US519955A

US519955A - Steam-shovel

Info

Publication number: US519955A
Authority: US
Publication date: 1894-05-15
Anticipated expiration: 1911-05-15

Description

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G. HOLMES. STEAM SHOVEL. Y

Patented May 15, 1894.

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G. HOLMES.

Y STEAM SHOVEL. No.519,955. Patented May 15,1894.

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UNITED STATES PATENT OFFICE.

GRANT HOLMES, OF DANVILLE, ILLINOIS.

STEAM-SHOVEL.

SPECIFICATION forming part of Letters Patent No. 519,955, dated May 15, 1894.

Application filed January 29, 1894- Serial llo. 4981421- (NO mOdBL) To all whom it may concern.-

Be it known that I, GRANT HOLMES, of Dany ville, in the county of Vermilion and State of Illinois, have invented certain-new and useful Improvements in Steam-Shovels, of which the following is a specification.

This invention relates to steam shovels, dredgers and the like; it is embodied partly in the dipper construction, partly in the jack brace construction, and partly in the construction and arrangement of the mast head and pulleys therein.

It is the object of the dipper improvement to strengthen the nose piece and provide means for readily attaching and detaching the same.

It is the object of the jack brace improvement to provide strong and effective lateral braces which may be adjusted, and raised for transportation, either by power or by hand. And it is the object of the mast head improvement to lessen the number of pulleys, ordinarily used to guide the hoisting chain, without interfering with the freedom of the Swing of the crane.

In the drawings forming part of this speciication Figure 1 is a side elevation of a steam shovel embodying the different features of my invention. Fig. 2 is a central vertical section lengthwise through the mast head. Fig. 3 is a front elevation of the mast head. Fig. 4 is a diagram illustrating the swing of the principal pulley of the mast head. Fig. 5 is a central vertical section from front to back through the dipper. Fig. 6 is a perspective representation of the jack braces. Fig. 7 is a detached representation of the jack screw, with its sheave, its clutch and its capstan head. Fig. 8 is a horizontal View of 4o Fig. 2.

- The car frame 1 is of any suitable construction, and suitably braced. The brace 2 is secured to the top of the car frame and the top of the jack frame. front end of the car frame, and it carries on its projecting end the mast head 3. The front end of the mast head is rounded, with relation to the vertical, and it is provided with an arc-formed mouth, or slot 4, through which the hoistingchain 13 travels and swings. A sheave block 5 is pivoted at its lower end on pin 9, which has horizontal bearings in It extends beyond the` the lower, front end of the masthead, and eX- tends in line with the length of the head. The sheave 11 is carried by the swinging block 5, and it is in substantial alignment with the vertical pivot of the crane. Vertical pin 10 is secured in the front end of the mast head and it projects upward beyond the same. Block 6 pivots on the upper end of pin lO, being held thereon by collar 7, and it provides a point of connection for the connecting bars 8 of the crane suspending brace 14. Pulley 12 is mounted in the rear end of the mast head between bearings sufficiently far apart to permit sliding motion in the pulley, and the chain 13 runs over pulley 12 and under pulley 11. As the crane swings from side to side, or from center to side, in act of loading and unloading the dipper the pulley 11 swings freely on the horizontal pivot, as indicated in Fig. 4, the chain follows the curved slot, and the pulley 12 moves from side to side, sliding in its bearings, in order to fully accommodate the motion of the chain in the swinging pulley.

The boom of the crane is shown at 15 and the dipper handle at 16. The dipper is constructed in the customary, or any desirable manner, except for the peculiarities hereinafter specified, and it' is connected with the handle as shown or in the usual manner. The body ofv the dipper is shown at 17, a band encompassing the upper edge of the dipper is shown at 18, the nose piece at 19, and the teeth at 20. The teeth have the customary external ribs, as 21, 22, which engage the outer surfaces of the nose piece and the dipper body, and are otherwise constructed in the customary manner. A plate, as 23, is bent to it the inner front portion of the dipper,"it is riveted iirmly to the upper edge of the body of the dipper, and it is recessed to receive the inner end of the nose piece. A bolt, 24, eX- tends through a hole .formed partly in the nose piece and partly in the contiguous vertical wall of plate 23, and, with the assistance of the tooth bolts, holds the nose piece in operative position. The band 18 greatly strengthens the dipper, at the point where greatest strength is needed, and the plate 23, constructed as specified, enables the nose piece to IOO be readily detached for the purpose of sharpbars 25 which rise from the floor at one side of the front end of the car, extend upward to the top of the car frame, run across the top of the car and extend down to the iioor on the opposite side; thereby providing a strong support for the jack braces, and for the mast head. .Jack screws 26 have bearings in the car frame between the parallel bars 25, and such screws have loose pulleys 31 at points slightly above the oor of the car, and sliding clutches 32 abovethe loose pulleys, such clutches being splined on the screws and provided with operating levers as 39, in Fig. 7; and in addition to said pulleys and clutches Ythe lower ends of the screws are provided with capstan heads, as seen at 37 in Fig. 7, whereby the bar 38 may be used by hand to rotate the screw. Nuts 27 are mounted on the jack screws and guided between the parallel bars. A brace bar 28 is hinged in each nut, a tie brace 31 is hinged to a bolster under the car frame, the brace bar and the tie brace are hinged together at their swinging ends,

through the intervention of a casting 29, and

such casting has a ball at its lower end which its in a socket in the bearing block 30. The bearing blocks are adjusted, or raised for transportation, by. turning the screws in the nuts, and this is done, except in an emergency, by applying power from the engine to the pulleys and throwing the clutches, either or both, in engagement with the pulleys. The power may be applied in various ways, as for instance, the chain 35, which is the chain that operates the dipper, may be geared to run in opposite directions under the manipulation of the operator, and may be diverted through the double pulleys 33 and 34 to the pulleys of the jack screws.

The capstan heads on the jack screws bear upwardv against the bottom of the car and all vertical strain'of the braces is thrown onto the heads of the jack screws, to the relief of the parallel guide bars and other parts of the frame.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. Acrane mast head havinga single sheave block approximately in line with the vertical pivot of the crane and swung at its lower end on an approximately horizontal pivot, substantially as set forth.

2Q A crane mast head having an arc formed mouth, or slot, for the passage of the chain and provided with a single sheave block approximately in line with the vertical pivot of the crane and swung at its lower end on an approximately horizontal pivot substantially as set forth.

3. A crane mast head rounded vertically on its forward end and having an arc-formed mouth, or slot, for the passage of the chain, and a single sheave block in the mast head approximately in line with the vertical pivot of the crane and swung at its lower end on an approximately horizontal pivot, substantially as set forth.v

4. A crane masthead having asingle sheave block approximately in line with the vertical pivot of the crane and swung at its lower end on an approximately horizontal pivot, and also having a sliding sheave to the rear of the swinging sheave block substantially as sct forth.

5. A crane mast head having a sheave block approximately in line with the vertical pivot of the crane and swung at its lower end on an approximately horizontal pivot, and a verl tical pin projecting upward from the mast head and forming a bearing for the suspension rod of the crane boom, substantially as set forth.

6. A jack or brace for steam shovels, and similar machines, such brace comprising a jack screw having bearings in the car frame, a nut on the jack screw guided against turning, a brace bar hinged to the nut, and a tie brace hinged to the lower portion of a side of the car, the brace bar and the tie brace being hinged togther at their swinging ends and con nected with a'bearing block, substantially as set forth.

7. A jack or brace for steam shovels, and similar machines, consisting in the combination of a jack screw having bearings in the car frame, a nut on the jack screw guided against turning, a brace bar hinged to the nut, a tie brace hinged to the lower portion of a side of the car and also hinged to the brace bar, a bearing block connected with the brace bar and tie brace at or near the conjunction thereof, and aloose sheave and sliding clutch on the jack screw enabling such screw to be turned by a chain of the machine,

` substantially as set forth.

8. A jack screw for adjusting the brace bars of steam shovels, ,and like machines, such screw having bearings in the car frame and provided with a clutch sheave and a capstan head, whereby it may be operated either by power or by hand, substantially as set forth.

9. In jacks or braces for steam shovels, and similar machines, the combination of a guide frame composed of parallel bars extended from the floor at one side of the car upward, across and down to the iioor on the opposite side, a jack screw between the vertical bars on each side,a nut on each jack screw guided between the parallel bars, a brace bar hinged to each nut, and a tie brace hinged tothe lower edge of each side of the car, the brace bars and the tie braces being hinged together at their swinging ends and connected with a bearing block, substantially as set forth.

10. In a dipper for steam shovels, the combination of a dipper; a nose piece; a plate recessed to receive the nose piece, extended around the inner, upper, front portion of the dipper and secured tlrmlyin place; and a bolt extending Vthrough a hole formed partly in the nose piece and partly in a coinciding ver-1 TOO IIO

tical wall of the plate; whereby the nose piece is secured to the dipper in a readily detachable manner, substantially as set forth.

1l. In a dipper for steam shovels, the combination of a dipper; a nose piece; aband extending around the upper edge of the dippcr; a plate secured rmly to the inner, upper, front portion of the clipper, and recessed to receive the nose piece; and a bolt extending through a hole formed partly in the nose piece and partly in a coinciding wall of the plate, substantially as set forth.

I2. A jack or brace for steam shovels, and like machines, consisting in the combination of a jack screw extended through the bottom of the car frame and provided with a head on its lower end bearing against the bottom of the car, a nut on the jack screw above the Hoor of the car,such nut being guided against turning, and a brace extending obliquely downward and outward from the nut, whereby all vertical strain of the brace is exerted on the head of the jack screw and against the bottom of the car, substantially as set forth.

In testimony whereof I sign my name in the 2 5 presence of two subscribing witnesses.

GRANT HOLMES. Attest:

E. S. MCDONALD, SAMUEL TROTTER.