US1114918A - Lifting-jack. - Google Patents

Description

C. F. SGHLBMMA.

Patented Oct. 27, 1914.

@Lw/lineman lima/nut THF NORRAS PETERS Cn. PHOYaLITHO.. WASHINGTON. D` r CHRISTOPHER F. SCHLEMIVIA, OF PRESTON, IOWA.`

LIFTING-JAGK.

Specification of Letters Patent.

Patented oet. 2v, 1914i.

Application filed August 5, 1913.1 Serial No. 783,130. i

To all whom t may concern Be it known that l, CHRISTOPHER F. SCHLEMMA, a citizenof the United States, residing at Preston, in the county of Jackson `and State of Iowa, have invented certain new and useful Improvements in Lifting- Jacks, of which the followingis a specification.

My invention relates to lifting jacks with special reference to raising and lowering water pipes in and out of wells, and the object is `to provide simple means whereby a pipe may beeasily lowered into andremoved out of very deep wells, in a limited space of time by a single operator without an assistant.

The following specification will definitely disclose how my device is constructed and operated when read in connection with the drawings accompanying the same and forming a part hereof.

Figure 1 is a perspective view of my machine taken from one side. Fig. 2 is a perspective view taken from the opposite side of Fig. 1 and holding a pipe partly drawn out of a well. Fig. 3 is a perspective `view of one of the sprocket wheels with attachments.

Like characters of reference denote corresponding parts in each of the figures.

Referring to the drawings, the frame consists of two metal bars 2 which are united togethenat the base by a cross bar 4.. A short distance above the base is journaled a shaft S upon which is mounted a gear wheel 10 and a drum'12. Above the shaft 8 is journaled another shaft 14 upon which is mounted a small gear wheel 15 which meshes in with the gear wheel 10. Upon the other end of the shaft 14 and outside of the frame is mounted a sprocket wheel 16 which is adapted to be detached from the shaft when transporting the machine. The gear wheels 15 and 16 are rigidly mounted upon the shaft 111, but the shaft is loosely journaled in the frame and is adapted to have an endwise movement in a horizontal plane, whereby the gears 15 and 10 are brought into and out of engagement with each other. To accomplish the horizontal movement of the shaft with the (fears thereon, there is attached to 'the frame above the shaft a cross bar 1S and to this is pivoted a lever 2O having an arm 22 which arm is bifurcated at its lower end 2-1 and encompasses the shaft between the gear 15 and a collar 25 which collar is rigidly secured to the shaft 14. It will be seen by raising and lowering the lever 2O that the gear 155s brought out of and into engagement `with the wheel 10. To lock the wheelslO and` l5 when in engagement with each other, there is provided a dog`26 that is pivoted to thecross bar 1S and adapted to be brought into engagement between the teeth of thegear wheel 15.

At the upper end of the frame the two bars 2 composing the frame are rigidly secured to a block 30 in which block is a Shaft 32 and on which is mounted a wheel 341 in a slot 33 in said block. p Around this wheel 34 runs a cable` 35 which `is provided with a hook 36 at one end and at the other end is secured to the drum l2 near the wheel 10, and arranged to be wound upon one end of the drum inone direction. In the lower corner of the block `30 is pivoted another wheel 38 over which a cord 39 is arranged to travel. One end ofthe cord is attached to and wound around the drum 12 in the opposite direction from the winding of the cable 35 so that when the cable is wound upon the drum the cord is unwound andwhen the cord is` wound upon the drum the cable is l5 and the sprocket, wheel 16 travels an end` less chain 1.6. Against the sides of the block and frame at or neanthe top are secured bracket arms 50 and 51, one on each side and to the arm 51 is pivoted a cross bar 52 which is adapted to rest upon the arm 50. The arm 50 is bent up at the outer end to prevent the cross bar 52 from becoming disengaged.

The manner of using this device is substantially as follows ;-Starting with the pipe A to be withdrawn from the well, the operator lifts the lever 2O bringing the gear 15 out of mesh with the gear 10 and `draws down the cord 35 to the top of the pipe A and fastens it around the pipe by the hook 36. l-le then operates the lever 20 bringing the gear l5 into mesh with the gear wheel 10 and grasping the sprocket chain 46, draws up the pipe to the position shown in Fig. 2 with the upper end back ofthe cross bar 52. Then he secures the lower length B of the pipe so that itwill not drop down into the well anduncouples the upper length A from the coupling D and lifts up the cross piece 52 y bringing the gear wheels on both of the shafts into and out of engagement with each other, a shaft journaled n the upper end of the frame and carrying a sprocket wheel, a sprocket Chain arranged to travel around both sprocket wheels, a pulley pvoted in the upper end of the frame, a cable attached to and Wound around the drum in one direction and arranged to travel over the pulley, a second pulley in the frame, a cord secured to and Wound upon said drum in the opposite direction from that of the cable and arranged to travel around the seoond pulley, whereby the cable can be lowered without movement ofthe two sprocket 15 wheels. u

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

CHRISTOPHER FL SOHLEMMA; Witnesses:

ADALA WENDT, AMBER BUZZA.

Copies oi this patent maybe obtained for ive cents each, byaddressing the #Commissioner of Patents,

Washington, u D. C.

Images