US1342759A - Excavating-dipper - Google Patents

Description

M. E. PUGH.

EXCAVATING DIPPER.

1-.PPLICATION FILED APR. I7, 1919. 1,342,759. Patented June 8, 1920.

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filiy M. E.'PUGH.

EXCAVATING DIPPER.

APPLICATION FILED APR. 17. 1919.

Patented June 8, 1920.

7 SHEETS-SHEET 2.

M. E. PUGH.

EXCAVATING DIPPER. APPLICATION FILED APR. 17, 1919.

Patented June 8, 1920.

7 SHEETS-SHEET 3.

M. E. PUGH.

EXCAVATING DIFFER- APPLICATION FILED APB.17. 1919.

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G EXCAVATING DIPPER. APPLICATION FILED APR. 17. 1919.

1,342,759. Patented June 8, 1920.

,7 SHEETS.SHEET 5- N02 ro/v E PUGH M. E. PUGH.

EXCAVATING DIPPER.

APPLICATION FILED APR. 17. 1919.

Patented J 11119 8, 1920.

7 SHEETS-SHEET 6 O O O O Irma :I Moero/v PUG UNITED STATES PATENT OFFICE.

MORTON E. PUGH, OF CHICAGO, ILLINOIS.

EXCAVATING-DIPPER.

Application filed April 17,

To all "Lo/b.0112 it may concern.

Be it known that I, MORTON E. PUGH, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Excavating-Dippers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to an improved t pe of an excavating machine dipper adapte to be adjustably suspended from a movable boom which may be adjusted to co-act with the dipper as the same is drawn forwardly during a filling operation.

It is an object of this invention to construct an improved type of excavating dipper wherein means are provided for controlling and effecting the filling and the dumping operations.

Another object of the invention is to provide an excavating dipper adapted to be held in digging position by a boom frame, when necessary.

It is also an object of the invention to provide an excavating dipper with an inclined back to facilitate latching of the dipper door.

A further object of the invention is the construction of a dipper with a pivoted back door for discharging the contents of the dipper, said door having mounted thereon improved locking means under the control of an operator for effectively holding the dip per against premature opening.

It is furthermore an object of this invention to construct a dipper with an inclined back to facilitate closing of a pivoted door and automatic locking of the same by latching means mounted on said door.

Still another object of the invention is the construction of an excavating dipper adapted to be dragged forwardly away from the power driving mechanism during a filling operation, and having a rear door latching mechanism adapted to be released to permit discharge of the contents of the dipper when the dipper has been filled and elevated.

It is an important object of this invention to provide an improved excavating dipper of simple and effective construction and adapted to have the pivoted rear door there Specification of Letters Patent.

Patented June 8, 1920.

1919. Serial No. 290,737.

of released by unlatching a pivoted locking device on said door.

Other and further important objects of this invention will be apparent from the disclosures in the specification and drawings. The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a side elevation of an excavating machine equipped with an improved dipper shown in a filling position.

Fig. 2 is a side elevation of the excavating machine showing the dipper in dumping position.

Fig. 3 is a top plan view of the excavating machine.

Fig. 4 is a side elevation of the boom frame detached from the machine.

Fig. 5 is a bottom plan thereof with parts broken away.

Fig. 6 is an enlarged side view of the dipper with the door in closed position.

Fig. 7 is a detail side and top view of one of the door supporting brackets.

Fig. 8 is a detail side and rear view of one of the hanging brackets for the door.

Fig. 9 is a detail front and side elevation of the door closing bracket.

Fig. 10 is a side elevation of the dipper showing the door in open position.

Fig. 11 shows a detail top and side view of one of the adjustable bail bars.

Fig. 12 is a top plan view of the dipper.

Fig. 13 is a rear elevation of the dipper with the door closed and showing the door latching mechanism in open position.

Fig. 1a is a similar view showing the door latching mechanism in locked position.

Fig. 15 is a rear view of the dipper with the door removed.

Fig. 16 is a front view of the dipper, with parts omitted.

