US2374845A - Rotary assembly of interfitting counterparts - Google Patents

Description

M y 1945- 'F. w. TELLKAMP 2,374,845

ROTARY ASSEMBLY OF INTERFITTING COUNTERPARTS Filed April 7, 1944 w at We Patented May 1, 1945 2,374,845 I ROTARY ASSEMBLY OFINTERFITTING COUNTERPABTS Frederick w. Tellkamp, o an; as. a Application April 7, 1944, Serial No.5'29,9 1 s" was. (01. 74- 434) This invention relates to rotors. to rotary bodies and to assembly bodies, in'the class of machine elements; and inasmuch as it is applicable to various uses andmodifications, and consists mainly in theshape of each of its counterpart elements and the assembly of same into the form of a wheel or'rotor, I choose to call it arotary assemblyof interfitting counterparts a i a The main object. of this invention is to provide three substantially. counterpart elements of. suchform. or shape that they are capable of be-- ing-interfittedinto the formof a. wheel, rotor,

pulley, substantially circular magnet, frictional gear, or toothed gear. l

Other objects and important feature are pointed outor impliedin the following description in connection withthe accompanying drawing in which:

Fig. v1 aside-elevation of an assembly es,- pecially..designed for .use as a .triplex magnet mounted on an axle fonrotation. I

tween walls ldl'is substantially equal to the width i of the respective relatively thin portions If; in

Fig. 2 is a sideview of one of the three counterpart metal elements shown interfitted in Fig. 1. Fig. 3 is a lower edge view of the element shown inFig 2.

Fig. 4 is a which the counterpart element areshownas of wood and have their ,arcuate portions adjoined so the periphery is continuous; a modified form of hub alsobeing shown with an axle therein.

F g. 5 isa side elevation of oneof thecounter part elements shown interfitted in Fig. 4.

Fig. 6 is a sectional view'taken along the line 66 of Fig. 5, adjoined to a similar second element for indicating how the width of the peripher'y may be increased for increasing traction, as when used as a pulley or as a ground-wheel.

Referring to the drawing in detail, wherein, similar reference-numerals refer to similar parts throughout the several views, the invention is described in detail as follows:

Since each of the three elements or integral units 1 are not only similar, but are counterparts, they are each similarly identified; and each is substantially U-shaped and consists of an intermediate bar or relatively long portion 1a, and two relatively short arcuate portions 1b that form the magnetic poles when magnetized by any appropriate means (not shown). The barfla of each unit I is diagonally cross-notched at 10 to form pairs of shoulders or walls 1d. These notches terminate at relatively thin portions If, the thickness of which is substantially equal to the depth of the adjacent notch and of each similar notch, while the width of each notch (beside elevationof a modification. in

other words, each notch 1c is equi-lateraland equi-dimensional with the respective inner surfaces of the respeotive thin portions II. Therefore, when interi'ltted"asshown in Fig. 1, each pair of shoulders .or walls ldfit closely against two opposite edges of one of the relatively thin portions 1;: therefore there is mutual interfitting of two relatively thin portions and two pairs of shoulders atea'ch joint between elements 1.

Each notch 1c" is adjacent'toa respective oneofthe arcuate elements lb, and its wall Id are inclinedat about 30 degrees away from'the adjacent portion 'lbj-this being of vital importance in effecting the interfitting of the three elements 1' so as to produ'cea substantially annular'rim'of the portions Ibsupported by the equilateral triangle composed'of'the three bars la; and though it is quite practical to interfit these parts so tightly that they can be iriction'ally or 'clampingly secured together and to fit a shaft of triangular cross-section in the triangular central opening, a more practical safe and economical means of se curing them in their interlockingarrangement is provided in connection with a shaft or axle 8 that. is secured in an externally screw-threaded sleeve 9 whose periphery touches the centers of the three barsla. Two washer Ill-are fitted around the sleeve 9 and against opposite sides of the triangularassemblyfand two nuts H are screwed onto the sleeve 9 and combine therewith to exert a clamping eifect on the flush surfaces of the three-bars 1a. Approximately one-half of the nearer washer and nut is broken away to disclose parts or the farther washer that has other parts indicated in the arcuate dotted line. When this device (of Fig. 1) is magnetized, it is susceptible of many uses such as those of a magneto, makeand-break "rotor, or rotary traction feeder or injector for pushing and pulling metal bars, sheets, strips, cables etc., by contact therewith of its periphery while it is being rotated.

In the wooden devices shown in Figs. 4,5 and 6, the U-shaped elements are shown at l2, their intermediate bars at IZa, their arcuate portions at I 2b, their notches at I 20, their shoulders or walls at l2d, their relatively thin portions. at [2,, and

they have interlapped beveled extensions of the usual function of spokes and hub-connection secured with lue and/or screws I4. For safety,

all screw-heads are countersunk, including those that extends diagonally thereacross and terminates at a relatively thin portion and at shoulders that vdiverge with respect to the adjacent one of said arms, the other end-portion of said bar having therein a notch that extends diagonally arcuate portion adjacent thereto, each notch being 1 of a ,proper width between its adjoining shoulders 'for' receiving and inter fltting with one" of the relatively thin portions or a correlated one of said bars. v

of screws or bolts such as shown at l5 that con-' nect the hub-members 16 to theacentersiof 'the bars lZa. The upper part of the nearer member these two members, especially th'e shoulders'or seats lfia that fit against the middle .jpar-ts' of-the respective bars l2a. A part of one of the bars is broken away at right of the axle H, to show one of the seats Mia more clearly. Any number of holes lzwmaybe proyided to secure gear-teeth in place if desired;

While his essential that'all the elements 1- be substantially or broadly counterparts of one another, it is not essential that they be exact or. absolute counterparts as shown in Fig.1 and the same is tr-uecf the elements '12 ;,for whereas, each of these, elements are here shown with their notches in opposite sidesof the intermediate bar,

it is only essential that one'elementl and one element ll! be thus constructedwhile-each of the correlated U -shaped element =may have both notchesjinthe same side; and while the forrr s shown have advantage of minimum costin'forming these elements, and vin interlocking v themin ically described in the" foregoing, nor to any specific, materials or uses' .for numerous modificationsmay be made within the-scope of the inventive ideas-as implied and claimed.

The following is 'clairnedas my invention:

1, In 'anelement o f ar-rotary assembly, a sub-- stantially U-shaped unit including a relatively,

long intermediate bar-and relatively short arms which latter-t protrude laterallyffrom-the same side andopposite. ends of said intermediate bar and are approximately parallel ,-to one another one end-portion of said bar having therein anotch '2. In the element defined by claim 1, the firstsaidnotch be'ing in the opposite'side of the bar 15- fronithe side in which the second-said notch is I6 i broken off to disclose theconstruction of "I e located,

3. The combination of three substantially counterpartaelements such as defined in claim 1, said .barsbeing arranged in triangular relation ,whilethe'shoulder's of the notches of each bar counterpaitielementsfrhaving bars :such as-defined inrclaim l1, the notches/of each bar being 'in :op

posite asides thereof, said bars being. arranged in triangular relationwhile each bar has its -:end-

portions respectively in front and in rear of-endportions of 'two' of the thre'eaba'rs, the shoulders of the notches ofeach bar 'f'bei-ngengaged with lateral edges of relatively/thin portions of :two

correlated barsof thethre'et 5. The combination of xthreel wst tbstaritial ly 2 counterpartelements-such 'askdefi-nedain claimil,

said'elements "h'aving ltheirf intermediate :bars ar-,

ranged in trianglllar relation while the shoulders of each bar are engaged with the respective iateral edges ofthe relatively po1rtions of"' two correlated substantially eounterpart elements,

and means engagedwith' the middle portions of counterpart elements including bars suck-ins defined inclaim 1,- said'-bars being arranged toiorm an eeuil-ateral"trianglewhile*their-shoul'ders and relatively thin 'portions are interengagedin finterfi-tti-ng" relation, and -mean's -engaged witn the

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