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 Title: |
US4211893:
Dual mode music instrument amplifier
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Smith, Randall C.; Lagunitas, CA
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| Assignee: |
Mesa Engineering, Inc., Lagunitas, CA
other patents from MESA ENGINEERING, INC. (368355) (approx. 1)
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| Published / Filed: |
1980-07-08
/ 1978-11-13
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| Application Number: |
US1978000959705
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| IPC Code: |
Advanced:
G10H 1/16;
G10H 1/46;
H03F 1/32;
H03F 5/00;
H03G 5/02;
Core:
G10H 1/06;
H03G 5/00;
more...
IPC-7:
G10H 1/06;
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| ECLA Code: |
G10H1/16; G10H1/46; H03F1/32P8T; H03F5/00;
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| U.S. Class: |
Current:
381/118;
330/149;
381/120;
984/329;
984/354;
Original:
179/001.A;
084/001.16;
330/149;
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| Field of Search: |
330/149
084/1.11,1.16,1.19
179/1 A,1 M
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| Priority Number: |
| 1978-11-13 |
US1978000959705 |
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| Abstract: |
An electronic amplifying apparatus intended for electric music instruments (primarily guitar), with switchable circuitry offering an improved, specialized circuit for the enhancement of solo playing in addition to customary simple amplification. In the lead (or solo) mode of operation, the circuit will synthesize particular sustain and distortion characteristics and add them to the tone of the instrument (guitar, electric piano, microphone, etc.) to produce a more flexible and expressive sound for solo playing than the sound of the instrument normally amplified. Switching and control circuitry enable the musician to return to a conventional amplified tone which would be preferred for rhythm (or chordal) playing.
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| Attorney, Agent or Firm: |
Cantor, Jay M. ;
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| Primary / Asst. Examiners: |
Moffitt, James W.; Myers, Randall P.
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
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First Claim:
Show all 12 claims |
What is claimed is:
1. An electronic amplifier for audio frequency electrical signals generated by a musical instrument such as a guitar including a plurality of preamplifier stages operating in substantially the linear mode and providing a high amplitude signal output from the final pre-amplifier stage,
- a further amplifier stage comprising an electron discharge device having an anode, a cathode and a control electrode,
- a first adjustable attenuation network,
- a second adjustable attenuation network,
- a pre-amplifier signal output terminal,
- switch means for selectively coupling the output of the final pre-amplifier stage to the pre-amplifier signal output terminal through the first network to provide a signal having a preset amplitude to said terminal or coupling the final pre-amplifier stage to the control electrode to drive it into its non-linear saturated operating mode to provide a distorted signal at its anode electrode,
- and said switch means including means operating to couple the output from said anode electrode to the pre-amplifier signal output terminal through said second network concurrently with the coupling of the control electrode to the output of said final pre-amplifier stage.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 20 U.S. patent(s) that reference this one
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