As shown on the drawings:

The excavating machine or derrick with which the improved dipper or bucket is used may be of any suitable construction. but preferably of a form as shown in Figs. 1 and 2, wherein the reference numeral 1, indicates an engine or power cab which is revolu bl v mounted on a supporting chassis or truck 2. equipped with caterpillar treads 3. Pivotally mounted on the front end of the power cab 1, is a boom frame 4, adapted to be raised and lowered. Mounted upon the bottom of windlass equipped with drums 9, and 11,

on. which cables are wound for operating the boom 4, and a dipper or bucket suspended at the outer end thereof. The power mechanism is also connected to operate the caterpillar treads for the purpose of moving the excavator from place to place. Suitable mechanisms are also provided for'rot'ating the cab and boom on the excavator chassis so that the dipper at the end of the boom may be swung circularly. A pair of supporting frames 12, are mounted upon the floor of the cab 1, and extend upwardly through the cab roof and support a shaft 13', on which a plurality of pulley wheels or sheaves 14, are rotatably mounted, and around which is trained a cable 15. The cable 15 is also engaged around sheaves 16, rotatably mounted on a short shaft 17, held in position near the outer end of the boom by means of a pair of bars 18, the forward ends of which are engaged on the projecting ends of a shaft or axle 19, supported transversely in the outer end of the boom 4-. The cable 15, has one end thereof attached to the stub shaft 17, and the other end passes down into the cab 1, and is wound on the drum 9, so that the outer end of the boom may be held in any desired adjusted position of elevation, a'iid' may be raised or lowered by the operation of the drum 9.

The outer end of the boom l, is provided with an opening 20, to permit a pulley wheel or sheave 21, to be rotatably mounted on the middle portion of theshaft 19. Another cable 22, is wound on the second drum 1(), and extends from said drum outwardly over the sheave 21, at the end of the boom.

The outer end of the cable 22, is attached to the middle reduced portion 23, of a U- shaped arm or bail 24, to which the excavating dipper is connected.

The excavating bucket or dipper comprises a bottom platep25, having side plates 26, integrally formed at right angles to the side edges thereof. The side plates 26, are trapezoidal in shape with the front and rear edges converging upwardly, as shown in Figs. 6 and 10. Extending transversely across and secured to the bottom of the front or mouth end of the dipper bottom pla'te25, is a reinforcing mouth piece plate or strip 27, the ends 28, ofwvhich are bent upwardly at right angles and are bolted or riveted to the lower front corners of the side plates 26. Rigidly secured to the upturned end plates '28, of the reinforcing strip 27, are apertured bracket plates 29, which are spaced from said end plates 28, to receive the apertured ends of the bail 2%, between the bracket plates 29, and the end plates 28, as shown in Fig. 12. Pivot pins or bolts 30, hold the bail pivotally attached to the dipper sides. Secured upon the bail earn-e apair of'angle brackets 31, to each of which is pivotally attached one bifurcated end of an adjustable connecting .rod, liar or li1ik'32, the other bifurcated end of which is removably attached to the upper front portion of one of the side plates 26. A plurality of openings or apertures 33, are provided in the upper front corners of each of the side plates 26, to permit adjustable attachment of the inner ends of the links 32, to said dipper side plhtes; By adjusting the inner ends ofthe links 32, the bail may be adjusted;

Securely mounted upon the inner surface of'the dipper bottom plate 25, and at the front edge thereof,-area plurality'of spaced prongs or teeth 34, which extend forwardly beyond the frontedge of thebot-tom plate 25, and are bent downwardly and sharpened at their forward cutting edges to permit engagement into material to be taken up by the dipper as it is drawn forwardly away from the cab 1, by means of the bail 24c, and the cable 22. Rigidl'y secured centrally and longitudinally upon the bottom or outer surface of the dipper bottom plate 25, is a brace 01" reinforcing bar 35. Also rigidly secured upon the bottom surface of the bottom plate 25, and near the sides thereof are a pair of parallel runners or sl1oes3'6 the forward ends of which are inclined upwardly toward said bottom plate 25, as clearly shown in Figs. 6 and 10; v Thefront end and the front half of the top of the dipper are open, while the rear portion of the top of the dipper is closed by means of a top plate 37, the" ends of which are bent downwardly and secured to the inner' surface of the dipper side plates 26, by rivets or other suitable means. Rigidly attached to the outer surface near the upper front corner of each of the side plates 26, is an apertured upwardly projecting sup porting plate 38. Rotatabl'y supported on the plates 38, is a roller'39, which extends transversely across the open front portion of the dipper top.

