US3662223A - Pre-amplifier plug for musical instruments with battery retaining and switch activating rod means - Google Patents
Pre-amplifier plug for musical instruments with battery retaining and switch activating rod means Download PDFInfo
- Publication number
- US3662223A US3662223A US159434A US3662223DA US3662223A US 3662223 A US3662223 A US 3662223A US 159434 A US159434 A US 159434A US 3662223D A US3662223D A US 3662223DA US 3662223 A US3662223 A US 3662223A
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- Prior art keywords
- casing
- plug
- circuit
- amplifier
- carried
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- Expired - Lifetime
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- 230000003213 activating effect Effects 0.000 title description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 abstract description 3
- 101100264195 Caenorhabditis elegans app-1 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/32—Constructional details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
Definitions
- This invention relates to electronic amplifiers and more particularly to a plug for musical instruments having self-con tained pre-amplifier means for adaptation to musical instruments.
- Another object of this invention is to provide a device of the type described which will be adaptable to both musical instruments and microphones.
- Still another object of this invention is to provide a device of the type described which will have self-contained battery means for powering the solid state circuitry thereof.
- a further object of this invention is to provide a plug of the type described which may be used with any electronically amplified musical instrument such as a guitar, and will serve to greatly improve the amplified sound and in the case of the guitar, will require less pressure to be applied in picking the strings of the guitar.
- Yet another object of this invention is to provide a plug of the type described which will provide a means of operating the main amplifier at a much reduced volume and will also serve to improve the sound obtained from inexpensive amplifiers, thus making them produce sound, much like the larger and more expensive equipment.
- An even further object of this invention is to provide a plug of the type described which will have all the components coated with a suitable material so as to provide electrical insulation and protection from mechanical shock.
- FIG. I is a top plan view of the present invention.
- FIG. 2 is a side view of FIG. 1 shown in elevation
- FIG. 3 is an end view of FIG. 2;
- FIG. 4 is a schemmatic wiring diagram of the invention.
- a plug is shown to include a self-contained solid state circuit 11 which is connected electrically to an extending male prong 12 of casing 13. Prong 12 is held to casing 13 by means of screw fasteners 14. Extending from one end of casing 13 is a switch and battery retaining rod 15 and a battery retaining rod 16.
- Rods 15 and 16 provide a means of retaining the batteries 18.
- a pair of snap wires 19 serve to engage and hold rods 15 and 16 in position within casing 13 of plug 10.
- a cable 20 connected to circuit ll of plug 10, provides a means of connecting plug 10 to the amplifier.
- Circuit 11 includes a transistor 21 having its emitter 22, its collector 23 and its base 24 coupled with resistors 25, 26, and 27.
- the circuit 11 also includes capacitors 28 and a switch 29 which is closed by means of rod 15 when it is pulled outwards of casing 13 to the first notch thereof.
- the original cord connecting the musical instrument with its amplifier is removed and the coil cable 20 is used in its place to connect the musical instrument to the amplifier and when switch 29 is closed, the pre-amplifier circuit ll serves to pre-amplify the signal produced at the musical instrument prior to its being placed on the input of the amplifier.
- a pre-amplifier plug for musical instruments comprising a casing, a male plug carried by said casing for connecting the musical instrument to an amplifier, a transistorized circuit for pre-amplification, carried within said casing, cable means carried by said plug for connecting said plug to the musical instrument and the pre-amplifier circuit, battery means carried by said lug providing self-contained power means for said preamp Ifier circuit, a pair of battery retaining rods, carrie by said casing, one of which serves as switch means for said circuit, spring contact means carried within said casing providing connection means with the transistorized circuit.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Power Engineering (AREA)
- Electrophonic Musical Instruments (AREA)
- Amplifiers (AREA)
Abstract
A plug with a self-contained solid state preamplifier primarily for musical instruments. This device includes resisters, capacitors and battery means, coupled to pre-amplify input signals to conventional amplifiers.
Description
United States Patent Marshall 1 May 9,1972
[54] PRE-AMPLIFIER PLUG FOR MUSICAL INSTRUMENTS WITH BATTERY RETAINING AND SWITCH ACTIVATING ROD MEANS [72] Inventor: Walter L. Marshall, PO. Box 105, West Burlington, Iowa 52655 221 I Filed: July 2, 1971 21 App1.No.: 159,434
[52] US. Cl. ..3l7/99, 317/101 R, 325/352, 330/12, 330/51, 330/65, 339/147 R [51] Int. Cl. ..l'102b 1/10, H03f H00 [58] Field ofSearch 179/1 PC; 317/99, 1 12, 120, 317/10] R; 325/119, 352, 492; 330/12, 51, 65;
[56] I References Cited UNITED STATES PATENTS 3,070,748 12/1962 Worobey ..3 1 7/ 101 R 2,497,336 2/1950 Young ..330/65 3,273,479 8/1966 .lokob ..339/147 R Primary Examiner-Lewis H. Myers Assistant Eraminer-Gerald P. Tolin 57] ABSTRACT A plug with a self-contained solid state preamplifier primarily for musical instruments. This device includes resisters, capacitors and battery means, coupled to pre-amplify input signals to conventional amplifiers.
