US1032537A - Pulley. - Google Patents

Description

H. J. GILBERT.

`PULLEY.

APPLIOATIoN FILED MAR. s 1904.

1 ,032,537. Patented July 16, 1912.

' 4 SSSSSSSSS BM 1.

H. J. (rILBERT.` PULLEY.

APPLIOATION FILED MAR. a. 1904.

Patented July 16, 1912.

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PULLBY.

y APPLICATION FILED MAR. 8, A1904.

1,032,537. l Patented July 16, 1912.

4 SHEETS-SHEET 3.

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COLUMBIA PLANOURAFH Co..w^sH|NaToN. D. c.

H. J. GILBERT.

PULLEY.

APPLICATION FILED MAR. s, 1904.

1,032,587. Patented July 16, 1912.

4 SHEETS-SHBET 4.

COLUMBIA PLANOGRAPH C0'. wAsHlNu-roN. c.

HENRY J'. GILBERT, 0F SAGINAW, MICHIGAN.

PULLEY.

Specification of Letters Patent.

Patented July 16,1912.

Application 1ed March 8, 1904. Serial No. 197,072.

To all whom it may concern: l

Be it known that I, HENRY J. GILBERT, a citizen of the United States, residing at Saginaw, in the count-y of Saginaw and State of Michigan, have invented certain new and useful Improvements in Pulleys, of which the following is a specication.

My invention pertains to pulleys and the like, more particularly to pulleys constructed of sheet metal, and the object thereof is to produce a pulley of this character so constructed and arranged as to-possess the elements of st-rength, rigidity and durability.

The features of improvement and advantage in my present pulley construct-ion will be apparent from the description hereinafter given.

In the drawings, Figure 1 is a side elevation of a pulley embodying my improvements; Fig. 2 a diametrical section thereof on line 2 2 of Fig. 1; Fig. 3 a section on the irregular line 3 8 of Fig. 4; Fig. 1 a section on the irregular line 1 -4 of Fig. S; Fig. 5 a section on line 5 of Fig. 3; Fig. 521 a perspective view of one of the locking plates; Fig. G a sectional plan on line G-G of Fig. 2 with certain parts broken away; Fig. 7 a sectional elevation on line 7 of Fig. 1, Fig. S a modified form of construction as concerns the crown pieces or fillets; Fig. 9 a detail showing the fillet as part of the T- irons; Fig. 10 a section of the interlocking parts at one of the meeting ends of a rim segment showing a modified form of interlocking as to the rim; Fig. 11 a bottom plan view of the parts shown in Fig. 10;

Fig. 12 an elevation of the interlocking parts at one of the meeting ends of a rim segment showing a modification as to the T-iron; Fig. 13 a section showing a modification as to interlocking of the T-iron, spoke arm and rim.

The same letters of reference are used to indicate corresponding parts in the several views.

In the present instance I employ the same general spoke construction and interlocking arrangement between the spoke ends and the rim, as illustrated and described in a prior application filed by me on June 9, 1908, Serial No. 160,730, and therefore I make no claim herein broadly for such features of construction.

Referring to the construction illustrated in Figs. 1 t0 5 of the drawings, the rim of my improved pulley comprises two semicircular halves or rim segments A B, which abut at their meeting ends to form the complete circular rim. The blank for each of these half rims is of somewhat greater length than necessary to form the semi-circular half rim of the pulley, and the extended ends A B are bent inwardly and backwardly parallel with the pulley rim to form sockets or recesses to receive the ends of the spoke arms and thereby interlock therewith as hereinafter explained. The spoke arms CD extend diametrically across the pulley rim and their opposite ends are secured to or interlocked with the meeting ends of the rim segments. The spoke arms are similar, each comprising a curved hub portion forming a shaft bore or opening and two portions extending radially therefrom to the meeting ends of the rim segments. The U- shaped spoke arms, which are slightly separated, are clamped together and upon a shaft (either `directly or through the medium of a bushing) by means of bolts E. In the present instance a separate set of spoke arms F is employed, the particular pulley illustrated and now being described being a wide-faced pulley comprising a rim and three sets of the spoke arms C, D, in addition to the said spoke arms F, as shown in Fig. 2. By preference, a single hub thimble Gr, of the split type, is provided to coperate with the hub structures of all the spoke arms.

In order to adapt the spoke arms C D for interlocking engagement with the ends of the rim sections or segments, the iiattened top of each spoke arm is slit backwardly from its end in such manner as to form a middle tongue and two side tongues c, which latter tongues are bent outward or laterally at right angles to the sides of the spoke arm as illustrated in Fig. 5, while the middle tongue is bent downwardly, all as clearly illustrated and described in my said prior' application. These tongues of the spoke arms are received by and fit into the sockets or recesses of the extended ends o-r inturned iianges A. B of the meeting ends of the pulley rim segments, which flanges are provided with slots c coincident with the parallel sides of the spoke arms to permit the engagement of the tongues of such spoke arms with the sockets formed by the inturned {ianges in the manner described.

In the present instance, I provide for the strengthening or reinforcing of the .rim segments to receive and overcome crushing strains and to this end I provide an interior member or members H which, as shown, ,are T-irons made semi-circular and adapted to fit the interior of the rim andl to be connected to the interlocking parts at the meeting ends of the rim segments. rIhe number of sets of these T-irons employed depends upon the width of t-he pulley rim and upon the strength necessary or desired, and in the present size of wide-faced pulley herein shown I employ three sets of such T-irons. These so-called reinforcing members may in fact constitute the pulley rim structure itself, as hereinafter made apparent, but in the present instance such members have a separate rim structure.

Each of the T-irons comprises an inwardly directed web 7i and a flange L, which latter conforms and is secured to its rim segment by means of rivets or otherwise. As shown in Figs. 3 and el, the web portion of the T-iron is cutl back and is therefore less than a semi-circle, while the flange port-ion therefor continues or extends therebeyond, being slightly less than a semi-circle. Such web portion is thus cut back a sufficient distance so that its ends will rest and fit upon the flattened top of its spoke arm, as is clearly illustrated in Fig. 3. For the purpose of securing the web to its spoke arm, a projecting portion or tongue h3 is provided, which passes through a hole in such flattened top of its spoke arm and is riveted against the under or inner face thereof.

The extended ends of the rims are ma de of such length as to form sockets of sufficient size to receive not only the spoke ends in the manner hereinbefore explained (as well as crown pieces and fillets hereinafter described), but also the extended or free ends of the fiange of the T-iron. These sockets thus formed by the extended ends of the rims are U-shaped and the parts received thereby are tted snugly therein. All these parts are secured together and to the rim in suitable manner, as for instance by rivets h4, passing transversely therethrough parallel to the joint of the pulley, as clearly indicated in Fig. 3.

For the purpose of strengthening and locking the parts and preventing displacement and distortion from strain, a locking plate I, which is shown in perspective in Fig. 5a, is provided at each end of the spoke arms where the parts are interlocked. Each of these plates is substantially rectangular and slightly curved to fit within the ends of the spoke arms. Moreover, each plate is of a length to pass by and overlap the joint between the meeting ends of the rim segments or sections, as seen in Figs. 3 and 4. The plates are secured to the rim segment by one of the same set of rivets h5 which secures the spoke and rim ends together, the particular rivet h4 which passes through the locking plate being, of course, slightly longer than the others. These locking plates alternate, that is to say, the plate shown in Fig. 3 is secured to the upper spoke arm and upper rim segment, as there illustrated, and

lextends downwardly, breaking the rim segment joint, whereas the locking plate at the other end of these spoke arms is secured to the lower segment and extends upwardly, breaking the rim segment joint at such particular place.

The spoke and rim interlocking arrangement, as well as the feature of the T-iron construction hereinbefore described, are applicable not only to narrow and wide-faced pulleys but also to both fiat and crown-faced pulleys. In the present instance I have illustrated a crown-faced pulley and have shown a novel and eHicient manner whereby the crown pieces or fillets are connected or secured to the spoke ends and rim ends. In a wide-faced pulley such as shown in Fig. 2, employing three sets of spoke arms and T-irons, the crowning piece or fillet may be a single piece extending the full width of the rim, but, by preference, as shown in said figure, the same is made of separate strips or pieces, and with such understanding, my method of crowning will now be described. Referring more particularly to Figs. 2, 3 and 'I of the drawings, I interpose between the flanges ofthe T-irons and the inner face of the rim, strips J, constituting fillets of suitable material having a flat inner surface corresponding to the outer face of the said fianges and having an outer surface corresponding to the shape or inclination of the rim at the particular place where it is arranged, all as clearly shown in Fig. 2. By preference, these fillets are less than a semicircle, and therefore do not extend as far as the joint between the rim segments. At each of the meeting ends of the rim segments, two crown-pieces or fillets K are employed, each fillet extending transversely of the rim and being received within the socket formed by the extended end of its rim segment and secured thereto and toits T-iron and spoke arm by the rivets ha hereinbefore referred to. Each of these fillets, as illustrated in Fig. 7, is substantially flat on its inner face and its thickened middle portion tapers or diminishes toward each end corresponding to the inclination of the rim.

Instead of being solid, the crown piece or llets may be made hollow or made of sheet metal J with fianges of the proper heightto form a connection between the outer faces of the T-irons and the crown faced pulley rim, in the manner clearly illustrated inFig. 3 oft-he drawings. In this construction the crowning pieces or fillets J are held in place or secured by rivets j, or in other suitable manner. Furthermore, instead of a single strip or fillet for each rim segment, a series thereof in form of blocks or short sect-ions may, if desired, be used. Moreover, the crowning pieces or fillets may be made or formed integral with the T-irons themselves, as indicated in Fig. 9, and, to this end, the edges of such T-irons have fillet flanges J2 of different widths to correspond with the inclination of the rim, which fillet fianges may be readily formed or rolled on such T- irons. Hence, it will be understood that the crowning pieces or fillets may be separate from or. integral with the T-irons, as may be desired or required; although I prefer that they shall be separate in the manner I` have already described, and consequently, in those claims herein directed to crown-faced pulleys, I do not intend to be limited to either of such particular constructions unless the express requirements of some of such claims distinctly call for the separate piece construction.

In Figs. 10 kand 11, I have illustrated a modification of the interlocking parts so far as the rim and crowning pieces are coneerned, the extended end of the rim in this instance not formingthe socket proper to receive the spoke end or the T-iron, but the extreme end A2 of the rim is extended diametrically inwardly as seen in Fig. 10. This extended end is substantially Tshaped (Fig. 11), with the head thereof fitting in recesses in the parallel edges of the spoke arm in the manner already shown and described in my prior application filed July 6, 1903, Serial Number 164,427. The head of this extended end has a hole through which the outer clamping bolt E passes. The T-iron, in this particular instance, is somewhat longer as to its fiange than that shown in Fig. 3, for in stance, its extended end H', after meeting the extended end A2 of the rim, being bent inwardly and then upwardly to form a socket or recess of sufficient width to receive the end tongues of the spoke. The crowning pieces or fillets (supposing the particular pulley to be crown-faced), are in this instance arranged and clamped between the inner face of the rim and the flange of the T-iron, as in the construction shown in Fig. 3, but the same does not enter any socket.

Rivets 7L serve to secure the rim, fillet, 'T-` iron flange and spoke end together.

In Fig. 13 is shown a form of construction similar to that of Fig. 10, with the exception that the extended end A3 of the rim, instead of being simply bent inwardly so as to lie on a radius of the pulley, is also bent upwardly to form a socket to receive the fillets (supposing that the particular pulley is crown faced), T-iron iange and spoke ends, all of which parts are secured together by rivets 71.7. Also, each spoke end, instead of resting upon 'the'bottom of a socket formed by one or the vprojecting lug ILS from which to form a rivet, and, to enable the extended end H3 of the T-iron fiange to be'bent inwardly as shown, the same has a slot to receive such lug. By heading this lug, a rivet is formed and the spoke arm and the T-iron flange and web are secured together. Furthermore, in this construction the extended arm A1 of the rim is bent inwardly and upwardly to form a U-shaped socket to receive simply the tongues of the spoke arm.

The supplemental spoke arms F, hereinbefore referred to as forming a part of the pulley construction shown particularly in Figs. 1 and 2, the same being a wide-faced pulley, consists of two pairs of arms formed of sheet metal secured at their outer ends to the web of the middle T-iron of the series of three by means of rivets f and at their inner ends to the hub thimble G in the following novel and eflicient manner: The spoke arms are outwardly flanged to form terminals or flanges F', which lit or rest upon the thimble G, as seen in Fig. 2. These iianges have side notches f2, and also a hole to receive a rivet as hereinbefore explained (Fig. 6). The curved or hub portion of the two outer sets of spoke arms fits upon these spoke flanges F, and serve to hold and clamp them to the hub thimble. The outer fianges of the spoke arms bear directly against the hub thimble and form a stop or abutment for the extreme end of the spoke flanges; while the inner flanges thereof likewise bear against the hub thimble except for a out away portion adjacent the spoke fianges or terminals. This cut away portion is of less width than the spoke arm-equaling the distance be tween the notcheswwith the result that the inner flange of the spoke arms fits into such notches. The twosets of spoke arms C, D and F are secured to the hub thimble b v rivets f. By this construction a most efficient and rigid connection and arrangement of spokes is provided and moreover the set of spokes F is effectually locked in place.

It will be understood that the principal features of my invention hereinbefore described are applicable to both the flat rim type of pulley and the crown-faced type thereof, although, in explaining my preferred form, I have chosen to illustrate and describe the crown-faced type. Again, it is obvious thatl the rim may be made of any desired width and also that the number of sets of spoke arms may be increased according to the width of the rim or according to the strength required.

Although I have described more or less precise forms and details of construction, I do not intend to be understood as limit-ing myself thereto, as Icontemplate changes in form, proportion of parts and the substitution of equivalents as circumstances may require or render expedient, and without departing from the spirit and scope of my invent-ion and claims.

I do not herein claim a pulley structure substantially as illustrated in Fig. 3, for instance, but with the rim segments and crown pieces omitted, leaving the reinforcing members or T-irons, if made of the proper width, to serve as rim segments and provide the pulley face, but I have made the same the subject matter of a separate application filed by me on the 19th day of July, 1904, Serial No. 21m-i4.

I claim:

1. A crownfaced pulley comprising crown faced rim segments, spoke arms connected with such rim segment-s, reinforcing members, and crowning means between the rim segments and reinforcing members; substantially as described.

2. A crown-faced pulley comprising crown faced rim segments, spoke arms, reinforcing members connected with the rim segments, and crowning means between the rim segments and reinforcing members; substantially as described.

3. A crown-faced pulley comprising crown faced rim segments, spoke arms, reinforcing members connected with such spoke arms, and crowning means between the rim segments and reinforcing members; substantially as described.

1l. A crown-faced pulley comprising crown faced rim segments, spoke arms, reinforcing members, crowning means between the rim segments and reinforcing members, said rim segments, spoke arms and reinforcing members being interlocked; substantially as described.

5. A crown-faced pulley comprising crown faced rim segments, spoke arms, reinforcing members, crowning means between the rim segments and reinforcing members, said rim segments, spoke arms, reinforcing members and crowning means being interlocked; substantially as described.

6. A pulley comprising rim segments, spoke arms provided with end tongues substantially concentric with the rim segments and reinforcing members arranged on the inner faces of the segments, the meeting ends of the segments and said members having-interlocking connection with the tongues on the ends of the spoke arms; substantially as described.

7. A pulley comprising rim segment-s, spoke arms provided with end tongues substantially concentric with the rim segments and reinforcing members arranged on the inner faces of the segments, the meeting ends of the segments and said members having interlocking connection with the tongues on the ends of the spoke arms, and said members being also secured to the spoke arms; substantially as described.

8. A pulley comprising rim segments, spoke arms and T-irons secured to such segments, the meeting ends of the segments, spoke arms and T-irons having portions inturned upon each other to form interlocking connection; substantially as described.

9. A pulley comprising rim segments, spoke arms provided with end tongues and T-irons secured to such segments, the meeting ends of the segments and T-irons being interlocked with the tongues on the ends of the spoke arms; substantially as described.

10. A pulley comprising rim segments, spoke arms, and T-irons secured to such segments and to the spoke arms, the meeting ends of the segments, spoke arms and T-irons having portions inturned upon each other to form interlocking connection; substantially as described.

11. A pulley comprising rim segments, whose meeting ends are inturned, spoke arms, and T-irons arranged on the inner faces of the segments and having their ends folded to form sockets for interlocking connection with the meeting ends of such segments; substantially as described.

12. A pulley comprising rim segments, spoke arms connected therewith, and T-irons arranged on the inner faces of the segments and having projecting lugs adapted to be received by the spoke arms and to be headed to form rivets and thereby secure the T-irons and spoke arms together; substantially as described.

13. A pulley comp-rising rim segments having their meeting ends bent inward and backward to form sockets, spoke arms provided with suitably shaped ends to engage such sockets, and reinforcing members arranged on the inner faces of the segments and also adapted to engage such sockets; substantially as described.

14e. A pulley comprising rim segments having their meet-ing ends bent inward and backward to form sockets, spoke arms provided with suitably shaped ends to engage such sockets, and T-irons arranged on the inner faces of the segments and having their flanges enga-ging said sockets; substantially as described.

15. A pulley comprising rim segments having their meeting ends bent inward and backward to form sockets, spoke arms provided with suitably shaped ends to engage such sockets, and T-irons arranged on the inner faces of the segments and provided with flanges to engage said sockets, said flanges being extended beyond the stem portions of the 'iT-irons; substantially as de scribed.

16. A pulley comprising rim segments having their meeting ends bent inward and backward to form sockets, spoke arms provided with suitably shaped ends to engage such sockets, and T-irons arranged on the inner faces of the segments and having their flange portions extended beyond their web portions, said extended flange portions being received by the sockets and the ends of the web portions resting upon the spoke arms; substantially as described.

17. A pulley comprising rim segments having their meeting ends bent inward and backward to form sockets, spoke arms'provided with suitably shaped ends to engage such sockets, and T-irons arranged on the inner faces of the segments and having their flange portions extended beyond their web portions, said extended flange portions being received by the sockets and the ends of the web portions resting upon the spoke arms, in combination with means for securing said web portions to the spoke arms; substantially as described.

18. A pulley comprising rim segments having their meeting ends bent inward and backward to form sockets, spoke arms provided with suitably shaped ends to engage such sockets, and T-irons arranged on the inner faces of the segments and having their flange portions extended beyond their web portions, said extended flange portions being received by the sockets and the ends of the web portions resting upon the spoke arms, in combination with means for securing said web portions to the spoke arms comprising rivets projecting from the body of the web portions and entering the spoke arms, and riveted thereto; substantially as described.

19. A pulley comprising rim segments having their meeting ends bent inward and backward to form sockets, spoke arms approximately U-shape in cross-section and provided* with suitably shaped ends to engage such sockets, and T-irons arranged on the inner faces of the segments and having extended flange portions engaging the sockets and having the ends of their web por` tions resting upon the flattened tops of the spoke arms; substantially as described.

20. A pulley comprising rim segments, spoke arms having ends inturned toward the division line of the pulley and connected with the segments, andv locking plates arranged within the spoke arms and secured to the inturned ends thereof; substantially as described.

cured on the inner side of said inturned ends of the spoke arms; substantially as described.

22. A pulley comprising rim segments, spoke arms having their ends inturned to a position substantially concentric with the segments, said ends being connected with such segments, and locking plates also substantially concentric with the segments and also with said inturned ends of the spoke arms and secured to the latter; substantially as described.

23. A pulley comprising rim segments, spoke arms having interlocking connection with the meeting ends of such segments, and locking plates secured to such interlocking parts; substantially as described.

24. A pulley comprising rim segments, spoke arms having interlocking connection with the meeting ends of such segments, and locking plates secured to such interlocking parts, and lapping the joint between the meeting ends of the rim segments; substantially as described.

25. A pulley comprising rim segments, spoke arms approximately U-shape in crosssection and having interlocking connection at their ends with the meeting ends of the segments, 'and locking plates arranged within the ends of the spoke arms and secured to the interlocking parts; substantially as described.

