US987492A - Crane-bucket. - Google Patents

Description

1. A. ROBERTS. CRANE BUUKET. APPLICATION FILED MAY 14, .1910.-

Patentedr Mar. 21, 1911.

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J. A. ROBERTS. CRANE BUCKET.

APPLICATION FILED MAY 14, 1910.

987,492. Patented Mar. 21, 1911.

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JOHN ACE ROBERTS, OF CARDIFF, ENGLAND.

CRANE-BUCKET.

Specification of Letters Patent.

Patented Mar. 21, 1911.

Application filed May 14, 1910. Serial No. 561,352.

To all whom it may concern:

Be it known that I, Jer-1N Aon Itonnsrs, a subject ot the King of Great Britain, ing at Q1 Park Place, Cardiff, Glamorganshire, Wales, England, have invented new and useful Improvements in Ciane-uckets, of which the following is a specilication.

My invention relates to crane buckets for use in coaling, excavating, building and other operations, and more particularly to that class of such buckets wherein the sides are adapted to be lifted relatively to the bottom for the purpose ot' discharging the contents, the object of my invention being to construct a bucket of this kind which is suspended by a single rope, and which can nevertheless be discharged by the driver of the crane working the bucket.

According to my invention I attach to the bottom a stem or standard the upper end of which is united by a rod to one end of a link or bar having recesses in which a ring 01 the like on the crane chain or rope engages, and the body is provided with trunnions or the like to which the bucket bail is connected, the free end of the said bail be ing pivotally attached to the other end of the link.

To enable my invention to be fully understood I will describe the same by reference to the accompanying drawings in which Figure 1 is a sectional elevation, and Fig. 2 is a plan of a crane bucket arranged in accordance with my invention. Fig. 3 is a view similar to Fig. 1 of a modication but showing the bucket in the position for the discharge of the contents.

a indicates the body of the bucket, which, as Shown is of circular section, and l) indicates the conical bottom, o, o being guide rods fixed to the latter which work in the guide sockets (Z, Z on the body.

e is the bail of the bucket which is connected to trunnions j', j" thereon, and g is the stem or standard which is fixed to the bottom o.

71, is the link or supporting bar on which a ring or eye z' on the crane chain or rope slides, the said link having in it the two recesses y', j in which the ring can engage. This link h is at one end pivotally attached to the bail c and at the other end is pivotally connected by a rod c to the upper end of the stem or standard g. The connecting rod 7c, bail c and link 71, are of such relative lengths that when the body o rests upon the bottom o as shown in Fig. 1, the ring z' of the crane will lie in the recess y' over the center of the bucket. Upon the extended end 71.2 ot the bar 7L adjacent to the recess is arranged a weight Z (or if desired this weight may be i :red upon the rod 7c as shown in Fig. 3) the normal tendency of which will be to swing the link L, rod /c and bail c in the direction of the arrow l, Fig. 1, so that when the crane ring is dropped out of the recess the said link 71. with the connected parts will be thrown over to the position indicated by the dotted lines in Fig. l, whereby the recess j will be brought into proximity to the ring 'z'. If, now` the crane-chain is drawn up the effeet will be to litt the body a independently of the bottom o so that the parts will assume the position shown in Fig. 3, any material within the bucket being discharged from the same by sliding off the conical surface I) of the bottom.

When the bucket is loaded the parts are in t-he position shown in Fig. 1, that is to say, with the ring i in the recess j; when the contents are to be discharged the bucket is dropped on to the ground or heap so that the weight Z operates as before described to throw over the bail e, whereby, on the chain being again drawn up, the contents will be discharged. To close the bucket it is again dropped on to the ground or heap, whereupon the body c, owing to its weight, drops on to the bottom, while the ring and chain will fall or slide down the link toward the recess j as indicated by the dotted lines in Fig. 1. While in this position the bucket is ready for loading.

A. cord m or the like may be att-ached tothe lifting chain for retaining the ring i in the recess j so that when the crane chain is again drawn up, the link 7a, and connected parts will be thrown over to the position shown in full lines in Fig. l for the bucket to be hoisted away. v

n, is a stop placed upon the sides of the bucket for preventing the bail from falling over too far in the direction o the arrow 2.

The bucket hereinbefore described is very advantageously used for loading or discharging lump coal as it enables the latter to be handled with a minimum of breakage.

Claims.

1. A crane bucket comprising a main body and a bottom connected therewith to slide toward and from the main body, a standard connected centrally to said bottom, a bail pivoted to said main body, and a link or supporting bar connected at one end to said bail and at its opposite end connected with said standard, said supporting bar being provided with tWo recesses, one near the end connected to said bail and the other near its opposite end, whereby when the recess near the bail end of the supporting bar is centrally over the bucket the bottom is permitted to descend to discharge the contents of the bucket and When its other recess is in said position the bucket Will be closed.

2. A crane bucket having a main body and a bottom connected therewith to slide toward and from the main body, a standard connected centrally to the said bottom, a bail pivoted to said main body, a supporting bar connected at one end to said bail and near its opposite end connected by a link to the said standard, the said supporting bar having a recess near the end at which it is connected to said bail and another recess near its connection to said link,

the said construction including a Weight secured to one of said parts to cause the said supporting bar when released from burden to move in a direction to bring the recess near the bail centrally above the bucket.

3. A crane bucket having a main body Y secured to the end connected With said .Y

standard tending when the supporting means is slackened, to move the parts to bring the bail approximately centrally over the said bucket.

JOHN ACE ROBERTS. lVitnesses ALBERT SPHILLIPS, MORGAN ROBERTS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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