US1052915A - Construction of calf-wheels for oil-derricks. - Google Patents

Description

J. T. HALL.

CONSTRUCTION OF GALE WHEELS FOR OIL DERRIOKS. APPLIGATION FILED DEG.9, 1911.

Patented Feb. 11, 1913.

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J. T. HALL. CONSTRUCTION OF GALF WHEELS FOR OIL DERRIOKS. APPLICATION FILED DEG. 9, 1911.

1,052,915. Patented Feb. 11, 1913.

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WTTED STATES rarest orrrcn JAMES T. HALL, OF COALINGA, CALIFORNIA, ASSIGNOR T0 BUNTING IRON WORKS, OF COALINGA, CALIFORNIA, A CORPORATION OF CALIFORNIA.

CONSTRUCTION OF GALE-WHEELS FOR OIL-DERRICKS.

Application filed December 9, 1911.

Specification of Letters Patent.

Patented Feb. 11, 1913.

Serial No. 664,713.

T 0 all whom it may concern Be it known that I, JAMEs T. HALL, a citizen of the United States, residing at Coalinga, in the county of Fresno and State of California, have invented certain new and useful Improvements in Construction of CalfJ Vheels for Oil-Derricks, of which the following is a specification.

The hereinafter described invention relates to an improved construction of a calf wheel for derrick mechanism used in connection with the sinking of oil wells, the object being to provide against scorching and frictional wear of the cable as wound onto and off of the calf wheel and by so doing materially prolonging the life and usefulness of the said cable.

To comprehend the invention reference should be had to the accompanying sheet of drawings, wherein Figure 1 is a longitudinal sectional view of the improved calf wheel illustrating the same as applied to the sustaining shaft therefor. Fig. 2 is a cross sectional View taken on the line 00-00 Fig. 1 of the drawings. Fig. 3 is a similar view taken on the line g z Fig. 1 of the drawings. Fig. 1 is an enlarged broken detal View illustrating the manner of securing the outer covering to the inner metallic shell.

In the drawings, the numeral 1 is used to designate a suitable sustaining shaft which is secured against rotation within bearing plates 2 attached to the frame pieces 3 of the oil derrick, the ends of the sustaining shaft rest within these bearing plates and are held therein against rotation by means of the stirrup bolts 4L which pass through suitable bolt holes in said plate and through the frame pieces 3, being drawn tight by means of suitable nuts screwing onto the projecting screw-threaded end thereof.

On the sustaining shaft 1 is mounted for free rotation a shell 5, preferably constructed of metal, from the inner face of which project a plurality of series of circumferentially disposed lugs 6, which bear onto the surface of the sustaining shaft 1 and strengthen the shell 5 against compression strains placed thereon on the winding of a cable onto the exterior surface of the said shell. This shell is supported at its ends by means of the bearing hubs 7 and 7 which are united thereto by the radially disposed pins 8, the bearing hub 7 being further secured to its end of the shell 5 by the square key 9, which removes from the pins 8 at such end of the shell the shearing strains which would otherwise fall thereon.

The rotatable shell 5 is held onto the sustaining shaft 1 against endwise movement by the adjustable collars 1O loosely mounted on said shaft and held thereto in adjusted position by the set screws 10. These collars are adjusted to bear freely against the ends of the bearing hubs 10, to hold the same against longitudinal slippage on the sustaining shaft 1. The said bearing hubs 10 are each provided with a circumferential flange 11 for holding the cable onto the calf wheel as wound thereon, and with an inner bronze bushing 11, and lubricant is delivered to the said bushings by means of the pipe tap bore 12 formed through each end bearing hub and the bushing thereof for directing the lubricant to the surface of the sustaining axle 1.

The shell 5 is formed with a series of longitudinally disposed projections 13, which are spaced an equi-distance apart circumferentially of the said shell. These projections serve as retainers for the outer layer or wear surface of the shell 5, the same being composed in the present case of a series of longitudinally disposed segmental wooden strips 14:, approximately one and one-quarter inch in thickness, preferably being formed from maple. These are known to the trade as lagging strips and in the present case three such strips are placed between each two of the longitudinal projections 13. These strips are built up so as to cover the entire exterior surface of the shell 1, the two outer strips of each series held between the projections 13 having their outer edges formed to partly overlap the upper surface of the said projections, the center strip of each series or section of longitudinal strips serving as a key strip, which key strips are secured to the metallic shell 5 by means of the screw bolts 15, the head of each being countersunk in the lagging strips. The key strip of each series of the lagging strips serves to wedge the outer strips of the se ries securely against the inner wall surface of the shells projections 13, thus holding the same firmly in place. This outer surface to the shell 5 being formed of wood or other yielding material, the cable winding onto and ofl the calf wheel is not subjected to the same wear action as though wound onto and off of a metallic surface, in fact, the yielding surface thus produced is suflicientto eliminate the frictional wear to which these cables are ordinarily subjected and by so doing providing against the excessive wear which falls thereon, thus materially prolonging the life of such cables.

Having thus described the invention what is claimed as new and desired to protect by Letters Patent is In a calf wheel construction for oil derrioks, the combination with a fixed sustaining shaft, a metallic shell mounted thereon for free rotation, end bearing hubs loose on the sustaining shaft and secured to said shell, devices for holding the shell against endwise movement with respect to the sustaining shaft, a plurality of annular projections rality of longitudinal parallel spaced projections extending throughout the circumference of said shell and an exterlor ielding wear surface for said shell consisting of longitudinally disposed segmental strips, fitted within and between the external projections of the shell, certain of said strips secured to said shell and providing means for detachably uniting the wear surface to said shell.

In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

JAMES T. HALL.

Witnesses N. A. AcKER,

D. B. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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