US3668321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic coupler
Assignee: Individual
•
Filing: 1970-08-11
•
Granted: 1972-06-06
•
Expires: 1990-08-11
Abstract
Abstract An easily attachable and detachable coupling for electrical systems, such as earphones to audio amplifiers, comprising a coil on a magnetically soft ferromagnetic body and a second coil mounted on a permanent magnet. The first coil can be connected to an audio signal and the second coil connected to a pair of earphones.
Inventors
- 👤 Henry C Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:49
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/14; H01F2038/143; Y; Y10; Y10S; Y10S336/00; Y10S336/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
An easily attachable and detachable coupling for electrical systems comprising: a. a coil (15) mounted adjacent a magnetically soft ferromagnetic body (17) and adapted to be connected across the output of an alternating current source (11); and b. a second coil (20) mounted adjacent a permanently magnetized body (21) and adapted to be connected across the input of a transducer (18); positioning of the second coil (20) adjacent the first coil (15) providing inductive electrical coupling as well as magnetic attachment.
Claim 2
Dependent Claim
81 words
An easily attachable and detachable coupling for electrical systems comprising: a. a coil (15) mounted adjacent a magnetically soft ferromagnetic body (17) and adapted to be connected across the output of an alternating current source (11); and b. a second coil (20) mounted adjacent a permanently magnetized body (21) and adapted to be connected across the input of a transducer (18); positioning of the second coil (20) adjacent the first coil (15) providing inductive electrical coupling as well as magnetic attachment.
Claim 3
Dependent Claim
27 words
The coupling of claim 1 wherein the alternating current source is a source of signal of audio frequency and the transducer transforms the audio signal into sound.
Claim 4
Dependent Claim
21 words
The coupling of claim 1 wherein the magnetically soft ferromagnetic body is a core on which the first coil is wound.
Claim 5
Dependent Claim
21 words
The coupling of claim 1 wherein the magnetically soft ferromagnetic body comprises a plate covering the end of the first coil.
Claim 6
Dependent Claim
20 words
The coupling of claim 1 wherein the permanently magnetized body is a core on which the second coil is wound.
Claim 7
Dependent Claim
16 words
The coupling of claim 1 wherein a plurality of second coils are positioned on first coil.
References Cited (Backward Citations)
US2379664A
Cited
US3418552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |