US842904A - Loading-derrick. - Google Patents

Description

PATENTED FEB. 5, 1907.

N. H. NELSON. LOADING DERRICK.

APPLICATION FILED MAR.17,1006.

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g. NELSON: LOADING DERRICK. APPLICATION FILED MAB.'17 1906.

PATENTED FEB. 5, 1907.

N. H. NELSON. LOADING DERRICK.

APPLICATION FILED MAR. 17, 1900.

3 SHEETS-SHEET 3.

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UNITED STATES PATENT OFFICE.

NELS H. NELSON, OF WILLMAR, MINNESOTA LOADING-DERRICK.

. Specification of Letters Patent.

Patented Feb. 5, 1907.

Application 'filed March 17, 1906- Serlal No. 806,666.

To all whom, it may concern.-

Be it known that I, NELS H. NELSON, a citizen of the United States, residing at Willmar, m the county of Kandiyohi and State of Minnesota, have invented certain new and useful Improvements in Loadmg-Derricks;

and I do herebydeclare the following to be a tions of the parts; and Fig. 3 shows the improved device chiefly in plan, some parts bemg sectioned on the line a m of Fig. 1.

The numeral 1 indicates a heavy post or upright that is rigidly secured at its lower end to a supporting base-frame 2 and is also preferably connected to said base-frame at its upper portionby means of an inclined stay 3. The beam of the derrick is made up of two sections 4 and 5, that slide upon each other exact description of the invento hoisting devices having and are held for true straightdine movements by a pair of yoke-like guides 6, one of which is rigidly secured to the section 4 and loosely embraces the section 5 and the other of which is rigidly secured to the section 5 and loosely embraces the section 4. p

T he endwise-sliding movements of the beam- sections 4 and 5 are made easy by antifriction-rollers 7, mounted in said yokes 6. The beam-section 4 at its lower end is attached to the lowcrportion of the upright 1 by means of a heavy knuckle-joint 8, which ermits the said beam to move (plvotally lioth in horizontal and vertical irect-ions with respect to said upright. The beam section 5 is made'upof a pair of laterallyspaced metallic bars that are rigidly secured together in such manner as to leave a clear space between them. In the extreme outer end of the beam-section 5 is mounted a guidesheave 9, and in the said beam-section farther inward is mounted two Otl1e1"S1I111lL1 guide-sheaves 10 and 11. A rod 12 is loosely pivoted at its upper end to the upper end of the upright 1 and at its free with a sheave-equipped head 13. To raise the load, the free end of the beam of the derrick, a cable 14, which is attached at one end to saidbeam, is passed over or around the sheave of the head 13, under the sheaves 9, 10, and 11, and over the sheave of thetackleblock 15, that is anchored to the lower portion of the upright .1. The free lower end of said cable may be extended to any suitable point and maybe provided with means for attachmentof a horse thereto for the purpose of raisin the derrick-beam. I The s 'ding movements of the beam- sections 4 and 5, the latter upon the former, are

controlled by a cable 16, which is'attached to the inner end of the beam-section 5, is passed over one of the guide-rollers 7 and over a guide-sheave 1 7 on the beam-section 4, and is "attached to a Windlass-drum 18, mounted in a suitable bearing .on the inner end of the beam-section 4 and provided with a handcrank 19, by means of which it may be turned. I The lower flange of the drum 18 is provided with ratchet-teeth 20, with which a retaining-pawl 21 on a fixed part of the beamsection 4 is adapted to engageto lock said drum 18 against rotation to' prevent the beam-section 5 from moving inward on the beam-section 4.

Rigidly secured to the inner and lower end of the beam-section 4 is a transversely-ex-' tended steering-bar 22. Rigidly secured to the lower portion of the upright 1 at the rear thereof is a transversely-extended bearingbracket 23, upon which is loosely mounted a Windlass-drum 24, the shaft of which projects upward and is provided with a hand-wheel 25, by means of which it may be turned. Mounted on the outer ends of the transversely-extended portion of the bracket 23 are guide sheaves 26. Chains 27, that are securedto and wound in the reverse directions on the drum 24, are extended in opposite directions over the guide-sheaves 26, thence over the opposite ends of the bar 22, and are attached at their outer ends to the opposite sides of the beam-section 4. By means of thisdeviee the extensible beam 4 5 may be given horizontal pivotal movements in either direction at will.

Pivoted at 28 to the beam-section 5, just inward of the guide-sheave 9, is a bifurcated fork or scoop supporting lever 29, to the lower ends of the prongs of which is pivoted a fork-like scoop 30. To the free upper end end is provided IIO of the lever 29 is rigidly secured a bracket 31, in which is mounted a guide-sheave 32. The hoisting-cable 14 after it is passed under the guide-sheave is passed up and over the guide-sheave 32 and thence downward and under the guide-sheave 11, so that the tension' on the said cable tends to throwsaid lever into the position shown in Fig. 2.

A brake-lever 33, pivoted to the outer end of the beam-section 5, is provided with a brake-shoe 34, that is adapted to firmly clamp the cable 14 against the under surface of the guide-sheave 9, and to accomplish this a rope or cable 35 is attached to the extended end of said lever 33 and 'is passed through a guide 36 on the upright 1 and thence down? ward', where it is adapted to be rigidly secured by any suitable form of fastener. (Not shown.) Rigidly secured to the rear intermediate portion of the fork is arearwardlyprojecting cam-arm 37, the free end of which is beveled. A latch-lever 38 is pivoted at its upper end to the beam-section 5. This lever 38 is made up of a pair of laterallyspaced metallic straps that are ri idly secured together, but spaced apart to afford seats for a pair of small guide-rolls 39, located near its lower end. Normally the cam-arm 37 en-v gages between the rollers 39, so that the scoop 30 is held ap roximately as shown in Fig. 1. A short lin 40 is pivoted to the lever 29 and is connected to the latch-lever 38 by a slot-and-pin connection 41. A coiled spring 42, attached to the link 40 and to the lever 38, tends to move the latter toward the lever 29.

A cable or flexible connection 43, which, as shown, is passed over a guide-sheave 44 on the upright 1, is provided at its extended end with a pair of flexible branches in the form of chains 45 and 46. The chain 45 is passed under the lower guide-roll 39 of the lever 38 and is attached to the cam-arm 37 of the scoop 30, and the chain 46 is attached to the lower end of said latch-lever 38. The relative lengths of the two chains 45 and 46 is best shown in Fig. 1. The cable 43 and its branches 45 and 46 afford a device for tripping or releasing the scoop 30 from the latch-lever 38 and for rengaging the same with said latch-lever.

Pivoted at 47 to the beam-section 5 is a U-shaped latch 48, the transverse'upper portion of which is adapted to engage with the free upper end of the scoop-supporting lever 29 to lock the same in the position shown in Fig. 2. This latch is subject to a spring 49, which tends to make the same operative, and is adapted to be released by a trip rope or connection 50, attached thereto and passed through a guide 51 on the upright 1.

From what has been said it is of course obvious that the beam 4 5 may be extended or shortened, raised, or lowered and to move transversely in either direction at will, so as proper position to pick up the material to be andled and to load the same into a wagon, whichis conveniently located at one side of the hoisting device.

The fork is adapted to be filled when properly lowered by a downward movement of the beam-section 5 and also by a forwardswinging movement of the lever 29. In or der to hold the fork in the position shown in Fig. 1, it is necessary to ap ly the brake-lever 33, and thereby hold tfie hoisting-cable 14 against the sheave 9 and against traveling movement at that point. When the brakelever 33 is released, the weight of the load on the free end of the fork-beam and the pull on the cable 14 will cause the lever 29 to move into the position shown in Fig. 2, in which moved rearward far enough to permit the cam-acting latch-arm-37 to clear the upper roll 39, and thereby permit the scoop 30 under the action of ravity to tip 1nto the (lumping position s own in Fig. 2. To return the scoop to its normal position with res ect to the lever 29 after it has dumped its oad, it is necessary to pull upon the cable 43, thereby pulling downward the rear end of the scoo and the cam-arm 37 and moving rearward t e lower end of the latch-lever 38 and moving the same into such osition that the cam-arm 37 will automatica ly cam itself past and under theupper roll 39, and hence cause the said lever 38 to again latch the scoop into position for filling.

In Fig. 1 the lever 29 is shown as reversed that is, turned with its crooked upper end projecting for wardand in this case' the fork may be attached to the lower end thereof 1n the same way as already shown, and the lever may be operated by a rope or cable, (not shown,) which could be passed over the sheave 32 and over cooperating guides in various different ways.

The device described is of coursecapable of a great many different uses. By substituting a suitable shovel or beveled sandscoop for the fork 30 a device will be provided which will be well adapted for use in excavating. The device has in practice been found efficient for the purposes had in view.

What I claim is 1. The combination with a derrick having an extensible beam, of a lever pivoted to the outer end of said beam, a scoop pivoted to said lever, means for latching said scoop to said lever and for releasing the same, and means for latching said lever to said beam and for releasing the same, substantially as described.

2. The combination with a derrick, of alever pivoted to the free end of the beam thereof, a latch for securing said lever to said 65 to carry the scoop or fork 30 to and from the l beam. and for releasing the same, a scoop ver ivoted to the outer end of-sai pivoted to said lever, and means for latching said scoop to said lever, and for releasing the same, substantially as described.

3. In a derrick, the combination with a beam and an upright, of a beam-sup orting device involving a cable and guides-t erefor afiording a connection between the upper end of said upright and the outer end of said beam, and extending along said beam to the base of" said upright, a scoop-sup orting led beam and sub ect to said hoisting-cable, a latch for securing said lever to said beam, a trip connection to said latch, a brakelever-applied to said beam and operative to hold said hoisting-cable against movement at will on the sald beam, an-operating connection for said brake-lever, a scoop pivoted to said scoopsupporting lever and provided with an arm 37, a latch-lever 38 pivoted to the said derrick-beam, and operating to engage said arm 37 and lock said scoop with respect to its supporting-arm, and a trip connection 43 having branches 45 and 46 connected respectively to the rear portion of said scoop and the lower end of said latch-lever, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

NELS H. NELSON.

Witnesses:

MARTIN A. ENGER, MATILDA Roman.

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