Patent Grant
7189907
The present invention relates to acoustic guitars. More specifically, the present invention is concerned with a neck assembly for an acoustic guitar.
Acoustic guitars are well known. They usually include a hollow body to which a neck is attached. The neck usually defines an angle with respect to the guitar top to allow for a comfortable string action, i.e. the distance between the strings and the neck.
Many neck attachment techniques have been developed in the past.
A traditional neck attachment technique uses a so-called Spanish neck, i.e. a neck that is one piece from the head to the foot inside the body of the guitar. The sides of the guitar are glued into slots cut in the heel of the neck. This type of neck attachment results in a very rigid assembly. However, it is not well suited to contemporary manufacturing since the neck is attached to the body at the beginning of the construction of the instrument, making it too bulky.
Another long standing neck attachment technique consists of making a dovetail assembly between the neck and the body. Traditionally, a dovetail tenon is made in the neck and a corresponding dovetail mortise is made in the body. While this joint is also very strong, it is very difficult to disassemble and the neck angle may be difficult to adjust since there are many mating surfaces.
Guitar makers recently began using mechanical fasteners, such as machine screws and threaded inserts, to attach the neck to the body. Generally, two inserts are installed in the heel of the neck and the machine screws are inserted from the inside of the body to attach the neck. While this neck attachment provides a strong back to forth support of the neck, it has been remarked that the lateral support is less than optimal. Indeed, the mechanical fasteners are aligned with the centerline of the neck and body, giving poor lateral support.
An object of the present invention is therefore to provide an improved neck assembly for an acoustic guitar
More specifically, in accordance with an aspect of the present invention, there is provided a guitar neck assembly to be assembled to a guitar body having a neck receiving block provided with a generally rectangular channel; said guitar neck assembly comprising:
a guitar neck including a head portion, a heel portion and a central portion provided between said head portion and said heel portion; said central portion defining a fretboard receiving surface; said heel portion defining a guitar body contacting surface that defines, with said fretboard receiving surface, a predetermined angle; said guitar neck also includes a sloped channel opening on both said fretboard receiving surface and said guitar body contacting surface;
a neck extension having a generally pointed portion configured and sized as to be received within said sloped channel, and a generally rectangular projecting portion configured and sized to enter the generally rectangular channel of the neck receiving block;
wherein when said guitar neck assembly is assembled to the guitar body a) an adhesive is used to securely mount said rectangular projecting portion of said neck extension into the generally rectangular channel, and b) mechanical fasteners are used to securely mount said guitar body contacting surface of said heel to the guitar body.
In accordance with another aspect of the present invention, there is provided a guitar neck assembly comprising:
a guitar neck including a head portion, a heel portion and a central portion provided between said head portion and said heel portion; said central portion defining a fretboard receiving surface; said heel portion defining a guitar body contacting surface that defines, with said fretboard receiving surface, a predetermined angle; said guitar neck also includes a sloped channel opening on both said fretboard receiving surface and said guitar body contacting surface;
a neck extension having a generally pointed portion configured and sized as to be received within said sloped channel, and a generally rectangular projecting portion.
In accordance with another aspect of the present invention, there is provided a neck to body attachment method for a guitar comprising:
providing a guitar body having a neck receiving block provided with a generally rectangular channel;
providing a guitar neck including a head portion, a heel portion and a central portion provided between the head portion and the heel portion; the central portion defining a fretboard receiving surface; the heel portion defining a guitar body contacting surface;
shaping the guitar body contacting surface of the heel portion so that a) it defines, with said fretboard receiving surface, a predetermined angle, and b) it conforms to the shape of the neck receiving block area of the guitar body;
forming a sloped channel opening on both the fretboard receiving surface and the guitar body contacting surface;
providing a neck extension having a generally pointed portion configured and sized as to be received within the sloped channel, and a generally rectangular projecting portion;
mounting the generally pointed portion of the neck extension in the sloped channel of the guitar neck via an adhesive;
providing a fretboard;
mounting the fretboard to the fretboard receiving surface of the guitar neck via an adhesive;
mounting the guitar neck to the guitar body by inserting the generally rectangular projection of the neck extension into the generally rectangular channel of the guitar body and securing it therein via an adhesive; and
installing mechanical fasteners between the neck receiving block of the guitar body and the heel portion of the guitar neck.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
In the appended drawings:
Generally stated, the present invention relates to a guitar neck assembly so configured as to be mounted to a guitar body via two types of attachment: an adhesive and mechanical fastener. The guitar neck includes a neck extension that is added after the neck angle with respect to the guitar body is adjusted. The neck extension allows a better attachment between the neck and the guitar body while allowing the heel of the neck to be perfectly fitted to the guitar body before the neck extension is mounted to the neck.
Turning now to
The neck assembly 16 may be better seen from
When the neck assembly 16 is mounted to the guitar body 12, an adhesive such as glue is provided between the neck extension 30 and the corresponding channel to thereby provide a first means of attachment of the neck assembly 16 to the guitar body 12.
After the neck extension 30 is inserted inside the corresponding channel of the guitar body 12, mechanical fasteners such as machine screws (not shown) are inserted through the guitar body 12 into the inserts 28 of the heel, thereby ensuring an adequate contact between the guitar body contacting surface 26 of the heel and the neck contacting surface of the body 12. The mechanical fasteners and the inserts 28 provide a second means of attachment of the neck assembly 16 to the guitar body 12. Furthermore, the mechanical fasteners also act as clamps during the glue setting time.
Turning now to
To shape the guitar body contacting surface 26, a machine 32 as schematically illustrated in
It is to be noted that the precise shaping of the guitar body contacting surface 26 with the machine illustrated in
The next step is to drill the holes and install the inserts 28 in the guitar body contacting surface 26. To do this, the neck is advantageously maintained onto the table 36 to drill the holes at the adequate angle. The result of this step is illustrated in
Next, a rectangular slot 48 is routed from the fretboard receiving surface 31. This slot is configured and sized to receive a conventional truss rod.
A sloped channel 50 is then machined into the neck blank (
The neck extension 30 is then mounted to the sloped channel 50 (
It is to be noted that while the above description was directed to a conventional and so-called “flat top acoustic guitar”, other types of acoustic, semi-acoustic and electro-acoustic guitar with or without soundholes could be designed with a neck assembly as described herein.
Although the present invention has been described hereinabove by way of preferred embodiments thereof, it can be modified, without departing from the spirit and nature of the subject invention as defined in the appended claims.
| Number | Name | Date | Kind |
|---|---|---|---|
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| 4027570 | Rendell et al. | Jun 1977 | A |
| 5125311 | Boulanger et al. | Jun 1992 | A |
| 6051766 | Taylor | Apr 2000 | A |
| 6265648 | Steinberger | Jul 2001 | B1 |
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| 6831218 | Steinberger | Dec 2004 | B2 |
| 6833501 | Jagmin | Dec 2004 | B2 |
| 20030106409 | McPherson | Jun 2003 | A1 |
| Number | Date | Country |
|---|---|---|
| 8800752 | Jan 1998 | WO |
