US1687892A - Sheave support - Google Patents

Description

Oct. 16, 1928.

P. K. REED SHEAYE SUPPORT Filed oct. 29, 51927 Patented Get.` 16, 1928.

miren STATES A'Parmi-T oFFIcE.,-

reservar. K. nnen; or' nnennnon, PENNSYLVANIA, ASSIGNOR To ATLAS coNVnYoR ooiviraNY, or PIHLADELEHIA, PENNSYLVANIA., A conformaron or rrruvsvnv aNrA. y *Y sHEAvn SUPPORT.

Y Application filed october 29 192,7. serial No. 229,601.

liu' invention relates to improvements in shes c. supports, and itV has particular' rela'- tion to a sheave supportl of the type whereinV the same is so mouiu ed as to permit the sheave to accommodate itself to the plane and direction of pull of the cable running4v there-y through, and counteroalanced for the purpose .Ji "educine wear on the'cable l io which, while adapted orfa wide variety i' ie .ionly employed in systems for the storage Coal, broken stone and similar commodl'n the use of sheave supports in connection with drag scrapers,'it is desirable thatthe fixed 'posts or other structure upon which the .s-eave supports are mounted be located as close as possible to the edge of the storagel Vleid. whereby the largest possible storage ycit',Y wili be obtained in a given area. 'it so -desirable that the sheave,-as well as lill ible to the center about which-the move- .it take place, thereby to reduce the inertia lcts which occur when sudden changes or' .i 'ty take place.

cipal object, therefore, of my present i- 'ion is to provide asheave support oiE a simple, durable and efficient character, 3iich will permit the sheave to accommodate selll readily to the plane and direction o pull oi' the cable running over the same.' A 'further obi .et of my invention is to provide tructure an arrangement whereby structure may be madecompact, so amountoi: dead area in the storage be reduced to a minimum, when the ners vthe like. A further object'of my i 'i is to eliminate, in a sheave support aracter indicated, the use of a multi- L ty o" pivot pins. A'still further object oit my in ion is to provide inl such a structi. I n gement whereby the inertia Vreduced to a minimum, thus air. will be "Ying the strains upon the structure c tie cabie when sudden changes in angule. place. 1

ine nature and characteristic features of inv invention will be more readily under-A -od from the following description, taken connection with the accompanying drawiorming part hereof, in which:

ition contemplates a sheave sup-k uecs, is particularly adapted for use in con.- ction with drag Scrapersv such as arevcom-l l"aunterbalance, be locatedy as close usedin connection with' dragr` n Figure 1 is a vertical central section of a sheave support embodying the main features ot myA present invention; and'` l Fig. 2 is a top or plan View thereof.

. -Referring'to the drawings, thereA is there shown one `form or embodimentof my inn vention, but it will of course be understood that various changesmay be made in thedetails of the structure without departing from the spirit of my invention. In the formor embodiment shown in the drawings, 5 is a foundation block, preferably` made of concrete or other similar material. Fixedly secured on the top of the foundation blockby Vtwo parts 12 and 13 of the bracket member 114are held together upon, the spherical member means'of bolts 14 and 15 extending through suitable ears. i The line of jointure ofthe ktwo members 12 and 13 is preferably diagonally arrangedasiat 16 (sceFig. 2), whereby they same will not be inthe direct'line of the pull.

f The member 13 is also provided with ears 17` and18, towhich. the` sheave` frame l2), which may be of the usual construction, is secured by'means ofremovable pins Q0 andZl. The sheave 22 is also of the ordi nary type,b e ing journaled on-aspindle 23, whichisv secured bymeansv of nuts `24-fand `25 inl the frame 19. y 'Y f The` member 12 of the two part bracket. 11 is provided with a rearwardly extendingrarm 30, upon which a Weight 31 is adj ustably. mounted. For the kpurpose of securing the weight 5B1-in its adjusted locations, the bar may be provided with a series of apertures 32, and a removable pin passes through a in the art that in the employment of drag scrapers `for storage ot such commodities as coal, broken stone or the' like, there is trequently employed a plurality or foundation blocks or posts at suitable intervals around u the edge ot the storage field, and that the f' same being more or less permanently secured theretofand lett inA place when the sheave structure isv moved from one block or post ,to another.` VFor the purpose of shitting the same, the bolts le and l5 may be removed, whereupon the two part bracket may be sep arated and removed from the spherical memloer 7 and reassembled on a spherical member 7 mounted upon another or the blocks or posts.

yIn some designs 'ot drag Scrapers, the sheave supports, instead of being` shifted from one foundation-block to another, are mounted upon carriages,.which in tnrn are movable about the margin ot the storage field upon suitable track structures. There such arrangements areiemployed, it will ot course not be' necessary to remove the bracket member from the spherical member to change tl e location of the sheave support.

VThe purpose ot'- the pins 2() and 2l to permit the cable to be readily placed over the sheave, orremoved therefrom as occasion may require, it being` readily understood thatby the removal ot the upper/pin QOfthe trame 19 withthe sheave carried thereby ymay be swung downward about the pin 2l asa pivot, rand the cable may then benplaced upon or removed from the sheave 22.

It will -beseen that by the arrangement hereinV described, there will be provided a sheave supportin whichtheisheave may be readily and automatically shifted to the propf er angular position by the pull ot the cable rand at the same time be permitted to conform to the plane thereof; It will also be seen that the centers of the mass o'l the structure on 'each Iside ot`= the spherical member will be as close to the center of movement as is possible in a practical structure, thereby reducingl the inertia effects which tend to destruction vwhen rapid changes in the angular position of the parts take place, particularly in the use of the sheave support in connection with drag scrapers.

Furthermore, this arrange nei-eases ment permits the foundation blocks or other supporting structure to be placed relatively close to the edge of the storage field, and consequently reduces the amount ot dead area of the storage field.

Having thus described the nature and characteristic features ot my invention,l what I,

bracket member, a rearwardly extending," arm carried by said bracket member, and a coun terbalance weight carried rby said arm.

2. A sheavesupportcompri ingspherical member, means -tor `supporti the same, `a bracket member having a portion complemental to and movabl f enegae'ine the s heri-` a, gf) p cal member, a trame carried by said bracket member, a sheave ournaled in said trame, a rearwardly extending arm carried by said bracket member, and a counterbalance weight carried by said arm. Y

3. A sheave support comprisino' spherical member, means for supporting the same, a separable bracket member having a portion complemental to and movably' the spherical member, a frame. carried by said bracket member, a sheave'jrmrnaled in said lrame, a rearwardly extending arm carried by said bracket member., and alcounterbalance wei ght carried by said arm.

il, Asheave support comprising a spherical member', meanstor supporting the same, a two part bracket member having a portion complcmental to and movably the spherical member, a trame carried by kone part ot said bracket member, a sheave journaled Vin said'trame, a rearwardiyextending armcarried by the otherpart ot said b 1acket member, and a cou'nterbalance weight carriedby said arm. n l Y 5. Av sheave support comprising a spherical member, means for supporting the same, a two part bracket member having afportion complemental'` to l and movably veneging the sphericalimember, al frame' car red by one part of'said bracket member, a sheave journaled inpsaid traine, arearwardly extending arm carried by the Iother part ot said l racket member, and a connterbalance weight adjustably mountf-id'on said arm'. f

- In testimony whereof, l signed my name.

' ,Preservar n. anni).

have hereunto

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