US971833A - Trombone. - Google Patents

Trombone. Download PDF


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US971833A US35071507A US1907350715A US971833A US 971833 A US971833 A US 971833A US 35071507 A US35071507 A US 35071507A US 1907350715 A US1907350715 A US 1907350715A US 971833 A US971833 A US 971833A
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Joseph L De Good
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    • G10D7/00General design of wind musical instruments
    • G10D7/10Lip-reed wind instruments, i.e. using the vibration of the musician's lips, e.g. cornets, trumpets, trombones or French horns





Patented 0015.4, 1910.


WITNESSES Hemus PE1-:Rs ca., wAsmNcmN, D. c.



To all whom it may concern:

Be it known that I, JOSEPH L. DE GooD, a citizen of the United States, residing at Detroit, county of Vayne, State of Michigan, have invented a certain new and useful Improvement in Trombones, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had .to the accompanying drawings, which form a part of this specification.

This invention relates to trombones; it has for its object improved connections between that part of the extensible tubel which is fixed to the bell of the trombone and the removable or sliding part thereof.

In the drawings Fignre 1, shows a trombone in elevation, a part of the sliding tube, and a part of the slide on the xed member, being broken away. Fig. 2, is a longitudinal section through my improved connection. In this figure the broken-olf portion to the right of the main portion of the figure would, if the entire tubular connection were shown, be considerably extended to the right of its present ending. Fig. 3, is a perspective, showing an additional bearing sleeve member. Fig. 4, is a longitudinal section through that portion of both of the tubes constituting t-he outer or inclosing slide member, and extending a short distance on each side of each, the section showing a portion of the tubing on each side of the crosswise hand-bar by pressure upon which the movable sound-regulating tubes are adjusted, with respect to the mouth and bell portion, to produce the variety of tones desired.

1 indicates the bell of the trombone, and 2 the mouth piece.

3 indicates a tube extending from the bell to the pointof connection of this part with the sliding member.

4L indicates a curved sliding tube, which connects the tube 3 with the mouth piece 2 through the intervening members hereinafter to be described, being adjustable in order to vary the tone of the instrument.

The mouth piece 2 is inserted in a sleeve 5, from which extends a lonO` tube G, which engages within the members 1 of the curved sliding tube 4. A sleeve 8, similar to the sleeve 5, forms a coupling between the tube 3 and the tube 9, which projects parallel Specification of Letters Patent.

Application led January 4, 1907.

Patented Oct. 4, 1910. Serial No. 350,715.

with, and is of equal length with, the tube 6. Between that end of the tube 6 which is nearest the mouth piece 2, and the sleeve 5, is an annular chamber within which one end of a bearing sleeve 10 engages. rThis and its companion sleeve 1l, which occupies the same relation to the inner tube 9, are firmly, though removably, fixed within the adjacent ends of the tubes 7 and 7a, respectively, and, with them, are capable of slidable movement along, and with respect to, the inner tubes 6 and 9. These tubes 6 and 9 are provided with enlarged end portions 12-12, of which one is seen in Fig. 2, of such diameter as to lit closely, though slidably, inside of the member' 7, their object being to malte a tight-fitting joint between it and the inner end of the tubes 6 and 9.

The bearing sleeve l0 is a tubular member provided wit-h a collar 13, about midway of its length; that portion between the collar and the end which is toward the tube 7 is of such diameter as to fit tightly within it when forced thereinto. The corresponding part of the bearing sleeve 11, between the collar 14 and the end, engages within the member 7a. That portion of the bearing sleeve 10 which is between the collar 13 and the sleeve 5, engages loosely in the end portion thereof, and that portion of the sleeve 1l between the collar let and the sleeve 8 similarly engages in the annular chamber at the end of t-he sleeve 8. 'Ihe cross-piece 15, Fig. l, is the usual brace between coupling parts 5 and 8, and cross-piece 16 is the usual brace between end sleeves 17-1"=L on tubes 7 and 7L respectively.

