US1653432A - Portable derrick - Google Patents

Description

Dec.v Z, 1927.

' J. HANSEN PoRTABLE nmucx 2 Sheets-Smet 1 Filed April 21. 1925 ne f6 7 '25 2 Sheets-Sheet 2 l QN @v www mw vas l to themast, and comprises a 'platform 7,-

Patented Dec. 20, 1927.

UNITED erg-,ArasV PATENT oFFIca y JENsHANsEmoF SUPERIOR, WISCONSIN.

PORTABLE D11-:BRICK` A Appucation mea Apru 21,1923.: serial N9. 133,779. A

gitudinally of the beam.- The yopposite end. of the load beam isnprovided with'a loadl compensating weight, Icapable 'of adjustment f longitudinallyl ofthe beam to vvary its.y com- '.pensatingeffct on" theload in. accordance j with'the=`weight of that load Thusfthe derricl; is adaptedv to-handle loa-dsA whichv ordinarilycould not be taken care. of with#y out' the adjustable compensating weight.

The loadfbeam is adapted for rotation about a iiXed standardor mast, and this ro'-V tation is `controlled at willfand `in vdegree byl the operator, land the rmovably-supported base forthe derrick is provided'with meansl wherebythe derrickxmay lbe shifted from place to place, as: desired. i vThe invention is lillustrated in the accompanying drawings, -showing the preferred construction, and in which':-4k

Fig. 1 is a p'erspectlve view ofthe iIn-v j 1s provided nearftheupper end lwith a pinproved derrick. f

Fig. 2 is a longitudinalsection through the load beaml Y t Fig. 3 is a transversejsection ytakenjjust above .the platform.l

Fig. 11 is a sectional View, the

platform mounting.

The improved derrick comprises a basel,

preferably of skeleton metallic formatiom'. mounted on self-adjusting wheels yor :rollers 2, l to permit movementl `of' ,the derrickv from` place to place.'

A bed plate 3 is supported'above the base by 'inclined` struts '4: rising. fromthe base, and ajmast 5 is secured in a block 6,-carried byfa ,cross framegsecured vto the bas'e,.theY

mast rising through the bed' plate to an appropriate height, and being thus fixed with end shafts or aXles'28, carrying wheels or relation to' the 'base 1.'; v i

The movable portion of the derrick superstructure is mounted for rotation relative supportedon the .bed plate. 3' through a ball bearing 8, and a load-beam 9 arranged near the upper end; of the. mast, andV supported a lower plate 14. on which the beam rests.

from the platform 7 by linclined framing bars 10.

' The load beam comprises a skeleton framework, preferably rectangular, and provided with a sleeve' bearing portion 11 hav-V ing ball-bearing connection at the upper and j lower ends with the mast, the sleeve includ- 1ng an upper plate 12 from which the load beam issupported by hanger braces 13, and

`Itis to be particularly noted that the load beam is of unequal lengths von the respective sides of the mast-bearing' sleeve, the one or load side, indicated generally at 15 being of less length than the other or compensating side, indicated at 16. The frame bars making up the load beam properare angle bars, the horizontal portions forming trackways 17 while the vertical portions are connected with the upper 4sleeve, plate 12 by adjustablev tiev bars 18. j

The superstructure isthus 4freely rotatable about *the mastv as'an axis to position the load beam for picking up or delivering the load, and the' load beam/is manually controlled in this'turning movement, through,y

a'rod mounted at the upper end in the lower sleeve plate 14, and at the lower 'end in one of the side plates 19 connecting the inclined framingbars 10 on each side. Thisrod 20 ion 21, Aadapted tok engage a gear secured on the mast 5, a pinion 22 being secured on the rod Ynear the lower end to engage a gear 23 supported in one of the side plates 19. The sha-ft of the gear 23` extends beyond the side plate and is shaped to receive a handle 24, whereby the rod may be turned, rand thus the superstructureV moved on the mast as a center to any desired position.

The trackways 17 ofthe load beam Support two carriages 25 and 26 for trav-el on opposite sides of the sleeve 11, one carriage 25 being hereinafter termed the load carriage, and thev other, 26, being hereinafter termed the compensating carriage. These carriages are substantially identical vrin construction, and comprise bodies 27, having rollers 29 for'free travel on the trackways 17.

The carriages are designed to be adjusted lengthwise the trackways in accordancewith conditions, as hereinafter pointed out, and this adjusting means is designed forcontrol bythe operator; In vt-he case ofthe load carriage 25, an operating cable 30 is terminally wound about one drum 31 of a two-drum shaft 32 mounted in the side plates 19, this cable 30 extending upwardly and over one pulley of a three-pulley block 33 secured to a collar 34 fixed to the sleeve 11. The cable 30 then extends over a pulley of a. two-pulley block 35 secured to one end of the carriage, then over aI second pulley of block 33 then over the second pulley of block 35, and terminally secured to the carriage. The remaining cable for this load carriage. as 36,-` is reversely wound about the other drum'37 on shaft 32. and extends' upwardly over theA remaining block of the pulley block 33,

thence to the extreme end of the load side" of the beam, over a pulley of a: two-pulley block 38, secured tothe load beam, rearward ly to and over a pulley of a two-pulley block 39, secured to the proximate end ofthe' carriage, Athen forwardly over the remaining pulley' of block 38, back over the remaining pulley of block 39,` and' terminallyl secured to the carriage.

The compensating carriage is arranged for control in an identical manner, that is a cable 40 is mounted on one drum 41 of a two drum shaft 42 mounted in the side plates 19, this cable cooperating withl a pulley-block 43 on the sleeve 11 and a pulley block 44 on the compensating carriage, similar toi the connect-ion of the cable 30 with the load carriage. A second cable 45 wound about they second drum 46 of shaft 42, cooperates with the pulleyv block 43, with pulley block 4'? at the end of the load beam, and with a pulley block 48 on the carriage, the arrangement being similar to the connection ofthe cable 36 with carriagef25. 1

The drum shafts 32` and 42 have geared connection with adjacent countersli- afts 49 and 50, respectively, these counter shafts being' mounted inthe side plates 19, and being formed beyond one of such` plates for the reception of operating handles, whereby the carriages may be moved to any desired posrtion lengthwise the trackways 17, as will be evident.

A load lifting means, such as a cable 51 is suspended from the. load carriage 25, and desir-ed` pulley-multiplication for this cable being provided, and the end of `the cable being wound over a drum 52 on shaft 53, mounted iny the side plates 19, and geared to a countershaft 54 mounted in the side y plates and adaptedfor opera-tion by a hanhung therefrom in a mann-er te permit itsreplac-ement when necessary.` This weight acts as a counterbalance to the load being lifted, and it is appare-nty that'by moving the respectivecarriages to appropriate relative distances lfrom the sleeve 11, the weight may be made to counterbalance any load.

The load end of the beam is of less length than-the compensating end, and hence the weight may be positioned through movement of the carriage on which it is supported to different distances from the sleeve l11, ,and thus offset the weight effect of the particular load'on the beam... This arrangement .per-

y-m-its the derrick to handle loads whic'h'it could. nototh-erwise handle without tipping the load beam.

The 'derrick as a whole is adapted tol be moved from place to place, and fork convenience inshifti-ng the 'derrick thel load cable i passed to center the same relativey toV the base'.

form 7 is positioned a.bove-the,base a sufficient distance to allow theoperator posi'-l tioned on such. platform ai viewi ofthev work in hand, and may be'y convenient of access through a ladder or steps` 61.

Itl is to be particularly imted that thecontrol of bot-hv carriages, the control ofthe load cable, and the turning' of the -super-Y 'structure as a whole, isiV withiny the convenient reach and government of a single operator',

thus enabling'one man to arrange the co'un- V terbalance and position'the load. carriage, operate the load lifting' cable,y andE turn the" superstructure, through manipulation of the proper crank handles, without leavinghis:

position on the plat-forni'-` Having thus described,Y the what is claimed. as' new, isz-f- Y Y 1. In a portable` derrick', a movablet base', a1 mast rising therefrom and rigidly secured thereto, a platform rotatabley on the mast above" the base, a load beam rotatable on the mast-above the platform, means for rotatably supporting the beam at spaced points inventiom on the mast, and bearings interposed at such' spaced points and below the platform.

2. In a portable derric'k, a base, a mast secured thereto ,and rising therefrom, a-bed plate encircling the mastl and carried by thebase, a platform supported for rotative movement onv said bed plateand relative 'to-V the mast, a bearing between the platform and bed plate,.a load beam extending in both di'- rections beyond the mast, al sleeve forming part of said load beam and' adapted tobe-arlis y rangedV alignment lwith'y the mast, and up per and lower' bearings between' said sleeve and mast.

3..v In a` portablev derrick, a base` a. mast' secured thereto and rising therefrom, a bed plate encircling the mast and carried by the base, a platform supported for rotative movement on said bed plate and relative to the mast, a bearing between the platform and bed plate, a load beam extending in both directions beyond the mast, a sleeve forming part of said load beam and adapted to be arranged in alignment with the mast, upper and lower bearings between said sleeve and mast, frame bars` arranged intermediate the platform and load beam to rigidly connectY late encircling the mast and carried by the ase, a platform supported for rotative movement on said bed plate and relative to the mast, a bearing between the plat-form and bed plate, a load beam extending in both directions beyond the mast, a. sleeve forming part of said load beam and adapted to be arranged yin alignment with the mast', upper and. lower bearings between said sleeve and mast, and means for rotating the platform and load beam including a rod movable with Y,

the platform and independently rotatable, means for rotating the rod, a pinion carried by the upper end of the rod, and a gear fixed on the mast to be engaged by the pinion.

In testimony whereof, I aix my signature.

JENS HANSEN.

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