US1524555A - Gear wheel - Google Patents

Description

Jan. 27, 1925.

W. H. KEMPTON GEAR mmm.

Filed March 24, 1924 & 7

INVENTOR h/l//ard H. A'e/np ?fo/7.

'WTNESSESZ ATTORNEY Patented .lan. 27, 1925.

UNITED STATES I 1524555 PATENT OFFICE.

WILLABD H. KEMPTON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC Ge MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

GEAR WEEEL.

Application filed March 24. 1924.

To all whom z't may concem:

Be it known that I, VVILLARD H. KEMI- TON, a citizen of the United States, and a resident of Pittsburgh, in'the county of Allegheny and State of Pennsylvania, have 4 invented a new and useful Improvement in ments are particularly desirable because the' metal provides a structure which is not subject to warping. The metal center also provides a support upon which the non-metallic material may be assembled and molded into a workin face having uniform structure and wearn qualities. Such uniform distribution o the molded impregnated material also aids in producing a well balaneed wheel.

Heretofore the hub, web and fiange portions of gear wheels upon which the nonmetallie working face was molded. were made of cast metal and then machined to the desired dimensions. Such centers provided a good support for the non-metallic material, but for certain classes of work they were unnecessarily heavy. Metal centers of lighter material, such as pressed steel, have been used, but the resonance and resiliency of the metal tended to transmit sound from the parts of the machine which were in contact with it. I

M invention is intended to obviate this disad vantage it being among the objects thereof to provide a gear wheel having a light-weight metal center and a working face of molded -laminated material.

Another object of my invention is to provide a gear wheel having a metal central portion which is provided with a nonmetallic member for eliminating resonance and sound transmission therefrom.

In the drawin constituting a part hereof and in which li e numerals designate like parts,

Figure 1 is a plan View of my gear wheel,

and

Fg. 2 is a cross sectional View of my gear whee taken along the line II-II of Fig. 1. .The gear wheel 1 comprises a central Serial No. 701,286.

metal hub 2 having a non-metallic annular ring portion 3 of fibrous material impreg-` nated with a binder such as a phenolic condensation product and molded thereon with heat and pressure. A 'web member of punched sheet metal such as sheet steel comprises discs 4 and 5 which are provided with central flanges 6 and 7 and outer flanges 8 and 9 respectively. The metal web` members are fastened together by any suitable means such as spot welds 10 or they may be held together merely by molding them in the material 3 of the hub member and the material of the working face 11 when the wheel is assembled in the molding operation. Openings 13 are punched in the metal web members in order to lend resilience to the wheeland to decrease the weight;

The outer surface of the hub member 2, the inner fianges 6 and 7 and the outer flanges 8 and 9 are roughened or knurled in order to provide a gripping surface for the moldedmaterial. The annular ring 3 and the working face 11 are composed of fibrous material impregnated with a phenolic condensation product or other suitable binder and are combined with the metal hub 2 and the metal wb .member in a mold under heat and pressure. The gear teeth 12 are cut in theworking face 11 after the gear blank i s molded.

In-assembling the wheel, the metal hub 2 and the web members 4 and 5 are assembled in' the base of a mold which is suitabl Secured in the matrix and molding materia such as shredded duck or paper, or woodflour which has been impregnated with a phenolic condensation product, is placed in the space between the fianges 6 and 7 and the metal hub 2. The working face 11 may be formed by superimposing a plurality of' layers of similarly impregnated duck on the face of the metal rim which is formed by the flanges 8 and 9. The mold is then closed by the plunger and is subjected to heat and pressure between the 'heated platens of a hydraulic press in order to cure the binder and to mold the ring 3 and working face 11 to the desired shape.

This structure provides a wheel having a light-weight, strong, metal support and a non-'metallic working face. ,The working face 11 and the annular ring portion 3 between the metalweb and the metal hub provide a means for eliminating'resonance in eo constituted as to provide a strong the wheel and for reducing the transmis sion of sound from other machine elements in I bodiment of my invention I do not wish to be limited thereto as` 'other methods of `con- 'structingmy gear wh'wl may be employed without de arting from the' spirit of my nvention. v 'Fhe web menber for example;

* may be made of variois kinds of metal or I When constructed of two disks, they. may be employ a le punc'hed disk 'or sevupon w 'ch to 'form the flanges.

united by wel dng' r riveting or by any other" suitable eas.` ther modifications ofmy invention will* suggest 'themselves to those 'skilled in the art without departing from the pirit oi my invention, the scope of which is defined in the annexed claims.

I claim-as my invention:

.-1.' A wheel comprising a working face of molded fibrous materahan inner concentrically formed metal rtion, and a hu; oi molded flillous and 4 w compr 'a wor g faceof b l ded fibrous ml, -an inner formed metal rt'ion, and a 'hub of 'mol ed fibrous material and metal,

said'concentric metal portion co''prising a flange for supporting said workl face, a web and aflange'su'pported by said' ub.

3; A- wheel compris' face of molded. fibroua material' 'an inner concentrically' formed metal web portion,

' and ahb of molded fibrous material and metal, said coneentric metal web portion com two diecs provided with op y extending flanges' moldef i a working' said wor' fce and in the fibvus mate rial of said ub. V

4.A rwheel'conp" a face of molded fibrous a web member, a hub of molded. fibroue ma- &gia; and metal a d or supportng sai wo face en another flange in said web mem for anchoring to the fibrou material of eid hub. 5. A wheel compr' a central hub of meta having 'a ring of rous material molded thereon, a two art metal web member, a flange formed tl ereon 'for anchori in said ring and another flange thereon an v a non-metallic working face supported by said second flange. I

6. A r wheel compris' a central hub of meta having a ring of rous material molded thereon,` a two part metal web member of unched discs of metal united toher, ter'all extending central and outer anges form in said diece and a nonmetallic'working facemolded'on said outer fiange 7. A gear wheel compris'ing a metal center, a metal web, molded material therebetwbeen, and a molded working face on said w 8. A gear wheel comprsng' a metal center, a metal web concentric therewith, molded material 'therebetween, and a molded working face on said web.

9. 'A gear wheel comprisinga metal center, a metal web concentric theewith, molded material therebetween, and a molded working face on said web, those parte of the metal members which are in contact with the molded portions being roughened.

In testimony whereof, I have hereunto eubscribed my name thieth day of March, 1924. i

`WILLARD H. KEMPTON.

in said web mem= working ll metallic

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