US1976674A - Power transmitter for power tables - Google Patents

Description

Oct. 9, 1934. l. F, WEBB POWER TRANSMITTER-FOR POWER TABLES Filed Aug. 21, 1933 2 Sheets-Sheei, l

vvv? Ilm s@ w v [Puig/y E lVebb l. F. WEBB POWER TRANSMITTER FOR POWER TABLES Oct. 9, 1934.

Filed Aug. 21, 1933 2 Sheets-Sheec lIrvin/Cy E' Webb Patented Oct. 9, 1934 POWER TRANSMITTER FOR, f 'raisinsl Y y OFFICE? POWER Irving F. webb,.Elizabeth, N. J., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of ANewJersey Application August 21, 1933, Serial No. 685,996

' s claims. (c1. 19a-17) This invention relates to 'improvements in power-transmitters for sewing and like machines, and more particularly in power-transmitters of the type disclosed, for instance, in the United H215 states 'Patent No. 468,357, Fei.v 9, 1892, tor.

Mller, according' to-which power may be transinitted at will froma constantly-running driving pulley tofaI pulleyof/the driven'machine.v

-Theinvention has for an object to provide sim- 110 ple means for quickly andaccurately applying a power-transmitter to a power tablewith the axis of rotation of the driving and driven elements of the transmitter in proper position'.` j. A further object of the invention is to provide a power table with a power-,transmitter so arranged as topermit of readily 'changing the'table-top to accommodate different varieties of machines. L The inventionconsists inthe devicescombinations and arrangements of parts hereinafter Y' set forth and illustrated Vin the accompanying drawings of a preferred, embodiment of `the invention, from which the several features of the invention andthe advantages attained thereby 1 25 willv be readily understood by those skilled inthe art.v In the drawings, Fig. 1 is a side elevation of the power-transmitter as applied Ato a` power table shown partly in vertical, section. Fig. 2 is 'a top 0 plan view of the transmitter, with the table and transmitter supporting structure in horizontal section. Fig. 3 is a fragmentary end elevation ofthe power table as Viewed from the right in Fig'. 1. Fig. 4 is a detail view in side elevation of the tie-member,'the clamp ltherefor and a pori tion ofthe table standard. i l l Referring to the drawings, the' power-transmitter which constitutes an, improvement of that disclosed in the aforesaid U. S. Patent No. 468,357,

l is shown as applied to a power table forming the subject of the U. S. patent to G. M. Eames, No. 1,695,419, Dec. 18, 1928, to which patents reference may be had for an understanding of details of construction which have not been herein dis` closedvbecause they are deemed unessential to a' full comprehension of the present'invention` The power table has a table-top 1 uponwhich a sewing Yor'other machine (not shown)` issecured, the table-top 1A being suitably cut away to receive the machine or otherwise provided with machine locating 'and securing means,I as is well understood in the art. The table-top 1 is mounted upon-a supporting structure including, in the present instance, an inverted U-shaped endV rail 5 2 disposed transverselypf and underlying the table-top 1. Entering the end rail 2 and suitably secured' thereto, as by welding, are the upper ends of supporting standards (only one of which'is` shown in the drawings) ,y eachcomprising a primary'channel-bar leg-member 3 and a supple- 60 mentaryichannel-bar leg-'member 4 slidingly disposedA for vertical adjustment within'y the legmember 3, said leg-members being substantially U-shaped in horizontal section. In order tor provide for ready replacement of the table-top 1 to thereby adapt the power'v table for different machines, the power-transmitter isv in the present case attached directly to the table-top supporting structure, instead rof being secured, to the underside of the table-top as'` 70V74 said Patent No.' 468,357. The power-transmitter is rigidlyv secured to' the table-top Supporting structure ina manner providing forreadily Sel;- ting up thecomplete power table, as well asfor conveniently effecting angular adjustment of Kthe transmitter into proper position. i A

To this end, the power-transmitting elements are'preferably mounted upon an angularhanger comprising a horizontal bracket-member `,5, a.v

bracket-member 6 depending vertically from lthel 80v horizontaljrmember 5, and a channeledbracketextensionj7. Fixedly carried by the vertical bracket-member `6 is the horizontally disposed; tubular stud-shaft 8 upon which are rotatably journaled'the driving and driven elements 9 and 85` 10,' of which the driving element y9 comprises a stepped pulley having belt connections (not shown) withvvany' suitable powersource and the driven element 10 is in the form of a pulley adapt-v ed toV beconnected by a suitable belt (not shown) V with a machine upon the table-top 1. y

