Patent US3916751A successfully refreshed from Google Patents.
US3916751A
Expired / Lapsed
US
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Electrical pickup for a stringed musical instrument
Assignee: NORLIN MUSIC Inc
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Filing: 1975-01-09
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Granted: 1975-11-04
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Expires: 1995-01-09
Abstract
Abstract An electrical pickup for a stringed musical instrument, such as a guitar, comprises a pair of axially spaced coils, a ferromagnetic pole piece spanning the space between the coils and extending into each coil and having a portion between the coils which extends toward a string, magnet means having a pole face directed toward the pole piece and directing a magnetic field into the pole piece of a single magnetic polarity, the magnet means preferably comprising two permanent magnets disposed at opposite sides of the coils and directing magnetic fields into the pole piece from opposite sides thereof of the same magnetic polarity.
Inventors
- 👤 Willi Lorenz Stich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:09
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/181; G10D; G10D1/00; G10D1/04; G10D1/05; G10D1/08; G10D1/085; G10H2220/00; G10H2220/461; G10H2220/505; G10H2220/511
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
An electrical pickup for a stringed musical instrument, comprising: a. a pair of axially spaced coils arranged to have their axes extend along the length of an instrument string; b. a ferromagnetic pole piece spanning the space between said coils and extending into each of said coils, said pole piece having a portion between said coils extending toward the string; and c. permanent magnet means having a pole face directed toward said pole piece, and directing a magnetic field into said pole piece of a single magnetic polarity.
Claim 2
Dependent Claim
88 words
An electrical pickup for a stringed musical instrument, comprising: a. a pair of axially spaced coils arranged to have their axes extend along the length of an instrument string; b. a ferromagnetic pole piece spanning the space between said coils and extending into each of said coils, said pole piece having a portion between said coils extending toward the string; and c. permanent magnet means having a pole face directed toward said pole piece, and directing a magnetic field into said pole piece of a single magnetic polarity.
Claim 3
Dependent Claim
40 words
A pickup according to claim 1 in which said permanent magnet means comprises two permanent magnets disposed at opposite sides of said coils and directing magnetic fields into said pole piece from opposite sides thereof of the same magnetic polarity.
Claim 4
Dependent Claim
37 words
A pickup according to claim 1 in which said permanent magnet means has two pole faces of opposite polarity, said means being oriented so that only a neutral side between the poles is facing an instrument string.
Claim 5
Dependent Claim
20 words
A pickup according to claim 1 in which said coils are connected in series in out-of-phase relation to each other.
Claim 6
Dependent Claim
36 words
A pickup according to claim 1, in which said coils, said magnets, and said pole piece are elongated in a direction transverse to string length so as to be responsive to a plurality of parallel strings.
Claim 7
Dependent Claim
25 words
A pickup according to claim 1 in which said pole piece has oppositely facing shoulders engaging said coils and thus defining the axial spacing therebetween.
Claim 8
Dependent Claim
29 words
A pickup according to claim 1 in which said portion extending toward the string comprises an adjustable screw disposed to be accessible for adjustMent when assembled on the instrument.
Claim 9
Dependent Claim
38 words
A pickup according to claim 5 which includes a partially hollow mounting base receiving said coils, said magnets and said pole piece, said base having an external configuration of uniform cross section and a cover closing said base.
Claim 10
Dependent Claim
95 words
An electrical pickup for a stringed musical instrument comprising: a. a pair of axially spaced coils arranged to have their axes extend along the length of an instrument string; said coils being connected in series out of phase relation with each other; b. a common pole piece for said coils, said pole piece being shaped to an adjacent each string of said instrument at only a simple point which point is between said coils; and c. means for providing a magnetic field of a single magnetic polarity which is substantially uniform through said pole piece.
Claim 11
Dependent Claim
95 words
An electrical pickup for a stringed musical instrument comprising: a. a pair of axially spaced coils arranged to have their axes extend along the length of an instrument string; said coils being connected in series out of phase relation with each other; b. a common pole piece for said coils, said pole piece being shaped to an adjacent each string of said instrument at only a simple point which point is between said coils; and c. means for providing a magnetic field of a single magnetic polarity which is substantially uniform through said pole piece.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |