US3915048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric guitar circuit
Assignee: NORLIN MUSIC Inc
•
Filing: 1974-08-05
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Granted: 1975-10-28
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Expires: 1994-08-05
Abstract
Abstract An electric guitar circuit includes two hum-bucking pickups connected to a selector switch by which various combinations of connections and phasings may be used to select the type of sound desired. In addition, the selected signal is further subject to a volume control, a high-frequency tone control, and a mid-range frequency tone control, the circuit being physically embodied in the guitar. By way of example, in one position of the selector switch, the two pickups are connected in series with each other. The mid-range frequency tone control is used to suppress the harshness found in that frequency range in transistorized audio amplifiers.
Inventors
- 👤 Willi Lorenz Stich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:51
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
83 words
A circuit for an electric guitar, comprising: a. pickup structure having an output line for being connected to the input of an audio amplifier; and b. a mid-range frequency tone control circuit connected between the output line of said pickup structure and a reference potential, said tone control circuit suppressing neither the highest nor the lowest audio frequency signals of said output line, said mid-range tone control circuit comprising a variable resistor, a capacitor, and an inductor connected in series with each other.
Claim 2
Dependent Claim
83 words
A circuit for an electric guitar, comprising: a. pickup structure having an output line for being connected to the input of an audio amplifier; and b. a mid-range frequency tone control circuit connected between the output line of said pickup structure and a reference potential, said tone control circuit suppressing neither the highest nor the lowest audio frequency signals of said output line, said mid-range tone control circuit comprising a variable resistor, a capacitor, and an inductor connected in series with each other.
Claim 3
Dependent Claim
40 words
A circuit according to claim 1 including an adjustable volume control having an input and an output connected in series in said output line, and a high-frequency bypass capacitor connected between the input and the output of said volume control.
Claim 4
Dependent Claim
22 words
A circuit according to claim 1 in which said inductor has two coils connected in series in out-of-phase relation to each other.
Claim 5
Dependent Claim
58 words
A circuit according to claim 1 in which said pickup structure comprises a first pickup having a pair of coils connected in series in out-of-phase relation to each other, and a second pickup having a pair of coils connected in series in out-of-phase relation to each other; and a selector switch arranged to connect said pickups in series.
Claim 6
Dependent Claim
65 words
An electric guitar circuit, comprising: a. a first pickup having a pair of coils connected in series in out-of-phase relation to each other; b. a second pickup having a pair of coils connected in series in out-of-phase relation to each other; and c. a selector switch having contacts for connecting said pickups in series with each other and to the input of an audio amplifier.
Claim 7
Dependent Claim
65 words
An electric guitar circuit, comprising: a. a first pickup having a pair of coils connected in series in out-of-phase relation to each other; b. a second pickup having a pair of coils connected in series in out-of-phase relation to each other; and c. a selector switch having contacts for connecting said pickups in series with each other and to the input of an audio amplifier.
Claim 8
Dependent Claim
19 words
A circuit according to claim 5 in which said contacts connect said pickups in out-of-phase relation to Each other.
Claim 9
Dependent Claim
19 words
A circuit according to claim 5 in which said contacts connect said pickups in in-phase relation to each other.
Claim 10
Dependent Claim
19 words
A circuit according to claim 5 in which said contacts are arranged alternatively to connect said pickups in parallel.
Claim 11
Dependent Claim
24 words
A circuit according to claim 8 in which the parallel connection made by said contacts connects said pickups in in-phase relation to each other.
Claim 12
Dependent Claim
24 words
A circuit according to claim 8 in which the parallel connection made by said contacts connects said pickups in out-of-phase relation to each other.
Claim 13
Dependent Claim
24 words
A circuit according to claim 10 including a capacitor connected in series with one of said pickups to limit the output of out-of-phase signal.
Claim 14
Dependent Claim
21 words
A circuit according to claim 5 in which said contacts are arranged alternatively to connect said pickups to the amplifier individually.
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |