US1305631A - travell - Google Patents

Description

'vv. TRAVELL.

BOOM.

APPLICATION FILED JAN. :5, 19

Patented J 11110 3, 1919.

4 SHEETSSHEET X.

WA TRAVELL.

BOOM.

APPLICATION FILED JAN-15,1919.

Patented June 3, 1919.

4 SHEETS-SHEET 2- ffiaiwe J W. TRAVELL.

BOOM.

APPLICATION HLED ]AN.15. I919. 1 35 1 PatenfedJune 3,1919.

4 SHEETS SHEET 3 Inveniwr Z'raveZZ W.-TRAVELL.

BOOM.

APPLICATION FILED JAN. 15. 1919.

1 ,35,1 Patented June 3, 1919.

4 SHEETS-SHEET 4.

WARR.EN TRAVELL, or new roan, n. Y.

more;

aaoaest.

Toallwkbmitmay concern Be it known that I, WARREN TRAVELL, a citizen of the United States, residin at New-York city, in the county of New Tork and State of-New York, have invented certainnew. and useful fmprovements in' Booms, of which the following is a specification.

This invention relates to improvements in booms. More particularly it relates to hoisting and transporting apparatus, and to devices by which the boom of a hoisting tower, adapted to extend out therefrom, as for example, over a ship alongside, can be withdrawn to clear the slip for the movements of the ship. Hitherto it has been customary to hinge such a boom so that it can swing up, or swing sidewise; but a swinging boom is liable to interfere with the masts, rigging, or radio installation of the ship, or to be hampered by the upper Works, and has other limitations, one of which is that it cannot be used except when fully projecting. It is an object of the present invention to'provide a. boom whose extension or retraction will not interfere with any part of the vessel; and on which the hoist can be operated at any degree of eX- tensiOn of the boom. It is another object of the invention to provide for supporting the free end of'the boom at all degrees of extension thereof, and to provide for the automatic. shifting of this support, so that the boom is properly supported whatever its degree of extension. Further objects of the invention are to provide for the hoisting carriage to operate on any part of the boom or on the permanent Way; to provide so that the length of rope operating the hoist and traverse is automatically adjusted to the position of the boom, and to provide the other advantages that characterize the construction hereinafter shown.

The objects of the invention are accom* plished by making a boom which is projectable and retractable in the direction of its own length; arranging for the carriage to shift between the permanent way and the extensible boom at any'position of the boom, as if they constituted a continuous track, by

the device of providing a track and set of carriage wheels for the permanent way and another track and set of wheels on the same carriage for the boom, each track being so Set as to carry free in air wheels that run Specification of Letters Patent.

Patented June a, rare.

In the case of a boom whose inner end is not supported on a permanent way the same device may be applied to the' inner end. 1

This speed controlling means may consist of a drum fixed on the same shaft with the rope which hauls the boom horizontally, having its rope grippingperiphery formed with s a surface of difi'erentlal and varying radius, so designed as to enlarge or retract the bight in a. rope whose two ends are wound upon it and which holds a floating sheave whose movement draws in or pays out the suspender rope so as to produce the desired horizontality. The differential principle may also be-applied simultaneously to two ropes, one for each end of the boom. As the invention may be applied in various forms, the patent is not to be deemed limited to the specific constructions which are here set forth. It is intended that the patent shall cover by suitable expression in the appended claims whatever features of patentable novelty exist in the invention disclosed.

In the accompanying drawings, which are more orless diagrammatic:

F ignre 1 illustrates the invention as it may be applied to a stationary tower, showing the boom extended, in side elevation;

Fig. 2 is the same, showing the boom retracted;

Fig. 3 is an end elevation, in section through the permanent way and the boom on the line 33 of Fig. 1;

Fig. 4 is a plan indicating a motor driven drum for hauling in either direction on the combined hoisting-and traversing rope;

Fig. 5 is a plan indicating motor driven drums for hauling in and out the boom and also for simultaneously and differentially moving a rope which suspends the extensible part of the boom;

Fig. 6 is a side elevation of another embodiment of the invention;

Fig. 7 is an end elevation showing a cross section of a detail at Z7 of Fig. 6;

. til-0 manent way,

Fig. 8 is a diagram showing a modified arrangement of drums for differential movement of the ropes; and A Figs. 9 and 10 illustrate modifications.

In Figs. I, 2 and 3 of the drawings, 10 indicates a permanent way and' 11 an extensible way, herein called the boom, for a carriage or trolley from which is suspended the load that is to be hoisted and transported, The boom is movable between the extended position illustrated in Fig. 1, and the retracted position shown in Fig. 2, and can be set, made fast and used in any position between these limits. Its inner end rests on a pair of flanged wheels 13, seen in Fig. 3, which run on a part of the permanent way 10, and whose axle sustains the boom by any suitable attachment. The persupported at its outer end on a tower 14, extends thence over as many intermediate supports 15 as may be desired to a tower 16 which sup orts its inner end. Ordinarily this we and the boom will extend horizontally ut if occasion requires they may be inclined. The outer end of the boom is suspended by a stay, comprising a rope, or, as illustrated, a pair of ropes 12 which reach it, over sheaves 17 at the top ofthe outer tower 14 and over sheaves 18, from the floating sheaves 42 each of whose position is controlled by apparatus hereinafter described for letting it up or drawing it down. As shown in Fig. 3, there are two ropes 12, spread apart as much as possible by setting the sheaves 17 at the corners of the tower, so that they serve to prevent side sway of the'boom; but in Figs. 1 and 2 these two ropes appear as one and the appearance is the same as it would b if there were only one rope 12, and a single sheave 17 were in the middle, beside the one 37 there shown. Under either construction, the action is the same, mtv'ement of sheave 42 either paying out or drawing in rope 12, simultaneously with the hauling of the boom by rope 21 or by rope 20. The carriage 22 can run either on the permanent way or on the boom, passing freely from one to the other. in the particular construction and arrangement of permanent way and boom illustrated in Fig. 3, the boom consists of an I-beam and the permanent way consists of two broad channel beams, one set on each side of the I-beam, with their nnels facing the channels of the I-beam. The web of each beam is in the vertical plane; and the flanges point toward each other in four pairs and on two levels, separated enough for suitable clearance. This construction provides by very simple means a firm attachment for hanging theboom, and three pairs of rails, of which one pair is for wheels of the boom on the permanent way, one pair for wheels of the carriage on the permanent way, and one pair for wheels of the carriage on the boom. The upper faces of the top flanges of the cha'imel beam constitute the way for the pair of wheels 13 which support one end of the boom. The upper faces of the lower flanges of the channel beam constitute the wayon which roll the wheels 23 which support the carriage 22 on the permanent way. The upper faces of the lower flanges of the I-beam'constitute the way on which roll the Wheels 24 on'which the carriage runs on the boom. The carriage is a stirrup 25 whose uprights rise between the I-beam and the channel beams on each side of it, to stub axle trees, one on each Side of the I-beam, each carrying two axles, of which one is for a wheel 23 to run on the permanent way, and the other for a wheel 24 to run on the boom.

There is thus on each side of the'boom a pair of wheels, one of which is alined to run on the boom and one to run on the permanent way; and as the arrangement is symmetrical the carriage will run evenly whether resting on either the two inner wheels 24, on the boom, or on the two outer wheels 23 on the permanent way, or on both pairs at once. Preferably the axles of the wheels 24 may be inclined a little so that their Wheels tip outward, the inner faces of the flanges of the I-beam being made at an angle to correspond, so that' the load tends to center itself in the medial plane; and the wheels 23 which run on the interior faces of the channel beam flanges may be inclined inward a little so that they also tend to center the load in the same plane. While it is expected that the stay 12 will hold the boom in good alinement, with the permanent way;

nevertheless the setting of the supporting wheels 13 at the very end of the boom, causes the ends of the rails on the boom to be always approximately level with-the rails on the permanent way, even though the alinement is faulty, because the distance from tread of wheel 13 to rail at bottom ofI-beam is fixed and equal to the distance from top of rail on which wheel 17 runs to rail at bottom of channel beam. \Vhere these two thus overlap, all four wheels 23, 24,24,23, run on their respective ways; when the carriage is out on the boom the wheels 23 are idle in the air; and when the carriage runs inward beyond the inmost end of the boom the wheels 24 are free in air. It is clear that the travel of the carriage may be executed as freely as if it were running wholly upon 1,

a permanent way, whether the boom'be extended fully, or partly, or be retracted fully.

The extension and retnaction of the boom occur in the direction of its own length. It

therefore can be extended from the side into 11 and through the midst of the rectangular space comprised by a vessels deck and rail, its masts, and deck structures. and its radio wires, or other high longitudinal rigging. This thrusting may be accomplished by any] drawing being a rope vfinitely, according to the suitable means, the means illustrated in the having its two ends secured to the butt end of the boom, by one of which 21 it can be hauled outward and by the other 26 hauled inward. Suitable rope winding apparatus is indicated diagrammatically as a cylindrical drum on shaft 30. The end 21 runs outward beyond the outer tower 14, passes there over a sheave 26, and returns for its attachment .tothe rear end of the boom. The rope end 20 from the drum merely passes over a sheave to its attachment to the rear end of the boom, and pulls thereon in a straight line from the real: part of the permanent way. It is obvlous, however, that any arrangement by whlch' the boom is projected involves a problem in connection with the hoisting rope and the carriage for conveying the load, because the extension of the boom necessarily lengthens the amount of such rope required, and its retraction shortens the same; and this lengthening and shortening may vary inparticular degree to which the boom happens to be extended. There are various ways of solving this problem but the drawings illustrate one which is preferred because of its simplicity and automatic action. This involves combining the carriage and hoist construction which is set forth in my Letters Patent 01. the United States No. 1,18%,051, of May 23, 1916 with the extensible boom herein shown. As that construction is herein illustrated, the carriage is shown on; on the zboelm hin Fig. 1 and carrying" a e rope 2 w ic serves to move the load l i izh vertically and hlorizontally. This rope, rising from the load and running inward from the carriage, passes around a drum 28, represented as electrically driven, beyond which it extends in a bight 27' around a floating sheave 31 which is held npin air by a counter-weight. 3a to which a rope 32 runs from it over a sheave 33 at the top of tower 16. The weight, whose magnitude depends in part on the weight of iced usually carried, can descend until it is arrested at some predetermined point, indicated diagrammatically at 35 as an adjustable platform adapted to receive and support the weight. Beyond the bight 27 the rope 27 passes down under a, fixed sheave 29 on the ground, to complete the bight, and thence runs upward to the top of inner tower 16 where it passes over a sheave 36 and thence runs over a sheave 437 at the top of the outer tower 14 and thence down to the end of the boom, around a sheave 38 there fixed, and back to the carriage 22 to which this end of it is fast. The other end or the same rope, coming outward from the drum 28, passes over a sheave on the same carriage and descends thence in a bight or through such style of tackle and reeving as may be desired to a sheave a0 which sustains the load, whence itrises to an end fastening to the carriage. In the operation of the hoistingand transporting mechanism, the boom being fixed in" whatever position is selected-for it, the drum 28 lifts the load and draws in the carriage by pulling the rope 27 in the direction of the arrow. Assuming the bucket to be'down in the hold of the vessel, the counter-weight 34 will, be in air. The starting of the drum, drawing the rope in the direction of the arrow, first raises the sheave 40 and the bucket. The rope thus drawn in is paid out backward into the bight 27 while the counterweight 34 descends until its descent is arrested at 35. During this time, the carriage is stationary in the position portrayed, for the pull of the counter-weight through that part of the rope 27 that passes around sheave 38 tends to hold the carriage against being drawn inward. But as soon as the descent of the counter-weight ceases the big-ht 27' ceases growing and the rope thereafter drawn in by the drum 28 and paid out backward runs through the bight 27 and around sheaves 29, 38, letting inward as rapidly as the rope 27 is moving, the hoisting action simultaneously ceasing.

Upon the reversal of the drum, as, for ex-.

ample, when the carriage has reached'the dotted line position 22, a pawl or lug (being a detail not herein shown, but explained in my said patent) prevents the carriage from moving outward, so that the paying out of rope 27 in a direction opposite to that of the arrow lets the load down as indicated by the dotted lines. The raising of the bucket and its return to the hold of the vessel are'accomplished by reverse procedure. When this is combined in the present invention,

the single counter-weight 34, withthe bight 27 and the adjustable stop 35, can make an needed adjustment in the length of the forward pants of t'he'rope according to changes in position in which the boom 11 is fixed when extended or retracted.

The suspension of stay 12 at such an elevation as will maintain the boom in alinement with the permanent way while it is being moved out or in is anotherfeature oi the invention. It is obvious that the length of; rope or ropes 12 extending beyond the sheave 17 when the boom is extended as in Fig. 1, is not in simple proportion to the distance to which thGVbOOHI extends, and this support cannot be therefore accomplished by paying out the rope 12 or drawing it in at the rate at which the boom itself moves. There is, however, an ascertainable Varying relation between the extent to which the boom is projected, and the length of rope 12 which is forward of the sheave 17. The solution .of this part of the problem is illustrated by the-provision of a fixed though indirect connection bee the carriagev the tip of the boom by tween the hauling rope 20, 21, and the rope 12, such that the rate at which the rope 12 runs, in different parts of its run, bears at each point a predetermined ratio to the rate at which the rope 20, 21, isrunning .at the corresponding part of its run. The method illustrated in Fig. 5 for accomplishing this consists in providing winding drums 20' and 12 on the same shaft 30, expressing in themselves the predetermined ratio and relations or some function of it. The rope 20, 21, is wound about and controlled by the drum 20. Each rope as the latter is permitted to rise or is drawn back by variations in the length of the bight 43 of a rope 44 whose end portions are wound on a drum 12. Variations in the bight are made by the differential dimensions of the drum. There may be a drum 12' for each rope 12, and all ma beon the same shaft 30 with the hauling rum. One end of a rope 44 is attached to its drum at 44 in the middle portion of the length of the drum and the other at 44" at one end of the drum. The drum has helical ropereceiving grooves and is larger in diameter in the portion over which the rope fastened at 44 is wound than it is" in its portion over which the rope fastened .at'44 is wound. When the drum is rotated in either direction, the rope runs on one portion and off the other portion of it; but the rate of its running at the two portions differs according to the difference between the radius of the drum at the point where the rope is running on at the particular i'nstant and the radius of the drum at the point where the rope is running ofi at the same instant. The design of the drum is controlled by the ratio of length'of stay to length of boom at different degrees of projection of the boom; and this in turn is a functionofthe varying angle formed outside of the outer tower 14, between the stay 12 and the boom 11. Fig. 5 indicates this arrangement somewhat diagrammatically, showing the rope fully wound on the smaller portion-of the drum, and mostly unwound from the lar er portion of the drum. As the portion 0 rope 44 intervening between the parts represented in Fig. 5 contains the bight 43, it is clear that the position indicated is that which corresponds to the longest length of the bight, corresponding to the outward position of the boom, as illustrated in Fig. 1. When shaft 30 and its drums are rotated in such direction as to pay out the rope 21 anddraw in the rope 20, which is the movement for haulingin the boom, the rope 44 at the same time is paid out at that end which is attached at 44 and is wound on drum 12' at that end which is attached at 44"; and thus,

as the drum is portrayed, is drawn in faster than it is paid out. As a result, the bight zontality and so will maintain its 12 is paid out or drawn in by its floating sheave 42 according.

43 is shortened as the tip of the boom moves in; and if the parts are designed so that this shortens at a rate such that-at each instant the ratio between the outboard part of each stay 12, beyond the tower 1'4, and the outboard part of the boom is that of cosecant to cotangent of the angle between these outboard parts, the boom will maintain its horialinement with the permanent way. Contraction of the hoist and traverse rope occurs automatically and simultaneously, the counterweight 34 falling. When the desired-retraction of the boom has been attained, rotation of the shaft 30 is stopped, and the application of any suitable brake or gripping means thereto or to the ropes will hold the boom ready for use.

In the case illustrated, the rate of drawing in rope 12 is only one-half of the rate of decrease of length of rope intervening between the two wound parts of rope 44 that are seen in Fig. 5, and I taken of this or of any other tackle or reeving arrangements which intervene be.- tween the drum 12 and the rope 12,.as also of allowances to correct for' the peripheral contact of rope 12 with sheave 37, and other departures from the strict right-angled triangle which is assumed to be'formed by the boom 11, the point of support at top of tower 14, and the stay 12 in the further explanation which follows herein. the said assumption, the length of rope 12 which is drawn forth when the boom is extended a given distance obviously depends upon the particular dimensions of the in-; stallation and can always be computed. Doubling the total length of rope drawn forth in moving the boom; 71. e. in shifting the boom from the extreme-retracted posia tion to the extreme projected position gives the total variation in length' of the portion of rope 44 which is off of the drum 12; which variation must be provided for by the differential shapeof the drum i. e., by the spiral characteristic of the helical grooves of the drum. It is preferable that the spirals extend over those portions of the drum where both parts of this rope are wound. The pitch of the spiral must be such for each increment of movement of the periphery of the cylindrical drum 20 (which is set on the same shaft and controls the hauling rope) that the drum 12" in turning through the same angle will pay out a net amount equal to double the increment that must simultaneously be added to the suspender rope in order to maintain the boom in its ali-nement. The increment of suspender stay is less than the correspondin increment of movement of the boom, being a small fraction when the boom is well retracted and a materially larger fraction when the boom is well extended,

account must be a Making 7 and being determinable for any given increment of boom movement by a computation which takes account of the trigonometrical relation between the length of suspender stay and length of boom. As this relation can be expressed in terms of a trigonometrical function of the angle between the suspender stay and the boom, which angle can always be ascertained at any position of the boom, the length of the upright 14 spread, if any, between sheaves 17, and projecting length of boom 11 being known, it can be used as the basis for determining what length of suspender rope corresponds to any particular assumed length of projection of boom. By then designing the drum 12 so that, while it rotates through an angle equal to the angle through which the drum 20" rotatesin paying out rope for the assumed movem nt of the boom, it unwinds an excess over t e length which it winds equal to double the required extension of rope 12, the said trigonometrical relation of the stay 12 and boom 11 will have been expressed in the drums 12 and 20. As the extension and retraction of the boom .is always and only for finite and relatively short distances, the relations of the various parts can be plotted and the said angle de termined by measurement or by computation and the appropriate dimensions and design of drums thus ascertained.

Another embodiment of the invention is illustrated in Figs. 6 and 7 which show it applied to a. traveling tower and with the boom constituting the whole of the way, there being no permanent way. In this case, the tower is marked 50, the boom 51, and its outboard suspender rope 52. The tower is adapted to rest on rails 49, and thus to be moved in a direction perpendicular to that in which the boom is thrust? Both ends of the boom are held by suspender ropes, the inboard rope being marked 53, which go over separate sheaves at the top of the tower, at 54, to the drums severally controlling them, indicated as being located at 55. In this arrangement it is assumed that each rope has its separate drum fast on shaft 55 and desi ned according to the same principles as t ose set forth with respect to the drum 12, in the embodiment of the invention equipped at only one end with a suspender rope; but in this case the equivalent of the bight 43 in a separate rope 4A is omitted, and the ropes 52 and 53 are pulled or paid out directly by said drums. A hauling rope for the boom may also be dispensed with, the two ropes 52 and 53 serving that purpose. Or, if desired, a hauling rope like that previously described, or any other suitable arrangement may be added if preferred. In Fi 6, it is assumed that'power is applied to t e drum 55; but it is obvious that if power were otherwise applied for winding rope will operate the other to take up rope. The boom may also have roller supports on the tower, as shown, for illustration, in Fig. 7, where. the boom is an I-beam hanging between and resting on two wheels 56 supported on the tower, which run on the under face of its upper flanges while the carriage hangs from a stirru with two wheels running on the 'upper ace of the lower flanges of the I-beam.

In each case, the weight of the load and boom cooperate with the stay to prevent horizontal motion of the boom at right angles to the direction of travel of the boom.

uch motion can not occur without the end of the boom swinging upward in an arc whose radius is the stay; and such upward motion is to a degree prevented by said weight. It will be more perfectly prevented by using two suspending stays, one from each top corner of the tower, as in Fig. 3, operated identically. However, guys may be used as desired, running to any convenient fixed points of attachment at either side or behind the tower to hold the end of the boom against swinging sidewise after it has been hauled to desired position, or to stifl'en the tower.

It will beunderstood that in making computations the word stay as used herein has reference to the distance from the point of suspension, as the sheave 17, which is at a fixed distance from the boom, to the point of attachment of the stay 'to the boom, the latter being a fixed point on the boom; and that the extent or length of boom for the purpose of computation in connection with the length of stay signifies the distance from the said point of attachment to the foot of a line ropped perpendicularly upon the boom from the point of suspension. If the boom were so retracted that the point of attachment of the stay thereto coincided with the foot of this perpendicular line the parts would be at what is referred to as the zero position, from which the length of boom, and lengths of winding surfaces on the hauling drum and on the stay rope drum are com uted.

T e length of stay is or may be diiferent from the length of rope composing the stay, because said stay may consist of tackle having several plies of rope; and also it is or may be diii'erent from the winding surface of the drum, because it may be, as illustrated, connected thereto through a block, and because the drum is or may be of difierential design, winding on and 01? simultaneously. But these departures from direct and single pl connections merely introduce certain coe cients into the computation and do not change the general structural fact that y the relation of the net winding surface of one drum to that of the other, both being computed from said zero position, is some function of the secant of the angle between it and the boom, with the known or assumed length of the boom as a factor, proper allowances being made for minor departures of actual design from assumed mathematical relations, as, for example, for curvature of rope 12 around sheave 17.

The drums and rope represented in Fig. 5 a"e obviously diagrammatic. In designing a drumfor any particular installation, as for example, for a boom having 24 feet of extension and supported from a sheave 17, 24 feet distant from the boom, with simple reeving, and with grooves in the drum and rope one inch in diameter, the computed dimensions of the drum give a shape of drum that may seem incapable of practical use, because the drum flares so broadly toward the end 44". It is a further feature of the invention to make such a drum practicable by reducing the pitch of the spiral. T hat may be accomplished by either or both of two ways, with of a diflerent type of reeving or by the separation of the drum 12 into two parts coupled, if desired, with the introduction of gearing so that these two parts run at difi'erent peripheral speeds, producingthe result in each case of extending the dimension of the drum 12 in the direction of its axis. Reeving of the style shown in Fig. 9, in which the drum corresponding to 12' is marked 62 and the rope 64 corresponds to the rope 44 having a bight passing around a fixed sheave 6'3 and two floating sheaves on the same axle at 61 doubles the length of the rope that is to be wound'and in consequence requires double the winding space on the drum and thus produces a drum of longer axial dimension, notwithstanding the fact that it incidentally reduces the diameter of rope which is to be wound, which in part countermands the increase of dimension due to increasednumber of turns. A different adjustment that may bedesired in order to produce a practicable shape of drum for certain dimensions of boom and mast, is illustrated in Fig. 10, in which the drum is marked 72 and carries a rope 74 corresponding to the rope 44 whose bight passes around a floating sheave 73 while the rope 70, corresponding to the rope 12, instead of being attached to the sheave 73 passes around a fixed sheave 78, corresponding to sheave 18, and. between that and its anchorage forms a bight which passes around a sheave 71 attached to the floating sheave 73. As compared with the arrangement illustrated in Fig. 1, this halves the length which the 12, whereon the rope portion 41' is wound,

viz: by the combination theresheave 73 has to be pulled in order to produce the desired movement of Suspender rope 70, but increases the size of ropes requisite, and so makes a change in the dimension of drum.

It is desirable that the diameter of drum be not too large; and this can be accomplished by putting a larger number of turns on the drum, thus extending the length of the drum. By reducing the diameter of the drum reduces the peripheral speed and so may prevent the establishment of a proper relation between the two iparts of the drum for getting the desired di erential action on the rope whose two ends are wound thereon. Fig. 8 illustrates apparatus which embodies other principles which may be employed in this design. In this figure, the drum 82' corresponds to the lower half of the drum and the drum 82" corresponds to the upper portion of the drum 12' whereon the rope end 44" is wound, while the drum 80 corresponds to the drum 20 for the hauling rope. All three drums are held in permanent relations to each other by gearing, and the ratio of this gearing may be obtained between tlie drums 82 and 82" for varying the length of the bight of rope whose two ends are wound respectively on drum 82 and drum 82 and the figure further illustrates how the drums which hold the two ends of the same rope may be made to rotate at different speeds, thereby gaining the advantages of relatively small diameter and of practicable shape suitable for meeting a wide range in problems of design that may arise. The division of the drum 12' into two portions as 82' and 82 has the further advantage that it permits the making of a sup- 10 porting bearing in what is equivalent to the middle of drum 12' and another between it and drum 20, thus keeping the bearings close together in order to withstand sturdily the heavy pull which may be imposed on the shaft supporting these drums. It will be understood, however, that the invention is not limited to the use of the particular styles of reeving and arrangements in other respects shown.

I claim as my invention,

1; Hoisting and transporting apparatus, comprising a fixed way; a boom projecting from its end; mounting means whereby the boom is movable in the direction of its own length; and a carriage adapted to run on both said way and said boom.

2. Hoisting and transporting apparatus, comprising a fixed way; a boom projecting from its end; mounting means whereby the boom is movable in the direction of its own length, including wheels on the way at the inner end of the boom and-a rope constituting a stay suspending the outer end of the boom; means to vary automatically the mosses len th of the stay in the proper proportion to' old the boom end in alinement as the boom moves; and a carriage adapted to run on both said way and said boom 3.- Hoisting and transporting apparatus, comprising a fixed'way; a boom projecting from its end; mounting means whereby the boom is movable in the direction of Its own length; said way and boom consisting of a combination of, two channel beams which together constitute time of these elements and an I-beam arranged between the channel beams and constituting the other of these elements; and a carriage adapted to run on either of said elements.

4. Hoisting and transporting apparatus,

' comprising a fixed way; a boom pro ecting from its end; mounting means whereby the boom is movable. in the direction of its own length; said Way and boom consisting of a combination of. two channel beams which together constitute-one of these elements and an E-beam arranged between the channel beams and constituting the other of these elements; said mounting means including an axle having wheels running on the tops of the channel beams and carrying the E-heam thereon; and a carriage adapted to run on the lower flanges of either the hbeam or the channel beams. Y

5. Hoisting and transporting apparatus, comprising a fixed way; a boom projecting from its end; mounting means whereby the boom is movable to telescope the way; said way and boom .each having tracks, parallel to each other; and a carriage, having separate sets of wheels. for the said tracks, each set being arranged to register with its track when the other set is on its track adjacent thereto.

6. Hoisting and transporting apparatus; comprising a fixed way; a boom projecting from its end, said way and boom including a pair of channel beams constituting one element and an lI-beam between them constituting the other element; mounting means 1 whereby the boom is movable inthe direc tion of its own length; and a carriage com prising a stirrup whose uprights rise between the I-beam and the channel beams with wheels adapted to .run on the flanges of the I-beam aiid other wheels to run on flanges of the channel beams; and means whereby either set' of wheels carries said uprights.

7. Hoisting and transporting apparatus, comprising a support; a boom projecting therefrom; a carriage adapted to run on the boom; and mounting means whereby the boom is adapted to move in the direction of its own length, including a rope stay suspending its outer part; means whereby the length of the stay is automatically regulated, varying with the distance of pro ection' of the boom, so that the alinent of the boom in its an direction of movement is maintained.

8. Hoisting and transporting apparatus, comprising a. support; a boom projecting therefrom; a carriage adapted to run on the boom; mounting means whereby the boom is adapted to move in the direction of its own length, including a rope stay suspending the outer part of the boom; a hauling rope adapted to so move it; and automatic means regulating the simultaneous paying out of the hauling-rope and the stay rope in such proportion with respect to each other as to maintain the* said alinement of the boom when it is moved.

9. Hoisting and transporting apparatus, comprising-"a support; a boom projecting therefrom; a carriage adapted to run on the boom; mounting means whereby the boom is adapted to move in the direction of its own length, including a rope stay suspending the outer part of, the boom from a point at a fixed distance from the boom; a hauling rope adapted. to so move the boom; and rope winding drums respectively controlling the hauling ropeand the stay rope, said drums a relation which is a function of the relation of the length of stay to the length of alined boom. projecting beyond the zero position, when the boom is projected to the degree to which the said degree of rotation corresponds.

10. Hoisting and transporting apparatus, comprising a support; a boom projecting therefrom; a carriage adapted to run on the boom; mounting means whereby the boom is adapted to move in the direction of its own length, including a rope stay suspending the outer part of the boom from a point at a fixed distance from the boom; 2. hauling rope adapted to so move the boom; and rope winding drums respectively controlling the hauling rope and the stay rope, said drums being connected together, and shaped and proportioned so that the net winding surface of the stay rope drum, corresponding to the net winding surface of any particular degree of rotation of the hauling rope drum from its zero at extreme inward position of the boom, is as compared with said surface of the hauling rope drums a function of the secant of the angle between the stay and the boom when the boom is in said alinement.

11. Hoisting and transporting apparatus, comprising a support; a hoom projecting therefrom; a carriage adapted to run on the boom; a sheave and combined hoist and traverse rope carried by the carriage; mounting means whereby the boom is adapted to move operating means for the said rope, sald rope passing beyond the operating means around a bight and being guided back to the outward end of the boom and there around a sheave and inward to the carriage and attached to the carriage; there being a sheave in said bight and a counterweight suspended therefrom, taking up the slack produced both by said movement of the boom and by the hoistin operation.

12. oisting and transporting apparatus comprising a support; a boom projecting therefrom; mounting means whereby the boom is adapted to move in the direction of its own length, including a rope suspending its projecting end; a rope for hauling the boom out and in; and drums controlling these ropes, connected together, and differentially shaped and proportioned relative to each other so as to maintain the projecting boom in alinement; the differential drum having a winding spiral of low pitch.

l3. Hoisting and transporting apparatus comprising a support; a boom projecting therefrom; mounting means whereb its own length,

rope for hauling the boom out and 1n; and drums controlling these ropes, connected together, and difi'erentially shaped the, boom is adapted to move in the direction of and proportioned relative to and transporting apparatus a boom projecting therefrom; mounting means whereby the boom is adapted to move in the direction of its own length, includin a rope stay suspending the outer part 0 the boom; a rope having a bight of variable-length controlling said suspender rope; and separate drums for winding the ends of said controlling rope differentially, with journal bearings at each end of each said drum.

15. Hoisting and transporting apparatus comprising a support; a boom projecting therefrom; mounting means whereby the boom is adapted to move in the direction of its own length, including a rope stay suspending the outer part of the boom; a rope having a bight of variable length controlling said suspenderrope; separate drums for winding the ends of said controlling rope differentially; and gearing connecting them,

vwhereby they rotate at different speeds.

" Signed at New York, day of January, 1919.

WARREN TRAVELL.

N. Y., this ninth

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