US702912A - Means for dumping or discharging materials from buckets. - Google Patents

Description

No. 702,9I2. atented June 24, 902. H. A. BARRY.

MEANS Fovb'um'ms 0R DISCHARGING MATERIALS FROM BUGKEIS.

(Applies-titan filed Oct. 29, 1900.)

(ID Model.)

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UNITED STATES PATENT OFFICE.

HERBERT ALFRED LUCAS BARRY, OF XVESTMINSTER, ENGLAND.

MEANS FOR DUMPING 0R DISCHARGING MATERIALS FROM BUCKETS.

SPEGIFIGATION forming part of Letters Patent No. 702,912, dated June 24, 1902. Application filed October 29,1900. Serial No. 34,846. (No model.)

To all whom, it may concern.-

Be it known that LHERBERT ALFRED LUCAS BARRY, a subject of the Queen of Great Britain and Ireland, residing at 15 Great George street, in the city of Westminster, England, have invented certain new and useful Improved Means Applicable for Use in Dumping or Discharging Materials from Buckets, (in respect whereof I have applied for a patent in Great Britain to bear date August 29, 1900, No. 15,416,) of which the following is a specification.

This invention relates to means for dumping or discharging the loaded bucket or similar receptacle and particularly, though not exclusively, applicable for use with transporting apparatus of the character described in the specification forming part of my application for Letters Patent filed May 7, 1900, Serial No. 15,787, the objects of my present invention being to simplify the construction of such apparatus and to render the same more certain in operation.

In the accompanying drawings, Figure 1 is a side elevation of theimproved dumping mechanism, a portion of the carriage-framing, as also a portion of the side plate of the return or fall block, being broken away in order to expose the internal mechanism. Fig. 2 is a corresponding end View. Fig. 3 is a transverse section taken along the line a: {I} in Fig. 1. Figs. 4 and 5 are views of the bucket, showing same in relation to Figs. 1 and 2, respectively.

Dumping mechanism constructed according to my improved method comprises a pulley a, mounted rotatively in slots 1) in the side plates 13 of the return or fall block, around which the rope A,pertainin g to the load,passes on its way to the carriage O. This rope is attached to a pendent arm 0, which is connected, by means of a hinge-pin c, with a bar 62, one end of the latter being arranged to pivot about the wheel-axle c pertaining to the carriage, while the other end carries a pawl e. The free end of this pawl when in a certain. position engages with a cam or star wheel f, which is fast on the shaft g of a drum g, wherein is coiled a spring g About this drum is wound a rope h, whereof one end is secured to the said drum g, the other end being attached by a shackle h to the casing B of the fall-block. This rope is maintained in tension by means of the coiled spring g within the drum g. The pawl e is formed with a lateral projection e, which upon engaging with a stop 6 on the frame of the carriage holds the pawl clear of the cam-wheel f. The downward movement of the bar d is limited by means of a pin 01, which projects from the side of the carriage-framing. The load-rope A being secured to the lower end of the pendent arm 0, a given downward pull is effected on the bar (1, according to the weight of the load. Upon the other wheel-axle c pertaining to the carriage, is secured a toothed wheel 2', and arranged to engage therewith is a pawl Z0, so weighted that it has a constant tendency to assume a vertical position. This pawl is pivoted at one end of a lever Z, the latter being fulcrumed on a pin Z in the side frame of the carriage, the other end of the said lever bearing against the inner-side of the bar (1. In the return or fall block are mounted the sheave or pulley a, around which the rope A, pertaining to'theload, is passed, and ahook m, same being connected by said bars 01 n. The trunnions a of the sheave or pulley,as also the steadying-pins m of the-hook, are housed in the respective slots 1) and b of the casing, so that the said casing B of the fall-block is free to move vertically to a certain extent. The side bars at n are provided with lateral extensions n, in which is mounted the pivot 0 of a lever 0', whereof one end is hinged by a pin 0 to the casing-plates B, and the other end is engaged with the cross-head 19, pertaining to a plunger 1), which passes through the hollow shank of the hook m. The lower end of the plunger 1) is immediately above the free end of the trigger g, which is carried by the bridle r of the dumping-bucket s. The other end of the trigger q is Weighted and is arranged to engage in a catch 8 on the bucket. The trunnions s of the bucket are carried in slots r in the lower extremity of each arm of the bridle r. Thus when the pull is exerted in the act of elevating the loaded bucket the bridle r is first raised, whereby the trunnions s occupy the bottom of the slots r, and at the same time the trigger q is set by being caused to vibrate about its pivot q, with the e'fiect that its free end moves upward toward the plunger 29, the

trigger being thus set in the position for firing automatically as the result of the upward movement of the bridle 1'. The accidental displacement of the trigger is hereby obviated while the bucket is on the ground and before being raised, the arrangement of the trigger being such as to render any vibratory movement thereof nugatory.

