US430561A - Apparatus for operating dredge or excavator buckets - Google Patents

Description

2 Sheets-Sheet 1-.

(No Model.)

P. B. BARROWS.

APPARATUS FOR OPERATING DREDGE oP-PxcAvAToP BUGKETS.

Patented June 17, 1&901.

INVENTOR- 1 A? $00M ATTORNEYS.

WITNESSES:

(No Model.) 2 SheetsSheet; 2. F. B. BARROWS.

APPARATUS FOR OPERATING DREDGE OR EXOAVATOR BUGKETS. No. 430,561.

Patented June 17, 1890.

ATTORNEYS.

mums mans 5a., macro-mum, WASN UNITED STATES ATENT OFFICE.

FREDERICK l3. BARROWS, OF DULUTH, MINNESOTA, ASSIGNOR TO HIMSELF AND WVILLIAM M. SPALDING, OF SAME PLACE.

APPARATUS FOR OPERATHNG DREDGE OR EXCAVATOR BUCKETS.

SPECIFICATION forming part of Letters Patent No. 430,561, dated June 17, 1890.

Application filed August '7, 1889.

To all whom it may concern:

Be it known that I, FREDERICK B. BAR- ROWs, of Duluth, in the county of St. Louis and State of Minnesota, have invented a new and Improved Apparatus for Operatil'lg Dredge and Excavator Buckets, of which the following is a full, clear, and exact description.

The invention relates to hoisting-machines; and its object is to provide a new and improved hoisting-bucket specially designed to conveniently, rapidly, and automatically transfer coal, grain, and other similar articles from one place to another.

The invention consists of a carriage provided with a tail-carriage, a bucket held on a rope supported from the said carriage, and a bucket-boom provided with an adjustable fulcrum.

The invention also consists of certain parts and details and combinations of the same, as will be hereinafter fully described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement with parts broken out. Fig. 2 is an enlarged transverse section of the same on the line 00 a: of Fig. 1. Fig. 3 is an enlarged side elevation of the bucket. Fig. 4. is an under side view of the same. Fig. 5 is an enlarged side elevation of part of the bucket-boom. Fig. 6 is an enlarged sectional side elevation of the lower end of the bucket on the line y y of Fig. 4, and Fig. 7 is a similar view of the same on the line ,2 z of Fig. 4. Fig. 8 is a side elevation of part of the main carriage.

The improved hoisting-bucket G is provided with an inclined track B, on which is mounted to travel the main carriage O, on which is secured one end of a rope D, passing under a sheave E, supporting a U-shaped rod F, preferably connected at its ends with the sides of the bucket G. The rope D, after passing under the sheave E, extends upward and over a pulley II, mounted to turn in suitable hearings on the carriage O. The

rope D then extends above the track 13 and in line with the same to suitable hoisting- Serial No. 319,976. (No model.)

machinery for winding up or unwinding said rope.

On the outside of the bucket G is secured the boom I, provided on its under side with a rack I, meshing into the gear-wheel J, secured on a shaft J, mounted to turn in suitable bearings formed on the brackets K, extending downward from the tail-carriage K, rigidly connected by a reach K with the main carriage O. The tail-carriage K travels in the rear of the main carriage O on the track B.

In order to hold the boom I in mesh with with the gear-wheel J, two plates J 2 are held loosely on the shaft J, said plates extending on the sides of the boom 1 and held in place on the shaft by collars J secured by setscrews or other means on the said shaft J. The upper ends of the plates J 2 are connected with each other by rollers J traveling on the tops of the boom J, so that the boom is free to pass between the two plates J but at the same time is always held in mesh by its rack I with the gear-wheel J. As the plates J are fulcrumed loosely on the shaft J, the boom I is free to swing in any desired direction without beingdisconnected from the gearwheel J.

On the reach K is held to slide in a suit able bearing K a rod L, provided near the said bearing K with a lug L. The other end of the rod L is rigidly connected with a lever N, operating the shaft 0, mounted to turn in suitable bearings in the brackets K. On the shaft O is fastened a crank-arm O, to which is secured one end of a brake-band P, passing around a brake-pulley P, secured on one end of the shaft J. The other end of the brakeband P is secured on the bracket K, as is plainly illustrated in Fig. 1.

The lug L of the rod L is operated on by the lower end of a lever Q, pivoted on a bumper R, supported by suitable brackets R on the track B. The upper end of the lever Q is connected with a rope Q under the control of the operator. The bumper R is provided in its top with a notch R adapted to be engaged by the hook S of a lever S, fulcrumed near the front end of the main carriage O. The lever S is provided with a downwardly-extending arm S adapted to be engaged by the sheave E, as hereinafter more fully described.

On the main carriage C is held to slide a rod S pivotally connected wit-h one end of an arm S secured on the shaft S extending transversely and mounted to turn in suitable hearings on the main carriage O. The other end of the arm S is connected with a spring S, held on the main carriage. In the middle of the shaft S is secured a hook S adapted to engage a hook E, formed on the sheave E, and serving to support the bucket G while the latter travels forward or backward with the main carriage C. On the rod S is a collar S serving to limit the rearward 'motion of the rod S caused by the spring S".

The bucket G is provided with a hinged bottom G, on the under side of which is held in a suitable bearing G a sliding bolt T, adapted to engage a bolt-plate G secured to the outside of the bucket G. The bolt T is pivotally connected with an arm T, pivoted on the under side of the bottom G, and is held in an outermost position by a spring T (Plainly shown in Fig. 4.) The free end of the pivoted arm T is pivotally connected with a rod T held to slide in a bearing G fastened on the under side of the bottom G. The rod T projects slightly beyond the hinged end of the bucket-bottom G, and is pivotally' connected with one arm of a bell-crank lever U, fulcrumed on the bucket G, and pivotally connected at its other end by a link U with a bell-crank lever U fulcrumed on one side of the boom I. The other arm of the bellcrank lever U is pivotally connected by a link U with an arm U secured on a shaft U extending transversely and mounted to turn in suitable bearings on the under side of the boom 1. A spring U is fastened by one end on one side of the boom I, and is connected at its other end with thelink U so as to hold the latter in a normal position-that is, holding the sliding bolt T looked, as shown in Fig. 6. On one end of the shaft U is secured an armU adapted to be engaged by a fixed lug at the end of the track B. When the bucket G is moving in the direction of the arrow 0. to the end of the track B, the arm U strikes against the fixed lug, so that the said arm is moved in the direction of the arrow 1), whereby the sliding bolt T is withdrawn from the boltplate G and'the bottom G is free to open that is, to swing downward to permit the contents of the bucket G to drop out of the same. After the bucket has been emptied the bottom G is again closed by the device now to be described. On the under side of the bottom G, near its hinged end, is secured an arm V, pivotally connected at its outer end with a link V, pivoted on a second link V fastened on a short shaft V mounted to turn in suitable bearings on the top of the boom I, as is plainly shown in Fig. 3. Near the fulcrum end of the link V is pivotally connected a rod V held to slide in a bearing V secured to the rear side of the boom I. A spring V is coiled on the said rod V, and rests with one end against said bearing V and its other end presses against the front edge of the link V The links V and V are prevented from closing too far inward toward the bucket G by a lug V secured on the said bucket opposite the joint of the two links V and V When the bottom G is swung open, as previously described, the links V and V assume the position shown in dotted lines in Fig. 3, the spring V being then compressed. The moment the contents of the bucket G have passed out of the .same the spring V forces the links V and V to their former position, so that the bottom G is again closed. Then, as soon as the arm U is released from the fixed point by the bucket G moving in the inverse direction of the arrow a, the springs U and T cause the sliding bolt T to again engage the bolt-plate G so that the bottom G is again locked to the bucket G.

The operation is as follows: As shown in Fig. 1, the bucket G is on its return movement in the inverse direction of the arrow (1,. As soon as the main carriage C strikes against the bumper R the return motion ceases and the hook of the spring-pressed lever S engages the notch R in the top of the bumper B. At the same time the rod S moving against the bumper R, with the carriage, is pressed forward against the tension of the spring 8, so that the hook S swings rearwardly and disengages the hook E of the sheave E. As the carriage C is locked in place on the bumper R by lever S, the hook S remainsin this position untilthe lever S is disengaged, as hereinafter described. The operator now causes the rope D to unwind, so that the sheave E is lowered, the bucket G swinging rearward and downward in the direction of the arrow 0, the fulcrum being the contacting tooth of the rack I with the gear-wheel J. The shaft J is prevented from turning by the operator pulling on the rope Q, so that the lever Q presses against the lug L of the rod L,wherelIO by the latter presses the band P against the brake-pulley P, so as to prevent the shaft J from turning. The boom I thus swings as a pendulum on the periphery of the gearwheel J, and is held in contact with the said periphery by the plates J 2 and the rollers J When the boom 1 has assumed an upright position, as shown in dotted lines in Fig. 1, the operator releases his pull on the rope Q, so that the shaft J is free to turn, and at the same time the rope D is permitted to unwind still farther, whereby the bucket G, with the boom I, passes downward until the bucket swung upward and is disengaged by its hook S from the bum perR. The rod S is now moved rearward by the action of the spring S, so that the hook S engages the hook E of the sheave E, and thereby supports the bucket G on the traveling motion of the carriage C. The carriage O, as well as the tail-carriage K, after being unlocked by lever S, as above described, is free to be pulled forward by further winding up of the rope D. This causes a forward motion of the carriage C, the tailcarriage K, and all of the devices suspended from the same, so that the bucket G moves forward in the direction of the arrow a to the point where the bucket G is to be unlocked. When the carriage C, with the bucket G, arrives at the point of unlocking, the arm U strikes against the fixed point previously mentioned, the bucket G is emptied, the bottom G is again locked, and the carriage is returned, as previously described.

