Патент USA US2121222код для вставки
A. L. vFREEDLANDER‘ `2,121,2.22 BELT Filed March 27. ,1935 2 Sheets-Sheet 2 2 2,121,222 driven pulley is designated Il and is connected on the shaft I5 to the generatorv I6. 'I‘he generator is fixed by the attaching plate I'I to the car body. The term V-pulley turning on aswivel axis is ‘intended to mean where> said pulley and its mounting move either by a swivel movement; or ' by a movement such as would be obtained when the pulley is mounted on a truck pivoted to a car body, as shown in Figure ll; In the United States 10 and Canada railway truck curves, particularly in yards or stations, may cause the angle between the truck and the car body to be out of alignment as much as 23 degrees. In driving generators, blowers, or other equipment on railway cars, one 15 pulley is mounted on the truck so as to be driven by the wheels of the truck and the otherppulley is mounted on a stationary part oi' the railway car. The present belt will not roll out of the V curves even when the truck assumes a position 20 of as high as 23 degrees with reference to the car body. A V-type belt of a cross section such as shown herein allows the belt to have only a mini mum surface of contact with the sides of the pul ley groove. While normally this would ,be con 25 sidered a disadvantage, yet in the present instance it is a. disadvantage to have any more frictional contact than is necessary to effect the driving and antev ñexible section is square-woven fabric laid on the bias and is designated 2. It preferably con tains a larger amount of rubber, which I have indicated in black. The combination of the in-A creased amount of rubber over that 'found in the tension and compression sections and the bias arrangement of the square woven fabric of the section 2 provides a relatively stretchable section that acts as an accommodating area. between the upper and lower tension and compression sections 10 when they are passing around extremely short centers or there is a lateral swinging of one end of the belt with respect tothe other when used as shown in Figure 11. This relatively yieldable in ternal section 2 permits of short center driving, driving on small pulleys, and of use with pulleys that swing with respect to one another. As this intermediate section 2 is immediately adjacent the neutral axis of the belt where the minimum movement should take place, this intermediate 20 section 2 accommodates the relative movement of Y the compression section. It also permits of the _ cut away portions forming the teeth being «ex tended to a depth vgreater than the depth of the compression section so that the compression sec tion may be comprised, when desired, in reality of a series of compression section teeth held to to prevent slipping, because, in going around a gether by the intermediate bias fabric zone 2. curve, either one side of the belt or the other, ac 30. cording to whether a left hand or a right hand curve is being negotiated, presses very heavily against the side of the pulleygroove, and the belt has to slide up and down along the face of the pulley to take care of the shortened distance.i When the belt is used as shown in Figure 11, it is preferably an end belt, the ends of which are joined, as shown in Figure 12, by a connector. The connector comprises a clamp I8 retained by screw bolts I9 that pass completely through the the belt can not slide freely and would tend to belt and all of its sections. The ends of the con nector at 20 interengage one another by inter lacing in the usual manner and have interposed hang and turn over ,in the pulley groove. The between them the bearing block 2| _and the pintle present belt is so shaped to be thick enough to pin 22. 35 If the side driving faces are of maximum height The details of this connector form no transmit the load but at the same time- it does not ‘ part of this invention and it is merely illustrated .. 4o increase the side driving surface. This added thickness permits the belt to have enough screw strength to permit the use of a connector for connecting the ends of the belt when desired. In the present invention the superimposed lay 45 'ers permit lateral flexibility of the belt without dislodging it from the V-grooves of the pulleys. This lateral lflexibility is accomplished without sacriñce of strength by the arrangement of the several sections of the belt with the woven fabric 50 at angles to `one another. 'The covers additionally provide a‘uniform, smooth, side bearing surface despite the lateral flexing of the belt or the bend ing of the belt. By arranging a large number of layers of fabric embedded in rubber at angles to 55 one another in a series of superimposed planes, it is possible to` provide uniform deflection without bulging, either by lateral movement of the belt or by bending movement of the belt. This is par ticularly true when the belt is hexagonal in cross 60 section as the resistance to bending laterally is primarily in the broadest portion ofthe belt and in the uppermost portion of the belt. In the construction of the belt of this invention, by using the square-woven fabric for the tension to show the adaptability and method of use of this belt. In the manufacture of this belt, the layers of square-Woven rubberized fabric form a sec tion I all wound on one another concentrically; then the same layers of rubberized or rubber imbedded square woven fabric arranged on the bias are wound on section I; and then a -plu rality of layers similar to section I are wound thereon to form section 3. If it is desired to pro vide a cover on the belt, the belt material is cut in trapezoid or hexagonal section and the cover is wrapped thereon. yIf it is desired to form teeth on either the upper or under side of thev belt, or both, the material is sheared away to form the teeth either before or after the cover is applied. ' It will be understood that I desire to compre hend Within my invention such modifications as may be necessary to adapt it to varying condi tions and uses. y I claim as new and desire to vsecure by Letters Patent, is: and compression sections, relatively incompressi 1. In a V-shaped power belt, a compression section `comprising a pluralityv of- rubberized ble bodies so far as lateral compression -is con square-woven fabric layers, an intermediate sec cerned, are provided, while the greater length of the belt as compared with the transverse dimen sion, will provide sufilcient compressibility and 70 extensibility of vthe sections to constitute tension and compression sections. , The neutral axis area 00 Having thus fully described my invention, what tion comprising a plurality of square-woven bias fabric layers embedded in rubber, and a tension section comprising a plurality of square-woven rubberized layers of fabric, said intermediate 70 section being disposed