US544479A - And ernest - Google Patents

Description

No Model.) 2 Sheets-Sheet 1.

W. & E. J. DAV-Y. MEANS FOR OPERATING SWINGING BEAMS 0F EXOAVATING MACHINES;

No. 544,479. Patented Aug. 13, 1895.

(No Model.) 2 Sheets-Sheet 2.

W. 81: E. J. DAVY. MEANS FOR OPERATING SWINGING BEAMS 0F EXGAVATING MACHINES.

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Patented Aug. 13,

UNITE STATES PAT NT v Fete-n1. 1

WILLIAM DAVY, or KENOSHA, WISCONSIN, AND ERNEST J. DAVY, or

CHICAGO, ILLINOIS.

MEANS FOR OPERATING SWlNGlNG BEAMS 0F EXCAVATlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 544,479, dated August 13, 1895.

Application filed June 22,1895. Serial 110.553.71 5. (Nomodeh) To all whom it may concern.-

Be it known that we, WILLIAM DAVY, residing at Kenosha, in the countyof Kenosha and State of Wisconsin, and ERNEST J. DAVY, residing at Chicago, in the county of Cook and State of Illinois, citizens of the United States, have invented a new and useful Improvement in Operating Means for the Swinging Beam of Excavating and'Analogous Machines, of which the following is a specification.

Our invention relates to an improvement in the class of machines, including those for excavating, as in building sewers, for hoisting, loading, dredging, and the like, in which a swinging extension-beam or boom, as it is commonly termed, and which term is hereinafter used to designate it, is employed for suspending upon it the traveling scoop or scraper for the excavating purpose or other forms of implement for the various purposes of such machines, to adapt it to be'carried back and forth between the points of loading and dumping by swinging the boom. In heavy machinery of the class referred to this boom is of such greatweight that an engine is required to swing it, being properly connected for the purpose with the boom and controlled through the medium' of clutch mechanism to permit the reversal of the direction of movement of the boom while the drive-shaft of the engine continues to rotate in the same direction, or through the medium of piston mechanism, one piston serving to swing the boom in one direction and the other to swing it in the opposite direction. The boom-swinging machinery thus hitherto employed is more or less complicated, cumbersome, and expensive.

The object of our improvement is to enable such a boom to be swung back and forth and to be readily controlled with certainty in its movements by means of a single reciprocating piston actuated by fluid-pressure and suitably geared with the pivotal boom.

Although our improvement may be used to advantage in connection with all the various machines included in the class hereinbefore outlined, we have especially devised it for use in a machine for sewer-excavation, and therefore so explain it in the description hereinafter contained and illustrate it in that excavating apparatus provided with our improvement and illustrated in operation; Fig. 2, a plan view of the same; Fig. 3, a section taken at the line 3 on Fig. 2, viewed in the direction of the arrow and enlarged; and Fig. 4, a section taken at the line 4 on Fig. 3 and viewed in the direction of the arrow.

A is a support for the mechanism, preferably in the form of a'car movable on wheelsr, the tread portions of which should be wide to prevent sinking into the soil. be equipped with machinery for driving it and for actuating the cable-winding. drums (indicated, at D D) to operate a scraper 0, connected from its forward ,or scooping end by a cable q with the drum D, and suspended at its cradle o from a boom B by a cable 19, fastened to the boom at 00, thence passing about the:pnlley 0 of the scraper-cradle, over guide-sheaves 10 and 19 provided near opposite ends of the boom, to thewinding-drum D. The machinery referred to may be that commonly used on cars employed for the purpose to which our invention relates and forms no partof ourinvention. Hence it is not illustrated in the drawings, though the stack n is therein shown for the escape of products of combustion from the steam-generating furnace.

The boom B, which maybe formed of a pair of channel-bars of metal fastened together in parallel relation, orin any other suitable mannor, is supported on the car-roof. to extend lengthwise thereof and projectbeyond one end of thecar, being pivoted at its inner end to swing in a horizontal plane, the pivot-pin m, which passes vertically through the boom, havingits bearing in a bracket m, fastened on the roof of the car.- Toward its outer end'the boom carries on its base rollers Z, at'which it bears on a segmental track Z, provided on the.

The car should end of a rotary shaft h, and the cable 2' passes over a horizontalguidepulley"i' at the opposite side of the car and along that side to the rear of the car, where it is returned, about a vertical guide-pulley 1' to a drum E' on the opposite end of the shaft h, and about which the cable winds oppositely of the winding of the cable k on the drum E. The rotary shaft is supported in bearings afforded in brackets h, depending from the roof of the car and supporting between them, at their lower ends, a guide-roller h Thus the shaft extends transversely through the car and projects beyond the sides of the latter near its roof, the projecting ends carrying, respectively, the drums E and E, and at its center, between the brackets h, the shaft carries a pinion f.

F is the fluid-actuated piston device. It comprises a cylinder 6, rigidly fastened to the beams of the car-roof to extend longitudinally of the car, with its center in alignment with that of the space between the pinion f and roller 7L2, a piston e in the cylinder, having its rod 6 extended intoarack 0 which passes through the aforesaid space to be guided by the roller 7 and mesh with the pinion f; inlets and outlets d d in the cylinder beyond the limits of stroke of the piston and connected by a fluid-supply pipe (preferably steam) d receiving its supply at o, and containing near its junctions with the openings at and d the three-way valves 01 and d of any usual or suitable construction (hence not shown in detail) and relatively so set that when one is opened to the pipe d the other is closed thereto and opened to the exhaust; and c is the exhaust-pipe,discharging at "u" and connecting the exhaust'sides of the two valves, which are provided on their stems with handles t and 25 connected by a rod t, which is engaged at its free end in the slot b of an operating-lever b, fulcrumed at one end to the roof of the car, as shown at s.

The operation is as follows: Suppose the apparatus to be employed in excavating a sewer along a given line on which the car A is caused to travel by its driving machinery referred to being removed, from time to time, backward with relation to or away from the work as it proceeds in the direction of movement of the car. In the act of excavating, the boom should extend parallel with the sides of the car along its center to enable the scraper O to be lowered to the line of work at which it is dragged for filling by winding the cable g on the drum D, and when filled the cable 19 is wound on the drum D, while the cable is allowed to pay out to elevate the scraper preparatory to dumping it, all in the usual or any suitable manner. When the scraper has been raised, the boom must be turned on its pivot to one side orthe other to carry the scraper to the point of dumping. It will be understood that with the boom in its position of extending lengthwise of the car the rack e engages, near its center,'with the pinion f and the piston e is then midway sition in which it is represented by full lines to that of its dotted-line representation in Fig. l, the valve (1 say, will be opened to ad mit steam from the pipe (1 into the cylinder to drive the piston toward the opening cl, and the valve (1 will thereby be opened to the ex haust-pipe to permit any steam that may be opposed to the movement of the piston to escape. Thus by the engagement of the rack with the pinion'f the shaft 71, is turned to wind the cable 70 on the drum E and unwind the cable t' from the drum E, thereby turning the boom B toward the right to carry the loaded scraper C to the point of dumping. After dumping the scraper the boom may be returned to extend along the line of the work by turning the lever 12 back past its full-line position, whereby the valve 61 is opened to admit steam to the cylinder, and the valve d isopened to exhaust from the cylinder, and the motion of the piston actuates the rack to turn the shaft 71. in the direction to effect winding of the cable 1' on the drum E and unwinding of the cable it] from the drum E. Obviously the motion of the boom may be stopped at any point by turning the lever to a point midway between the extremes of its throw indicated in Fig. 3, whereby each valve 61 and d is closed to the steam supply and exhaust.

As will therefore be seen, by our improvement we are enabled to employ as the boomactuating means fluid-pressure piston mechanism involving a single cylinder and its piston suitably geared with the boom, which is the gist of our invention, thus supplanting with a simple mechanism the more complicated, expensive, and cumbersome mechanism hitherto used for the same purpose.

What we claim as new, and desire to secure by Letters Patent, is-

1. In an apparatus of the character setforth, the combination with a support for the oper ating mechanism, and the pivotal boom thereon, of means for turning the boom comprising fluid-pressure actuated piston-mechanism fastened on said support and comprising a single cylinder and its contained piston, connections between the piston and opposite sides of the boom, whereby movement of the piston in opposite directions turns the boom back and forth, and means for controlling the supply of fluid-pressure to and its exhaust from the cylinder, substantially as described.

2. In an apparatus of the character set forth, the combination with a support for the oper-. ating mechanism and the pivotal boom thereon, of means for turning the boom comprising a rotary shaft journaled on said support and carrying winding drums at its opposite ends, cable-connections between said drums and the boom arranged to wind in contrary directions on said drums, a single cylinder fastened on said support and a piston therein geared to said shaft to turn it in opposite directions by the back and forth movements of the piston, and means for controlling the supply of fluid-pressure to and its exhaust from the cylinder, substantially as described.

3. In an apparatus of the character set forth, the combination with a support for the operating mechanism and the pivotal boom thereon, of means for turning the boom comprising a rotary shaft journaled on said support and carrying a pinion and, at its opposite ends, winding-drums, cable-connections between said drums and the boom arranged to wind in contrary directions on said drums, a single cylinder fastened on said support and a piston therein having a piston-rod provided with a rack engaging said pinion to turn the shaftin opposite directions by the back and forth movements of the piston, and means for controlling the supply of fluid-pressure to and its exhaust from the cylinder, substantially as described.

4. In an apparatus of the character set forth, the combination with a support for the operatin g mechanism and the pivotal boom thereon, of means for turning the boom comprising a rotary shaft journaled on said support and carrying winding drums at its opposite ends, cable-connections between said drums and the boom arranged to wind in contrary directions on said drums, a single cylinder fastened on said support and a piston therein geared to said shaft to turn it in opposite directions by the back and forth movements of the piston, openings in said cylinder near its opposite ends for the supply and exhaust of fluid-pressure, oppositely working three-way valves controllingsaid openings to the fluid-supply and exhaust, arod connecting said valves, and a lever engaging the rod to operate itjto turn the valves simultaneously, substantially as and for the purpose set forth.

5. In an apparatus of the character set forth, the combination with the car A for supporting the operating mechanism and the pivotal boom B thereon, of means for turning the boom comprising a rotary shaft h journaled on the car and carryinga pinion f and, at its opposite ends winding-drums E and E, at cable 7c connecting the boom from one side with the drum E and passing over guide-pulleys k and k at opposite sides of said drum, a cable 1' connecting the boom from the opposite side with the drum E and passing over guide-pulleys vi and 4? at opposite sides of said drum, a single cylinder e supported in said car and containing a piston 6 having a rod 6 provided with a rack e engaging said pinion, said cylinder having near its opposite ends exhaust and supply openings at and d for the fluid-pressure, oppositely working three-way valves 01 and d controlling said openings to the supply and exhaust, and providedwith handles ti and t on their stems, a rod t connecting said handles and a lever I) connected with the rod, the whole being constructed and arranged to operate substantially as described.

' WILLIAM DAVY.

ERNEST J. DAVY. In presence of M. J. FROST, J. H. LEE.

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