US1838783A - Hoist - Google Patents

Description

S. NORMAN Dec. 29, 1931.

Filed Feb. 28, 1930 2 sheets-'sheet Dec. 29, 1931. 5v NORMAN 1,838,783

HOIST Filed Feb. 28, 1930 2 Sheets-Sheet 2 IN VEN TOR A TTORNE Y Patented Dec. 29, 1931 UblTED SIDNEY Noni/ien, or Prrrsenner, Kansas, nssrenon To UNrrED IRoN WORKS,INC.,

or Kansas Grrr, Masson-ni, a consonancia or laissons:

My invention relates to mining apparatus, and more particularly to long wall conveyorsl including hoisting mechanism', the principal object of the invention being to Aenhance fric- .5 tional engagement of Va cable with sheaves of conveying apparatus.

In accomplishing this and other objects of my invention, l have provided improved details of structure, the preferred formsV of 'is which are illustrated in theV accompanying drawings, wherein:

Fig. 1 is a fragmentar matic plan view of lolig wall coal mine equipped with apparatus in accordance with 1s my invention, horizontal walls being broken a-:vay to better illustrate the arrangement of apparatus.

Fig. 2 is a fragmentary tion through the mine.

ne Fig.r 3 is an enlarged plan view of anchor mechanism for the scow-operating cable.

l is an enlarged perspective view of the hoisting scow-operating mechanism.

is a. plan view of the hoist.

Referring in detail to the drawings;

1 designates a scow comprising a heavy metal plate adapted to be moved by a cable 2 to any point across a mine shaft in an undercut channel or recess to be loaded with coal and returned to the center for loading the coal into a car 3 traveling in a trench or v, partly diagramlongitudinal sec* roadway 4 at right angles to the path of theV scow.

rlhe cable moves on horizontally positioned pulleys or sheaves 5 and 6 anchored at each end of the long wall as in ordinary long wall mining practice, and is operated by hoist mechanism including a frame, later particularly described, for operating the scow.

Fixed to the floor of the mine adjacent the frame is tensioned mechanism including a bar 7 anchored to the floor at 8, a pulley 9 .supported by the bar and a` chain 10 running on the pulley. One end of the chainv is fixed to a. yoke 11 on which pulleys 12 and 13 are rotatably mounted, and the other end is enwith a ratchet wheel 14 operable by a lever handle 15, the chain running on the pulley 12 and a branch of the cable being retained by the pulley 13.

Cif

the walls.

Hos'r Application. 'filed February 28, 15530; Serial No; 432,123.

f The frame includes an elongated base 16- yandlaterally spaced vertical walls 17 and 18 fixed to the base for supporting drums or sheaves 19..and 20 fixed to longitudinally spaced parallel shafts 21 and 22 journaled in Y ,A reversible motor 23 mounted on the base at one end thereof is operably connected with the sheave 19 through chains 211 running `on sprockets 25 on projecting ends of the shaft 21. Y

A speed transforming unit 26 of usual construction is interposed between the motorand the sheaves, and includes a shaft 27 journaled in the vertical'walls having sprockets 28 on oppositely projecting ends. on `'which the chains run. 'l j v rlhe motor is connected with the speed transforming unitV through a flexible coupling 29. Y i

rlhe grooves() ofthe sheave 19 are circular and regularly spaced, butvoffset laterally from corresponding grooves '31 inthe periphery of the sheave 20, the first groove of the sheave 19 being spaced from the inner end of the sheave sulliciently to provide an lungrooved area substantially in the vertical plane. ofithe'rst groove of the sheave 20..

"lhe single cable runs back and forth over the two sheaves Vin a mannerthat will vbe parti u'larljf described, whereby the motoractuated sheave 19 moves the cable, and the sheave 2O enforces the Vfrictional engage- -inent of the cable with the operating sheave.

rl`hecable is operated alternately in opposite directions for dragging the scow to and from the depressed roadway, but for convenience in description the cable branch 32 (Figi 4;),will be referred to as an fingoing portion, and the branch 33 as an outgoing portion.-

rlhe cable fruns beneath the sheave 20'and enters the first groove of thesheave 19, passing upwardly rearwardly in said groove, then forwardly and downwardly to the rst groove of the sheave 20, forwardly upwardly over the sheave 20, then rearwardly downwardly to the second groove of the sheave 19. The cable paths are continued back and forth from one sheave to the other, the outgoing portion 33 passing from the sheave 19 preferably without encircling the sheave 20.

The staggered relation of the corresponding grooves in the sheaves thus causes the cable to pass in laterally angular pathsy from one sheave to the other, for preventing frictional contact of cable portions between the sheaves. The frictional engagement of the cable in the sheave grooves is enhanced because of the angularity of the paths to the axes of the sheaves.

Apparatus constructed and arranged as described, may be operated to draw the scow to a desired point to receive Coal, and back to the central unloading point.

The cable is kept in effective frictional engagement with the driving sheave 19 by reason of the tension conferred by the tensioning mechanism, and such engagement is enhanced by passing the cable back and forth over the idling sheave 20. The staggered relation of the grooves in the two sheaves further enhances the frictional engagement of the cable with the sheaves, vand effects lateral spacing of the paths of the cable between the sheaves.

'What I claim and desire to secure by Letters Patent is:

1. A cable hoist including a frame comprising a base plate and spaced vertical walls fixed to the base, spaced shafts rotatably supported by the walls, sheaves on said shafts aving laterally offset grooves for receiving a cable, a sprocket on one of said shafts, a

f speed transforming unit mounted on the plate between said walls and having a. transverse shaft, a sprocket on said transverse shaft, a chain running over said sprockets, and 'a motor mounted on the plate and operably connected with said unit.

2. A cable hoist including a frame comprising a base plate and spacedvertical walls Xed to the base, a pair of spaced parallel shafts rotatably supported by the walls, a

fgrooved idler sheave on one of said shafts, a

riving sheave having offset grooves on the other shaft, a sprocket on each end of the driving sheave shaft, a speed transforming unit mounted on the plate between said walls and having a transverse shaft, sprockets on the ends of said shaft in alignment with the first-named sprockets, chains running over said aligning sprockets, and -a motor mounted on the plate and operably connected with said unit.

In testimony whereof I aflix my signature.

SIDNEY NORMAN.

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