US1185427A - Power-shovel. - Google Patents

Description

E. MOORE.

POWER SHOVEL.

APPLICATION FILED SEPT. a. 1912.

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1,185,427. Patented m 30,1916.- V

WILLIAM'E. MOORE, orrrrrsiaunsn, PENNSYLVANIA.

' POWER-SHOVEL.

Specification of Letters Patent.

Patented May 30, 1916,

Application filed September 3, 1912. Serial No. 718,436.

To aZZwhom it may concern: Y V

Be it known that I, VILLIAM E. MooRE, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Power-Shovels, of which the following is a specification.

This invention has for its object the provision of improved means for supporting and manipulating the scooping member of the shovel known in practice as the dipper, whereby a wider range of operations, greater nicety of control, ease of transportation,

and celerity of movements may be attained,

l the said shovel being capable of working in per handle which comprises two channel irons 8 and 9 rigidly connected by side latan. extremely limited radial and vertical clearance.

Other objects andadvantages of the said invention'will more fully appear from the following description, in which reference will be had to the accompanying drawings, wherein, Figure 1 is a side elevation showing one embodiment of my said invention,an'd Fig. 2 a top plan view thereof.

Inthe accompanying drawings, 1 representsa car truck or running gear, of any desired description on which is mounted a rotatable-cab 2, which we may assume is of well known construction, being rotatable by means of power driven pinion 3 meshing with: a circular rack 4, the said cab resting on rollers 5 which travel on a circular track 6. v

The present invention is not concerned with the construction of the cab or the mode of manipulating the same, so that these features need not be here described in detail. 7

Referring now to the parts which have more particularly to do with my invention, these include in the case shown, among other parts, a dipper 7, which,'having no need for 'a swinging bottom, is preferably permanently closed, except at its upper open ng or mouth. This dipper is carried by a (11ptice braces 10, and this handle is initurn supported for longitudinal or telescopic movement in a rocking cradle or cantaliver frame comprising two parallel side frames 11 and l2 suitably braced at four points by shafts or rods 13, 14,- '15 and 16 as shown. 7

The dipper handle travels longitudinally between two rollers 17 and 18 mounted respectlvelyon the shafts 13 and 14 of the tilting cradle, the dipper handle resting and travelmg upon the roller 17 alone. The Weight of the dlpper andfother parts on the left (Fig 1) of the pivoted point of the cradleis sufiiclent, however, to prevent an ,overbalanclng of the dipperon saidpivot in the wrong direction.- This cradle itself is 16 as a, pivot, and this shaft is mounted at or near the outer, ends of two arms 32 and 33, whlch together we shall call the 'boom mounted between its ends to rock on shaft of the shovel. These arms are pivotally supe ported in two brackets 34 and 35 respectively, made fast to the cab 2, and may be cross braced as shown. Unlike other shovels of which applicant 1s aware, the dipper of the present one is angularly movable around an axis extending longitudinally of its handle, so that it may .be rotated to dump its contents or to any angle to accommodate it to a' desired out. For the said dipper, the same is madefast to a shaft 19 extending, in the case shown, the length of the dipper handle and carrying at its end opposite said dipper, which meshes through suitable intermediate gears 21 and 22 with a. pinion 23 fasten a shaft '24, journaled in suitable brackets 25 and'26 mounted on the dipper handle at or 1 near each end thereof as shown. This shaft 24 is square in cross section between its purpose of thus manipulating the a gear 20 fast thereon,

bearings, and extends. through a square opening in gear 27 which it fits in such manner as to permit relative movement between .the gear and shaft longitudinally of the-latter, but so as to prevent relativev rotary movement between these parts.

The gear 27 meshes w1th a pmion 28 on thearmature shaftof an electric motor 29, made fastin any suitable way to the'tilting cradle. The

gear 27 may be held against movement longitudinally of shaft 24 by being mounted be'seen' that by means of the motor 24, operating through the train of gears described, any desired an ular movement may be imparted to the dipper about the longitudinal axis of its stem 19.

For the purposebof instantly stopping the motor 29 at the desired point, it may be provided with any suitable brake mechanism which I have indicated at 31, which we may assume is of several well known forms of electro-magnetic brakes. The motor 29 would in practice, be operated from a controller located in the cab, but since no specific arrangement of these circuits is hereby claimed as a part of this invention, theseneed not be shown nor further described. 1

do not, however, limit my invention to an electric motor for driving shaft 2%, since this may be driven by any desired form of motor or engine.

The boom is held up, raised and lowered on its pivot, by means of a cable 36, the end of which is made fast in any suitable way on sheave support 37 the cable passing thence over sheave 38 2) onshaft 16, sheave 89 anchored within the cab (Fig. 1) thence over sheave 4L0 also on the shaft 16, sheave 41 in the cab, to the winding drum 42 in the cab.

The cradle is rocked on its pivot 16 by a cable 4:3 made fast at one end as at l i, then passing successively over sheaves e5, e6, e7, 4E8, 49, 50 and 51, thence to winding drum 52. The sheaves 4L5, l7, 49 and 51 are mounted on shaft 15, while sheaves a6, 18 and 50 are mounted on shaft 53 mounted in brackets 54:, 55 fast to the lower portion of the front of the cab.

The dipper handle is moved longitudinally in the cradle or racked by means of two cables 56 and 57 made fast respectively to opposite ends of the dipper handle as at 58 and 59 and passing over sheaves 60, 61, 62 and 63 to a winding drum 6a in the cab. When this drum is rotated in one direction, it will wind in on one of said cables and to a corresponding extent wind out on the other, thereby pulling on the points 58 and 59 to impart longitudinal movement to the dipper handle in the cradle in either direction depending on the direction of rotation of the drum 6 L.

The drums 42, 52 and 64, I have indicated merely in outline, since these may be of any well known or desired kind, and may be operated by steam or electric power in the usual or any desired way. In Fig. 2, the cables are omitted for the sake of clearness in the drawing.

The mechanism herein shown and described for supporting and manipulating the dipper possesses many practical advantages. The cantaliver mechanism and unusually short boom permit the shovel to be worked within very narrow or limited radial and vertical clearances, which is a great advantage especially when the device is employed as a ditcher on trolley lines where the overhead trolley wire or other wires often limit the operation of long boom shovels.

If used in loading ballast or excavating cuts, my improved shovel may be operated in much narrower cuts and more confined or restricted places than may be done with the usual long boom shovel.

The rotary tilting of the dipper is advantageous not only in providing a simple and expeditious way ofdumping the material, but it has the additional advantage that when the cab is turned to an angle with the track, as for example, when the shovel is being used to scoop out a ditch along a railway track, the dipper may be so rotated as to cut parallel to the track, something which cannot be done with the common form of ditcher.

This shovel is also admirably adapted to be driven under its own power from place to place and to drive and load cars on both sides of it, that is, the shovel may be coupled in between the cars; its dipper supporting mechanism being such as to form no obstruction to the adjacent cars, and when traveling from place to place on a railway track, for example, the boom may be swung into line with the track so as stacles along the right of way, but even if allowed to remain at an angle to the track, the boom is so short that this may be done in many instances with safety. With an arrangement of this kind, the boom may be raised vertically and the dipper handle run back substantially horizon-tally into the cab, thereby not only housing a considerable portion of the mechanism, but this gets it well out of the way when unloading or when traveling for any considerable dis tance along the track.

The propelling of power shovels under their own power from place to place is an old and well known expedient in the art, so need not be here described in detail.

lVh-ile I have herein shown but one specific embodiment of my invention, it should be understood that various structural modifications thereof may be made without departing from the spirit of the invention and I do not therefore confine myself to the specific constructional details shown.

VVha-t I claim is:

1. A power shovel comprising a supporting structure, a boom pivotally connected thereto, a cradle pivotally mounted intermediate of its ends upon the outer end of said boom, said cradle comprising two side frames and upper and lower cross members embraced between said side frames, the lower of said cross members being located in advance of the upper one, a dipper, a handle for said dipper extending between said upper and lower cross members and between said side frames, and supported upon the lower of said cross members, and means attached to said cradle on the opposite side of its pivotal point of support from the forto clear obward of said cross members, cradle on its as described.

2. A power shovel comprising a supporting structure, a boom pivotally connected thereto, a cradle pivotally mounted intermediate of its ends upon the outer end of said boom, said cradle comprising two side frames and upper and lower rollers embraced between said side frames, the lower roller being located in advance of the upper one, a dipper, a handle for said dipper extending between said upper and'lower rollers and between saidside frames, and supported upon the lower of said rollers, and means attached to said cradle on the 0ppo site side of its pivotal point of support from the forward roller for rocking said cradle on its pivotal support, substantially as described.

3. A power shovel comprising a supporting structure, a boom pivotally mounted for rocking said pivotal support, substantially Copies 01 this patent may be obtained for five cents each, by addressing the thereon, a cradle pivoted on said boom, a dipper, a handle for said dipper, a shaft supported in said handle and connected to said dipper for rotating the same around an axis extending longitudinally of said handle, a driving shaft connected to said handle and adapted to move therewith 1ongitudinally of said cradle, gearing forming a driving connection between said shafts, a gear connected to said driving shaft to positively rotate therewith, but permitting said shaft to move longitudinally thereof, andv a motor mounted on said cradle and adapted to drive said gear for rotating said dipper. f

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM E. VMOORE.

Witnesses:

H. L. MITCHELL, E. M. BALSINGER.

Washington, D. 0.

Commissioner of Patents,

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