US155776A - Improvement in derricks - Google Patents

Description

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\ lN'o.1455,776. A v l Patented oc:.6,1s74.

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- UNITED *STATES APATENT OFFICE..

Lucius E. TRUESDELL, oir-WARREN, MASSACHUSETTS.

vIMFVROV'EMNTVIN IDERRICKS.V

Specification forming part of Letters Patent No. 155,776, dated October 6, 1874; application filed `July 22, 1874.

To all whom it may concern:

Be it known that I, Lucius E. TRUESDELL, of Warren, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Derricks; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilledin the. art to which it pertains to make and use the same, reference being had to the accompany-- ing drawings, and to the letters of reference marked thereon, which form a part of this specnication, in which- Figure 1 represents a rear elevation of a derrick' having my improvements applied thereto; and Fig. 2, a side elevation of the same; Fig. 3, a plan, and Fig. 4a cross-section, of the mast through line :c w of Fig.

1. Fig. 5 represents a plan of the lowest `ring of the mast with its attachments, as detached from mast and boom.

My invention relates to a new and improved mode of constructing a derrick, whereby the' bring the body to be lifted over the point or place at which it is-to be set or laid. Thirdly,

in combining therewith certain other devices by means of which, when the body raised has been set in place, thesliding block isreleased and allowed to descend to its normal position, readyfor a new lift. Fourthly, it consists in a novel construction of the mast, whereby it can, while combining the requisite strength, be made much lighter and more easy to handle than heretofore. y

To enable others skilled in the art to make, construct, and use my invention, I will now proceed to describe its parts in detail.

'lhe bed-plate or supporting-frame Amay be made in the usual manner. The mast B, however, instead of being made out of asolid spar, is made of Va number of strips, B', of wood 0r metal, clamped together in the manner of the staves of a` barrel by means of rings C, each stave or strip fitting into a notch formed in the periphery of a disk, a, Fig. 3, which is `arranged immediately opposite the rings C.

Of the rings C and disks a, two or more may be used for the purpose between the ends of the mast; three are shown in the drawings. Each end of the mast is also tted with aring, the lower one, b, being cast on or otherwise secured to a plate, c, on which is formed an upright iiange, c, to which :is secured the lower rail D of the Aframe E, on which are mounted the drums around which the ropes or chainsV are wound that operate the blc cks. The front side of plate c is also provided at its sides with two'lugs, d, which project in front of the mast; In theselugs are formed the bearings of the pin e, on which the lower end of the boom is hinged or pivoted. The ring C, immediately above this, is also provided with lugs to which the upper rail D ofthe frame E is rmly secured by bolts and nuts. To the under side of plate c iS secured a pivot,

`1],"on whichl the mast rests and turns, and which .fits into a step formed in the bed-plate A. The top of the mast, as before stated, is

'also provided with a ring, C, which I term a cap-ring, on the front of which is formed an ear, d', provided with an opening for the attachment of the hooked end of a link-rod or chain, F. Instead of one link-rod several may be used, Jdie lower end of the lower one of which is intended to be loosely connected to the vupper end of a loop, G, the two lower .ends of which are hooked into lugs c', formed on the upper side of the traveling sheaveblock H, which slides back and forth on guidetongues formed on the inner side of the two` parts or halves, j', which form the boom.

rlhese tongues take into grooves formed on either side of the traveling or race block H; The boom, as before stated, is composed of two halves, f, connected together at their lower ends by means of a 'stout-frame-piece, I, on each side of which is formed a socket for the reception of the two'pieces, f, which form the boom. This frame-pieceIis mounted near its lower end upon a pivotal pin, e, which passes through it and through the lugs el, formed on the front side of the plate c, which carries the ring b and pivotal pin g', on which.

tached or secured. 'The other end of ropev j is made to pass around a sheave-wheel, K, loosely mounted on the pivotal pin e, on which the lower end of the boom turns, and thence passes around a drum, J, which is mounted in suitable bearings made fast to theframe E before referred to. `The traveling vor race block H consists of a metallic frame in which is se cured the pivotal pin of two or more sheavewheels, a, around which the rope or chain lis made to pass. and thence around the sheave or sheaves n of the traveling-block K, in the usual manner of reevng blocks.

The other end of rope or chain lpasses over a sheave-wheel, m, which turns on la pin mounted in hangers secured to the upper capring C on the top of the mast, and thence around a drum, M, arranged to turn' in suitable bearings made fast to the frame E at a point` some distance above drum J. Intermediate between drums M and J is interposed a windlass, N, mounted in suitable bearings secured to the frame E, each end of which is fitted with crank-handles O. At either end of drum M, and firmly keyed to vits shaft, is secured a pinion, the one, o, at the one end being smaller than the other, p, at the other, for a purpose to be hereafter described. The windlass N is also provided with a pinion at each end, the one, q, of which is made larger than the other, r, both being loose on the shaft. The larger one, q, is arranged to gear with the smaller pinion o of the drum M, and the smaller one, 1^, with the larger one, p, of the same drum. The inner face of each of the pinions q and r is provided with one or more teeth, which are intended to engage or mesh 'with notches cut in the outer faces ,of two slide-clutches, s and t, the notches of clutch s being intended to engage with the teeth of pinion q, and those of t with the teeth of pinion r. Each of these clutches is provided with a spline, which slides in a groove longitudinally cut in the periphery of the shaft of the windlass N. Each of these clutches around their periphery is provided with a deep groove, into which fits the sides of a lever-the one, u, for clutchs, and the other, o, for clutch t. A weighted pawl, w, is arranged to mesh into the teeth of the pinion a', which is made fast to to the shaft of the drum J, so as to stop its motion whenever required. Pinion x is intended to mesh with the teeth of the pinion q of the windlass N. Drum J is so made as to slide back and forth on the pin or shaft on which it is mounted so as to throw 4it in and out of gear with the pinion q whenever required.I When throwninto gear with pinion qit is held in place by means of a pivoted stay-lever, 111 secured to the inner face of the right-hand standard of frame E. Abrakestrap, z, is made to pass around the stem of pinion r, its lower end being attached to a footbrake lever, z', for a lpurpose to be hereafter described. The other end of the brake-strap z is made fast to cross-piece l, which binds the standards of theframe E together at or near their middle. y,T o the upper edge of this same cross-piece l the levers u and 'u are piv'oted, which operate the clutches s and tof the windlass N.

Thus constructed, the operation is as follows: The race-block H is lowered until the traveling-block K hangs vertically above the weight or body to be moved, The latter is then lowered by allowing the drum M to turn -until itshook can be fastened into the loops,

which pass around the body to be raised.

:The lowering of block K is eected in the following manner: Drum J is made to slide along its shaft until its pinion x is fairly out of gear with the pinion q of the windlass N. Slide-clutches s and t are then moved out of gear with their respective pinionsq and r, and so held by their shippinglevers u and fu. This, then, leaves drum M free to turn, so as to furnish the necessary amount of slack to allow block K to descend. As drum M turns, its

piuionso and p also revolve, turning pinions q and of of Windlass N; but they, being out of gear with their respective clutches, and with the pinion w of drum J, simplyturn loosely on the shaft of the windlass. The block thus hooked to the body to be raised, if the latter lies in a vertical plane with the place at which it is to be deposited, then drum J is allowed to, remain with the pinion x disconnected with the pinion q of the windlass, when, if the weight is great, the clutch tis thrown into gear with the teeth of pinion r of the windlass, and there held by its shipping-lever e.

The apparatus is then ready to raise the body to the height required to place itin proper position by simply turning windla'ss N, and is then lowered, as in the case of the ordinary i derrick.

into gear with pinion q, and then raised, as

as before. ever, not lie in the same vertical plane with the spot 'at which it is desired to place it, then l drum J is made to slide along its shaft until the teeth of its pinion w mesh with the teeth of the pinion q of the windlass. This done, its

stay-lever y is then raised behind its end, so

as to keep it in place.

