United States Patent 3561716

An adjustable support for cymbals and other small percussion devices (traps), wherein a lug has provided therein means to define elongated parallel rails having relatively sharp edges. Mounted in the lug, and adjacent such rails, is a generally cylindrical shaft in which is formed a large number of longitudinal grooves adapted to receive the rail edges. A setscrew is provided to force the shaft against the rails, so that the rail edges seat in the grooves and lock the shaft against rotation whereby to prevent undesired movement of the cymbal (or other percussion device) which is connected to the shaft.

Thompson, Josephus B. (Covington, OH)
Stade, Administrator. K. E. (Covington, OH)
Application Number:
Publication Date:
Filing Date:
Primary Class:
Other Classes:
84/421, 403/119, 403/362, 984/150
International Classes:
G10D13/02; (IPC1-7): A47F5/00
Field of Search:
248/183,184,185,278,279,282,284,289,188,291,286 287
View Patent Images:
US Patent References:
2691532Stop device for roller skates1954-10-12Hayner

Primary Examiner:
Frazier, Roy D.
Assistant Examiner:
Foss, Franklin J.
I claim

1. A device for use in supporting percussion musical instruments, which comprises:

2. The invention as claimed in claim 1, in which said arm is employed in the support of a percussion musical instrument, and is longitudinally shiftable in said lug during periods when said setscrew is in a release position.

3. The invention as claimed in claim 1, in which said arm extends through openings in the ends of said lug, said openings being substantially larger than the diameter of said arm whereby to permit lateral movement of said arm relative to said lug to effect locking of said arm on said edge portions.

4. The invention as claimed in claim 1, in which said grooves on said arm are knurled.

5. The invention as claimed in claim 1, in which said longitudinal groove in said rail-defining member has a depth sufficiently great that the bottom wall of said longitudinal groove is always out of engagement with said arm.

6. The invention as claimed in claim 1, in which the spacing between the sides of said groove in said rail-defining member is such that the penetrated grooves in said arm are spaced circumferentially apart about 100°.


1. Field of the Invention

This invention relates to the field of percussion musical instruments such as drummer's traps, including cymbals, wood blocks, and others.

2. Description of the Prior Art

It is conventional in the indicated field to mount cymbals and the like onto bass drums by means of relatively expensive adjustable supports. This is because the repeated vibrations caused by striking of the cymbal, wood block, etc., have tended to loosen less expensive supports such as those wherein a sharp-pointed setscrew engages a knurled cylinder. The prior art, particularly in the field of relatively low-cost supports for traps, has also been deficient relative to such important areas as attractiveness, compactness, simplicity, etc.


In accordance with the present invention, an attractive and decorative lug has mounted therein a means to form a plurality of elongated parallel rail edges. Such edges are adapted to seat in selected ones of a large number of elongated longitudinal grooves which are small in depth, being formed in the cylindrical arm of a cymbal (or other) support. A setscrew is provided to urge the grooved cylinder against the rail edges, thereby rigidly locking the arm against rotation.


FIG. 1 is a perspective view of a bass drum having mounted thereon a cymbal support constructed in accordance with the present invention, and which is shown as connected to a cymbal;

FIG. 2 is a greatly enlarged perspective view of the percussion instrument support of the present invention;

FIG. 3 is a longitudinal sectional view on line 3-3 of FIG. 2; and

FIG. 4 is a transverse section along line 4-4 of FIG. 3.


Referring first to FIG. 1, as a bass drum 10 having spurs 11 is adapted to support various drummer's traps including the illustrated cymbal 12. Cymbal 12 is suitably secured to a support post 13 which is preferably tubular in nature, being adapted at the lower end thereof to telescopically receive the generally vertical arm 14 of an angle member 15 (which may be formed of steel). A setscrew connection is provided at 16 in order to permit adjustment of the support post 13 to various positions along the arm 14, thus raising or lowering the cymbal 12.

The angle member 15 also has a horizontal arm or shaft 18 which may be referred to as a journal portion since it is adapted to rotate (to a limited extent) in a bearing 19 formed by a decorative lug. About 180° of such rotation is possible, but the drummer normally rotates the angle member 15 through a much smaller angle in order to position the cymbal 12 as desired.

There will next be described the bearing or lug 19 and associated elements, and the manner of cooperation thereof with the journal arm 18. The lug 19 has an open bottom but is otherwise closed by end walls 21 and a decorative top wall 22. Formed coaxially in the end walls 21 are oversize bearing openings 23 adapted to receive the journal arm 18 in loose-fitting relationship. The holes 23 are sufficiently large that the journal portion 18 may rotate freely therein in the absence of the constraint described hereinafter, thus permitting rotation of the angle member 15 in order to adjust the position of cymbal 12.

A rail-defining member 24 formed of steel, for example, is mounted in the open-bottomed portion of bearing lug 19. As best shown in FIG. 4, member 24 is generally rectangular in cross-sectional shape, and has upper corners which seat against shoulder portions 26 of lug 19 in order to limit the extent of upward insertion of the member 24 into the lug. It is emphasized that, as shown in FIG. 3, the rail-defining member 24 is relatively long and fills a large portion of the open bottom of lug 19.