in inverted T-bar 40, is rigidly secured across the top of the front portion of the top plate 37, toreinforce the same. Rigidly attached to the upper surface of the top plate 37, and longitudinally of the dipper are a plurality of parallel door supporting brackets 41, provided with integral attachmg flanges 42, and havmg openings 43, in the projectlng ends thereof, which protrude rearwardly beyond the rear edge of the top plate. Projecting through the openings 43', of the brackets 41, is a shaft 44, upon which a dipper door 45, is pivotally mounted by means of a plurality of hanging brackets 46, having apertured heads 47. The brackets 46, are rigidly secured to the outer surface and across the upper end of the door 45, ith the bracket heads projecting above the upper edge of the door and engaged on the door shaft 44. Also rigidly attached to the outer surface of the door 45, midway between the two middle brackets 46, is a one-piece elbow bracket embrac ing an apertured body 47, and integral arms 46 and 49. The arm 49, is attached to the door 45, while the arm 48, projects rearwardly and has one end of a main chain 50, connected to the free end thereof. The other end of the main chain 50, is attached to one end of a controlling cable 51, which has the other end thereof wound around th windlass drum 11, in the cab 1.

The locking mechanism for the dipper door is mounted on the outer surface thereof and embraces a latch or looking bar 52, pivotally mounted at its center on a pin 53, supported by the door 45, and a metal strap 54, secured thereon and engaged around said latching bar. The ends of the latching bar project beyond the sides of the dipper to permit the bar to removably engage in the notches of locking plates and 56, secured on the side plates 26', and projecting rear ardly beyond the rear edges of said side plates. The locking plate 55, is mounted farther from the bottom of the dipper than the locking plate 56, and has a down- "ardly opening notch 57, therein for receiving one end of the latch bar 52. The locking plate 56, which is nearer the bottom of the dipper is provided with an upwardly opening notch for receiving the other end of the latch bar, A guide strap 58, is mounted on the lower portion of the door 45, around one end of the latch bar Another guide strap 59, is mounted on the door 45, for guiding the other end of the latch bar. Pivotally mounted between the upper portion of the strap 59, and the door 45, is one end of a lock lever 60, which is connected. to the,latch bar by a link 61. A guide strap 62, is mounted on the door 45, for limiting the throw of the lock lever 60. A lug or handle 63, is integrally formed on the free end of the lever 60, and hascoir nected thereto one end of an auxiliary or tripping chain 64, the other end of which is connected to the cable 51, by means of a connecting bar 65.

The operation is as follows:

The excavating machine may be moved over the ground by means of the caterpillar treads 3, which are operable by the power mechanism in the cab 1. The power mechanism is also adapted to rotate the cab 1, on the chassis or machine frame 2, and there by swing the boom around in a circle. The boom 4, may be raised or lowered by mean; of the windlass drum 9 and the cable 15, to raise or lower the dipper. It is customary, however, to set the boom at a convenient elevation and then arise and lower the dipper by winding and unwinding the cable .32, on the drum 10.

As shown in Fig. 1, the cab 1 and boom 4, have been rotated to a position at right angles to the direction of movement of the excavating machine, and the boom 4, has been lowered by means of the cable 15, to position the dipper on the ground in position to be filled. As the dipper is lowered by the cable 22, the cable 51, draws the dipper toward the cab 1, and the chain 50, is tensioned to cause the door to slam shut by its own weight and by gravity into an inclined closed position against the rear inclined edges of the dipper side plates 26. ll ith the closing of the door the latch bar 52, strikes the inclined edges of the locking plates 55 and 56, and swings on the pivot pin 53, to permit the door to close against the rear edges of the dipper plates. When the door is closed the latch bar 52, is pivoted automatically by means of the weight of the locking members and 61, connected with one end of the latch bar, which is moved into a horizontal locking position with the ends thereof seating in the notches provided for the purpose in the locking plates 55 and 56, as shown in Fig. 14.

To fill the dipper the drum 10, is rotated to wind up the cable 22, which may pass over the boom shoe roller 7, if the boom is low enough. lVinding up of the cable 22, causes the dipper to be drawn forwardly away from the cab 1, and the dipper teeth 34, engage and loosen up the ground or ma terial with which the dipper is to be filled. The dipper shoes 36, track on the ground during a filling operation and act to elevate the rear end'of the dipper to throw the weight on the dipper teeth. lVhen the material to be removed by the dipper is exceptionally hard and it is difiicult for the dipper teeth 34, to engage and loosen up the same, the boom 4, is lowered into a position to lower the draft on the dipper, and in extreme cases the boom is lowered farther into a position wherein the bottom plate 6, of the boom shoe 5, rests upon the dipper roller 39, and the drag cable 22, passes over the boom shoe-roller 7. In this position of the boom the boom shoe co-acts with the clipper andserves to hold the dipper teeth 34, in engagement with the hard material, so that the material may be broken up and enter the dipper, as the dipper is pulled forwardly away from the machine cab 1. During the filling of the dipper the door controlling cable 51, is slack.

To dump the dipper'when filled the boom at, is first elevated bv winding up the cable 15, on the drum 9, thereby permitting the dipper to swing outwardly and be suspended from the end of the boom with the closed door 45, lowermost and the dipper bottom assuming a vertical position. The dipper is thus held suspended by the bail 24. The cab 1, together with the boom 4, is then swung around to the dumping position, as shown in Fig. 2, with the filled dipper disposed directly above an open freight car or over a spoil bank 66. The cable 51, which is slack, is next tensioned by winding the same on the drum 11, this tensioning of the cable 51, also acts to exert a pull on the tripping or look releasing chain 64:, which in turn pulls the locking lever 60, away from the lower edge of the door and by means of the connecting link 61, acts to pivotally swing the latch. bar out of engagement with the notches of the locking plates 55 and 56. This movement of the latch bar 52, unlocks the door 45, which swings downwardly into open position, as shown in Fig. 2, and permits the contents of the dipper to discharge into the freight car 66.

After a dumping operation the cable 51, is wound up to draw the dipper toward the cab 1, and the cables 15 and 22 are released topermit lowering of the boom and the dipper. With the lowering and drawing back of the dipper the chain 50, acts on the dipper arm 48, to slam the door shut and permit locking thereof by the latch bar 52. As the boom is lowered it is simultaneously swung into an excavating position. As the dipper is drawn rearwardly and strikes the ground it assumes a substantially horizontal position and the door 45, is automatically moved into closed position by the tensioned chain 50, and is automatically locked as hereinbefore described. It will be noted that the rear edge of the dipper side plates are inclined, this arrangement facilitating automatic closing of the door. Should the door for any reason fail to close by its own weight and by gravity the cable 51, may be tensioned and exert a pull on the chain 50, which in turn will cause the door elbow member 48-49, to slam the door shut. The cable 51, is slackened during the filling operation of the dipper. The point of drag or suspension of the dipper may be varied by adjusting the bail rods 32, in the various apertures 33, provided in the dipper side plates 26.

v I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do and av tripping chain connected with said cable and lever for actuating said lever to swing said latch bar out of engagement with said notch plates to unlock the door.

2. An excavating dipper having a door for closing one end thereof, a drag cable connected to the other end of the dipper, a. fulcrumed latch bar extending across the door, locking members on the -dipper adapt ed to receive the latch bar to hold the door locked in closed position, and a releasing chain for the door connected to one end of the latch bar and adapted toautomatically swing the latch bar into locking engagement when the door falls into closed position.

3. The combination with an excavating dipper, of a pivoted door for closing one end thereof, a cable attached to one end of said dipper for drawing the same forwardly to fill the same, and a second cable attached to the door for closing the same after a dumping operation and drawing the dipper back into filling position.

4. The combination with an excavating dipper, of a bail adjustably mounted on one end of the dipper, a drag cable attached to said bail for drawing the dipper forwardly to fill the same, a pivoted door for closing the other end of the dipper, and a second cable attached to the door for closing the same after a dumping operation of the dipper and further adapted to simultaneously draw the closed dipper rearwardly into a filling position.

5. An excavating dipper having a bail adjustably attached to one end thereof, a drag cable connected to said bail for drawing the dipper forwardly to fill the same, a door pivotally mounted at the other end of the dipper, a locking mechanism on said door, and means connected to said door and to said locking mechanism adapted to be tensioned to release the locking mechanism to permit opening of the door when the dipper is in dumping position and further adapted to drag the dipper rearwardly into a filling position and simultaneously shut the door.

6. The combination with an excavating dipper, of a door pivoted thereon for closing one end thereof, a locking mechanism for said door, and a cable connected with said door and with said locking mechanism for releasing the locking mechanism to open the door When the dipper is in discharging position, said cable further adapted to close the door and draw the dipper into a filling position after discharge of the contents thereof.

7. The combination with an excavating dipper, of a door pivoted thereon for closing one end thereof, a locking mechanism for the door, a cable, a chain connected to said cable and to said door for closing the door and dragging the dipper rearwardly into a filling position, and a tripping chain con nected to said cable and to said locking mechanism adapted to be tensioned by the cable when the dipper is in dumping posi tion to cause release of the locking mecha nism and opening of the door.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing Witnesses.

MORTON E. PUGH.

Witnesses:

FRED E. PAESLER, CHARLES V. HILLS, Jr.

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