US1077544A - Tamping-machine. - Google Patents

Description

G. E. NBILSEN.

TAMPING MACHINE.

APPLICATION FILED JAN.13, 1913.

Patented N0v.4, 1913.

2 SHEETS SHEET 1.

Lvjms5es nven/ or CharZeSlE. rleilsen C. E. NBILSEN. TAMPING MACHINE. APPLICATION TILED JAN.13, 1913. 1,077,544 Patented Nov. 4, 1913.

2 SHEETSSHEET 2.

F '38 ZUJfifHesse/s Inveh/ or Charles E. Y leiZSen,

UKTE STATES PATN FEFCE.

CHARLES E. NEILSEN, OF ST. PAUL, MINNESOTA, ASSIGNOR TO CLARENCE R. WILKINSON, OF ST. PAUL, MINNESOTA.

TAMPINGr-MACHINE.

To all whom it may concern.

Be it known that 1, CHARLES E. NEILsnN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented new and useful Improvements in Tamping-Machines, of which the following is a specification.

My invention relates to improvements in tamping machines of the class in which a plurality of vertically movable tamping bars, adapted to fall by gravity, are lifted by suitable mechanism and secured in elevated positions when inoperative.

The object of my invention is to provide a machine of this kind designed to minimize the impact and friction between the working parts thereof.

A further object is to provide improved means for operatively connecting the tamping bars with or disconnecting the same from the lifting mechanism, and also to utilize said lifting mechanism as a trip to release said bars from their elevated posi-v tions.

In the accompanying drawings, Figure 1 is a rear elevation of my improved tamping machine; Fig. 2 is a side elevation of the same; Fig. 3 is a detail sectional view taken on the line 33 of Fig. 2, and Fig. 4 is a detail sectional view taken on the line 44 of Fig. 2.

Referring to the accompanying drawings, I have used the reference numeral 10 to indicate the frame, which may be supported upon suitable standards or suspended from overhead, as shown in dotted lines in Figs. 1 and 2. A pair of spaced angle bars 11, formed with notches 12 therein, are arranged at the base of the frame 10. Similar angle bars 13 are also arranged on the frame directly above the angle bars 11 in such position that their notches are in vertical alinement with the notches of said angle bars 11. Upright tamping bars let, beveled at their edges, pass through said notches. Rollers 15, mounted on each of said angle bars 11 and 13, are formed to receive said beveled edges and furnish an efficient bearing for said tamping bars. These rollers are each mounted in a cage 16 formed with slots 17 to receive the pins 18 in said angle bars. Set nuts 19, threaded in said bars, are arranged to adjust the positions of said cages whereby the roller Specification of Letters Patent.

Application filed January 13, 1913.

Patented Nov. 4, 1913.

Serial No. 741,893.

bearings may be moved to take up wear. Each tamping bar is provided at its base with a tamping head 20 adapted to pack material placed beneath it.

Mechanism for lifting the tamping bars 20 consists of a power shaft 21 revoluble on the frame 10. This shaft is fitted with a power pulley 22 and also with a cam arm 23 for each tamping bar. Lifting levers 24, each formed with a bearing 25, at one end, are mounted on the stub shafts 26 which are secured in the supports 27 at the rear of the frame, said levers being adapted to tilt vertically and horizontally on said stub shafts. The free end of each lever is pivotally attached to a connecting rod 28, which extends downward adjacent to the side of a tamping bar, and is then bent through the perforation 29 centrally arranged in the bar to the opposite side thereof, where it is pivotally attached to the pintle 30 having supports on said tamping bar. Rollers 31, formed with concave peripheries are mounted on each lever 24, said rollers being designed to be engaged by the faces of the cam arms 23, to lift said levers and raise the tamping bars and to be disengaged fro-m said arms to permit the fall of said tamping bars by gravity. Because of the connection between the tamping bars 14 and the rods 28, just described, lifting force applied to said rods is exerted at the centers of the bars and substantially in a vertical direction. It will be noted that the connecting rods 28 do not rest on center and as a result said connecting rods, together with their lifting levers 2 1, tend to tilt away from their respective tamping bars. Guides 32 are arranged on the frame 10 to limit this horizontal tilting movement of said levers and to direct the same, as the tamping bars are lowered to position in which the rollers 31 on said levers may be engaged by said cam arms.

Means are provided for securing the tamping bars in elevated, inoperative positions and for shifting the levers 2st to locate tilt to one side. A lug 35 and seat 36 are formed at the upper end of each dog. An operating bar 37, formed with elongated perforations 38 therein to receive said dogs, is slidable upon the frame 10. This bar is connected by the spring 39 to the frame 10, said spring being adapted to yieldingly act upon said slidable barto engage the lever 40, pivotally mounted thereon, with the frame 10. This lever, located as shown in Fig. 1, allows movement of the bar 37 by the retraction of the spring 39, as seen in said figure, to permit the dogs 33 to tilt and when moved downward at right angles to the position illustrated, shifts the bar against the action of said spring to move and hold the dogs 33 substantially upright.

In use, the cam arms 23 are rotated continupusly by any suitable source of power. hen the machine is not in operation, the levers 24 rest upon the seats 36 of their respective dogs 33 and against their guides 32, thus securing the tamping bars in elevated positions and freeing the rollers 31 from engagement with the cam arms 23. Nhen it is desired to commence the operation of the machine, the lever l0 is shifted to move the bar 37 and raise the upper ends of said dogs, whereby the levers 24 are carried to positions locating their rollers 31 in the paths of their respective cam arms. These rollers are engaged by said cam arms near their ends and the levers 24 are lifted a short distance from the seats 36 upon said dogs. hen said rollers 31 pass from the ends of the cam arms 23, the levers 2st instantly tilt and, as they fall with the tamping bars 1 1-, cleartheir seats 36 011 the dogs During the downward fall of the tamping bars 14, the levers 2d are directed by their guide bars 32 to again locate the rollers 31 in the paths of their cam arms. These rollers engage and follow the faces 23" to the ends of their cam arms where they are released, thus raising the bars and then permitting them to fall by gravity. This action is repeated until it is desired to stop the machine, when the lever 10 is shifted to the position illustrated in Fig. 1. Upon this operation, the dogs are released from their upright osition and are permitted to tilt against their respective levers. These levers are then lifted as before, above the seats 36 on the dogs 33, in which position the lugs 35 on said dogs engage said levers. As the rollers 31 reach the ends of their cam arms and are released therefrom, the levers fall into position upon the seats of their respective dogs. Said levers and dogs then tilt, with the levers 24: resting against the guides 32, thus holding the tamping bars 14 elevated and inoperative.

Having described my invention, what I claim as new and desire to protect by Letters Patent, is:

1. In a device of the class described, the

combination of a frame, vertically movable tamping bars, on the frame, adapted to fall by gravity, a lever for each bar pivotally attached at one end to said frame and adapted to tilt vertically and horizontally, a connecting rod between each tamping bar and lever, power driven arms adapted to engage said levers and raise said bars, dogs for engaging the levers to secure the bars in elevatcd inoperative positions, said dogs being 1 also adapted to carry and locate th levers in positions to be engaged by said arms whereby th levers are disengaged from the dogs to permit the fall of the tamping bars.

2. In a device of the class described, the combination of a frame, vertically movable tamping bars on the frame adapted to fall by gravity, said bars being formed with a perforation centrally arranged therein, adjustable roller bearings for'said bars, lifting levers pivotally attached to said frame and i adapted to tilt vertically and horizontally thereon, guides for said levers, a rod pivotally connecting each lever with its respective tamping bar and extending at its lower end through the perforation 1n said bar, said lever and rod being adapted to tilt, rollers on said levers, power driven cam arms adapted to engage said rollers and raise said bars, and dogs for engaging the levers to secure the tamping bars in elevated, inoperative positions, said bars being also adapted to carry and locate the levers in positions to be 1 engaged by said arms, whereby the levers are disengaged from the dogs to permit the fall of the tamping bars.

3. In a device of the class described, the

combination of a frame, vertically movable tamping bars, on the frame, adapted to fall by gravity, a lever for each bar pivotally attached at one end to said frame and adapted to tilt vertically and horizontally thereon,

its

a connecting rod between each bar and lever,

said rods and levers being adapted to normally tilt, guides for saidlevers, power driven cam arms adapted to move said levers and raise said bars, tilt-able dogs on the frame adapted to engage the levers and secure the bars in elevated, inoperative positions, an operating bar for shifting said dogs to carry and locate the levers in positions to be engaged by said arms, whereby the levers are disen aged from the dogs to permit the fall of the tamping bars.

4-. In a device of the class described, the

combination of a frame, vertically movable driven arms adapted to engage said rollers and raise said bars, and tiltable dogs on the frame formed with lugs and seats at their upper ends, said dogs being adapted to secure the levers and bars in elevated, inoperative positions, an operating bar for shifting said dogs to carry and locate the levers in positions to be engaged by said cam arms, whereby the levers are unseated from the 10 dogs and removed therefrom to permit said levers to clear said dogs as the tamping bars fall.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES E. NEILSEN.

lVitnesses F. C. CASWELL, F. M. HARDY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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