As shown in FIG. 4, rail-defining member 24 has a longitudinal groove 27 in the full length of the upper surface thereof, and which is adapted to receive the lower portion of the journal arm 18. The illustrated groove 27 is rectangular in section. Rail or locking edge portions 28 are formed on member 24 at the upper and outer portions of groove 27, each such rail being defined by a vertical sidewall 29 of groove 27 and by the adjacent upper surface 30 of member 24. The apexes of the rails, where surfaces 29 and 30 intersect, are relatively sharp.

The spacing between the vertical faces 29, and the depth of the groove 27, are sufficiently great that a substantial proportion of the circumference of journal arm 18 is received within the groove 27. Preferably, such proportion is about 100°, although certain other angles are satisfactory. In any event, the shaft angle received within groove 27 should be substantially less than 180° since it is not desired that the faces 29 be spaced apart by a distance equal to the outer diameter of journal arm 18.

A large number of longitudinal and parallel grooves 31 is formed externally on journal arm 18, such grooves being narrow, small in depth, and closely adjacent each other. Each groove is parallel to the axis of arm 18, and is sufficiently large to receive in locking relationship a locking edge 28 (or at least the extreme apex portion thereof). The number and sizes of grooves 31 are correlated to the spacing between faces 29 in such manner that two spaced-apart grooves 31 will simultaneously receive the apexes of two rails, to thus provide a double-locking action preventing rotation of journal 18 in the bearing lug 19.

Because the grooves 31 are numerous and closely spaced, the drummer may position the cymbal 12 (or other percussive device) at any one of a large number of positions. However, because the rails 28 and grooves 31 are long, there is a surprisingly high degree of rigidity in the resulting connection. Stated otherwise, the substantial lengths of the rails and of the grooves create a relatively large amount of bearing area despite the fact that the grooves are numerous and relatively shallow.

As indicated above, the diameter of journal arm 18 is substantially larger than the spacing between groove walls 29. The journal arm engages the rail edges on one side of a diametral plane through the axis of arm 18.

The grooves 31 may be economically formed by knurling, using appropriate dies. Thereafter, the journal element may (if desired) be suitably hardened. Although the grooves 31 may be formed by knurling, with resulting production economies, it is emphasized that there is no mere roughening or crisscrossing of the journal arm 18 but instead a precise formation of grooves thereon which are longitudinal and parallel to the axis of the journal 18 and are adapted to receive simultaneously the two rail edges 28. The journal arm 18 may be referred to as serrated, it being emphasized that the grooves or "serrations" 31 are sufficiently long to provide substantial bearing area relative to the rail edges 28.

A setscrew 32 is threadedly inserted through an internally threaded boss portion 33 of the upper lug wall 22. The setscrew has a relatively flat or smoothly rounded lower end adapted to engage journal arm 18 at a region diametrically opposite the groove 27 in rail-defining member 24. Thus, tightening of setscrew 32 forces the journal arm 18 downwardly against the rails or locking edges 28, causing such locking edges to be forcefully received within grooves or serrations 31 in order to effectively lock the journal portion 18 against rotation.

Prior to tightening of the screw 32, the angle member 15 is adjusted to such a rotated position that the cymbal 12 is located as desired. Furthermore, it is pointed out that the arm 18 is sufficiently long that a very substantial amount of adjustment thereof is permitted in the lug 19, thus providing a substantial degree of adjustment of the position of cymbal 12 in a direction perpendicular to the plane of rotation of support elements 13--14.

The lower end of the setscrew 32 being flat or rounded, it does not seat in grooves 31.

The lug 19 containing the rail-defining member 24 is readily mounted on the shell 34 of the bass drum 10 or other support. Such shell has openings 36 (FIG. 3) therein which are sufficiently large to receive internally threaded lug portions 37 formed at the ends of a bearing lug 19. Screws 38 are threaded upwardly into the boss portions 37 in order to clamp the bearing lug 19 tightly against the external surface of drum shell 34, the lug preferably having a decorative skirt portion 39 which serves to increase the bearing area against the drum shell.

The depth of the rail-defining member 24 is so selected, and so related to shoulders 26 (FIG. 4), that member 24 is clamped tightly against shoulders 26 when skirt 39 is drawn into close engagement with shell 34 as described. Therefore, it is a simple matter to not only mount the lug 19 on the shell 34 but also firmly secure the rail-defining member 24 in the lug 19, all in response to tightening of only the two screws 38. Journal arm 18 is then inserted through the oversize openings 23, following which the setscrew is inserted and tightened in order to seat the journal arm against the rail edges 28.

It is emphasized that the sizes of openings 23 are sufficiently great to permit unobstructed seating of the serrated or grooved journal arm 18 on rail edges 28. Similarly, groove 27 in the member 24 is sufficiently deep to permit unimpeded seating of the grooved journal arm on edges 28.

The described construction is characterized by relatively low cost of manufacture, yet it is highly decorative in nature. More importantly, it effects a very high degree of locking of the journal arm 18 against rotation despite the pounding and vibration incident to the playing of percussive musical instruments.