lith this construction, the sliding tube can be moved in the ordinary way, and in this movement the bearing sleeves l0 and ll, travel with the sliding members 7 and 7a, to which they are held by their tight engagement; in this travel, they slide easily and smoothly on the tubes 6 and 9. The movement of the one part upon the other is on bearing parts at the free ends of the outer tubes 7 and 7a, and this causes a smooth movement in place of the inaccurate rocking movement which takes place when the space between the outer and inner tubes is not iilled, as is necessary when that space is sufficiently large to allow the introduction of the inner tubes with enlarged piston-like ends, that have heretofore been used. I'Vhen the tubes 7 and 7 a are drawn out, with respect to the tubes 6 and 9, these bearing sleeves cooperate with these enlarged end portions 1n furnishing suitably spaced bearing surfaces,

each fitting tightly within one of the tubes 7 or 7, for the sliding' of the tubes 6 or 9. Then the sliding tube portion 4 is moved as far toward the mouth piece portion of the trombone as possible, of course the enlarged piston ends of the tubes 6 and 9, and the bearing sleeve portions l() and 1l, are as far away from one another as is possible. lvlhen, however, the curved sliding portion et is moved outwardly to produce various notes, the bearing points constituted for each of the tubes 7 and 7a by the enlarged piston ends of the tubes 6 and 9, and the bearing sleeves l0 and l1, approach one another, so that when t-he sliding tube portion t is at the outer limit of its travel, the enlarged portions 12 abut against the outer ends of the bearing sleeve portions. In this position, the space between the bearing 'points is not merely the distance from the enlarged pist0n portions l2 to the then quite inner ends of the tubes 7 and 7a, but in addition, the distance from the collars 13 and 14 on these bearing sleeves l0 and ll (which are then abutting closely against the ends of the tubes 7 and 7a) to the opposite end of these bearing sleeve members, t-hat is, the end toward the mouth piece 2, since this part of each bearing sleeve at all times projects beyond the end of its tube 7 or 7a. The wearing of the walls of the tubes by the rocking of one tube 7 or 7, with respect to its telescoping tubes 6 or 9, is thus prevented, and the short bearing surface of the enlarged piston ends of the tubes 6 and 9, which this arrangement males possible-merely enough to render its engagement within its inclosing tube 7 or 71 air tight-reduces to a desirable degree the frict-ional resistance to the movement of the entire sliding tube t, as the instrument is played.

Preferably the outer end of the sleeve 8, into which the adjacent end of the bearing sleeve v1l is adapted to engage when the curved sliding tube 4 is moved as far toward the mouth piece port-ion 2 as possible, is provided with a cushioning packing 16, against which the end of the bearing sleeve ll seats when the parts are in this position; and so also the length of the outer tube 7a and the inner tube part 9, is preferably so proportioned that the expanded piston end l2 does not strike or engage against the end of the bearing sleeve 1l within the tube 7a, even when the trombone has been moved to the socalled seventh position.

It is obvious that the sliding tube may, at any time, be entirely removed from t-he inner members, if this be desired for any purose. `What I claim is:-

l. In a trombone, in combination with a bell portion and a mouth piece portion in fixed relation to one another, a pair of inner tube members fixed with respect to said bell and mouth piece portions, enlarged terminals at the end of each, complementary outer tubes joined at their outer ends adapted to slidably engage thereover, and, with whose inner faces said enlarged terminals closely engage, and a removable bearing sleeve fitting closely for a portion of its length only within the end of each outer tube and fitting closely about the corresponding inner tube, adapted to coperate with the enlarged piston terminal portion in constituting elongated bearings for the relative movement of the inner and outer tubes.

2. In a trombone, in combination with a bell portion and an adjacent tubular portion occupying a fixed relation with respect thereto, a pair of inner tube members projecting from said tubular portion in parallel relation, a pair of outer tubes adapted to engage slidably over said inner tube members, enlarged terminal portions carried by said inner tubes and adapted to tit closely within said outer tubes, bearing sleeve members removably fixed within the inner end of said outer tubes, each having a portion of its length projecting outside of its tube toward the fixed portions of the trombone, and cooperating wit-h said enlarged terminal portions by engagement about said inner tubes in furnishing a plurality of longitudinally spaced bearing surfaces for the relative movement of the inner and outer tubes.

3. A slide trombone, comprising an outer tubular member having two ends and a detachable bearing at each end, and an inner tubular member having two ends and slidably mounted in said bearings and having bearings at its ends in said outer member, said several bearings taking the wear between said members.

In testimony whereof, I, sign this specification in the presence of two witnesses.

JOSEPH L. DE GGD. lVitnesses:


US35071507A 1907-01-04 1907-01-04 Trombone. Expired - Lifetime US971833A (en)

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US35071507A US971833A (en) 1907-01-04 1907-01-04 Trombone.

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