US2458216A - Adjusting and holding means for rotary disk tools and the like - Google Patents

Description

Jan. 4, 1949. v E, s m T I 2,458,216

' ADJUSTING AND HOLDING MEANS FOR ROTARY DISK TOOLS AND THE LIKE r 2 Sheets-Sheet 1 Filed May 16, 1945 i v M 16 Me/ 42 13\ 7 m fl 26 Z9 70. '16 17 5'24:

. A. ADJUSTING 'AND H0 2,458,216 ROTARY Jan. 4, 194,9. E. SPINDT LDING MEANS FOR DISK TOOLS AND THE LIKE 2- Sheets-Sheet 2 7 Filed May 16, 1945 INVENTOR. d5

TORNEK Patented Jan. 4, i94

ADJUSTING AND HOLDING MEANS FOR ROTARY DISK TOOLS AND THE LIKE Alvin E. Spindt, Hammond, Ind.

Application May 16, 1945, Serial No. 594,093

1 Claim. 1

The invention relates to means for adjusting a rotary tool of the disk type upon a rotary shaft so as to present the working periphery of the tool at a desired angle to the work and it consists in the constructions, arrangements and combinations herein described and claimed.

More specifically, it is an object of the invention to provide a rotary tool holder and adjusting means wherein the tool may be set at desired angles with respect to a rotary shaft upon which it is mounted, such angular adjustment of the tool controlling the path of peripheral travel of the working edge of the tool, which may vary from a straight rotary movement to a direction generally parallel to the rotary shaft.

It is also an important object of the invention to provide a tool holder particularly well adapted for the mounting and secure retention of circular disk devices, such as saws, buffing wheels, grinding wheels, brushes and similar appliances, upon shafts not especially constructed for the mounting of such appliances.

Additional objects, advantages and features of invention will be apparent from the following description considered in conjunction with the accompanying drawings, wherein Figure 1 is a vertical section through the appliance as applied to a circular saw.

Figure 2 is a cross section on the line 2-2 of Figure 1. I

Figure 3 is a sectional view of one of the adjusting collars.

Figure 4 is an inside plan view of one of the holding collars.

Figure 5 is a section on the line 5-5 of Figure 4:.

Figure 6 is an elevation, partly in section, of a modified form of the appliance.

Figure '7 is a sectional view of the modified form of Figure 6, illustrating one stage of assembling upon a shaft.

Figure 8 is an end view thereof.

Figure 9 is a cross section on the line 9-9 of Figure 7.

Attention is first invited to Figure 1 of the drawings wherein there is shown a shaft Ill, which may be rotated by means of any suitable power source, not shown, upon. which the tool holder and adjusting means H is mounted.

The appliance I! consists of a pair of adjust- 2 i6 adapted to rest flatly against a flat face of a tool to be secured upon the shaft, the spherical surface of the collars being presented outwardly for complementary seating engagement of respective holding collars, as will be explained.

A bore I! is formed axially through the collars of a diameter at the planiform face I6 to receive the shaft Iii therethrough, the walls of the bore at diametrically opposite sides, tapering upwardly and downwardly as indicated at I8, the tapered walls terminating inwardly of the spherical surface and outwardly relieved to define respective shoulders [9 arranged in opposed relation to one another. The remaining wall portions of the bore extend parallel with the shaft ill and are of the same diameter as the bore portion ll. Thus an elongated slot 20 is formed opening upon the sphericalsurface of the adjusting collars.

A pair of set screws 2| are threadedly engaged in bores 22 of the collar I2, arranged in opposed relation, the direction of travel of the screws corresponding to the major axis of the elongated slot 20.

Reference is now made to Figures 4 and 5, for an understanding of the construction of the holding collars t5, wherein it will be seen that the collars are formed with a semi-spherical recess 23 of a size to provide a fit upon the spherical.

face of the adjusting collar and permit oscillatory movement in one direction of the adjusting collars. Within the recess 23 a pair of lugs 24 are formed positioned upon diametrically opposite sides of an axial opening 25 formed through the collars. The lugs 24 project from the recess 23 a distance, and are of a width to be received within the elongated slots 20.

A threaded bore 26 is formed in the collar l5 and receives a set screw 21, the bore extending so as to lie in the same plane as the elongated slot 20.

To install the appliance upon the shaft ID, the holding collar [4 is positioned upon the shaft as shown, and the adjusting collar l2 then moved into position upon the shaft, the spherical face being presented to the recess 23 with the lugs 24 disposed in the elongated slot 20. The tool 28 is now positioned on the shaft by presenting the latter through an axial opening 28' thereof. In the present instance, the tool represents a circular saw, one flat side thereof engaging the planiform face of the adjusting collar Ill. The adjusting collar 13 may now be positioned on the shaft and moved inwardly to dispose the planiform face against the saw body and finally the adjusting collar l 2 is arranged upon the shaft, the lugs 24 disposed in the elongated slot 20 and the recess seating upon the spherical face of the collar l2.

The collars l2 and I3 are forced into frictional contact with the saw and with the holding collars M and I5 by screwing the set screws 21 inwardly so as to engage in the keyways 29 formed in the shaft. The points of the set=screws21tend to slide down the'keyways moving the holding collars inwardly along the shaft thus efiectivel tightening the entire assembly.

Angular adjustment of the-saw with respect' to the shaft I is obtained by adjustment of t'he set screws 2 l, and as shown in Figure 1, the lowermost set screw 2| has been withdrawn aTicFth uppermost screw has been moved inwardly such adjustment of the screws effecting a rotary movement of the adjusting collars I2 and I 3' to -tlie left until the lugs 24 enga e respective shoulders I9 with-consequent movement of the saw, the peripheral .edgezof which is :spacedfrom a trans.- verseaxisof the shaft-.10,- andunderirotation of the saw and the tool holder, itwill-beaseenthat the teethiofther saw. will follow individual lines of travel asindicated by (lot and'dash lines in Figure 1, and would-'produce'akerfIM-ina piece of work parallel to the shaft I01 It will be -ap-- parentthat by the adjustment .of the saw inangular relation-with'respecttothe-shaft, the need for setting f the sawteeth is eliminated, as well as .avoidingthe need for specialsawsefor cutting wide grooves'or kerfs.

Obviously, ,various. degreesof tilt ofv the toolcan be obtained quicklyand accuratelyby merely:

adjusting, the set screws 2! .as required, without readjustment of the holding collar,

In. the modified forms of .the deviceshown in Figures 6 to 9, the structure of the holdingandadjusting means is. the same -as-the first. form just. described,-. except that-the holding collars are each provided with .apair. of diametrically opposite disposed set screws 2-1. and the adjuste ing collars l2 and I3 are similarly providedvwith,

set screws ,2 l-.. Also the shaft I Oisshown as having athreaded, end for. mounting ofa nut 3-! In Figure 6, the tool 28" is .adjusted--upon=the-; shaft atright angles thereto. so as to rotate in :a'.. path. concentric thereto, but, obviously: the tool maybeangularly,adjusted with respect to the. shaft by adjustment of the screws 21'. The de.--

gree ofadjustment canbedetermi-ned-by the use.

of a graduated. scale 32,v fixedto ahsupport'not-l shown.

The.,holding collars-l4 andml5 of--F'igure1;7.areillustrated as slightly withdrawn from. thead'juste ing collars l2 and I3 to more clearly, illu'stratethe construction, and also since the tool 28" represents a brush, the body of which is quite thick, the axial opening 33 is shown as of tapered formation, thus defining a reduced bearing contact with 5 the shaft and permits adjustment of the brush to the desired angle.

While I have shown and specifically described the invention, this is by way of illustration only, and" I 'consider'asamy own all suchimo'difications in construction as fairly fall within the scope of the appended claim. Iclaim: I

Meanseforholdin and adjustin a rotary disk tool 'atan angle. with respect to a rotary mount:

ing shaft extended axially therethrough, said nieanscomprising a pair of semi-spherical memberseach having-.a planiform flat face adapted to engage respective sides of the disk tool, each semi-spherical member having an interior passage including a bore at xsaid flat face of a diamter to receive said shaft, oppositepor'tions! otzsaid passage :tapering insan. outward direction, ,tlre'sree mainingiportions ofsaid .passage.= beinggthe same. as said:bore, the tapered :portions; of saidcpassage being relieved to :formshoulders-inwardly; of :the: spherical: surf ace. and to f orm; an elongated islot: oft-said spherica-lesurfaee; .holdingmol lars. removablyc 'securable on the::shaft; each .acoliarchavingi V a semi-spherical; recessi compleinenta'l. to: the

spherican surface of: said semi-spherical bers, said. collars: having lug, members disposed: withinrespectiveelongatedslots for: lioldingpsaidc semiespherical membersagainst rotation'iwith re:-

spect i to the shaft, and- .set screwstthreadedlyrene; gaged in oneof saidcsembspherical"memb'ers texe tended; transverselyi across" th'ectapered portions of 7 said passage to contact said I shaft: at-- dice metrically opposite;sideswandnadjustable tor-move:

saidtsemi-spherical membersan'd said disl'cstool at;

anangleto theshaft.-

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T l ie following refrences' are of record in the. fileof 'tl' iis paten ti UNITED" s'rATEsPA'IENTs'; I

Date;

Number Name-z 15,130-:- Hnttontse .Ju ne L7; 1 856 658,212 Garrison Sept. 418,5. 1900 3 1505?,4-25? Henrikson e- Apr. 1; 1913 1,308,297 Olson 1;; 1919- 1,863,913: Schmidt .June 21, .1 9B2 H FOREIGN PATENTS Number Country Date:

Great Britain Feb? 19,=,1-903

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