along said operative keyboard surface from a normal axIs passing through the associated predetermined location on said operative keyboard surface so that said contact elements lie in the path of the lines of magnetic force of said permanent magnet when said permanent magnet is aligned with said predetermined location adjacent said operative keyboard surface.
Claim 3
Dependent Claim
59 words
A magnetic switch assembly as recited in claim 1, wherein said base plate is formed with a recess at each said predetermined location for positioning said permanent magnet, the thickness of said base plate being selected so that said permanent magnet is close enough to a reed switch to operate said reed switch only when positioned in a recess.
Claim 4
Dependent Claim
44 words
A magnetic switch assembly as recited in claim 1, wherein said matrix of predetermined locations is defined at the intersection of orthogonal axes, each of said reed switches being aligned on a diagonal substantially bisecting the intersecting axes at each of said predetermined locations.
Claim 5
Dependent Claim
98 words
A magnetic switch assembly comprising a base plate having an operative keyboard surface on one side thereof defining a plurality of predetermined locations aligned in a matrix; at least one reed switch having contact elements positioned adjacent the opposed side of said base plate in the region of each of said predetermined locations; and a single permanent magnet means manually and selectively displaceable toward and away from each of said predetermined locations on said operative surface, each of said reed switches being substantially aligned with a diagonal relative to said matrix passing through each of said predetermined locations.
Claim 6
Dependent Claim
98 words
A magnetic switch assembly comprising a base plate having an operative keyboard surface on one side thereof defining a plurality of predetermined locations aligned in a matrix; at least one reed switch having contact elements positioned adjacent the opposed side of said base plate in the region of each of said predetermined locations; and a single permanent magnet means manually and selectively displaceable toward and away from each of said predetermined locations on said operative surface, each of said reed switches being substantially aligned with a diagonal relative to said matrix passing through each of said predetermined locations.
Claim 7
Dependent Claim
44 words
A magnetic switch assembly as recited in claim 4, wherein said matrix of predetermined locations is defined at the intersection of orthogonal axes, each of said reed switches being aligned on a diagonal substantially bisecting the intersecting axes at each of said predetermined locations.
Claim 8
Dependent Claim
34 words
A magnetic switch assembly as recited in claim 4, wherein said base plate is formed with recesses in said operative keyboard surface at each of said predetermined locations for positioning said permanent magnet means.
Claim 9
Dependent Claim
88 words
A magnetic switch assembly as recited in claim 4, wherein said reed switch contact elements are spaced from a normal axis passing through each of said predetermined locations so that said contact elements lie in the path of the lines of magnetic force of said permanent magnet means when said permanent magnet means is aligned with said predetermined location on said operative keyboard surface, said permanent magnet means being formed with poles substantially aligned with said normal axis when said permanent magnet is positioned adjacent said operative surface.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |