US1522642A

US1522642A - Crane

Info

Publication number: US1522642A
Application number: US420336A
Authority: US
Inventors: Charles M Macnamara
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-10-29
Filing date: 1920-10-29
Publication date: 1925-01-13
Anticipated expiration: 1942-01-13

Description

C. M. MACNAMARA CRANE Filed Oct. 29, 1920 QSheets-Sheet 1 INVENTOR TTORNEY Ja 13. 1925. I r

C. M. MACNAMARA CRANE Filed Oct. 29, 1920 4 Sheets-Sheet 2 R O T N E V m V ATOREY Jan. 13. '1925.

C. M. MAC NAMARA CRANE Filed O ct. 1920 TOR iNVE N 4 S sis-Sheet 5 ATTORNEY Jan, 1925.

C. M. MAC NAMARA CRANE Filed O'ct. 1920 4 Sheets-Sheet 4 INVENTOR MQ/WW ATORNEY atented Jan. 13, 1925.

CHARLES M. MACNAIEARA, OF BRIDGETON, GLASGOW, SCOTLAND.

CRANE.

Application filed October 29, 1920. Serial No. 420,336.

To all whom it may concern:

Be it known that 1, CHARLES MICHAEL MAONAMARA, a subject of the King of Great Britain and Ireland and the Isle of Man, and a resident of Bridgeton, Glasgow, Scotland, have invented new and useful Improvements in and Relating to Cranes, of which thefollowing is a specification.

This invention has reference to improvements in and relating to cranes and the like and comprises automatically acting means for tipping the bucket thereof.

According to this invention the bucket is provided with dogs or equivalent looking means, which, when the bucket is being raised prevent same from tipping. Suspended from or secured to the jib of the crane or the like is a member which, through suitable intermediate means actuates and disengages said locking means and thereby permits the bucket to tip.

Preferably said member also acts as a guide which ensures that the bucket will turn only in the desired plane.

Under one arrangement the member would comprise what We term a crown piece which is suspended from the jib of the crane. This crown piece when the bucket is raised actuates through suitable links or levers or a combination thereof the said locking means and thus permits the bucketto tip.

Under another arrangement, suspended and pivotally secured to the jib is a rigid member having a hooked shaped lower extremity. The said rigid member is actuated so that when the bucket is raised, the hooked extremity is below the linkwork or the like actuating the locking means. This linkwork, when the bucket is slightly lowered is engaged and thereby raised by said hooked extremity, thus disengaging the locking means and permitting the bucket to tip.

The empty bucket would then be slightly raised, the hook or hooks moved clear of the linkwork or the like and the bucket lowered to be reloaded.

The movement of. said framework may be actuated automatically by the raising and lowering of the jib or moved manually or automatically in a manner hereafter described.

The bucket is preferably so constructed that when full it will tilt when the locking means are disengaged and when empty will automatically right itself. This is accomplished by placing the trunnions or the axis about which the bucket turns at a level slightly higher than the centre of gravity of the bucket when empty and shaping the bucket so that it has a greater capacity above said axis than below. By this means the bucket when full always tends to tilt but when empty as the trunnions are located as aforesaid, it automatically rights itself.

For a complete understanding of this invention reference is had to the accompanying drawings wherein illustrative but preferred embodiments of the invention are disclosed and wherein Figure 1 is a front elevation illustrating a bucket and means of the suspended crown piece type for disengaging the locking means.

Figure 2 is an end elevation of Figure 1.

Figure 3 is a view corresponding to Figure 2- but showing the crown piece and disengaging gear in contact.

Figure 4 is a larger view of the bucket and crown piece, the latter being shown partly in section.

Figure 5 is an end view of Figure l, also partly in section.

Figure 6 is a fragmentary plan view showing the locking mechanism.

Figures 7 to 10 illustrate a bucket and disengaging gear of the suspended hook type, Figure 7 being an elevation of the bucket and suspended rigid member the latter being shown in the position it would occupy before being moved below the disengaging gear. Figure 8 is an end View of Figure 7.

Figure 9 is a view corresponding to F igure 7 but showing the hooked extremity moved forward.

Figure 10 illustrates a view corresponding to Figure 9 but showing the bucket lowered to actuate the disengaging gear.

Referring now to the drawings for a detailed description of the constructions therein shown and first to Figures 1 to 6 inclusive A is the bucket, 13 the supporting frame or handle, 0 the crown piece and D the jib of the crane or the like. a are two dogs carried by the frame B and engaging corresponding notches in the lip of the bucket them between the twoc'ro'ssbars (g secured to the "frame ofsaid "ba'rsji sforn'itteiii'n Figure, "for clearness of disclosure.

, "Pinsisecure'd to the inner ends; of'said {links if pass' through slots h in a plate z secure dto a rod j.

The bucket *is carried by a hook "at the carried by'the usual rope or chain/ passing "over the pulley} at the end of thejib D.

The crown piece C comprises a cylindrical member suspended by two ropes or chains "m ipa'ssi'rig over fthe pulleys '0 alignment with 'thep'ulley Z. v fi'iitei'ior of'saidcylin'der is a second cylin'der gre f l coated in the cut preferably as shown inclligures '4 f and 5 so as to form an inclined p'lanefor g'uid- ;'f i ng surface Alternativelylsuch" surface 9 may be made integral "wlth the outer cylinder.

I I An angle 7 surro unds the foot of the said f outer c lin'der'and short guiding links a connect the dogs e to the frame'B.

'The operation of'this arrangement is as follows: H V V The crown 'fp'iece 1s l'lISi'. adjusted to the required heigl'it.

1 When the bucket is rai'sedthe torpedo shaped member t enters the crown piece and the rodj comes ncontactfwlth'the lower face of the angle iron 1" andis consequently depressed. T his motion it transfers to" the links f, whichfturning about their piyots, ra'isethe dogs 6' c'lear' of the notches and 4.5

thereby permits the bucket to tilt. I

This usually desirable. that the bucket should tilt in a given plane and to ensure the'projecting end of the pin u whlch passes through the end of the torpedo shaped member 25,,and by which the chain or 1fo pe isjsec'ured thereto, bears against the guiding surfac 9 "when the bucket is nearly fully raised and is guided into the slot n'at the-endof the guiding surface. :When hesofguided thesaid projecting'en'd turns thegmember tan'd thereby" also the bucket A horizontal plane to the reqr'iired. tipping position.

"Should'it be required to alter the plane in which the bucket tipples this maybeaccomalished by turning the crown piece bodily 'or alternatively the inner' throughthe required angle.

cylinder only 1 If desired in order'topieyentor minimize ii'otches 2 any" turning moment b'eii'ig' imparted to the 'disengaged and the bucket allowed to tip,

' 'strikethe sea.

7 The-invention will nowbe describetl with reference to the modification illustrated in Fi ures 7to'10.

he bucket Ais provided"with the usual frame or'handle 'B 'which' latter is provided withlocking'dogsZ. Said dogs, when the bucket is being raised, engage corresponding 7 v inthe'lip of the bucket which'is therebyfprevelited fromtipping The dogs are connected to affranie 3 which is'preferably shaped as illustrated to follow the :COlllDOHl off the bucket frame B which latter "acts asafs' upport 'al'idguide.

The bucket is suspended by u a hook 'secured to'j'a c oneit'orpedo' or like s'hap'edfmem- "ber ewhich in turn is connected"tothe usual rope or"c'hai'n'5*which 6 of theii .D-

Suspended froma' nd pivotally secured to the jib D is'a .frame 7 wvhoselowerend is hooked and wh'iclnas'will' be hereafter expasses over"t-he pulley plained, actuates the frame 3 to disengage t'he'dogs 1. Preferably said hooked extrei'n ty comprises a plate 8 of U'crosssection 'a'nd having its sides wedge "shaped to 'formj as shown alsoat g in Figs. 4 and '5,

inclined cam faces as illustrated.

10 is a rope o'r equivalentmeans by which the hooked extremity of the frame is moved towards'the rope5 against the action of a counter poised weight 9. The operation of this n'iodi'fication is as follows:

The bucket is loaded and raised, being prevented from tipping" by the dogs 1. During this operation the hooked extremity 8 is moved towards the rope 5," the latter and the member 4' passing between the two sides of' the plate 8. This latter actsas'a guide for the upcoming frame B'gwhich bears on the "inc'lined cam faces of the plate 8 and is turned so asto lie in the required plane. This ensures that the frame 3 'will engage properly with thehooks of plate 8 aiid also that the bucket will' tipple in the desired plane. When the bucket has reached the position shown igure 9, i. e., when the frame 8 is over the hooks of the-plate 8,:it

is then lowered to the positiodshown in Figure 10. This causes the frame 3 to come in contact with the hooks andconsequently to be raised. 1 By this 'means thexdogs are The empty bucket would then be raised slightly to clear the hooks, the latter moved clear of the rope and the bucket again lowered to be reloaded. The movement of the hooked extremity 8 of the frame 2' towards and away from the rope may be accomplished in various ways.

For example, a rope 10 or the like would be secured to an upward extension of the frame 7 as shown, and the other end thereof to any suitable part of the crane or winch. In operation under this arrangement the loaded bucket is first raised as usual and subsequently the jib is also raised. This latter movement moves the hooks towards the chain 5. To free the bucket from the hooks the former is first raised slightly and the jib lowered thus permitting the hooks to move clear of the rope under the action of the weight 9.

The length of the rope 10 would preferably be such that When the jib is raised to the necessary height, the chain 5 is passing between the hooks. Of course instead of the pivoted hooks being brought towards and freed from the chain by the movement of the jib, this operation may be performed separately by hand through any suitable means.

The type of bucket used is preferably that which will now be described with particular reference to Figure 4.

The trunnions o are so positioned that the axis 00-50 about which the bucket rotates or tips is above the centre of gravity of the bucket when empty, so that after tipping the bucket rights itself. The capacity of the bucket above the line m-w is greater than that below said line, so that when full the centre of gravity of the bucket and contents is above the axis.

Therefore when full the bucket would always tend to tip or rotate about its axis.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language to be used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall therein.

hat I claim and desire to secure by Letters Patent is 1. In a hoisting apparatus, in combina tion, a hoisting bucket, hoisting means for said bucket, means for holding said bucket in load-carrying position, and means dependent upon operation of the hoisting means for automatically turning said bucket, so it may be tipped in a desired plane.

2. In a hoisting apparatus, in combina tion, a hoisting bucket, hoisting means for said bucket, means for holding said bucket in load-carrying position, means dependent upon operation of the hoisting means for automatically moving said bucket so it may be tipped in a desired plane, and means for subsequently releasing said holding means.

3. In a hoisting apparatus, in combination, a hoisting bucket, hoisting means for said bucket, mean for holding said bucket in load-carrying position, means dependent upon operation of the hoisting means for automatically releasing said holding means, and means for automatically turning said bucket so it may be tipped in a desired plane.

i. In a hoisting apparatus, in combination, a hoisting bucket, hoisting means for said bucket, means for holding said bucket in load-carrying position, means dependent upon operation of the hoisting means for automatically turning said bucket so it may be tipped in a desired plane upon elevation thereof, and means for subsequently automatically releasing said holding means.

5. In a hoisting apparatus, in combination, a hoisting bucket, hoisting means for said bucket, means for holding the bucket in load-carrying position, means dependent upon operation of the hoisting means for automatically turning said bucket so it may be tipped in a desired plane, means for automatically releasing said holding means when said bucket is raised to a. predetermined position and means whereby said bucket moves automatically to dumping position.

6. In a hoisting apparatus, in combination, a hoisting bucket, hoisting means for said bucket, means for holding said bucket in load-carrying position, means for automatically releasing said holding means at a predetermined point in the travel of the bucket and means operable prior to the release of said holding means for automatically turning said bucket on a vertical axis.

7. In a hoisting apparatus, in combination, a hoisting bucket, a hoisting rope for said bucket, means for holding said bucket in load-carrying position and means adjacent said rope and adapted to contact with. said holding means at a predetermined point in the elevation of the bucket for releasing the latter and allowing it to tip to dumping position, and means associated with said releasing means to automatically swing said bucket on a vertical axis prior to the release of said holding means.

8. In a hoisting apparatus, in combination, a jib, a hoisting bucket carried in suspension by said jib, means for raising and lowering said bucket, means carried by said jib adapted to automatically align said all) bucket while thelatter is being raised and automatic means for subsequently causing said bucket to be dumped.

:In: a hoisting apparatus, in combine tion, a hoisting bucket, hoisting connections for. said bucket and means co-operating with said -.'connections for automatically positioning. the bucket duringraising movement thereof.

10.. In a hoisting apparatus, inicombination, a-hoisting bucket, hoisting connections for said bucket, including a block, a member supportedadjacent said hoisting connections and adapted 'to co-operate with said block to swing said bucket into a predetermined dumping position.

ll. Inv ahoisting apparatus, in combination, a hoisting bucket, hoisting connections for said bucket, including a block, a member supported adjacent said hoisting connections, said block and member having complementary. formations adapted to inferengageas the bucket is raised to automatically position the latter in dumping position.

12.'In a hoisting-apparatus, in combination, a hoisting bucket, hoisting connections forsaid'bucket, including a block, a member supportediadj'acentsazid hoisting connections and a projection and cam surfaceassociated with said" block and member adapted to 'co-operate as the bucket is raised to automatically position the latter in dumping position.

18. In a hoisting apparatus, in combination, a bucket having supporting means pivotally connected thereto, means for looking said bucket stationary with respect to said supporting means including members carried by said supporting means adapted to engage parts of said bucket and readily disengageable therefrom, links pivotally connected to said members and an actuating trigger loosely connected to said links.

14. In a hoisting apparatus, in'combination, a jib, a bucket, supporting means for said bucket carried by said ib and vertically movable with respect thereto, a guide carried by said jib independently of said supporting means and means comprising a tubularmemher having a cam face adapted to contact with a part of said supporting means thereby to rotate said bucket on its-vertical axis into a predetermined position during elevation thereof, said face terminating in a slot adapted to register with'said co-operating part upon subsequent elevation of said bucket.

15. In a hoisting apparatus, in combination, a hoisting bucket, means for locking said bucket in load carrying position, means for automatically turning said bucket, dependent upon travel thereof, for tipping in a predetermined plane, means for holding said bucket in said predetermined plane and means operating subsequently to said holding means forreleasing said locking means.

"16. In a 'hoisting ,apparatus, in combina tion, a hoisti-ng bucket-,means for locking said bucket in loadcarrying position, means for automatically "turning said buoket,- dependent upon travelthereof, for tipping in a predetermined plane, meansforholding said bucket :in said predetermined plane,and means for releasing said locking means, said positioning means,- holdcng means, and'lock- 111g emeans functioning sequentially during a hoisting aoperation of said bucket.

17.. In a hoisting apparatus, in combination, auho-istingbucket having a notch,- a suppo-rtingbailiattached to said bucket, and alatch mounted-upon said bail and adapted to. seat in 'sa-id notch -for holding said bucket in load carrying position, said latch having a: bifurcation cooperating with said" bail to transmit locking thrusts thereto "from *the notch ofrihe bucket.

18. In a hoisting .apparatus,.in:combination, a tilting hoisting bucket, asupporting bail attacheditoisaid bucket, latch mounted for bodily'imovement on -said'ibail for holding said bucket "in load carrying: position, and automaticnneans operative :upontravel of the bucket to: release tsaid blatch so :as to permit-said:buoket'. to tilt.

19.?Inarsh'oisting apparatus, -in combination, a hoisting bucket, a-isupportingrbail attached tozsaid-bucket, a: bodily movable latch for holding said bucket in load carr ing position, an operating rod carried b said bail and operatively connected tocsaid latch, and means for 'operati g said rodrin different angular positions of said bail.

2O. In a hoisting, pparatus, in combination, a ,hoisting'bucket, a supporting bail attached to said bucket, a rigid bodily movable latchxmember for holding said bucket in load carrying position and having a bifurcation cooperating with .said bail, an operating rod carried by said'bail'and operatively' connected with said latch, and means for automatically operating said rod in clifferentangular positions of said bail.

' 21. In a hoisting apparatus, in combination, a tilting hoisting bucket, a supporting bail attached to said bucket, a latch'bar mounted for bodily movement on said bail for holding said. bucket in load-carrying position, said latch bar having a latching terminal for-simultaneous engagement with said bail and bucket to resist tilting movement of the latter'in either direction.

22. In a hoistingcapparatus, in combination, a tilting hoisting bucket, a supporting bail attached to saidbucket, a latch bar mounted for bodily movement on said bail for holding said bucket in load-carrying position, said latch bar having a latching terminalfor simultaneous engagement with said bail and'bucket to resist tilting movement of the latter in. either direction, a latch tripping rod carried by said bail, and a tripping member for engagement With said rod in different angular positions of the bail for automatically tripping said latch upon movement of the bucket.

23. In a hoisting apparatus, in combination, a hoisting bucket, a hoisting mechanism having a single hoisting rope attached to said bucket for raising and lowering the same, and means dependent upon operation of said hoisting mechanism for automatically turning said bucket so it may be tipped in a desired plane 24. In a hoisting apparatus, in combination, a hoisting bucket, a hoisting mechanism having a single hoisting rope attached to said bucket for raising and lowering the same, means dependent upon operation of said hoisting mechanism for automatically turning said bucket so 1t may be tipped 1n a desired plane, and means for stopping the bucket in the desired plane and holding it there during dumping of its contents.

25. In a hoisting apparatus, in combination, a hoisting bucket, a hoisting mechanism having a single hoisting rope attached to said bucket for raising and lowering the same, means dependent upon operation of said hoisting mechanism for automatically turning said bucket so it may be tipped in a desired plane, said turning means including a cam and cooperating lug, said cam merging into a seat which cooperates With said lug for stopping said bucket in the desired plane and holding it there during dumping of its contents.

CHAS. M. MACNAMARA.

Witnesses:

JOHN SEWART, FREDERICK ALEXANDER WARDLAW,