US1064121A - Excavator. - Google Patents

Description

A. G. BANSMBR.

EXGAVATOR.

APPLICATION nun NOV. 8, 1912.

Patented June 10,1913.

' W] T NESSE WW.

ADOLPH G. BANSMER, L BROOKLYN, NEW YORK.

EXCAVA'TOR.

Specification of Letters Patent.

Patented'June 10, 1913.

Application filed November 8, 1912. Serial No. 730,229.

To all whom it may concern:

. Be it known that I, Aoonrrr G. Baxsnnn, a subject of the Emperor of Germany, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Excavators, of which the follow ing is a full, clear, and exact specification.

This invention relates to excavators and its principal object is to provide improved means for automatically dumping the bucket when it has been raised to the desired level.

Other objects will become apparent in the course of the following description.

The invention will be first fully described with reference to the accompanying drawings, which form a part of this specification, and then pointed out in the claims at the end of :the description.

In the drawings, wherein similar numerals of reference indicate corresponding parts in each of the several views, Figure l is a side elevation of an excavator embody" ing the invention, showing the scraping and dumping positions in full and dotted lines respectively; Fig. 2 is an enlarged side elevation of the carriage and adjacent portions of the boom and dipper arm to more clearly illustrate the brake for clamping the car- 0 a'iage to the boom; and Fig. 3 is a cross section on the line 3-3 of Fig. 2.

The excavator here illustrated as an example of the invention may consist of a mastfl, mounted upon a turntable 2, and "secured by guy ropes 3 or other suitable braces. A boom 4 is hinged at its lower ,end to the lower end portion of the mast, and the boom is constructed with longi- :tudinal tracks 5, along its lower and upper edges, for the travel of the main rollers of the carriage. The boom is preferably made I-shaped in cross section, as shown best in Fig. 3, and to the upper end of said boom there are secured brackets 6 between which.

across bar 8 is secured to the brackets, and

to the upper end of said cross-bar there is pivoted an arm 9 carrying a sheave 10, at

its free end. A cable 11, one end of which ,issecured to a block 12, at the upper end of the mast, is passed around said pulley 10,

overa sheave 13, on the block, and thence extends down the mast to be connected with the operating engine (not shown). A seeend cable 14; passes over the sheave -7, and

has one end secured to the lower end of the is journaled a-sheave 7. Beyond the sheave I cross bar 8, that portion of the cable between the crossbar 8 and pulley 7, being passed around a sheave 15, mounted on a bail 16, pivoted to and projecting forward from the front end of the bucket or dipper l7 and a sheave l5 mounted on the cross bar From the sheave 7 the cable 14 passes to a sh ave 18. on the mast and thence-to the operating engine.

The bucket or scoop 17 is carried by the lower end of a dipper arm 19, and the bottom of the bucket constitutes a door 20, which controls the discharge of the matcrial taken up by the bucket. Said door is hung upon overhanging hinges 21, pivoted upon the rear wall of the bucket, and carries a sliding bolt 20, at its free forward edge adapted to engage a keeper 21, on the bottom of the bucket for holding thedoor n0rmally closed. A cable or chain 22 is attached to the bolt at one end and to the upper portion of the bail 6, at the other end, the intermediate portion of said cable or chain being passed over a sheave 29.. The length of the cable or chain is such as to allow the bolt to engage the keeper when the bucket is in its lowered position for scraping, and to release the bolt from said keeper when the bucket is raised to the desired elevation by reason of the angle between the bail and dipper arm being increased, as said bucket is raised, whereby the dumping of the contents of the bucket is accomplished automatically. The upper end of the dipper arm 19 is secured to a pivot pin or rock shaft 2, rotatably mounted on the carriage which may consist of side plates 24:, arranged at opposite sides of the boom and secured to stirrups or hangers 25, extending under the boom and up close to the sides thereof, to furnish bearings for the main supporting rollers or wheels 26, and retaining rollers 27, arranged respectively above and below the tracks 5, as best illustrated in Fig. 3. The rock shaft or pivot pin 23 projects beyond one or both of the side plates 24 of the carriage and has mounted thereon, so as to turn with the dipper arm, an eccentric or eccentrics 30, which bear against the lower end of brake levers 31. Said levers are pivoted intermediate of their ends to the carriage, as at 31', and'at their upper ends are pivotallyconnected to links 32, which, extend downwardly and forwardly between the sides of the carriage and the boom and have their lower ends pivoted to and flexible means of connection extending name to this specification in the presence of between sand locklng means and arm swulgtwo attestlng wnnesses.

mg means and passed over said sheave for ADOI PH BAN MER automatically unlocklng the closure when J S 5 the arm has been raised a predetermined Witnesses:

distance. FRANK G. QUINN,

In testimony whereof I have signed my J. M. LARSEN.

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