At this stage, the question is then to be considered whether it has to travel farther in'a horizontal or in a vertical plane in order to reach the point at which it is to be placed. If

If, however, the body to be raised is not A very heavy, instead of throwing the clutch t of pinion fr into gear, the clutch sis thrown!l it has to be raised much higher than it has to be moved horizontally, then clutch sis thrown into gear with pinion q, otherwise clutch t with pinion 1^. This done, the4 hands man the windlass, when drum M will raise blockK and the weight, through, `its ropeV or chain Z, and drum J simultaneously therewith, through its rope or chain j, drag outward race-blockH,

carrying therewith block K and the weight in a horizontal direction. This operation will continue until the block iseither high enough to deposit the body or far enough outward to" gradually lowered to its place in the usual manner. If the weight is, great, the brakestrap z, through its treadle z', is brought to bear on the face of pinion'c, in order to arrest its too sudden descent, and thus aid the hands at the windlass; but if it is carried out faster, so as to reach the vertical plane in the line of which it is to be deposited, then drum J, with its pinion x, is thrown out of gear with pinion q, and pawl w made to engage with one of the teeth of pinion x, so as to hold drum J in that position, while traveling-block K is still farther raised through the action of the windlass N and one of its pinions on the corresponding pinion of drum M. It now being sufficiently high, and in a vertical plane with the spot at whichit is to be deposited, the boom is then turnedin and the body lowered as before. A derrick thus made and operated possesses great advantages over the ordinary derrick, aswillbe apparent to any one at all conversantwith their operation; and can be managed by much fewer hands than is absolutely required by the latter for raising and placing large and heavy bodies, andin less than half` the time; `and it is also to be ob V served that, while the primary action of drum J on race-block H is to draw the latter outward, in a horizontal direction, it, at the same time, through the action of the link-rod F, as attached to the block H, also serves to assist in. raisingthe weight, inasmuch as link-rod F, it being pivoted to the top ofthe mast, and to the race-block, acts as aradial arm, and, consequently, as block H moves outward, correspondingly raises the boom, and with it the Weight. The body once`deposited, and block K detached therefrom, the blocks H and K will, by virtue of their own gravity, then descend by simply detaching `the pawl 'w from the teeth of pinion F, for which purpose its weighted end may be raised and held in that position by means of a` pivotal supportingarm, 2, attached to the front of the left-hand standard of theframe E, pinion w, for this purpose, being also disengaged from the pinion q of the windlass. Instead of connecting the chain or link rod Fdirectly to the race- `block H, it may, if desired, be entirely detached therefrom, and directly attached, by means of eye-bolts secured to the outer end of the boom, as shown indotted lines in Fig. 2. By this plan, (and it may be so made as to be interchangeable-that is to say, the linkrod or chain maybe so made as to be hooked at its lower end either tothe race-block or to the eye-bolts on .the end of the boom,).the

race-block may be moved outward to the end of the boom in an inclined plane, and not in a curved line, as it otherwise would be if at- 'tached directly to the race-block. Moreover,

link-rods of different lengths, -or chains withV removable'hooks, may be used, so as to vary theV inclination of the boom, as required, according as the work progresses.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is Y 1. The combination of the boom of a derrick, made in two parts, f f, each of which is p provided with a tongue or groove, with a racey block, H, correspondingly constructed, so a's to slide or move therein, in the manner sub- 4 stantially as and for the purposes set forth.

2. The combination of arace-block, H, rope or chain j, sheave-wheelsi and lc, and drum J, substantially as and for thepurpose set forth. 3. The combination of, traveling-block K, chain or rope l, and drum M, with race-block H, chain or rope j, druln J, and windlass N, substantially as set forth. y ,Y

4. The combination of the sleeve-clutches s and t, pinionsq and o", and windlass N, with` pinions 0 and p, of drum M and sliding drum I J, as and for the purpose set forth.

5. The mast of'a derrick, when made-of a number of strips or slats B', clamped together by means of rings C and disks a, in the manner and for the purposes set forth.

In testimony that Iclaim the foregoing as Vmy own I affix my'si gnature in presence of two witnesses.

LUGIUS E. TRUESDELL. Witnesses:

l). G. STUART,

BHANNAY.

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