US3633145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple switch for electronic musical instruments
Assignee: Nippon Gakki Co Ltd
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Filing: 1969-06-30
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Granted: 1972-01-04
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Expires: 1989-06-30
Abstract
Abstract A multiple switch for an electronic musical instrument comprising a multipolar magnet which has a plurality of magnetic poles arranged alternately opposite to each other, and plural pieces of magnetosensitive elements whose electric resistance varies according to the direction and the intensity of applied magnetic field, wherein each of said magnetosensitive elements is arranged between a pair of said magnetic poles of said multipolar magnet and connected in the switching circuit of the electronic musical instrument, and the relative positions of said magnetic poles and said magnetosensitive elements are caused to change by one step under the action of the corresponding key, so that the electrical resistance of the magnetosensitive elements is varied and switching on-off actions are attained.
Inventors
- 👤 Junji Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:50
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/97; G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/053; G10H1/055; G10H1/0555
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A multiple switch for an electronic musical instrument comprising a key, a magnet holder actuated by said key, a multipolar magnet composed of plural pieces of north and south magnetic poles arranged in alternately opposite polarities, said magnet being fixed to said magnet holder, and magnetosensitive elements arranged between each pair of said plural pieces of north and south magnetic poles and connected in the switching circuit of the electronic musical instrument as switch elements, the electric resistance of said magnetosensitive elements being varied in accordance with the direction and intensity of the magnetic field applied thereto, whereby the relative position of said magnetic poles and said magnetosensitive elements are caused to change by one step under the action of the key and the electric resistance of said magnetosensitive elements is varied.
Claim 2
Dependent Claim
132 words
A multiple switch for an electronic musical instrument comprising a key, a magnet holder actuated by said key, a multipolar magnet composed of plural pieces of north and south magnetic poles arranged in alternately opposite polarities, said magnet being fixed to said magnet holder, and magnetosensitive elements arranged between each pair of said plural pieces of north and south magnetic poles and connected in the switching circuit of the electronic musical instrument as switch elements, the electric resistance of said magnetosensitive elements being varied in accordance with the direction and intensity of the magnetic field applied thereto, whereby the relative position of said magnetic poles and said magnetosensitive elements are caused to change by one step under the action of the key and the electric resistance of said magnetosensitive elements is varied.
Claim 3
Dependent Claim
25 words
A multiple switch for an electronic musical instrument according to claim 1, wherein said plural pieces of north and south magnetic poles are arranged vertically.
Claim 4
Dependent Claim
28 words
A multiple switch for an electronic musical instrument according to claim 1, wherein said north and south magnetic poles are arranged in horizontally spaced relationship to each other.
Claim 5
Dependent Claim
30 words
A multiple switch for an electronic musical instrument according to claim 1, wherein said plural pieces of north and south magnetic poles are arranged circularly around a disk-shaped magnet holder.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |