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CA1296555C - Stringed musical instrument with a ceramic body - Google Patents

Stringed musical instrument with a ceramic body

Info

Publication number
CA1296555C
CA1296555C CA000588653A CA588653A CA1296555C CA 1296555 C CA1296555 C CA 1296555C CA 000588653 A CA000588653 A CA 000588653A CA 588653 A CA588653 A CA 588653A CA 1296555 C CA1296555 C CA 1296555C
Authority
CA
Canada
Prior art keywords
clay
musical instrument
guitar
strings
solid body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CA000588653A
Other languages
French (fr)
Inventor
Robin B. Thacker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA000588653A priority Critical patent/CA1296555C/en
Application granted granted Critical
Publication of CA1296555C publication Critical patent/CA1296555C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10DSTRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/22Material for manufacturing stringed musical instruments; Treatment of the material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stringed Musical Instruments (AREA)

Abstract

ABSTRACT

A stringed musical instrument, such as an electric guitar, having a solid body made of clay-based material. The body is made by shaping a greenware from a clay-based material, and firing the greenware to cause it to permanently harden. The body is then glazed to obtain a smooth, non-porous finish.

Description

~-- 12965S5 The invention relates to the art of manufacturing musical instruments and, more particularly, to a stringed musical instrument having a solid body made of clay-based material.

Solid body stringed musical instruments such as electric guitars, among others, are conventionally manufactured by sculpting a body from suitable wooden material, to which are subsequently mounted a neck, electronic hardware and strings. The process is completed by subjecting the guitar to conventional finishing steps such as painting and polishing for the purpose of improving the aesthetical appearance of the instrument.

The above manufacturing technique has numerous drawbacks. For example, it is very difficult to obtain, into a single production run, two guitars that have identical sound charasteristics because the grain orientation of the wood is different from one guitar body to another, thus resulting in instruments that resonate slightly differently. In addition, the wood sculpting operation for making the body of the instrument is an expensive and a time-consuming step.

An object of the present invention is a solid body stringed musical instrument with improved sound characteristics.

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S The above object may be achieved by using ceramic material for the construction of the instrument body instead of other commonly used materials. The ceramic material improves the tonal quality of the sound, improves the resonating quality of the sound and also improves the sustained duration of the particular stringed instrument. This is mainly due to the high density of ceramics over wood.

The shaping and forming of such a ceramic lS body is much more easily and inexpensively done than conventional wood sculpting methods. Ceramics may be molded, pressed, shaped, etc., inexpensively, and repeated near perfect bodies can be fabricated by the use of molds. Furthermore, due to the better homogeneity of ceramics over wood, musical instruments with almost identical sound characteristics may be easily mass produced.

In addition to the above, a ceramic body 2S may be provided with a durable and aesthetic glazed surface which is longer lasting than paints and varnishes employed with conventional wooden bodies.

The guitar body may be manufactured by pouring into a shaping mold, clay slip. The clay slip remains in the mold for a predetermined time to sufficiently dry allowing the clay body to be handled.
When this preliminary drying period is completed, the mold is opened and the greenware (unfired clay) is 3S removed and trimmed down if necessary. The greenware piece is then provided with recesses at predetermined locations, used for receiving fasteners to attach the other components of the guitar to the body. When this operation is completed, the greenware is fired into a kiln so that the clay permanently crystallizes. If desired, the fired guitar body is then coated with glazing material and fired again to obtain a hard, non-porous shiny finish. The manufacturing process is completed by mounting to the finished body, the remaining components of the guitar, namely the neck, the electronic hardware, the strings, etc. More specifically, this is achieved by inserting into the fastener receiving recesses of the body, dowel pins of wood or plastic material intended for receiving screws or similar fasteners.

In broad terms, the present invention may therefore be defined as a stringed musical instrument comprising:
a solid resonating body made of dense and homogeneous ceramic material obtained from a clay-based fluid slip;
an elongated neck assembly mounted to thissolid body:
strings mounted to the neck assembly and extending therealong; and pick-up means mounted to the solid body for sensing oscillation of the strings and for generating an output signal upon oscillation of at least one of these strings.

Herein, the term "solid body" is intended to exclude thin walled hollow bodies, typically used in the construction of acoustic guitars, violins, cellos or the like, in which the thin walled hollow 12g6555 body is used for sound amplifying purposes. On the contrary, thick walled solid bodies exhibit little or no sound amplification characteristics, this task being performed by electronic pick-ups and amplifiers.

Herein, the term "clay" is intended to encompass natural compositions as well as synthetic~lly done blends.

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~ ` 129~S55 A preferred embodiment of the invention will now be described with relation to the annexed drawings, in which:

- Figure 1 is an elevational view of a solid body electric guitar, in accordance with the present invention;

- Figure 2 is a side view of the guitar shown in Figure l;

- Figures 2a and 2b are perspective views of the left and the right mold halves respectively, for shaping a guitar body;
- Figure 3 is a side view of the shaping mold in closed position;

- Figure 4 is a schematical view illustrating the mold as being filled with clay slip;

- Figure 5 is an elevational view of the clay body in a semi-dried state removed from the mold; and - Figure 6 is a perspective view of the clay body as being fired into a kiln.

129~;5~

Referring now to the annexed drawings, the reference numeral 10 designa.es in general, an electric guitar constructed in accordance with the present invention. The guitar 10 comprises a ceramic body 12 carrying a conventional neck assembly 14 attached at one end to the body 12, and being provided at the opposite end with tuning pegs 16 as it is customary in the art. The body 12 is provided with a centrally located hollow region 18, best illustrated in Figure 2, for housing the electronic hardware of the guitar such as pick-ups 20 to generate an electronic signal upon oscillation of strings, and volume and tone control potentiometers (not shown in the drawings).

The hollow region 18 is closed by a pick-guard, typically made of plastic material and secured to the body 12 by means of small screws 22. Through the pick-guard extend the pick-ups 20 and control knobs 24 for the volume and tone control potentiometers.
Also, the pick-guard 19 serves as a support for a jack assembly 26 used for connecting the guitar to an amplifier.

A tremolo bridge assembly 28 is mounted to the body 12 and together, in conjonction with the tuning pegs 16, constitute a support for the guitar strings 30.

~ l~g6~

The neck assembly 14 and the tremolo assembly 28 are mounted to the guitar body 12 by means of screw type fasteners. More particularly, referring to Figure 2, the body 12 is provided with two openings 31, extending completely through the body 12, for receiving long wood screws 33 with threaded ends engaged in the neck of the guitar. The tremolo bridge assembly 28 is also mounted with wood screws to the body 12, i.ndicated at 35 in Figure 1, engaging dowel pins (not shown) received into specially provided recesses in the ceramic material of the body 12.

The guitar 10 also comprises two conventional strap clips 32. The clips 32 are secured to the guitar body 12 in much the same way as the tremolo bridge assembly 28, namely by wood screws engaging dowel pins (not shown).

The process for manufacturing the guitar 12 comprises generally the steps of shaping the body from a clay based material and firing the body so that it hardens and assumes a permanent form. Then, if desired, the body may be glazed to obtain the desired finish.

The following is a non-exhaustive list of well known techniques for shaping clay based material:

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, ~ .

a) dust press b) stiff mud c) hot pressing d) soft mud molding 5 e) hand building f) slip casting g) pressure casting h) vacuum casting i) hygroscopic casting 10 j) hygroscopic pressing.

Among the existing clay shaping techniques, the slip casting method is preferred because it is the least expensive. This process consists of providing a porous shaping mold, of the type illustrated in Figures 2 and 3, and designated by the reference numeral 40.
The mold 40, which may be made of metal or plaster, comprises two halves 42 and 44 respectively, that mate to form an internal cavity having a shape corresponding to the shape of the body 12. To insure proper alignment of the mold halves when they are closed, the mold half 44 is provided with alignment keys 46 that fit into respective openings 48 on the mold half 42.

When the mold 40 is closed, as shown in Figure 3, an opening 50 communicating with the internal cavity of the mold is defined, allowing to fill the - - ` lZ96S~5 internal cavity with slip which basically is clay in fluid state obtained by diluting the clay with water or any other suitable diluting agent.

When the mold 40 is completely filled with clay slip, it remains closed for a certain period of time, so that the clay slip can partially dry thus allowing the shaped clay body to be handled for further processing. The clay in semi-dried state, the so-called greénware, is demolded, the spare 102 is removed and the greenware is allowed to dry thoroughly.
At the end of this second drying period, recesses are provided in the greenware at predetermined locations, which are to receive fasteners used for retaining the other components of the guitar to the body. These recesses may be performed simply by insertion of a tip of a predetermined size, at predetermined locations, in the greenware. Evidently, it may be envisaged to use an automatic machine for providing the recesses at the ~` 20 predetermined locations, which is well suited for a highly automated production. The fastener receiving recesses are schematically shown at 100 in Figure 5.

The greenware is then placed into a kiln to 25 be fired so as to crystallize the clay into a permanently shaped body. Figure 6 schematically illustrates an electric kiln which basically is a ~ 1~9~5S5 fire-proof and a temperature resistant enclosure with electric heating elements with a support for mounting the piece to be fired. The temperature as well as the duration of this thermal treatment depend upon the type of clay used.

It should be appreciated that during the firing operation, the guitar body 12 shrinks by an appreciable amount, therefore, the fastener receiving recesses somehow shift position. For a precise fit of the other components of the guitar, the position of the fastener receiving recesses in the greenware should be calculated to allow for the shrinkage at the firing stage.

If it is desired to locate very precisely the fastener receiving recesses 100 on the body 12, the recesses 100 may be formed after the firing operation with a suitable ceramic drilling machine. However, this method is expected to increase somewhat the manufacturing costs due to the expensive tooling required.

When the firing stage is completed, the guitar body is subjected to a glazing operation which consists of applying on the fired guitar body, a suitable glazing product such as by brushing or spraying and to fire the body again to cure the glazing product.

Glazing products allowing to provide various types of finishes are commercially available. It is within the present art to select the proper glazing product as well as the conditions for applying and curing same on the guitar body.

When the glazing operation is completed, dowel pins (not shown) of wood or plastic material are inserted in the fastener receiving recesses 100 on the guitar body 12. The remaining components of the guitar such as the neck, the tremolo assembly, the electronic lS components, etc., are then assembled by using screws which engage the dowel pins.

The specific formula for the ceramic material used in the construction of the guitar body may vary within wide limits. It is within the present art to select the proper composition in accordance with the desired characteristics such as weight, strength and resonance, among others. In addition, technicalities such as the drying time of the clay, the firing temperature and duration, are well known to those skilled in the art and it is not deemed necessary here to explore the various possibilities.

--" lZ96555 The ceramic material used for the construction of the body 12, may be provided with reinforcing fibers and/or fillers to obtain specific characteristics such as high resistance and a relatively low weight. The type of fibers and/or fillers to be used as well as their specific ratio in the ceramic material are known to those skilled in the art.

The musical instrument body, in accordance with the invention, has numerous advantages over conventional wooden bodies, namely improved sound characteristics, better homogeneity in addition to being inexpensive to manufacture. The use of clay based material for the construction of the body further allows to fine tune the resonance characteristics thereof by properly selecting the composition of the clay.

Since the clay composition can vary widely, a much larger tuning range results, by comparison to wooden bodies, which offer a much more restricted runing freedom.

The above description of a preferred embodiment of this invention should not be considered in any limiting manner since it is given only as an IZ96S~S

example that can be modified and refined in various ways without departing from the spirit of the i.nvention.

Claims (6)

1. A stringed musical instrument comprising:
a solid resonating body made of dense and homogeneous ceramic material obtained from a clay-based fluid slip;
an elongated neck assembly mounted to said solid body;
strings mounted to said neck assembly and extending therealong; and pick-up means mounted to said solid body for sensing oscillation of said strings and for generating an output signal upon oscillation of at least one of said strings.
2. A musical instrument as defined in claim 1, wherein said clay-based slip includes fibres.
3. A musical instrument as defined in claim 1, wherein said clay-based slip comprises a filler.
4. A musical instrument as defined in claim 1, wherein said solid body comprises a plurality of recesses for receiving a fastener holding medium.
5. A musical instrument as defined in claim 4, wherein said fastener holding medium is selected in the group consisting of wood and plastic material.
6. A musical instrument as recited in claim 1, wherein said solid body comprises a hollow region for housing said pick-up means.
CA000588653A 1989-01-19 1989-01-19 Stringed musical instrument with a ceramic body Expired - Lifetime CA1296555C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000588653A CA1296555C (en) 1989-01-19 1989-01-19 Stringed musical instrument with a ceramic body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000588653A CA1296555C (en) 1989-01-19 1989-01-19 Stringed musical instrument with a ceramic body

Publications (1)

Publication Number Publication Date
CA1296555C true CA1296555C (en) 1992-03-03

Family

ID=4139481

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000588653A Expired - Lifetime CA1296555C (en) 1989-01-19 1989-01-19 Stringed musical instrument with a ceramic body

Country Status (1)

Country Link
CA (1) CA1296555C (en)

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