US1469900A - Mjechanical hoist - Google Patents

Description

Oct. 9, 1923.

T. GALLOWAY MECHANICAL HOIST Filed Feb. 23,

1923 2 Sheets-Sheet 1 CONTROL LE/Q I Oct. 9, 1923. 1,469,900

T. GALLOWAY MECHANICAL HOI ST Filed Feb. 23, 1923 2 Sheets-Sheet 2 Patented Oct. 9 1923.v

enome GALLQWA or streams, Wisconsin.

mach nin Horse;

App lieatidri filed reb ary zs; 1923; Serial in). 620,581.

TolaZZ wliom z'tdmay concern V Be it known that L Trroims .GALnowaY,

a eitiZen of the United States, residing at:

Superior, :in the, County of l D ouglas and State of'Wisconsin, have invented certain new and useful Improvements in hlechanical Hoists of which the following is a specification reference being had therein to the accompanying drawing. 7 Y I This invention relates to mechanical hoists and has special reference to a double drum line hoist for use in the art of mining, where what is commonly known as slushing is practiced, that is to sayywhere the mucking in atunn el is accomplished by scraping the muck from theface of the tunnel to a rise or chute, the drag or scraper being operated inboth directions by a single line.

The principal object of the invention is that of producing as simple and efficient a device for the purpose as possible,

(lther objects and advantages of the inventioirwill appear in the furtherdescrip tion thereof. I

Referring to the accompanying drawing forming part of this application in which.

like reference characters indicate like parts: Figured is a top plan view, partly in sec tiou; of the complete hoisting'iinit:

Figure 2 n n elevation of the inner face of one of the hoisting drumss- Figure 3 is an end, elevation o'f the drum farthermost from the motor of the hoist showing specifically the arrangement of brakes therefor: V I p V 7 I Figure i is a combined elevation and sec tion of a modification of the intermittent clutch for the drum: and 4 1 'Figure 5 is an elevation of the clutch head illustrated in Figure 1;

The entire hoisting elements are securely assembled upon a single metal base 1. 2 represents an electric motor, furnishing the power of the hoist, the same being a re versible type of motor the controller of which is illustrated at 3. L represents the armature shaft of the motor which carries the spur gear 5 meshing with the larger with the annular gear wheel 13 which is securely-keyed to the drum shaft S) and pro- *lClGSlOtfltlOll therefor.

Loosely mounted upon the drum shaft 9 arcth'e line'iwindingdrums 14 and 15, they being alike in shape and diameter and preferably provided intermediate of the ends ofQthe hub portionsfwith a felt lubricant. absorbing wasner 16 for the insurance of good-lubrication; Each of these drums has a head portion 17 which is provided with an annular band brake or flange 18 which 0perate in close juxtaposition when the drums are properly assembled upon the shaft 9. Intermediate of the heads 17 of the drun'is and in the space housed by the hand brake flanges is securely fixed to the shaft 9 the drivinghead 19, it being somewhat in the shape of a crankarm carrying upon its free end 20 a horizontally reciprocable dog 21. This dog is for intermittent engagement with first one drum and then the other and forsuch engagement the drum headsare each provided with a series of spaced lugs 22. However'the lugs 'on one drum fa'ce in one direction while the lugs on th'e other drum face in the opposite direction, they each having a flat radially'disposed dog engaging face. The freeend 20 of the driv ing'head 19 is of a' width to just nicely clear the projecting lugs '22, and the dog 21 is approximately the depth of one lug greater in lengththan the width of the end 20 of the working head so that it normally engages either one set of lugs or the other when inaction, The dog 21 is normally held in position to engage the lugs on either one drum or the other by means of a radi ally reciprocable key 28 which is circular, in

form having-a conically shaped upper end which fits within either one or the other of the two notches 2. L- formed in the lower edge of'thedog 21; the key being normally held outwardly by suitable expansive spring 25 upon which it rests. This key, it will be understood, does not permanently prevent the reciprocation of the dog.

From the foregoing it isevident that when the driving head is rotated in either direction it .will be en aged by the inc-lined outer body portion of one set of lugs and forced away from same into engagement with the opposite set of lugs, which engagement will be augmented and insured by the key having access to one or the other of the notches 24 thus normally holding in driving engagement the drum carrying the lugs contacted,

' 'so that when the working head is rotated in one direction it will carry with it one of the drums and permit the other one to operate freely upon the shaft 9 while when driven in the oppositedirection the other drum'will be engaged and the previously engaged one freed to rotate at will upon the shaft. This,

as is obvious, will necessitate the line 26 being wound upon opposite sides of the two drums, that is the line on'one drum will be overshot and the line on the other drum undersl1ot.,'so that as onewinds up the other is free to unwind.

As a means for controlling the rotation o'lparticularly the free drum, a brake band shaft 27 is installed parallel with the shaft 9 and somewhat below same adjacent the outer circumferential flange of the drums, said shaft being journalled in the bearing 28 at one end and in the extension 29 of and 32, each hub having a horizontally projecting arm 33 and a downwardly extending vertical arm 34, and thru each pair of arms thus spaced is mounted a pin 35 to i which one end of each of the band brakes 36 and 37 is attached, for example, one end of the band 36. fastened to the pin 35 between the arms 33 the opposite end of said band being attached about the shaft '27, while one end of the band 37 is attached to the pin 35 in the arm 34 and its opposite end is attached to the shaft 27, so that when the hand lever 30 is moved in one direction, thus rotating the shaft 27, one band will be applied and the other released. When said lever is forced in the opposite direction, the formerly tightened band will be released and the other tightened, or when the lever is allowed to remain in vertical or neutral position, both bandswill be slack.

In this manner it becomes possible when winding up oneither drum to apply the brake to the opposite drum to prevent its unwinding too rapidly.

In the modified form of email shown in Figure 4, I have simply illustrated a collar or clutch member 38 which is splined upon r the shaft 9, the same having a series of teeth r on the opposite faces thereof extending in opposite directions so that when the clutch is rotated by the action of the shaft 9 it will carry with it the drum 39 having teeth which cooperatively lockingly engage with the clutch, as whentheclutch touches teeth normally tending to become disengaged with the clutch the will tend to'flforce'it longitudinally on t e shaft for, engagement with the teeth on the drum which register theremining purposes it is evident that the same may be adapted to other uses.

Having thus described myinvention, what- I claim and desire to secure by Letters Patent, is

1. In combination, a rotatable shaft, a radially disposed driving head rigidly fixed to the shaft, winding drums loosely mounted upon the shaft, one upon either side of the driving head, and a reciprocable do mounted in the free end of the driving head foregoing it is evident that I have remote from, the shaft for alternate engagement with the drums to rotate them posite directions. a

2. In combination,a rotatable shaft, a radially disposed driving head rigidly fixed to the shaft, winding drums loosely mounted in op upon the shaft, one upon either side of the driving head, a reciprocable dog mounted in. the free end of the driving head remote from the shaft for alternate engagement with the drums to rotatethem in opposite directions, and spring controlled means for holding the dog in either of its driving

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