The driving 'element 9 isshiftable axially of the shaft 8 into frctional rdriving engagement with the driven element 10 bymeans of a three-armed lever fulcrumed upon a pivot-bolt '12 spanning 95 the channel of Vthefbracket-extension 7. One arm 13 of said three-armed lever adjustably carries a thrust-plug 14 for engagement with a thrustreceiving disk 15 upon the driving element 9; va

second arm 16 of said lever terminates in a claw 1400 17 overhanging the driven element 10 and engageable ywith a yielding friction material, such as a` piece of round leather 18, carried by the bracketextension 7 and adapted to be pressed as a brake into the groove of the pulley 10. vThe third arm 16.5

19 of said three-armed lever has its free end connected to a suitable treadle or knee-shift, and is also connected :by a coiled spring 20 to a bar 21 rigidly projecting from the bracket-extension 7,

said spring V20 acting to yieldingly rock the lever ll Y 468,357. A belt-guard 27 foth'ediivn elerric'nt` 13, 16, 19 about its fulcrurn-axis 12 to release the driving element from engagement by said lever and to effect braking of the driven element 10. The usual segmental guard 22 is detachably secured by a screw 23 upon the hanger bracket-extension "I, and an oil-well 24 is secured by screws 25 upon the bracket-member 6; said foilV 'well being entered by a wicking 26 depending from the tubular shaft 8 and adapted to carry lubricanttoV the bearings of the driving and driven elements of the transmitter in substantially the same manner.' as more fully disclosed in the aforesaid Patent No.Y I

10 is detachably secured by a screw 28 upon a bossv 29 at the underside of the oil well 24; -r

'Ihe bracket-member 5 ofthehanger",aijfciotv z c, 30, formed with opposed rounded suifas and provided with apertures 3lfloosely; enteredgbyjg bolts 32 extending horizontally through apertures formed in the end rail 2, one of saidbolts` alsofr swung ngulalfly to properly position the' d ing mittersupportin'g fnafr'is fa' d fneveiitl'ilss pro"-k vide fei'r conveniently applying the transriiitterjto adjustment cf ytheL transmitter; iie endgratieiiieinber Seis' secured by'a pivoteolt 37fpn 'the depending,bracket-member6 ofthe' hanger. 'The thejrend ofv said vtie-ineinter iep'roviaea with a' nerizeiiteuyeioingateu slot 38 entered 5y a' 39thr'eaded intol an aprtuieAO preferablyeX-f tending entirely thro-ugh a exempt-breek 4K1'. emmers-,leek n ieiiiepesed 'within'thei eiianneiff the u-siiaped iegfmeinfibeiegi ink a positie-ii' 'such that `the s'c'rew connectin Vof thek tieeinembe" 36 withtheelaine-b1eekn is ioetedjet'iiie, open eide of cie ieg-membei e'iiamiei. v 'inireadeci intenie Y with the screw 42,`constitutes an xpansionclarnfp; providing for minute' adjustment'ithereof both horizontally and vertically within thefleg-'men-ll be'r'4; and that; accordingly the vposition VoftheV tfalls'InttelfV rl'aj'y be ,adjusted by shifting thcfiip'fbieek in the iegeriieiiibe'r; However, niej' transmitter may also be adjusted ine' nii'eii'peep' tion Yof the clamp-fblocky 41. by Vendwise` ailjustl ment offthe tiemember 36A with respectto'theclamp-block. n additionftoth'adyantags dirived from the described construction inthe matter of conveniently and accurately applying the power-transmitter to a power table, it is to be also noted that the expansion clamp arrangement eliminates the objectionable projections at opposite sides ofthe table standard incidental to the commonly employed expedient of securing the transmitter by screws adjustablyenga'ging opposedvouter faces of the table standard. Y

Having thus set forth the nature of the inven- 'toh, what I claim herein ist- -l.S4upperting means for power-table driving devices, comprising a table-supporting frame, a hangar for said driving devices, means for securi-ng`-; said-- hanger for V4angular adjustment upon "'-member, means for releasframeinpacedarelaton to the hanger securing means, "and means adjustably connecting said.

claipneiber and hanger.

eiiieiiiijeeief "clamp-member upon said its y feo from the horizontally disposed member, said horizontally disposed bracket-member terminating at one end in a rounded foot, means for securing said rounded foot to a side faceo1' said rail for angular adjustment of the hanger, driving devices journaled upon the vertical bracketmember of said hanger, a tie-member pivotally secured upon the vertically disposed bracketmember, and means for securing said tie-member to said end rail standard.

IRVING F. WEBB.

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