US2003900A - Excavating apparatus - Google Patents

Description

June 4, 1935. J. W.'PAGE EXCAVATING APPARATUS Filed April 7, 1934 2 Sheets-Sheet 1 June 4, 1935. J. w. PAGE EXCAVATING APPARATUS Filed April 7, 1934 2 Sheets-Sheet 2 Patented June 4, 1935 UNITED STATES PATENT OFFICE 2,003,900 EXCAVATING APPARATUS J olinW. Page, Chicago, Ill. Application April 7, 1934, Serial No.-719,549 3' Claims. (01. 21 138) This invention relates to improvements in excavating apparatus and, more particularly, to that type embodying a boom and dipper stick, the latter carrying at its end a bucket, hoe, or equivalent element for digging, scraping, cutting, excavating, or the like.

Among the features of my invention is the extension of the boom beyond the hinge of the dipper stick, with all portions of the boom line that reach the end of the boom extended substantially to the end of the dipper stick, so that all of the lift on the boom is transmitted through the dipper stick. By this arrangement, the extension of the boom beyond the hinge point may be relatively short and good control of the bucket is obtained with a reduced tendency to jack-knife.

The bucket may be rigidly attached to the end of the dipper stick or hinged thereon.

Other features and advantages of my invention will appear more fully as I proceed with my specification.

In those forms of devices embodying the features of my invention shown in the accompanying drawings- Figure 1 is a view in side elevation of a device with the bucket rigidly attached to the dipper stick; Fig. 2 is a diagrammatic view in front elevation showing the reeving of the boom line; Fig. 3 is a view similar to Fig. 1, showing the bucket hinged to the end of the dipper stick; and Fig. 4 is a View similar to Fig. 2, showing the reeving of boom line of the device of Fig. 3.

As shown in the drawings, the apparatus includes a suitable platform ID, preferably mounted on traction members I I, and carrying suitable machinery (not shown) adapted to operate the winches I2 and I3 for controlling the boom line I4 and the drag line or loading line I5, respectively.

The platform I carries a mast or upright I6 supported by bracing members l1, l1. Hinged to the platform at I8 is a boom I9. Near its end, the boom has hinged at 20 on its underside one end of a dipper stick 2|. 22 and 23 are stops to limit the outward swing of the dipper stick with respect to the boom. There are two sheaves 24, 24 at the top of the mast I6, and three sheaves 25, 25, 25 at the end of the boom I9. 1 As thus far described, the two devices shown are substantially the same.

I shall now describe further the device of Figs. 1 and 2 with the bucket rigidly attached to the end of the dipper stick. As here shown, the bucket is indicated by 26 and may be of a more or less conventional shape, with a bottom,

sides and back, the'front or digging end being left open. The bucket is rigidly attached to the lower or free end of the dipper stick by the bolts or rivets 21, 27.

The boom line I4 is reeved over the sheaves 24 and 25 and over a sheave 28 fastened to the bucket 26. The outer end of the line I4 is attached to the bucket at 29. In this manner, I all portions or strands or reaches line I I that reach the end of the boom are extended substantially to the end of the dipper stick, so that all of the lift on the boom is transmitted through the dipper stick. As here shown, the attachment of the boom line to the end of the dipper stick is effected by its attachment to the bucket, the latter being fastened to the end of the dipper stick.

The loading line I is fastened to the front of the boom of the bucket 25 by the bridle chains 3|] and preferably passes between the guide pulleys 3I, 32 at the bottom of the mast and over the guide pulley 33 carried by the boom.

In operation, the movements of the bucket and boom are controlled by the lines I4 and I5.

In the device of Figs. 3 and 4, the bucket I26 resembles, in general, a Page bucket and is hinged to the free end of the dipper stick at I21. The boom line I4 is reeved over the sheaves 24 and 25 and over a sheave I28 attached to a short lever I5fi pivoted at I5I near the free end of the dipper stick 2|. The outer end of the line I 4 is attached at I29 to the cage carrying the sheave I28. The free end of the lever I50 is attached by a chain I52 to a pair of angle 35 irons I53 fastened on the top of the bucket. A plurality of holes I54 in these angle irons permit fastening of the chain at different points more or less removed from the pivot I21. Here,

again, all portions or strands or reaches of the boom line I I that reach the end of the boom are extended substantially to the end of the dipper stick, so that all of the lift on the boom is transmitted through the dipper stick. Here,

however, the attachment of the boom line to the end of the dipper stick is accomplished through the lever I and through the chain I52 and bucket, the lever being attached to the stick at I5I and the bucket at I21. of the line I I to the bucket through the lever I50 and chain I52 causes tension on this line to tend to rock the bucket on its pivot I5I.

The loading line I5 is fastened to the front The attachment 50 of the bucket I26 by the bridle chains I30 and 55 embodiments of my invention, it is to be under-- stood that it is capable of many modifications. Changes, therefore, in the construction and'arrangement may be made without departing from the spirit and scope of the invention'as' disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as permissible; in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is:

1. Excavating apparatus of the character described, including: a boom; a dipper stick with one end hinged to the boom at a point removed from the end of the boom; a bucket hinged to the free end of the dipper stick; a loading line attached to the bucket; a lever hinged to the dipper stick near the bucket; a connection between said lever and the bucket; and a boom line extending over the end of the boom with its outer end attached to said lever.

2. Apparatus as claimed in claim 1, in which the boom line is reeved over the end of the andinwhich all portions of the boom line that reach the end of the boom are extended andattached to said lever.

3. Apparatus as claimed in claim 1, in which the connection between the lever and the bucket is adjustable.

JOHN W. PAGE.

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