3 Claims, 4 Drawing Figures PATENTEDMAY 9 1912 1 3.662.223
'm vew 7-02 a/Az 7'5? 4 MIBSA il PRE-AMPLIFIER PLUG FOR MUSICAL INSTRUMENTS WITH BATTERY RETAINING AND SWITCH ACTIVATING ROD MEANS .This invention relates to electronic amplifiers and more particularly to a plug for musical instruments having self-con tained pre-amplifier means for adaptation to musical instruments.
It is therefore the primary purpose of this invention to provide a plug for musical instruments which will have a self-contained and transistorized pre-amplifier.
Another object of this invention is to provide a device of the type described which will be adaptable to both musical instruments and microphones.
Still another object of this invention is to provide a device of the type described which will have self-contained battery means for powering the solid state circuitry thereof.
A further object of this invention is to provide a plug of the type described which may be used with any electronically amplified musical instrument such as a guitar, and will serve to greatly improve the amplified sound and in the case of the guitar, will require less pressure to be applied in picking the strings of the guitar.
Yet another object of this invention is to provide a plug of the type described which will provide a means of operating the main amplifier at a much reduced volume and will also serve to improve the sound obtained from inexpensive amplifiers, thus making them produce sound, much like the larger and more expensive equipment.
An even further object of this invention is to provide a plug of the type described which will have all the components coated with a suitable material so as to provide electrical insulation and protection from mechanical shock.
Other objects of the present invention are to provide a preamplifier plug for musical instruments which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and efficient in operation.
These and other objects will become readily evident upon a study of the following specification together with the accompanying drawing wherein:
FIG. I is a top plan view of the present invention;
FIG. 2 is a side view of FIG. 1 shown in elevation;
FIG. 3 is an end view of FIG. 2; and
FIG. 4 is a schemmatic wiring diagram of the invention.
According to this invention, a plug is shown to include a self-contained solid state circuit 11 which is connected electrically to an extending male prong 12 of casing 13. Prong 12 is held to casing 13 by means of screw fasteners 14. Extending from one end of casing 13 is a switch and battery retaining rod 15 and a battery retaining rod 16.
Included within casing 13 are spring contacts 17. Rods 15 and 16 provide a means of retaining the batteries 18. A pair of snap wires 19 serve to engage and hold rods 15 and 16 in position within casing 13 of plug 10. A cable 20 connected to circuit ll of plug 10, provides a means of connecting plug 10 to the amplifier.
Circuit 11 includes a transistor 21 having its emitter 22, its collector 23 and its base 24 coupled with resistors 25, 26, and 27. The circuit 11 also includes capacitors 28 and a switch 29 which is closed by means of rod 15 when it is pulled outwards of casing 13 to the first notch thereof.
In use, the original cord connecting the musical instrument with its amplifier is removed and the coil cable 20 is used in its place to connect the musical instrument to the amplifier and when switch 29 is closed, the pre-amplifier circuit ll serves to pre-amplify the signal produced at the musical instrument prior to its being placed on the input of the amplifier.
What I now claim is:
l. A pre-amplifier plug for musical instruments, comprising a casing, a male plug carried by said casing for connecting the musical instrument to an amplifier, a transistorized circuit for pre-amplification, carried within said casing, cable means carried by said plug for connecting said plug to the musical instrument and the pre-amplifier circuit, battery means carried by said lug providing self-contained power means for said preamp Ifier circuit, a pair of battery retaining rods, carrie by said casing, one of which serves as switch means for said circuit, spring contact means carried within said casing providing connection means with the transistorized circuit.
2. The combination according to claim 1, wherein said rods within said casing, snappably engage with snap wires for retaining said battery within said casing and said spring contact means within said casing serve as electrical connection means for said circuit.
3. The combination according to claim 2, wherein one of said rods is provided with a pair of notches, so that when said rod is pulled outwards the second or end notch will engage with this associated snap wire and will close said switch of said circuit, thus energizing said transistorized pre-amplifier circuit within said plug.
I III I! l 1'! II
Claims (3)
1. A pre-amplifier plug for musical instruments, comprising a casing, a male plug carried by said casing for connecting the musical instrument to an amplifier, a transistorized circuit for pre-amplification, carried within said casing, cable means carried by said plug for connecting said plug to the musical instrument and the pre-amplifier circuit, battery means carried by said plug providing self-contained power means for said preamplifier circuit, a pair of battery retaining rods, carried by said casing, one of which serves as switch means for said circuit, spring contact means carried within said casing providing connection means with the transistorized circuit.
2. The combination according to claim 1, wherein said rods within said casing, snappably engage with snap wires for retaining said battery within said casing and said spring contact means within said casing serve as electrical connection means for said circuit.
3. The combination according to claim 2, wherein one of said rods is provided with a pair of notches, so that when said rod is pulled outwards the second or end notch will engage with this associated snap wire and will close said switch of said circuit, thus energizing said transistorized pre-amplifier circuit within said plug.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15943471A | 1971-07-02 | 1971-07-02 |
Publications (1)
Publication Number | Publication Date |
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US3662223A true US3662223A (en) | 1972-05-09 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US159434A Expired - Lifetime US3662223A (en) | 1971-07-02 | 1971-07-02 | Pre-amplifier plug for musical instruments with battery retaining and switch activating rod means |
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US (1) | US3662223A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4214214A (en) * | 1978-08-03 | 1980-07-22 | Merriman George W | Connecting cable |
US4220381A (en) * | 1978-04-07 | 1980-09-02 | Shell Oil Company | Drill pipe telemetering system with electrodes exposed to mud |
US4532847A (en) * | 1983-09-06 | 1985-08-06 | Youngblood Paul E | Control accessory for an acoustical guitar |
EP0366442A2 (en) * | 1988-10-27 | 1990-05-02 | Airjack Wireless Systems Incorporated | Cordless R.F. transmitter |
US4995293A (en) * | 1987-06-19 | 1991-02-26 | Anderson Peter N | Acoustic instrument with internally positioned microphone means for receiving acoustical vibrations |
US5932827A (en) * | 1995-01-09 | 1999-08-03 | Osborne; Gary T. | Sustainer for a musical instrument |
EP1119231A2 (en) * | 2000-01-18 | 2001-07-25 | Rohde & Schwarz GmbH & Co. KG | High frequency power amplifier |
US20050218880A1 (en) * | 2004-04-01 | 2005-10-06 | Simona Ioffe | Apparatus for powering an electronic musical instrument |
US20080078278A1 (en) * | 2006-09-20 | 2008-04-03 | Malmark, Inc. | Bell ensemble |
US7476798B1 (en) * | 2007-07-10 | 2009-01-13 | Carter Duncan Corp. | Combined jack and coaxial battery-access cover for a stringed musical instrument |
US20210319776A1 (en) * | 2020-03-21 | 2021-10-14 | Robert John Williams | Device, system, and methods for batteries replacement in electrical instruments |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2497336A (en) * | 1946-10-31 | 1950-02-14 | Dictograph Products Co Inc | Casing for unitary hearing aids |
US3070748A (en) * | 1961-04-14 | 1962-12-25 | Motorola Inc | Portable radio receiver having inter-changeable means for using single-use and rechargeable batteries |
US3273479A (en) * | 1963-04-11 | 1966-09-20 | Agfa Ag | Cameras with built-in flash assemblies |
-
1971
- 1971-07-02 US US159434A patent/US3662223A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2497336A (en) * | 1946-10-31 | 1950-02-14 | Dictograph Products Co Inc | Casing for unitary hearing aids |
US3070748A (en) * | 1961-04-14 | 1962-12-25 | Motorola Inc | Portable radio receiver having inter-changeable means for using single-use and rechargeable batteries |
US3273479A (en) * | 1963-04-11 | 1966-09-20 | Agfa Ag | Cameras with built-in flash assemblies |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4220381A (en) * | 1978-04-07 | 1980-09-02 | Shell Oil Company | Drill pipe telemetering system with electrodes exposed to mud |
US4214214A (en) * | 1978-08-03 | 1980-07-22 | Merriman George W | Connecting cable |
US4532847A (en) * | 1983-09-06 | 1985-08-06 | Youngblood Paul E | Control accessory for an acoustical guitar |
US4995293A (en) * | 1987-06-19 | 1991-02-26 | Anderson Peter N | Acoustic instrument with internally positioned microphone means for receiving acoustical vibrations |
EP0366442A2 (en) * | 1988-10-27 | 1990-05-02 | Airjack Wireless Systems Incorporated | Cordless R.F. transmitter |
EP0366442A3 (en) * | 1988-10-27 | 1990-08-16 | Airjack Wireless Systems Incorporated | Cordless r.f. transmitter |
US5932827A (en) * | 1995-01-09 | 1999-08-03 | Osborne; Gary T. | Sustainer for a musical instrument |
EP1119231A2 (en) * | 2000-01-18 | 2001-07-25 | Rohde & Schwarz GmbH & Co. KG | High frequency power amplifier |
EP1119231A3 (en) * | 2000-01-18 | 2003-10-01 | Rohde & Schwarz GmbH & Co. KG | High frequency power amplifier |
US20050218880A1 (en) * | 2004-04-01 | 2005-10-06 | Simona Ioffe | Apparatus for powering an electronic musical instrument |
US7351905B2 (en) * | 2004-04-01 | 2008-04-01 | Simona Ioffe | Apparatus for powering an electronic musical instrument |
US20080078278A1 (en) * | 2006-09-20 | 2008-04-03 | Malmark, Inc. | Bell ensemble |
US7476798B1 (en) * | 2007-07-10 | 2009-01-13 | Carter Duncan Corp. | Combined jack and coaxial battery-access cover for a stringed musical instrument |
US20210319776A1 (en) * | 2020-03-21 | 2021-10-14 | Robert John Williams | Device, system, and methods for batteries replacement in electrical instruments |
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