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Publication numberUS3596552 A
Publication typeGrant
Publication dateAug 3, 1971
Filing dateFeb 13, 1970
Priority dateFeb 17, 1969
Also published asDE2006977A1, DE2006977B2
Publication numberUS 3596552 A, US 3596552A, US-A-3596552, US3596552 A, US3596552A
InventorsLager Birger
Original AssigneeNordiska Piano Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Devices for securing strings in musical instruments
US 3596552 A
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Description  (OCR text may contain errors)

United States Patent Inventor Birger Lager Vetlanda, Sweden AppL No. 11,196 Filed Feb. 13, 1970 Patented Aug. 3, 1971 Assignee AB Nordislu Piano Brogdsgatan, Vetlanda, Sweden Priority Feb. 17, 1969 Sweden 2179/69 DEVICES FOR SECURING STRINGS IN MUSICAL INSTRUMENTS 3 Claims, 5 Drawing Figs.

U.S. Cl 84/207, 84/297 Int. Cl Gl0c 3/10, GlOd 3/12 Field of Search 84/200,

[56] References Cited UNITED STATES PATENTS 416,334 12/1889 Holloway 84/207 974,095 10/1910 Schlemmer.... 84/207 3,407,696 10/1968 Smith et a1 84/297 Primary ExaminerRichard B. Wilkinson Assistant Examiner-John F. Gonzales Attorneys-Ralph E. Bucknam, Jesse D. Reingold, Robert R.

Strack and Henry A. Marzullo, Jr.

ABSTRACT: A device which serves to secure strings in pianos and like stringed instruments in a simple and reliable manner with the aid of a swingably mounted tension element having an arcuate portion and a likewise arcuate groove therein, in which the string is placed in a state folded back upon itself so as to be clamped in the groove by wedge action when the element is swung and thereby tensioned.

PATENTEU Aug 3m DEVICES FOR SECURING STRINGS IN MUSICAL INSTRUMENTS This invention relates to a device for securing strings in pianos and like stringed instruments to an element that is arranged to be swung for tightening or tuning the string.

The device suggested according to the present invention has been constructed for the setting-up of strings in musical instruments but it also has other similar uses. The novel features of the device according to the invention reside in that the device comprises an element which can be swung about an axis transverse to the direction of the string and in which a V-shaped groove is formed so as to extend in an are around said transverse axis, that a pin extending transversely of the direction of the string is provided at the distal end of said groove as viewed from the end of the string secured to an abutment, and that the distance between the boundary walls of the V-shaped groove at the bottom thereof is smaller than the cross section of the string, and a part of the string is bent about said pin and drawn along the bottom of the groove at some distance therefrom, while that part of the string which is fixed to the abutment shall extend, counted from the string part bent around the pin, along the groove exteriorly of said string part to urge it inwardly in the groove.

A preferred embodiment of the invention will be more fully described in the following with reference to the accompanying drawing in which:

FIG. 1 is a side view of a tension lever with an element to which a string is to be secured;

FIG. 2 is a view of said lever as seen from below;

FIG. 3 is a cross section of said lever;

FIG. 4 is a view of said lever as seen from above;

FIG. 5 is a cross section of part of the lever shown in FIG. 2.

The tension lever is generally designated 1 and at one end has a recess 2 for a tension screw and at the other end an arcuate portion 5 which engages the string and coacts with a recess 4 formed in a support 3 and serving as a guide for the lever. Upon tightening and untightening, respectively, of the screw which is shown by broken lines, the tension lever 1 will thus swing about an axis passing through the center of the portion 5, the bottom of said portion sliding in the recess 4 which preferably also has an arcuate shape. Moreover, the lever has an edge-shaped projection 6 which when the lever is swung beyond a given angular position about the axis passing through the portion 5, engages the support 3, thereby forming a new axis for the lever to swing about.

Accordingly to the invention, the portion to which the string 9 is to be clamped has an arcuate surface 10 which is part of the arcuate portion coacting with the recess and to which the string 9 is a tangent. A V-shaped groove 11 is formed in said arcuate surface 10 and at the distal part of the groove as viewed from the other end of the string the groove is of greater depth at 12. A pin or like element 14 extends through the boundary walls 13 at the deeper part 12 of the groove. At the bottom the V-shaped groove 11 is of a width slightly smaller than the diameter of the string to be secured. At the fixation of the string the end part 9 thereof is passed beneath the pin 14 so that said end part runs along the bottom of the groove past the recess 4 in the support 3 and through a recess 15 in the edge-shaped projection 6. The remaining string is bent around the pin 14 and so oriented as to run exteriorly of the string end part 9' in the groove 11. After the opposite end of the string has been secured the superimposed string part, upon pivotment of the lever 1, will urge the string part extending along the bottom of the groove inwardly therein so that it will be fixedly retained by the wedge action arising between the string and the boundary walls of the groove.

The invention is not restricted to the embodiment described and illustrated but can be modified in several ways within the scope of the appended claims.

What I claim and desire to secure by Letters Patent is: I. A device for securing strings in pianos and like stringed instruments to an element that is arranged to be swung for tightening or tuning the string, wherein the device comprises an element which can be swung about an axis transverse to the direction of the string and in which a V-shaped groove is formed so as to extend in an are around said transverse axis, a pin extending transversely of the direction of the string is provided at the distal end of said groove as viewed from the end of the string secured to an abutment, and the distance between the boundary walls of the V-shaped groove at the bottom thereof is smaller than the cross section of the string, and a part of the string is bent about said pin and drawn along the bottom of the groove at some distance therefrom, while that part of the string which is fixed to the abutment shall extend, counted from the string part bent around the pin, along the groove exteriorly of said string part to urge it inwardly in the groove.

2. A device as claimed in claim 1, wherein the V-shaped groove runs in an arc concentrically around the axis which the element can be caused to swing about.

3. A device as claimed in claim 1, wherein the V-shaped groove extends along a portion of the element that has an arcuate surface which is adapted to engage with and be received in an arcuate recess in a support, so that upon swinging of the element the arcuate surface will slide in said recess.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US416334 *Mar 30, 1889Dec 3, 1889 Elmer e
US974095 *Sep 30, 1909Oct 25, 1910 Tuning device for stringed instruments.
US3407696 *Sep 14, 1967Oct 29, 1968Jimmy G. SmithStringed musical instrument stable, harmonic-free tuning
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4141271 *Sep 1, 1976Feb 27, 1979Mullen Delmar EMethod and apparatus for preventing improper string return
US4562766 *Jun 6, 1983Jan 7, 1986Scholz Donald TString tuning and fastening arrangement
US4696218 *Sep 8, 1986Sep 29, 1987Hoshino Gakki Co., Ltd.Fastening means for guitar strings
US5285709 *Sep 20, 1989Feb 15, 1994Grant John DMachine head for tuning a stringed instrument, especially a guitar or the like
US6563037Aug 22, 2001May 13, 2003Richard Hugh HamiltonGuitar string attachment device
WO1990003637A1 *Sep 20, 1989Apr 5, 1990John David GrantMachine head for tuning a stringed instrument, especially a guitar or the like
WO1993002444A1 *Jul 24, 1991Feb 4, 1993Vladislav Vladimirovich VolkovTensioning device for keyboard stringed musical instrument
Classifications
U.S. Classification84/207, 84/297.00R
International ClassificationG10C3/00, G10C3/10, G10D3/00, G10D3/12
Cooperative ClassificationG10C3/10
European ClassificationG10C3/10