Having thus fully described my invention, I claim as new and desire to secure Letters Patent 1. The combination, with a carriage provided with a tail-carriage, of a bucket held on a rope supported from the said carriage and a bucket-boom mounted on an adj ustable fulcrum supported on the said tail-carriage, substantially as shown and described.

2. The combination, with a carriage provided with a tail-carriage, of a rope supported on one end of the said carriage and connected with a drum, a sheave held on the said rope, a bucket supported from the said sheave, and a bucket-boom fastened on the said bucket and held to slide in a suitable bearing secured on the said tail-carriage, said bearing alsoforming a pivotfor the said boom, substantially as shown and described.

3. The combination, with a carriage pro vided with a tail-carriage, of a rope supported on one end of the said carriage and connected with a drum, a sheave held on the said rope, a bucket supported from the said sheave, a bucket-boom fastened on the said bucket and held to slide in a suitable bearing secured on the said tail-carriage, said bearing also forminga pivot for the said boom, and a lever held on the said carriage and adapted to lock the latter in place,said lever being unlocked by the said sheave, substantially as shown and described.

l. In a hoisting-bucket, the combination, with a bucket provided witha hinged bottom and locking devices for the same, of a spring mechanism forclosing the bottom automatically after theload is dumped, said mechanism consisting of links V V jointed to a-fixed fulcrum at the upper end, to an offset from the hinged bottom at the lower end, and to each other in the middle, a spring for throwing these links toward alignment, and a stop for preventing them from passing into exact alignment, substantially as shown and described.

5. The combination, with a carriage and a tail-carriage connected with the said carriage, of a bucket suspended from the said main carriage, a boom provided with a rack and extending from the said bucket, a gear-wheel in mesh with the said rack, a shaft carrying the said gear-wheel and mounted in bearings on the said tail-carriage, side plates fulcrumed loosely on the said shaft, androllers connecting the said side plates with each other and resting on top of the said boom, substantially as shown and described.

6. The combination, with a carriage anda tail-carriage eonn ected with the said carriage, of a bucket suspended from the said main carriage, a boom provided with a rack and extending from the said bucket, a gear-wheel in mesh with the said rack, a shaft carrying the said gear-wheel and mounted in bearings on the said tailcarriage, side plates fulcrumed loosely on the said shaft, rollers connecting the said side plates with each other and resting on top of-the said boom, a brake-pulley held on the said shaft, and a brake-band adapted to engage the said brake-pulley, substantially as shown and described.

7 The combination, with a carriage and a tail-carriage connected with the said carriage, of a bucket suspended from the said main carriage, a boom provided with a rack and extending from the said bucket, a gear-wheel in mesh with the said rack, a shaft carrying the said gear-wheel and mounted in bearings on the said tail-carri age, side plates fulcrumed loosely on the said shaft, rollers connecting the said side plates with each other and resting on top of the said boom, a brake-pulley held on the said shaft, a brake-band adapted to engage the said brake-pulley, and mechanism, substantially as described, for operating the said brake-band, as set forth.

8. The combination, with a carriage and a tail-carriage connected with the said carriage, of a bucket suspended from the main carriage, a boom provided with a rack and extended from the said bucket, a gear'wheel in mesh with the said rack, a shaft carrying the said gear-wheel and mounted in bearings on the said tail-carriage, side plates fulcrumed loosely on the said shaft, rollers connecting the said plates with each other and resting on top of the said boom, a brake-pulley held on the said shaft, a brake-band adapted to engage the said brake-pulley, a lever for operatin g said brake'band and held on the said tail-carriage, a rod connected with the said lever and mounted to slide on top of the said tail-carriage, and also provided with a lug, and a second lever under the control of the operator and adapted to engage the lug of the said rod, substantially as shown and de scribed.

FREDERICK B. BARROWS. W'itncsses:

N. A. GEARHART, W. L. JACKSON.

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