US1691830A - Throwing-off device - Google Patents

Description

Nov. 13, 1928. 1,691,830

G. P. SLATER THROWING OFF DEVI CE Filed July 28, 1926 Patented Nettie, 192s. i I 1,691,836

om ga stares P TEN GUY I. SLATER, OF SAND SPRINGS, OKLAHOMA.

THROWING-OFF DEVICE.

Application filed July 28, 1928. Serial No. 125,498.

The object of this invention is to provide In order to accomplish the result indicated improved means for throwing the ropes off in the most efficient manner, I provide a horiof a bull wheel in a drilling rig, or thelike. zontal shaft 18 having a crank portion '19 A further object is to provide a throwing formed thereon, the shaft being mounted in ,5 off device useful under any similar condibearings, such as 20 and including;- or havtions, and Comprising a drum formed with a ing connected.therewith a hand lever 21 pref- Y spiral groove, rotation imparted to the drum, erably extending to theopposite side of the by frictional contact, serving to guide the derrick, to a pointclose to the usual bull wheel ropes from the grooves of the bull wheel. brake lever. 10 A further ob ect is to provide for inou'nt- Carried by the crank portion 19 of shaft 15 wheel brake lever.

ing the spiral drum on a crank element of a 18 is a drum 23 provided with a spiral groove 5 horizontal shaft adapted to be controlled by. 2%,the groove preferably corresponding ina lever, preferably positioned on the other size or cross section with the grooves 16 of side of the derrick, close to the usual bull the bull wheel; 14:.

In the full line position of F igure 1, ref- With the foregoing and other objects in 'erence being had especially to the spirally view, the invention consists in the novel congrooved drum, the ropes passing over the struction and arrangement of elements debullwheel-do not engage the grooves thereof, scribed, illustrated and claimed, it being unlntin the dotted line position of the spiral derstood that modifications maybe made drum 23, thedruin is frictionally engaged, .within the scope of'the claim, without tie and the rotation of thespiral drum produces parting from the spirit of the invention. lateral movement of the ropes, with the reln thedrawings forming part of'this ap sult thatthe latt r are thrownoff of Wheel plication, r M. This operation'takes place when the lever 25 Figure 1 shows a'portion of a drilling rig: 21 is thrown to the positionof Figure 3.- in

in side elevation, the ropes leading" to the bull the full line position of Figure 1 the lever 21 wheel at the left, being; adapted for engagehas placed. the spiral drum out of service. ment by the drum, shown in dotted line The bull wheel 14- is mounted on shaft 26, l 7 position. I 1 and this shaft carries a Wheel 27 around which 0 Figure Qis anelevati on of the same strucbelt 28 passes, these elements having no pa"- ture, from another angle. t-icular bearing on the present"improvement '75) Figure Sis a PGI'C' ctive view of a crank which relates only to the throwing off device. shaft adapted to mount the spiral drum, the Vfhat is claimed is: shaft having anup-turned portion at one A device for throwing a rope from a wheel,

35 end, constituting a lever. said device comprising a spirally grooved A portion of a rig is shown conventionally drum mounted to impart lateral nioveinent and includes theelements 10,11, 12 and 13, a tothe rope with reference tothe drum, and a bull'ivheel at the left of theview being desiglever controlled rock shaft of the crankshaft nated 14. ype mounting'thedrum formovement in an Ropes such as 15 pass over the wheel, and arc-shaped pathvwhile said drum i intains the latter is provided with grooves 16 for the parallel relation with. the axis of re tio accommodation of the ropes. and the object the Wheel. c 7 i r v I I of the presentdevice is to throw off the ropes I In testimony whereof l affix my signature. when required. w r GUYP. SLATE-RI n of i

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