US1457071A - Metal pulley - Google Patents

Description

May 29, 1923.

H. J. GILBERT METAL PULLEY Filed April 5, 1921 s Shets-Shet 1 May 29, 1923.

. mswm H. J. GILBERT METAL PULLEY Filed April 5, 1921 '5 Sheets-Sheet 2 3mlumnnmuuullnmm' f i; lg llllllllllllllli! Ma 29, 1923. 1,4s7-m1 H. J. GILBERT METAL PULLEY' Filed April 5, 121 3 Sheets-Sheet 5 Patented May 29, 1923.

mu: meme see icm itle eii e16 TUBING COMPANY, or SAGINAW, MICHIGAI\T,' A conronnrron or MICHIG METAL PULLEY.

Application filed A ril-5, 1921i" Serial noli'sacsi ToaZZ' whom'it'maycomer n:

Be it knownthat I, HENRY J. GILBERT, acitizen of the United States, residing at Saginaw, inth'e county: of Saginaw and State of Michigan, have invented certain; new-and useful-Improvements in Metal -Pulleys,ot which the'following is a specification.

invention relatesto metal pulleys and theobject thereof is todevis'e asimpleand efficient constru ction ot such a pulley 0f the split type characterized 7 more i particularly by the provision "of clamping means and centering means which are independent of each-"other. The construction suchthat when the two-halves of the pulley are'place'd upon "the shaft the centering means are in positive contact either direct or indirect v with the'shaft and-the rim sections are in positivebontactwith each other; with the result -that, when the clamping means are operated to clain the pulley structure on to; theshaft, the two halves cannot be drawn out of theirtrue position with respect to theshaft. At the same time the continuous compression on the shaft due to the clamping-meansincreases the compression of the Y two halves towards one' 'another and gives added support for the pulley structure upon the shaft Other'novelandadvantageousfeatures of" 7 surfaces completely closing the ends oftlie construction such as lightness, strength and ease of putting the pulley structure on and oi the shaft will be apparent from the descriptionhereinafter given. V

The inventive idea is capable'of being embodied in a variety of mechanical structures some of-which, for the purpose of illustrating the invention, are shown in the accompanying drawings, but it'is to be expressly understood that such drawings are for the purpose of illustration only and are" not designed to definethe limits ofthe in-' vention, reference being had to the appended claims for this purpose.

In the drawingsFig. 1 is an end elevation of a pulley structure embodying my invention in which'the centering means indirectly contact; and F 19;;- 1 is; a like end elevation of a pulley in which the centering means contact directly with the shaft; Fig. 2 a section on' the line 2 2 of Fig. 3; Fig. 3 a sec tion on-thelin'e'3 3 of Fig.2; Fig. 4 a. sec tion on the line 44: of Fig.3; Fig: 5 an 'ele-' vation of a bushingg-Fi ro a section on the line 6- .6 not Fig. 7 a-section on the line' 77 ofgFig 6: 'FigmS a section 'on'the" line 8-8 of Fig.7;vFigs. 9,510, 11', 12 and 1% are sectional views illustrating".other 5 formsof the invention and. Fig. 13 'is" an en'd 'view ofFig: 12.,

Referringto the particularembodiment as shown as-in Figs. 1, and: 4,.the' pulley which is of the split type comprises twopulley halves,each-'consisting ofa rim section radial webswhich are here connected with the 'end edges of the rim sectionsla'ndi a tra ii sverse' web which 'is substantially diat-i metrical; and' also consisting'iof' clamping means? The end webs constitute the' centeringmeans which are independent of' the:

clampingemeans. As" shown :each pulley half is an integral casting or "structure, tut

invention in its broader aspect is not Iieces sarlly limited to such a' structure inasmuch as it may be built up of different or separate Parts o produce the final structure." I

Assh'owii' each pulley half comprises a" semr-circular rimsecti'on 1', two parallel and radialendr webs Q'and transverse or dia-" metrically I disposed webs consisting of the twoflat portions :3. an'dthe central subs'tan tially semi circular' "portion 4, adapted to fit' upon the shaft A: In'the presentinstance:

the webs-*2 "form substantially radial smoothv pulley except forthe shaft'opening5' with the result that the lodge'm'ent or accumulating" of dust, dirt. or lint is impossible on'or'in' the' pulley; The inner adjacent edgesof the rim sectionsof the two pulleyhalvesfand also the inner adjacent edges of the webs 2 butthej'transvers e 'or diametrical' webs *3 shown inFigs ""3 4 the portib nsig are parallel to thedianietricalline of the split'of are in po'sitive'contact with each otherwhen; the two pulley halves are brought together,

the pulley and are located'o'n either side of such line": n V x The inner adj acent edges of the webs "2.

are notonly in positivecontact withfeach other, but they also make contact with the shaft either indirectly through the bushing 5, F 1; or'dii ectlywith the shaftas "shdwn The bushing which is of the split type comprises two semi-circular portions 5 having radial lugs 6 which are adapted to be received in radial openings 7 in the central portion 1 of the transverse webs. It will be understood, of course, that the bushing 5 may be omitted and the pulley clamped directly to the shaft as shown in Fig. 1

The clamping means herein shown for receive a wrench or other tool whereby such bolt can be screwed or unscrewed in the assembly and disassembly of the pulley. Inasmuch as the transverse webs are not in contact but separated a certain distance as shown in Figs. 2 and 3 and are moreover" resilient, the same may be sprung: toward each other by means of the clamping bolts and the pulley halves are thereby securely clamped together and on to the shaft A.

In practice, in the manufacture of this construction of pulley, the two halves are first clamped together with a slight strain thereon, whereupon the central opening through the pulley (minus the bushing) is accurately bored out to the same diameter as the shaft to which the pulley is to be applied. During this boring operation the transverse webs are preferably sprung towards each other, so that when the pulley halves are relieved of the clamping pressure the central opening is somewhat out of round. In the case of the bushing the same is turned on the outside to a true circle and is bored on the inside to a true circle concentric with the outside. As a result, when the pulley is actually applied to its shaft and clamping bolts are operated, the pulley halves are brought solidly together with the end webs in contact with the shaft and acting as a centering means and with a resilient clamping pressure due to the clamping means acting independently of the centering means.

The ulley illustrated in Figs. 1 to 4 is ofsmafl size and therefore has a single set of clamping bolts. However, this pulley structure may be made of different sizes, that. is of difierent widths and zdiameters. ,For instance in Figs. 6, 7 and 8 I have shown my invention as embodied in a pulley of wider face or rim than in Figs. 1 to a inwhich case the number of clamping bolts is increased, being increased in the present instance to two pairs of such bolts 8. In other respects the construction is the same as that above described.

In Figs. 9 and 10 I have shown a modified form of construction as to the clamping bolts 13 which are here provided with nuts 14 retained in'a side pocket 15 in the web portions 3, each bolt thus engaging its nut 14; instead of engaging a screw threaded bore in suchweb portion.

In the above described embodiments the centering means are webs connected with the end edges of the rim sections but in the broader aspect of my invention the centering means may be otherwise constructed and otherwise arranged as shown in Figs. 11, 12 and 13. According to the structure shown in, Fig. 11 the centering means consists-of radial webs 16 having central hub openings 17 such webs being connected with the rim sections at points within the line of the edges of such sections. In other respects the construction is the same as shown in Figs. 2 and 8. 1 Y

Referring to the construction shown in Figs. 12 and 13 the centering means consists merely of one set or pair of Webs which moreover are arranged at the central portion of the pulley structure with a set or pair of clamping means arranged on either side and axially thereon. The centering means here consists of the webs 18 having central hub portions 19, such webs being connected with the central portion of the rim sections. The clamping means comprise transverse members 20 which are spaced apart and, are somewhat resilient and are clamped together by means of the bolts 21.

Fig. 14 illustrates a construction according to which the transverse web portions 22 corresponding to the web portions3 instead of being connected directlywith the rim sections are here shown as connected directly with the sides of the webs 2 along the lines 23. In other respects the construction is the same as shown in Figs. 2 and 3.

I claim:

1. A metal pulley adapted for use on a shaft and formed in two halves, said pulley comprising rim sections, means clamping the pulley on the shaft, and automatic centering means resisting the distorting action on the rim when the clamping meansare applied, whereby clamping and. centering are simultaneously effected.

2. A metal pulley adapted for use. on a shaft and formed in two halves, said pulley comprising rim sections, means clamping the pulley on the shaft, and automatic centering means connected to the rim sections and supportmg the same against the distorting strains of the clamping means, whereby clamping and centering are simul-l taneously effected.

3. A metal pulley adapted for use on a ing'action 011 the rim when the clamping means are applied, whereby clamping and centering are simultaneously effected.

4. A metal pulley adapted for use on a shaft and formed in two halves, such pulley 1 comprising rim sections, clamping means including resilient webs and clamping bolts cooperating therewith, and centering means sustaining the rim sections against the strains imposed by the clamping means.

5. A metal pulley adapted for use on a shaft and formed in two halves, such structure comprising rim sections, centering means fitting positively on the shaft and acting to center the pulley sections on the shaft in advance of any clamping action, and clamping means normally spaced from the shaft and capable of being applied to clamp the pulley to the shaft without disturbing the centering means.

6. A metal pulley structure adapted for use on a shaft and formed in two halves, such structure comprising rim sections, clamping means, and centering means cooperating with the shaft for centering the pulley thereon, said centering means including pairs of webs on opposite sides of the clamping means and having hub portions bearing on the shaft and acting to resist any non-centering strains incident to the clamping action.

7. A metal pulley structure adapted for use on a shaftand formed in two halves,

such structure comprising rim sections,

clamping means connected with said sections andclamping the shaft, and centering means comprising radial webs connected to the rim sections and having hub-portions bearing on the shaft and resistingany deforming strains applied to the rim sections by the clamping means.

8. A .metal pulley structure adapted for use on a shaft and formed in two halves, such structure comprising rim sections, clamping means connected to said sections and cooperating with the shaft, and centering means connected to said rim sections 1 and cooperating with the shaft, said centeringmeans comprising webs having hubportions fitting on the shaft in advance of the clamping action, and said clamping.

means comprising diametrically disposed webs with central openings for the shaft, and clamping bolts, the bolt of each pulley half connecting its rim section with the diametrical web of the other-pulley half. v

9. A metal pulley which is split into two halves, each half comprising a rim, parallel webs extending radially from the. edges of the rim, and a web extending transversely and connecting the opposite ends of the rim, and means cooperating with the transverse webs for securing the two pulley halves =tother.

halves, each half comprising arim, parallel webs extending radially from the edges of the rim, and a web extendingtransversely and connecting the opposite ends of the rim, and means for securing the two null'ey halves together consisting of clamping bolts each anchored in a rim andpassingthrough its transverse web and engaging the transverseweb of the other pulley half.

11. Ametal pulley which is split into two halves, each half comprising a rim, parallel webs extending radially from the-edges of the rim, and a web extending transverselyand connecting the opposite ends of the rim,

said transverse web consisting of a central semi-circular portion and two flat portions connecting the opposite ends of the rim and arranged parallel to and inwardly of the diametrical line of split of the pulley, and means for securing the two pulley halves together. v

12. A metal pulley which is split into two 10. metal pulleywhichis spli't'into two.

halves, each half comprising a rim, parallel webs extending radially from the edges of the rim, and a web extendingtransversely and connecting the opposite ends of the rim, said transverse web consisting of a central semi-circular portion and two flat'portions connected with the rim and arranged par allel to and inwardly of the diametrical line of split of the pulley, and means for securing the two pulley halves together consisting of clamping bolts engaging respectively the pulley rims and the flat portions of the web.

13. A metal pulley which is split into two halves, each half comprising a rim, parallel webs extending radially from the edges of the rim, and a web extending transversely andconnecting the opposite ends ofthe rim, and means for securing the two pulley halves together, the adjacent edges of the rims and end webs being in contact when the two pulley halves are secured together, and the two transvers webs being separated and out of contact with each other. v

14. A metal pulley which is split into two halves, each half comprising arim, parallel: webs extending radially from the edges of the rim, and a web extending transverselyand connecting the opposite ends of the rim, and means for. securing the two pulley halves together, the two transverse webs being resilient and separated from each other vbut adapted to be drawn towards eachother, and

clamping means cooperating therewith,

15. A metal pulley which is split into two halves, each half comprising a rim, parallel webs extending radially from the edges of the rim, and a web extending transversely and connecting the opposite ends of the rim, said Web consisting of a central semi-circular portion and twoflat portions connected with the rim and arranged parallel to and inwardly of the diametrical line of split of the pulley said central portion of the transverse web forming a central shaft opening when the pulley heives are together, a split bushing in said central opening, and means for clamping the pulley halves together, the openings in the transverse Web being out-ofround when the pulley halves are not clamped together but in-round when clamped together.

16. A metal pulley whichis split into two halves, each halt being a closed integral structure comprising a riIn and parallel WQlJS errtenclin radially from the edges of the rim, and a Web extending transversely and connecting the opposite ends of the rim, and means for securing the two pulley halves together. p V

HENRY J. GILBERT.

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