Assuming the bucket to be loaded and raised and the carriage run forward in the direction of the arrow 0*, for example, the raising of the block B will permit the coiling of the rope h upon the spring-actuated drum g and in traveling forward the toothed wheel ion the carriage will have carried the weighted pawl k to the one side'of such wheel, so that the bar d rests upon the stop-pin d, the pawl 6, carried by the said bar, being held free of the cam-wheelf, owing to the projection e thereon engaging with the stop 6 on the carriage-framing. So long as the carriage 0 remains stationary the load may be lowered and raised as often as required, no pull beyond that incidental to the tension of the spring g being exerted on the rope 71,, because the pawl 6 cannot engage with the cam-wheel f. If while lowering the load the carriage be moved slightly backward by hauling on the rope A, the movement of the toothed wheelv is reversed and by engaging with the weighted pawl depresses the latter, as also that end of the lever Z whereby it is carried, the other end of this lever being at the same time raised and in turn slightly raising the bar d. During the rising of the bar d the pawl e is lifted free of the stop 6 thus allowing the pawl to swing into engagement with the cam-wheelf until it rests against the pivot Z of the lever K. As the lowering of the load proceeds and the revolving of the spring-actuated drum g effects the paying out of the rope h the camwheel f must pass beneath the end of the pawl. To do this, a greater tension must be exerted on the rope h, attached to the blockcasing, than can be given by the weight of the casing B itself, because the bar at is held down by the load. Thus the cam-wheel f temporarily checks the spring-actuated drum g and the paying out of the rope h, with the result that the return or fall block casing B apparently remains behind, while the ropewheel a, together with the side bars n and hook m, moves by the trunnions a and pins m, pertaining, respectively, to the wheel 6!, and hook m, along the slots 1) and b until the trunnions a and pins mf reach the bottom of their respective slots 1) and b. The whole load now exerts a pull on the rope h sufficient to rotate the cam-wheel f and to force the pawl 6, together with the bar 01, upward, allowing the cam-wheel f to pass. The arresting the downward movement of the fall-block casing B being equivalent to raising the outer end of the lever 0', it follows that upon the vibration of the lever 0' the cross-head p and plunger 19' become depressed, the latter forcing down the adjacent end of the trigger q and allowing the bucket to discharge its load. The releasing of the trigger and the dumping of the bucket are incidental to a combined backward movement of the carriage and a downward movement of the load. By hauling the carriage back during the lowering of the load the motion of the wheel 1' is reversed, its teeth engage the weighted pawl 70 and take it to the opposite side of the wheel 1', the bar d is raised and the pawl e engaged with the cam-wheel f, arresting the motion of the latter, and consequently stopping the paying out of the rope h. The rope it being thus rendered stationary, the downward movement of the fall-block casing is arrested, with the effect that the end of the lever o where it is hinged to the plates is also rendered stationary; but the inner end of the lever by acting upon the plunger causes the latter to depress the trigger q, and thereby to eifect the release of the bucket. For dumping the bucket the backward movement may be imparted to the carriage at any point during the lowering of the load. The weight of the block and load is borne by the rope A. The function of the spring 9 is to permit the rewinding of the rope h about the drum g upon the raising of the load, but not to lift the plates B of the fall-block casing. The normal position of the fall-block casing is shown in the drawings. It is only when the downward movement of this casing is arrested that the trunnions ct occupy the lower ends of the slots 1).

By means of the improved gear the load can be lifted and lowered and traveled'backward and forward as often as may be without dumping; but when required by combining a backward movement of the carriage with a downward movement of the load the latter may be dumped. This can be done at any point on the track and at any desired level. It will be seen that the dumping can always be effected by changing the direction of. travel of the carriage during the act of lowering the load; but in practice I prefer to arrange the apparatus so that the carriage must run forward first, thereby clearing the men who have loaded the bucket and obviating the risk of accident to them in the event of an oversight occurring on the part of the driver.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In apparatus for transporting and discharging materials, a dumping-block wherein a plunger passing through the shank of the hook operates a trigger-lever carried by the bridle of the bucket to release the latter, substantially as herein described.

2. In apparatus for transporting and discharging materials,dumping mechanism comprising a pulley in the return-block and a hook same being connected together and adapted to move vertically in relation to the block-casing, a plunger in mechanical connection with said casing, a tension-rope, a

spring-actuated drum for receiving said rope, a cam or star wheel, a pawl carried by a bar pivoted on one of the carriage-wheel axles and to which the load-rope is connected, a toothed wheel, on the other carriage-wheel axle and a pawl and a lever adapted to be operated by said toothed wheel, substantially as herein described.

3. In apparatus for transporting and discharging materials, a return-block having slotted side plates which carry the pulley pertaining to the load-rope and the book which supports the bucket, and a rope held in tension and adapted to support the blockcasing, substantially as and for the purpose specified.

4. In apparatus for transporting and discharging materials, the combination, with the load-rope A, of the pulley a, slotted plates B,

carriage 0, bar d, pawl e, cam or star wheelf, spring g, drum 9, tension-rope h, toothed wheel 2', pawl k, lever Z, connecting-bars n, lever 0, cross-headp and plunger 19, arranged and operating substantially as and for the purposes set forth.

5. In apparatus for transporting and discharging materials, the combination, With a v plunger operated by the return-block casing,

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