between and adiacenti said compression section and'said tension section. is in the lower layers of the tension section. This arrangement is made possible by 'the use of theintermediate, more highly flexible section rubberized square-woven fabric layers arranged joining the other two sections. This intermedi with the threads parallel to the longitudinal and 75 2. In a. V-shaped power belt, a ‘plurality of . Y > ` „ Ä _ amaca` - transverse axes of the belt; an intermediate rela tively iiexible area comprising square-woven fabric laid on the bias embedded in rubber; and « a tension section comprising a'plurality of fabric layers rubberized, arranged in the same manner as the compression section, said intermediate sec „ tion being disposed between and adjacent said compression and tension sections. said intermediate section and opposite said outer section comprising a- pllll‘ality of square woven layers of rubberized fabricarranged with the threads parallel to the longitudinal and trans verse axes of the belt, and an enclosing cover' of rubberized _fabric on said belt surrounding said sections. _ 3. In a V-shaped power belt, a compression 10 section relatively stiff andlinextensible, an inter mediate section relatively yieldable and extensi ble, and a tension section relatively stiff and Y 8. In a belt, an intermediate section compris ing a plurality of square Woven fabric layers ar ranged on the bias and Vimbedded in rubber, an outer section disposed adjacent said intermediate section comprising a plurality of layers, of square ‘ inextensible and including therewithin the neu woven rubberized fabric `with the threads arranged parallel to thelongitudinal and transverse axes of trai axis of the belt, said intermediate -section being disposed between and adjacent said com pression and tension sections, I3' verse axes of the belt, an inner sectionadjacent - _ the belt, an inner section adjacent said intermedi- . _ 4. In a V-shaped power belt, a compression section relatively stiff and inextensible,- an inter mediatesection relatively yieldable and extensi ate section and disposed opposite said outer sec tion comprising a plurality of square woven layers of rubberized fabric arranged with the threads ble, and a relatively stiff andV inextensible ten- _ _ sion section -including "the neutral axis of the belt, said sections comprising fabric and rubber vulcanizedto one another and being arranged with the intermediate section between and ad jacent said compression and tension sections. k5. 1n a V-shaped power belt,_ a compression section relatively stiff and inextensible, an inter parallel to the longitudinal and transverse axes of the belt, and an enclosing cover of rubberized Afabric on~ _said belt surrounding said sections, 4said cover/comprising an inner U-.shaped cover en closing the inner surface and side walls of the belt and an outer cover enclosing the inner cover ` and the outer surface of the -belt. ' 9`. In a belt, an intermediate> section compris- I mediate 'section relatively _ yieldable and extensi ble, and a relatively stiif and lnextensible ten 30 slonsection having the neutral axis of the belt ing a plurality of square woven fabric layersarranged on the _bias and imbedded in rubber, ~ an outer section adjacent said intermediate sec 30 disposed therein, said sections comprising fabric tion comprising a plurality of layersof`> square and rubber vulcanized ‘tò‘one another, the _inter woven rubberized fabric with the threads ar- ` mediate section having a larger amount of rub- ' ranged parallel to the longitudinal and trans ber and fabric laid on the bias while the tension verse axes of the belt, an inner section< adjacent vsaid intermediate section and disposed lopposite 35 woven fabric arranged with the threads parallel said outer section comprising a plurality of square _to the longitudinal and transverse 'axes of the woven layers of rubberized fabric »arranged with belt and are disposed adjacent the intermediate the vthreads parallel to the vlongitudinal and trans 35 section and the compression section have square section and at opposite sides thereof. #lo __ 6. A belt comprising superposed, compression, intermediate, and tension sections and an en verse axes of the belt, and an enclosing cover of rubberized fabric on said belt, said belt having 40 teeth formed in one of said- sections comprising ' ` 'closinglwrappen said compression and` tensionV . square woven rubberized fabric with the threads sections being disposed adjacent said intermedi _ arranged parallel to the longitudinal and trans ate section at opposite' sides thereof and com-` verse axes ofthe belt. ' prising a plurality of layers of square woven 10. In a. belt, an intermediate'section compris 45 45 fabric with the threads arranged parallel to the ing a plurality of square woven fabric layers, ar ‘ longitudinal and transverse axes of said-belt, said ranged on the bias and imbedded in rubber, an - intermediate section comprisingV a plurality of outer section adjacent said intermediate section _ layers of square woven fabric embedded in rubber comprising a plurality of layers of square woven ‘rubberized fabric with the threads arranged par 50 allel to the longitudinal and transverse axes of of the belt disposed therein, saidA wrapper;y com the belt, an inner section adjacent said inter prising an inner U-shaped cover enclosing the mediate section and disposed opposite said outer " inner wall and side walls of the belt and an outer section comprising a plurality of square woven cover _enclosing the inner cover and the outer layers of rubberized fabric> arranged with the wall of the belt, said belt having formed in one threads parallel to the longitudinal and transverse of the outer sections 'thereof teeth comprising axes of the belt, said belt having teeth formed alternate recesses and projections, and said in one' of said sections comprising a "plurality of wrapper providing complete coverage of the ex layersof square woven rubberized fabric with terna! surfaces of said belt. ' the threads arranged parallel to the longitudinal 60 "1. In a. belt,l an intermediate section compris and transverse axes of the belt, and an enclosing ` and having `Vthe threads thereof arranged on a 50 bias, said tension section having the neutral axis ing a plurality of square‘woven fabric layers> cover of rubberized `fabric on said belt, said cover arranged on >the bias and imbedded in rubber, comprising an inner U-shaped cover. member en an outer section adjacent said intermediate sec closing the inner and side walls of the belt, and tion comprising a plurality of layers of square an outer cover member enclosing said inner cover 65 woven rubberized fabric with the threads ar member and-the outer surface of the belt. « ranged parallel to the longitudinal -and trans ' _ABRAHAM L. FREEDLANDER.