USRE17546E - Bttbsblii w - Google Patents

Description

R. W. HAGEN.

Dec. 31, 1929.

DRUMA original Filed Feb. 1, 192:5

Reissued Dec. 31, 1929 p UNITED STATES PATENT OFFICE DRUK mal lo. 1,615,308, dated January 18, 1927, Serial No. 616,308, led ebx'uary 1, 1928. Application for reissue led October 19,1928. Serial No. 313,600. i

Futher object of the invention is to amplify and improve the construction of drums and particularly the tension devices for the Y 10 heads. Further advantages will be better apparent from a detailed description of the invention in connection with accompanying drawings, in which- Fig. 1 is a plan view of a drum embodying u minvention.

i 2 is an enlarged sectional view substantrally along the line 2-2 of Fig. 1.

Fi 3 is an enlarged sectional view substantially along the line 3-3 of Fig. 2; and l Fig. 4 is a. detail sectional view substantially .along the line 4 4 of Fig. 3.

In the construction shown 1n the drawings, the body of the drum is formedby two annular parts 1 and 2, preferably formed of metal.

lo The parts 1 and 2 are formed with channel portions 3 and 4 respectively which extend outwardly from the plane of the upper and lowermost extremities of the drum body. These channels, it will be observed intert. 30 In assembling the parts 1 and 2 together, the free margin of the channel portion 4, is left as forming a continuation of said channel portion and the other channel ortion 3 is then inserted therein, after whic said marginal portion is turned or spun inwardly upon t e annular flange part of said channel portion 3. In the annular fla-nge parts of the channel Portions is a plurality of tubular bolts or s eeves 5 each witha head on the outside of said flange arts. The inner end of the sleeve 5 is threa ed and a'nut 6 is screwed thereon. Positioned between the nut 6 and the adjacent wall of the channel portion of the drum body will be found an angle clip 7 which further strengthens the parts and which is also held in place by said nut. Thus all of the parts are rigidly held in desired placed position by the structure described.

The sleeve 5 is also internally threaded as 60 indicated at 8 and accommodates the threadis provided. f

ed end `portion 10'of the rod 9. There are a plurality of these various parts but inasmuch as the construction of all are alike, a description of the construction and operation of-one thereof will suice for all., The upper end of the rod 9 extends through a clip 11 which engages the tension hoop 12. The tension. hoop 12, in turn, bears against the ring 13 around whichis disposed the flesh hoop l5 to ywhich the head vellum or skin 14 is secured. The outer end of the rodv 9A is preferably squared so that it can be rotated by means of a key. By turning the rod 9 the flesh hoop 15 can be moved axially of the drum, eitherxto stretch y or loosen the head Vellum or vskin 14 to bring the same to thedesired state of tension.

Y It will be observed that the channel portion .of the drum extends outwardly beyond the plane ofthe ad'ustable rods so that all danger -A of injuring or isturbing the rods by engagement Kwith extraneous articles is eliminated. Furthermore by the construction illustrated an extremely ri d durable andellicient drum erforms another important function in that 1t acts as an expansion chamber for thesound vwaves set in motion iny the layin ofthe drum, so that overtones are a sorbe therein and cannot produce rattling and other objec- -tionable noises. Againtheangle clips 7 are important because they assist 1n ri diffying the drum shell which is made of t inv sheet yimetal.

Suchreenforcing or bracing is im ortant view of the tension exerted upon t e resonating chamber formedvby the channelportions 3 and 4, andanyl method of reenforcement that will accomplish its object is contem lated by the invention.- It mightybe dnsira leV to provide a threaded element for receivingthe rod 9 independent ofthe ksleeve 5, the primary function of said sleeve be' to secure together the interiitting parts 1an 2. Itis obviously within the scope4 of the invention to secure within the resonating chamber a suitable threaded member having no mechanical connection with the sleeve 5.

I claim:

1. A drum embodying therein a body com- MEYEB, Gl' M'.

e `channel construction also 2 e I y 17,541;

engaging channel portions includin annu ar angelike parts, a head and hea ringk on each end of the bodyz a tension hoop engaged with eachhead rmi, sleeves extend- 5 ing through said angeli e parts and securing them together, and tension rods operatively engaged with the tension hoops and threaded into said sleeves in said angelike parte. 'y

2. A drum embodying thereina body comprising two body shell members having interengaglng channel portions including annular dan like parts, a head and ring on each end of t e' body,l sleeves extending through saidl angelke parts and securing them together,

- tensloln rods threaded into saidfsleevagbcoirner clps en 'ng portions o -sai Vo y shell membeigggaind said iange parts and through which said sleeves also extend, and

nuts threaded on said sleeves securing l v o V said corner clips against said ilange parts'. t

" 3. A; drum comprising a body shell having an annular channel portion' 'including topand bottom annular flangelike parts, a head an and ahead ring on each end of the body l ,y n o shell, said" channel portionl defining an exi y v n 'f pansionchamberext'ending circumferentially about the body; shell ata point between the ends thereof, a tension hoop engaged with Aaofeach. head ring, means for securing together -4 n saidtop and bottom angelike parts, tension o n l y rods engaged with the tension hoonssaid f i rods extending 'through said top and bottom y v angelike partsyfand means in the channel l pidrtion for receiving the ends of the tension r s. 4. A drum comprising a shell having an venlarged intermediate portion to serveyas a resonating chambenheadsstreacled over the 40 marginsof the shell. tension rings engaging the margins of the heads, a 'plurality of tension rods engaging the tension hoops. means in the resonating chamber for receiving the tension rods, and'reenforcing elements in the l l lreasonating chamber. y" j s f x f (s,

" 5; Adrumembodvingtherein. abodv'shell y f f i 'y s o ll'laving an annular channelnort'inn including f s `ton and bottom annular an'gelike Darts( a head and head ring on veach `end' of the body shell. said channel 'portionsdefining an ex-` ,y Y pansion chamber extending circumferentially aboutthe bodyshell at apointbetween the 'ends thereof. a. tension' hoonA engaged with each head' ring. means fixed in said topM and L 5v5 bottom Hangelike narts for securing said i 'parts together,k and tension,v rods extending'y y y lthrough,said ton and bottom angelike narts `eng'wredl fwith the tension hoops and operf atively secured insaidlastment'ioned means. In testimony whereofl.' hereunto 'ax my signature', s f

- RUSSELL HAGEN.

Images