26. A pulley comprising rim segments, a pair of spoke arms approximately Ushape in cross-section and arranged flange to flange, the ends of such spoke arms having interlocking connection with the meeting ends of the segments, and two lockinglplates, one arranged at each of the opposite ends of the spoke arms and lapping the joints between the rim segments; substantially as described.

27. A pulley comprising spoke arms, having their ends inturned toward the division line of the pulley, reinforcing members secured thereto, rim segments interlocked with the spoke arms, and locking pieces secured at the inner side of said inturned ends of' the spoke arms; substantially as described.

28. A pulley comprising rim segments, spoke arms and T-irons secured to such segments, the meeting ends of the segments, spoke arms and T-irons having interlocking connection and also being riveted together; substantially as described.

29. In a crown-faced pulley, the combination of rim segments, spoke arms having interlocking connection therewith, rim resegments, and crowning pieces interposed between said members and rim-segments; substantially as described.

30. VIn a crown-faced pulley, the combination of rim-segments, spoke arms having interlocking connection therewit-h at their meeting ends, circumferential reinforcing members arrangedwithin the rim-segments,

`crowning pieces interposed between such members and the rim-segments, and separate crowning pieces arranged Vtransversely of the rim segments at their meeting ends; substantially as described.

31. In a crown-faced pulley, the combination of rim-segments, spoke arms having interlocking connection therewith at their meeting ends, circumferential reinforcing members arranged within the rim segments, crowning pieces interposed between such members and the rim segments, and separate crowning pieces arranged transversely of the rim segments at their meeting ends and incorporated with the interlocking connections between the spokes and rim-segments; substantially as described.

32. A pulley comprising rim-segments having their meet-ing ends bent inward to form sockets, spoke arms having their ends suitably shaped to engage such sockets, reinforcing members arranged within the rimsegments and engaging the sockets, and crowning pieces also received by the sockets; substantially as described.

83. A pulley comprising rim-segments having their meeting-ends bent inward and backward to form sockets, spoke arms having their ends suitably shaped to engage such sockets, reinforcing members arranged within the rim-segments and engaging the sockets, and crowning pieces received by the sockets and arranged between the rim-segments and the socket-engaging portions of the spoke arms; substantially as described.

Se. A pulley comprising rim-segments having their meeting ends bent inward and backward to form sockets, spoke arms having their ends suitably shaped to engage such sockets, reinforcing members arranged within the rim segments and engaging the sockets, crowning pieces arranged in the sockets between the rim-segments and spoke ends, and rivets for securing the spoke ends, rim ends and crowning pieces together; substantially as described.

35. A crown-faced Vpulley comprising spoke arms, reinforcing members secured to the spoke arms, rim segments, and transverse crowning pieces between the reinforcing members and the rim segments, said spoke arms, rim segments and reinforcing members being interlocked; substantially as described.

p 36. A crown-faced pulley comprising spoke arms, reinforcing members secured to the spoke arms, rim segments, said spoke arms, rim-segments and reinforcing members being interlocked, circumferential crowning pieces between the reinforcing members and the rim-segments, and transverse crowning pieces arranged adjacent the said inter-locked parts; substantially as described.

37. In a crown-faced pulley, the combination of rim-segments, spoke arms, T-irons arranged within such segments, and transverse crowning pieces arranged between the T-irons and t-he rim-segments, said segments, spoke arms and T-irons being intcrlocked; substantially as described. 38. In a crown-faced pulley, the combination of rim-segments having their meeting ends bent inward to form sockets, spoke arms having their ends suitably shaped to engage such sockets, iirons arranged within the rim-segments and also adapted to engage the sockets, and crowning pieces arranged within the sockets and between the l.'-irons and the rim-segments; substantially as described. Y

89. In a crown-faced pulley, the combination of rim-segments having their meeting ends bent inward to form sockets, spoke arms having their ends suitably shaped to engage such sockets, T-irons arranged within the rim-segments and also adapted to engage the sockets, crowning pieces arranged circumferentially of the rim-segments and between them and the `irons, and crowning pieces arranged transversely of the rimsegments between the latter and the T-irons and within said sockets; substantially as described.

