US3582844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reed switch matrix with high frequency transmission capability
Assignee: CUNNINGHAM CORP
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Filing: 1969-07-07
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Granted: 1971-06-01
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Expires: 1989-07-07
Abstract
Abstract A strip-line crossbar switch with reed switches at the crosspoints and optional magnetic latching, especially suitable for switching signals at frequencies of up to several tens of megahertz. Magnetic fields for actuating the reed switches are applied transversely across, and highly concentrated at the contact points. The actuating fields are generated by coils wound on magnetic cores, and are directed to the reed switches by pole pieces, which extend along and on opposite sides of the reed switches, and also function as magnetic shields to reduce magnetic coupling between adjacent cross-points.
Inventors
- 👤 Larry L Launt
- 👤 Gary E Northrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:43
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/22; H01H67/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A crossbar switch comprising a deck of printed circuit cards carrying X and Y conductors in strip-line form, an array of reed switches on an outer surface of said deck for selectively connecting respective ones of said X conductors to respective ones of said Y conductors, said deck having apertures extending through it and lined with conductive material for electrically connecting said X and Y conductors to points on the outer surface of said deck, pins fitted in said apertures for mounting and electrically connecting said reed switches to said conductive material, and magnetic actuators mounted adjacent to said reed switches for selectively actuating them.
Claim 2
Dependent Claim
105 words
A crossbar switch comprising a deck of printed circuit cards carrying X and Y conductors in strip-line form, an array of reed switches on an outer surface of said deck for selectively connecting respective ones of said X conductors to respective ones of said Y conductors, said deck having apertures extending through it and lined with conductive material for electrically connecting said X and Y conductors to points on the outer surface of said deck, pins fitted in said apertures for mounting and electrically connecting said reed switches to said conductive material, and magnetic actuators mounted adjacent to said reed switches for selectively actuating them.
Claim 3
Dependent Claim
78 words
A crossbar switch according to claim 1, wherein said switches are aligned in parallel array, and said actuators are aligned parallel with said switches and include pole pieces of magnetically permeable material extending along opposite sides of said switches and terminating adjacent to the midpoints therealong, said pole pieces serving to concentrate the flux developed by said actuators near the contact tip portions of the reeds of said switches and also to shield said switches against stray fields.
Claim 4
Dependent Claim
127 words
A crossbar switch according to claim 4 including an auxiliary printed circuit board, electromagnetic actuators mounted on said auxiliary board for actuating said reed switches, means for mounting said auxiliary board in fixed spaced relation to said deck of cards, each of said actuators having a magnetic core of H-shaped longitudinal section and an energizing coil carried by the central bar portion of said core, the outer legs of each core defining two magnetic airgaps, one of said gaps being positioned along one of said reed switches and the other of said gaps lying on the opposite side of the central bar portion of the core from said one gap, and an auxiliary reed switch mounted on said auxiliary board in said other one of said gaps.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |