US848287A - Hoisting apparatus. - Google Patents

Description

PATENTE) MAR. 26. 190'?K V, R. BROWNING. HIST'NG APPARATUS.

APPLICATIGN FILED MAY 10, 1904.

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No. 848,287. PATENTED MAR. 26, 1907.

Y. R. BROWNING. HUISTING APPARATUS.

APPLIOATION FILED MAY l0, 1904.

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Unirse HOISTNG APPARATUS" Specification of Letters l atentmeenten March es, 190.

Application filed May 1.0.1904. Serial No. 27,22l`.

.To all whom/it muy concern:

Be it known that I, Vieron R.- Bnowxixe, a citizen ot the Ijnited States, residing at Nottingham, in the county of Cuyahoga and`- State of Ohio, have invented a new and useful Improvement in IIoisting Apparatus, ol which the following is a specification.

This invention relates to hoisting apparatus, and has particular reference to the i Io druins and their driving mechanism which lare employed for operating clam-shell or orange-peel buckets. In the operation ol a bucket of such a character it is necessary lo completely close the saine before it is hoisted.

x 5 and to hold it closed while it is beine; hoisted and moved to the desired point for dumping.

, It is the object of my invention to siniplify the mechanism and to add toits safety and eiiciency, which I do by so combining 2o mechanic al brakes with the hoistingt mechanisin that the entire device can be controlled by a single reversible electric motor, which is itself controlled by a single lever. The brakes are of sufficient power to hold the g3 bucket with its load suspended in any position, and it can be lowered only by positively driving the motor in a reverse direction. Thus the load is always under complete con-y 4trol of `the motor,wvhiclrinust be driven to 3o either hoist or lowenthe saine, and if the niotor is stopped the load also comes to rest.

In the accoinpanying drawings, forming part of this application, Ifigure. l is a plan View of a trolley provided with my invention; and Iig. 2 is a side elevation of the saine, showing the bucket.

ySimilar reference characters represent corrcspoinlingy parts throughout the several views of the drawings, in which- Ircprcsents the trarne of the lriilley, upon which are journaled the axles 2, that carry the wheels 3, that run back and forth upon the tracks 4.- While I have shown my invent ion as applied to a movable trolley, it is by no nmeans so limited in its application, as it may bc mounted upon a stationary structure, upon a liiconiotivc-irane, or upon numerous other ructures and devices.

, 5 is an electric motor that is neared to one 5o oi'thc axles 2 throughthc pinion (i and lfear 7.- l"By this means the axle is turned and the trolley moved back and forth along the tracks,

c5 is a bucket-closing drinn, and l) the dumping-drum. which for convenience .and by preference is made in two paris, said parts being' on the saine shaft with and separated by the lnicket-closing drum S. The bucketclosing' cable 10 is secured at eac-h oi its ends 3 to the drum near its end flanc-es, and at its center it is secured to a drum il, that is carriedby the closing-arms et' the bucket l2. Ot course instead ol a single cable secured at its center a pair ot' shorter cables secured ai their opposite ends to the drums 8 and Il may be employed. lfig. 2 shows, the bucket suspended and closed, and 'from it it will be seen that the cable lOis passed about the drum Il before it is secured thereto, so that theweigght ol' the bucket will tend to turn and. lift the drum. ris stated, this drumv is carried by the arnis oi the bucket, and as it is lifted these arms are swung so as to close the bucket, which will be held closed as long,` as the weight of the same is sustained by the cable 10. In order to multiply the power which' the weight exerts toward closing the bucket, the drum is veryin'uch reduced in diameter at each of its ends, as shown at 13 13, and upon these portions are Wound chains 14 ends to the drinn and at their upper ends to the Aframe 15 et the bucket. The chains andthe directions, so that as rone unwinds therefrom the other will be Wound thcreabout. y this it will be obvious that the pull upon the cable l0 will exert a much stronger pull upon the chains, which pull-being sustained by the closing-arms of the bucket will hold the latter in a closed position. rl`his type of bucket being well known in the art, it is not thought necessary to illustrate or describe it further.

The bucket-dunipincu cables, which are shown at IG, are secured at one ol their ends to the two parts oi the dumping-drinn 9 and at their other ends to the frame i5 of the bucket. The points ol attachment ofthe cables to the frame are separated for a distance substantially equal to the distance between the parts of the drum 9, so that the that the bucket will not rotate when it is suspended.

'lhe drums 8 and l) are suitably geared with and driven l'roni a motor 1(30.` Both of thc niotors 5 and 1G() are controlled by means located in the opcrators cage 19, said cage beiner carried by the trollcydramc 1.

The shal'tz() ol the motor 160 is provided on its inner end with a pinion 21,which i4, said chains being secured at their lower cable are wound upon the drum in opposite From IOC

cables will wind properly thereon and sov ol levers i7 and 18, respectively, which are IIO meshes with and drives a gear-wheel 22, which is loosely mounted on a longitudinal shaft 23, that is journaled on the trolleyirame at 24,-. 25 keyed thereto, said pinion meshing with the gear 26 on the drum 3. The shaft 23 also carries intermediate the geen 22 and the pinion a gear-wheel 27, which meshes with and drives a similar gear 23, that is carried :o by the shaft 29. The gears 22 and'27`are rigidly connected together, and .both turn looseiy on the shaft 23. vThe shaft 29 drives e gear 3Q, that meshes with and drives a similar gear 3l., that is loosely mounted on one i 5 end of shaft 32, on the other end of which is,

keyed e pinion 33, that meshes with and drives a gear 34 on the righohand portion of the lumpingdxum 9. The shaft of the dump ingdrurn is jcarini-led,` at in the trolley- ;o frame, and the said drum is keyed orothersecured thereto, so that the two parts ci the drum turnltogether. lThe bucket-closing. drum 3, however, 1s mounted loosely on the l said drum-shalt and turns independently e 5 thereof. From this description itwill be understood. that when the gear 22 is driven power will be transmitted directly to the dmm 8 Vhreiigli the pinion 25 and gear 26 and indirectly'to the drum 9 through the gears 27, 28, 3o 3G, 3i, 33, and 34.

- 'inasmuch as the cables wand 16 must be run or wound 'on their respective drums the sarneepeed, it is necessary that the drums Abe 3 5 .fyi/'eloeityJ and il they are of the same diameter,

as shown the 'moet be rotated at the same speed. Viiorimiereason the ears 26 and 34 are made of thasaine size, an the same may lhe of the pairs of pinions 25 and 33 and so 'the pairs of gears 27 and 31 and 28 and 30.

Mounted upon the shafts 23 and 32, be-

tween the gear 27 and pinion 25 and the gear 3l and pinions 33, respectively, are mcchanical friction-brakes or safety lowering de- 4.5 viees 3@ and 37. These brakes are known in the art, and they may be sulliciently described by stating that they comprise three members 33,39, and 40, the members 38 and 39 being loose upon the shafts, while the 5o members 40 are keyed thereto, so as to be capable ci slight lateral motion. The pinions 25 and 33 are keyed to their respective shaits. Thrust-collars 41 are arranged 'on these shafts outside the gears 22 and 3l and their corresponding friction-brakes 36 and V37. Fihe members 38 and their cooperating' 27 and 3l are provided with matched helical surfaces, and all the members 3S, 39,

and Il() are provided with frirtional surfaces 6o on their adjacent faces, so that when they arc forced tightly together, they will turn in one direction as one piece or he held against rotation in the opposite direction, except as the motor 16d is driven hackwardly, when the member 40 is permitted to turn. The pe- At its inner end this shaft has apinion given the same circumferential' l'ber and la' traveling nnt'-such, for"example`,

ripheries of the members 38 and 39 are formed with ratchet-teeth, with which engage detentf. pawls (not shown) t'o prevent rotation ofthese parte in. the reverse direction. Havin thus Y described these, parte, it may be state that '7o when the gear 27 is driven forwardly the I helical surfaces on the gear and its coperating member 38 are. cammed apart and-the, frictionfeurfaces of the members 38, 39, and 40 are so jammed together that' the shaft and; 1'5 the pinion 25 are also turnech The shaft 32 and its pinion 33 are likewise turnedthrough: the friction-brake 37. The amount otffric' tion between the members is always sufficientv to hold the shafts against' reverserotation, exce twhen the motor is driven backwardly whic movement tends to separatethe helical surfaces and loosens the pressure betweerh the members' so'that themember 40, and thaf `'shaft to which it keyed may turn. At the' 85 f-instant that the motor and the gears 27 and' 31 'stop' however;l thes'e'membersvare again jalnme together by the camming actionv of the helical surfaces, andthe shafts stop until themotoris avainstarted. Bythis means the 9o ,load on the drums 8 and 9 1s always under. complete control of the motor. 1.. 4 1 As has been stated, .the dumping-.drum must not be rotated until iu'st afterthe drum- Shes closed the bucket.l Thereafterthe two 95 drums-must turn together.- Similarly,v the i drum. 9 mustv be held against backward rota-ftion, so as to support the'bucket while the! drum is running out its cable to dump the?"v i latter.- It" follows from this that some orm= of lost-motion device must. be placedin dief-'1" train of gearin for the du'mpingairulrn` This' device is s own conventionally at 42,2.l and preferably consists of a threaded mem-fl as is'shownin the atent to E. H. Browning, i ,Na 684,599, date October 1-5, 1901.

` The operation is as follows: Assuming the bucket to be lowered and open andthe trol/- ley. in the proper position, the oprator throws the lever 18 to. the left and starts the motor v forward. This turns the gear-27, which cams the member 38`to the right, compressingithe member 40 between itself and' the member 39. As the member 40 is keyedx r 5 to the shaft 23, this shaft and its pinion 25 are turned to rotate the drum 8,*thereby-closinsgv the bucket. In the meanwhile the "ejer 28 and shaft 29 have been turning, but t e ear 30 has remained stationary, owing to the o st motion in the .device 42. Just aftelj'the bucket has closed andthe-weight of the same is thrown upon the cable 10'thehlost motion is fully taken up and the gears v30"arab31 are driven. The gear 31 transmits its motioirto the pinion 33 and. drum 9 through 'the safety lowering device 37 in the manner heretofore dcscribed.- Thereafter the drums 8 and 9 are rotated to ether, hauling in their cablesf at equal Spee s until the bucket is elevatediev now moved to the right, which immediately hperinit's the safety lowering device 36 to yield,- although the device 37 holds fast. This throws the weight of the bucket on the dumping-cables 16, and as the motor 160 'continues to run the bucket opens and dumps .its contents. When it is fully opened, the lo'st motion in the device 42' is fully taken up and -thebucket is lowered by the dumpingcable. After the trolleyiislbrought back to its original position, which would preferably be db ne before the bucket is lowered or while this part of the operation is being performed, the bucket is again ready for filling.

It will be understood that any kind of a motor device that is reversible may be employed instead of the electric motors shown. T he term motor as used in the claims is to be construed broadly unless limited to an electric inotor by the specific wording of the claims.

Having thus described iny invention, what I claiin as new, and desire to secure by Letters Patent, is-

1. In a device of the character described, a b ucket, a closing and a dumping cable connected with said bucket, drums for said cables, a motor for turning said drums, and means requiring a positive operation of the motor for turning the drums in either direction.

2. In a device ofthe character described', a bucket a pair? of drums, cables connected with said drums for operating the bucket a motor for driving said drums in one direction, and means requiring a positive backward operaticn of the motor before the drums can turn in the other direction,

3. In a device of the character described, a bucket, a motor, and means re uiring a positive operation of the motor cit ier to open or to close the bucket.

4. In a device of the character described, a

- bucket, means for closing, hoisting, opening and,lowcring the bucket, and a single lever for controlling all of said means.

-5. In a device of the character described, a

bucket, a motor, a closing 'anda dumping drum for said bucket, trains of gearingconnecting said drums and the motor, and safety lowering devices in each of said trains, Whereby the motor must be positively driven to y turn the drums in either direction.

6. In a hoisting device, a bucket, a bucketclosing drinn, a cable connecting said bucket and drum, a dumping-drum that is made in two part: aid parts being separated by the vthe other drum, a lost-motion device interposed in said train, and means whereby'tl1emotor must be positively driven in order to turn the drums in either direction,said lostinotion device permitting one of the drums to remain stationary for a predetermined time after the other has turned in either direction.

S. In a. device of the character described, a motor, a shaft 23, a gear 27 loose on said shaft and a pinion 25 fixed thereto, a drum having a gear theieon'meshing with the said pinion, a shaft 32, a gear 31 loose thereon and a pinion 33 fixed thereto, a second drum lriven from said pinion 33, gearing connecting said gears 27 and 31, and a lost-motion device interposed in said gearing, for the purpose specified.

9. ln a device of the character described, a motor, a shaft 23, a gear 27 loose on said shaft and a pinion 25 fast thereto, a safety lowering device connected with said shaft, a drum having a gear thereon meshing with and a pinion 33 fast thereto, a second safety lowering device connected with the shaft 32,

a second drum driven from the pinion 33,'

. eessitatc the positive operation of the motor in order to, turn either drum -in either direc-,

tion, and to move the first ,drum a predetermined extent before the second is turned.

in thepresence of two witnesses..

`said pinion, a shaft 32 in. axial alineinent with the shaltl 23, a gear 31 loose thereon,-

In testimony whereof I affix my signature vieron R; iinowivrne.- y

Witnesses: l

v S. E. FoU'rs, C. McELRoY.

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