40. A crown-faced pulley comprisingrimsegments having their meeting ends bent inwardly to form sockets, spoke arms approximately U-shape in cross-section and having their ends suitably shaped to .engage such sockets, T-irons arranged within the rim segments, and also adapted to engage the sockets, crowning pieces arranged circumferentially of the rim-segments and between them and the T-irons, and crowning pieces arranged transversely of the rim-segments between the latter and the T-irons and within said sockets; substantially as described.

41. A pulley comprising a rim with a substantially central inwardly directed web, a plurality of pairs of main spoke arms connectedwit-h the rim at their ends and having outwardly curved central portions forming a shaft opening, said pairs of spoke arms being arranged in parallel planes at right l angles to the axis of rotation, and pairs of supplemental spoke arms connected attheir outer ends to said web and extending at an angle to said aXis of the pulley with their inner ends connected with the hub portions of the outermost pairs of main spoke arms; substantially as described.

E Mair Y CIK 42. A pulley comprising a rim, spoke arms connected therewith at their ends and having outwardly curved central portions forming a shaft opening, a hub thimble arranged therein, and a supplemental set of spoke arms connected at their outer ends with the rim and at their inner ends interlocked with the hub portions of the first named spoke arms; substantially as described.

48. A pulley comprising a rim, a plurality of pairs of spoke arms connected therewith at their ends and having voutwardly curved central portions forming a shaft opening, a hub thimble arranged therein, and a plurality of pairs of supplemental spoke arms connected at their outer ends with the rim and interloeked with the hub portions of the first named spoke arms; substantially as described.

44. A pulley comprising a rim, a plurality of pairs of spoke arms connected therewith at their ends and having outwardly curved central portions forming a shaft opening, each spoke arm being approximately U- shape in cross-section, a hub thimble arranged within said shaft opening, and a. plurality of pairs of supplemental spoke arms connected at their outer ends with the rim and having flanged inner ends fitting upon the hub thinible, and within the shaft opening of the first named spoke arms; substantially as described.

45. A pulley comprising a rim, a plurality of pairs of spoke a 1ms connected therewith at their ends and having outwardly curved central portions forming a shaft opening, each spoke arm being approximately U- shape in cross-section, a hub thimble arranged within said shaft opening, and a plurality of pairs of supplemental spoke arms connected at their outer ends with the rim and having flanged inner ends fit-ting upon the hub thimble, the inner sides or flanges of the U-shaped spoke arms being cut away to admit the flanged ends of the supplemental spoke arms; substantially as described.

46. A pulley comprising a rim, a plurality of pairs of spoke arms connected therewith at their ends and having outwardly curved central portions forming a shaft opening, each spoke arm being approximately U- sliape in cross-section, a hub thimble arranged within said shaft opening, and a plurality of pairs of supplemental spoke arms connected at their outer ends with the rim and having flanged inner ends fitting upon the hub thiinble, the inner sides or flanges of the U-shaped spoke arms being out away to admit the flanged ends of the supplemental spoke arms, which flanged ends abut against the outer flanges of the U-shaped spoke arms, and rivets passed through the U-shaped spoke arms, flanged ends of the supplemental spoke arms and hub thimble for securing such parts together; substantially as described.

47. A pulley comprising a rim, a plurality of pairs of spoke arms connected therewith at their ends and having' outwardly curved central portions forming a shaft opening, each spoke arm being approximately U- shape in cross-section, a hub thirnble arranged within said shaft opening, and a plurality of pairs of supplemental spoke arms connected at their outer ends with the rim and having flanged inner ends litting upon the hub thimble, the inner sides or flanges of the U-shaped spoke arms being cut away to admit the flanged ends of the supplemental spoke arms, and the said flanged ends of the spoke arms having side notches to receive the inner flangesof the U-shaped spoke arms on either side of the said cutaway portion, to thereby locl the inner ends of such supplemental spoke arms, said inner ends of such spoke arms and the hub portions of the other spoke arms being riveted to the hub thimble; substantially as described.

- HENRY J. GILBERT. Witnesses Gr. E. HIBBEN, Louis B. ERWIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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