USRE11164E - Jydraulic crane - Google Patents

Description

5 Sheets Sheet 1.

Reissued May 6 1891.

J. KENNEDY & 11. AIKEN.

HYDRAULIC CRANE.

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HYDRAULIC CRANE.

No. 11,164. I Reissued May 5, 1891.

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Reisslied May 5, 1891.

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HYDRAULIC CRANE.

,Rexssued May 5, 1891.

mmmrr UNITED STATES PATENT .OFFIcE,

HYDRAULIC CRANE.

SPECIFICATION forming part of Reissued. Letters Patent No. 11,164, dated May 5,1891. Original No. 412,851, dated October 15, 1889. Application for reissue filed Au ust 16.18901SerialNmSBZflSd.

To all rah/1721, it may concern;

Be it known that we, JULIAN K NNEDY, of Latrobe, in the county of \Vestmoreland and State of Pennsylvania, and HENRY AIKEN, of Pittsburg, in thc county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in IIyd raulic Cranes; end we do'zliereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying five sheets of drawings, in which' Figure 1, Sheet 1, is'a plan View of the cranes, heating-furnaccs, and the tabies of the plate or other rolling mill used in connection with the furnaces. Fig. 2, Sheet 2, is an elevation of our improved crane, illustrating its operation in connection with one of the he tingfurnaoes, which is shown in section. Fig. 3, Sheet 3, is a side elevation of the carriage and rackingcylinder and connections. Fig. 4, Sheet 4, is a plan view of the racking-cylinder. Figs. 5,6,7, and 8, Sheet i, are sectional views of the i'ackingcylinder on the lineA A,

I? B, C C, and D Din Fig. 4. Fig. 9, Sheet 5, is'a front elevation of the jib and carriage. Fig. 10,Sheet 5, is a cross-section of the supporting-casting of the jib on the line E E, Fig. 2. A v

In describing our inventionwe will begin with'thc construction of the crane, an elevation of which is shown in Fig. 2, Sheet 2. It has a hollow iron must 2, the lower end of which rests and turns in a base-plate 3 and the upper end of which is steadied and turns in a steadiment 4. It has also a jib 5, composed or channel or other suitable bars of iron or steel, the outer end of which is supported from the top of the mast by an eye-bar or Suspended on the jib is a can.

eye-bars C.

riage 7, which carries the gripping devices,

the operators seat, and the valves and valve:

levers which control the movements of'the crane. 'lhe carriage is moved by a cylinder -8,ca1 1ed the racking-cylindcr, mounted on the jib. The water-supply and waste pipes extend down through the mastund out. along the jib, and thence to the valve-chamber. Circulatingepipes also lead from one of the valves on the carriage to a cylinder 9, placed.

at or near the base of the crane, to'opcratc the piston which turns the crane.

The ccu'riage.-'lhe carriage 7,1 igf3, Sheet 3, which is mounted on the jib, is composed of two rectangular iron frames 10, which'are suspended from the opposite sides of the racking-cylinder S and are fastened together by the various parts and structures whiclrare placed between and supported by them. Extending longitudinally near the bottom of the carriage is the lifting-bnr'll, Figs. 2 and 3,.

which is'composed of two pieces 12 and 13,

secured together by clamping-sleeves 1-1 -and 15, fastened by wedges or keys 16 and 17. The piece 13 extends beyond the, end of the carriage 7 and at its outer end has a downs ward extension 19, having an iuwardlyproand the accompanying enlarged debarn is pivoted to the carriage at 25, and a vertical movement or oscillation on its pivot 25 is given to the bar to enable it to pick up" .and lay down an ingot or other burden by means of avertical-cylinder 26 mounted between the vertical side frames 10 at the outer end of the carridge',' Fi'gs; 3 and 9, the piston-- rod 27. of whichis connected by a yoke 28 with the bar 11, said yokercciprotmting vertically between the sideframes 10 of thcca'rria-ge, and thereby raising or lowering .the outcror grippingend of thebarll. The bar 11' is made in two parts 12. and 13,;because the outer end enters the furnace and is liable tobecomc warped and distorted thereby, .or to be bent by the weight of the burden. In

such cssc the whole bar does not have to be replaced, but only the outer [or injured'part- 13, which is easily done by' loosening the keys in and 17'. Ilhe operators-seat 29 is placed,

vided, so that he need not stand nor stepon;

on the cylinder 93, and platformsBO are pro-t V .roo

the cylinder. 31 erethe valves whichfcon.-' trol the several cylinders above mentioned.-

, mon waste-pipe for all the valves. 45 and 46 64 (shown in broken lines in Fig. 6) "through the cylinder-casting from the wateryet preventi -clearly shown. water-ways 60- 61 with the pipes 45 46 leading are pipes leading from the valves to the ends of the cylinders 8, 9, 23, and 26. 47 represents'one of the valve-levers by which the water may be caused to enter either end of anyof said cylinders.

The rack lQ'CUZIDI IEI'JfJXt a proper pointon the jib. 5 is a rigid casting 68, Figs. 2 and -10, which supports the stationary piston-rod 48 of the racking-cylinderS, the main supply and waste pipes, and the circulating-pipes which "lead to the cylinder 9. The rackingcylinder 8, carrying the carriage 7, reciprocatcs on the stationary piston-rod 48, which is secured in the middle opening of the casting 68. The main supply and waste pipes49 and 50 lead from the mast .3 to the left- hand chambers 52 and 51 of the casting. Fastened in the other end of these chambers are pipes 53 and 54, which extend to the cadet the jib beyond the end of the racking-cylinder 8, and are there supported by a suitable plat-e55, Figs. 3 and 9. Similar pipes extend fi om the right- hand chambers 56 and 57 of the casting, but these pipes are designed, as will be hereinafter described, to convey the water to and from the cylinder 0. The racking-cylinder B (see Figs. 4, 5, 6, T, and 8) is east with side wings, in which are four waterways 58, 50, 60, and 61, two in each wing. The pipes 53 and 54 from the chambers 51 52 extend through the ways 58 59, and the pipes from the chambers 56 57 extend through the ways 61,,an'd the ends of the ways are closed around. the pipes by glands orstuffingboxes 62, Figs. 3, 5, and S, which permit the cylinder to 'slide freely over the pipesand the escape of the water. The s ipes 53 54 and their companion pipes on the other side of the cylinder are perforated, as at 63, Fig. 8, to permit the passage of .water at a point which when the cylinder 8 is at its .outermost position shall still be within the water-ways. Communication is had between the chambers 58 and 59 and the valve-chamber of the valves 31 by meansof the ports 64 and 65, Figs. 3 and 6, with which the supply and waste pipes 43 and 44 connect. The port extends way. 59 to the pipe 423, which leads thence to 'th'evalve 3-1, and the port 65 (shown 'in full lines in Fig. 6) extends through the cylindercasting from the water-way 58 to the pipe 44, which extends thereto from the waste-passage of the valve 31. In Fig. 6 the like ports on the oppositeside of the cylinder are These ports 66 67 connect the to the valve which controls the operation of the cylindcrt). The cylinders 8, 9, and 23 have each valve-connection pipes 45 46, while the cylinder'26 has.but"one pipe 46. This cylinder is vertical, and its piston maintains 4-1 is a com the weight of the bar, 11. The pipe -l6, when the valve is depressed, admits the water under the piston and raises it; but. when the valve is raised and communication is opened between the pipe 46 and the waste-passageof the valve, the weight of the piston and the bar 11 forces'the water back through the pipe 46 into the waste-passage and the. piston descends. The pipes 45 46 of the racking-cylinder 8 are connected to its opposite ends, as shown in Figs. 3 and 5 and in Fig. 4. The valves are operated by bell-cranks or levers 47, mounted on a cross-shaft 69 between the side frames 10 in front of the operators seat 29, saidlevers being connected with the valvestems 32 by links 70. (See Fig. 3.) The supply and'waste pipes of the several cylinders are shown in Figs. 2 and 3, and are described in the specification of our said reissue application.

The rotating cylindercon'nec ti0ns.-'Ihe cylinder 9, by means of which the crane is rotated, is placed on the ground in properposition with relation to the foot of the mast, Fig. 2. its piston is connected by a rod 105 with a reciprocating rack 106, which engages a gear-wheel 107, mounted on the ,foot of the mast, Fig. 2. In Fig. 1 we illustrate the ar-; raugemcut of two of our improved cranes as we have them in practical operation. The two cranes are. arranged back to back in the center of a circle formed-by six heating-furnaces 130, three of said furnaces being served by each of the cranes. The feed-table 131 of a plate or other rolling millextends within the range of the jibs of the, cranes, so that the latter canenter any one of its particular furnaces, seize an ingot therein, retract it-from the furnace, and swing it around and deposit it upon the feed-table of the rolling-mill. The ingots arebrought to the furnaces by a tramway or track 132,'one bra'nchof which lies in'front of each group of furnaces. A suitable car 133, for conveying the cold ingots to the heating-furnaces, runs on this track, and the furnaces are charged by means of the cranes,- the lifting mechanism seizing an ingot in the manner hereinbet'orc described.

as it lies on the car, lifting it, inserting it into the furnac e,';and. after placing it properly therein releasing it and withdrawing from the furnace.

' The entire operation of charging and discharging the furnaces and serving the rollingmill is accomplished by the. cranes withoutthe intervention of any manual labor whatever, cxcept that of the operator, who sits on the,craneand manipulates the valves. From the time an -in.got is placed onthe car and the car is'run to the furnaces it is nottouched or moved by manual labor until after it is placed upon the mill-table.

By reasonof the capabilities of our improved crane and their utilization, as shown in Fig. l, a great saving.

of time and labor is effected andfthe whole operation is carried on much more rapidly 'and with far greater prccison than heretofore.

""lius constructed the operation of our impi ovcd crane is evident. The operator seated on the carriage is able to turn the crane in either direction by moving the lever ot the valve which controls the circulation of water to the cylinder to advance or. retract the carriage and the lifting mechanism by moving the lever of the valve which controls the racking-cylinder S to raise or lower the lifting mechanism by movingthe lover of the valve which controls the cylinder 26 and. to actuate the gripping mechanism by moving the lever of the valve which controls the cylinder 23. All of the operatingvalves being placed on the carriage, which is mounted on and travels with the jib, the operator moves with the jib and occupiesa fixed position relatively to the work, such that he is always near it and has it under close inspection. This enables him. to operate the crane with greater precision and rapidity and with less danger to the furnace and other objects with which it is used than can be done with any crane where the levers and operators seat are on the mast. or in some other place less favorable for inspection ofand at a greater distance from the work. \Vith such cranes there is constant liability of objects coming between the operator and the work, and as he is usually dependent upon signals for direction he is constantly liable to swing the burden against the side or root of the furnace or other object and thereby injure it.

With our improved crane ingots and other objects can be introduced into or taken from furnaces and similar places horizontally with great aceu racy and safety, the furnace can be very closely filled and the ingots moved there in by the operator alone and without the necessity'of any signaling or additional labor except for opening and closing the doors of the furnace. The operator moves with and is always near the work, and by means of the several levers can operate the ponderous machine with immense loads with the ease and precision of a hand-tool.

While we have described and illustrated our invention for use with a gripping device for gripping'and raising ingots, we do not wish to limit ourselves thereto, because the bar 11 may be provided with a forked or spade end,,upon which the burden maybe placed and by which it may be deposited in the furnace upon suitable rests, which will permit the fork or spade to be withdrawn from or inscrlcd under the burden.- In such case the cylinder 26 and the parts operated by it would be dispensed with.

The use-of a movable"racking-cylinder is an important feature, because it enables the carriage to travel back and forth-with the work and thereby dispenses with the necessity of projecting the lifting-bar therefrom, and hence gives the bar a stronger and better support, renders it more manageable, and preserves the some distance between the end of v the bar and the operator seat.

It is necessary in order that the operator may have a fixed position to and close Inspecmechanism, and. the valves which control the movements of the rackingcylinderandlifting with the jib and that the carriage upon which the valves and lifting mechanism are carried should be moved by the racking-cylinder.

sity-of an additional operator, and increases the rapidity andaccuracy of themovements the carriage the valve which controls the operation of the rotating cylinder 9; but thisis not necessary to give the operator a fixed position with relation to the lifting devices, and therefore we do not desire to limit our claim fected by including therewith'the placing of the valve of cylinder 9 on the carriage.

binations we do not wish it to be understood that we confine ourselves to a movable 'raoking-cylinder, because, although we prefer that cylinder mounted on the jib an a movable piston for actuating the carriage s an obvious equivalent and such a one as a. person skilled in the art could substitute therefor. The same is also true of the connections between the circulatingpipes on the jib and the valves on the carriage. i

It is a more matter of calculation and or with our construction before him to substitute therefor others that will work, and therefore we do not by claims specifically setting forth our particular combinations wish to limit ourselves to their use in connection with matters covered by other claims.

It is apparent that the pivoted lifting-bar can be made to move sidewise instead of vertically to reach over the end of the ignot or other burden.

*hile we refer to our invention as an improvement in hydraulic cranes, we do not limit on rsclves to the use of water, but include also steam, air, gas, oil, or other fluid as the equivalents thereof.

What weclaim as ourinvention, and desire to secure by Letters Patent, is-- l. The combination of thecarriage, the pivoted lifting-bar having an end projection, with a sliding gripper, and a cylinder with suitable water connections and valve to operate such sliding gripper, substantially as and for the purposes described.

2. The combination, with a crane and the jib, of a horizontal lifting-barupheld by the power devices for lifting said bar, and power devices for movim the bar horizontally along the jib, substantin ly "sand for the purposes described.

3. The combination, in a crane, of the pivoied liftingbar havinga lateral projection or tion of the work thathis seat, the lifting mechanism should be connected to and travel It is a great convenience, saves the necesof thccraue to add .to the valves placed on- In the claims relating broadly to these co'ni-- construction, the use of a static! yracking for the means by which the latter end is efrangemont on the part of the skilled person jib and having a gripper at the end thereof,

extension at the outer end with a reciprocating slide, which projection and slide constitutq the gripping mechanism of the crane and act in conjunction to seize and hold the burden between them, substantially as and for the purposes described. I

- 4. The movable carriage having mounted thereon 'and in combination therewith the pivoted lifting-bar and a hydraulic cylinder for giving it a short vertical oscillation, a sliding gripper capable of acting in conjunction with the lifting-bar to grip the load, a hydran lie cylinder for actuating the sliding gripper, and valves having suitable water connections with the source of water-s11 pply and the said cylinders for the purpose of governing the operation of the cylinders, substantially as and for the purposes described.

5. In apparatus for charging furnaces, the

20 combination of aniovable jib, metal grippers carried thereby and adapted to be inserted horizontally into a furnace-door, and a powermotor connected with the grippersandadapted to operate them, substantially as and for the purposes described.

6. The combination of a laterally-movable jib, metal grippers carried thereby, a powerirnotor which acts on ,the grippers to project tltm longitudinally, and a power-motor connected with the grippers to cause their appreach or separation, substantially as and for the purposes described. 1

In testimony whereof we have hereunto set our hands this lfit-lrday of June, AMD. 1890.

JULIAN KENNEDY. HENRY AIKEN.

Witnesses: V W. B. CORWIN, H. M. CoRWIN.

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