US897581A - Hoisting-machine. - Google Patents

Description

No. 897,581. PATENTED SEPT. 1, 190:; W. M. BROWN.

HOISTING MACHINE.

APPLICATION FILED APR. 20,1908.

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W. M. BROWN. HOISTING MACHINE.

APPLICATION FILED APR. 20, 1908.

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WILLIAM M. BROWN, OF GIBSONBURG, OHIO.

HOISTING-MACHINE Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed April 20, 1908. Serial No. 428,078.

To all whom it may concern:

Be it known that 1, WILLIAM M. BROWN, a citizen of the United States, and a resident of Gibsonburg, in the county of Sandusky and State of Ohio, have invented certain new and useful Improvements in Hoisting-Machines; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to pulling or hoisting machines, and particularly to machines of this class adapted for raising sucker-rods, tubing or other parts from oil or other classes of wells, or for lowering such parts therein.

The object of my invention is to improve upon the machines described in United States Letters Patent Nos. 767,135 and 808,632, granted to me August 9, 1904, and January 2, 1906, respectively, whereby to enhance the practicability and simplify and cheapen the construction thereof, as is hereinafter fully described.

The operation, arrangement and construction of the parts of the invention are fully described in the following specification, and illustrated in the accompanying drawings, in which,

Figure 1 is a central longitudinal section of the mast or pole of my invention with its associated adjusting mechanism and cable drum, the mast or pole having portions thereof broken away. Fig. 2 is a side elevation of a portion of the mast or pole. Fig. 3 is a transverse section on the line a a; in Fig. 2. Fig. 4 is a section of the lower end of the upper mast section taken on the line cc :t in Fig. 1, and Fig. 5 is a side elevation of a machine embodying my invention with a portion of the same broken away.

Referring to the drawings, 1 designates the lower mast section and 2 the upper mast section, which telescope in a manner to permit free relative longitudinal adjustment thereof and have their diameters of suflicient variance to provide an annular space 3 between the same. The lower section 4 has its base rigidly secured to the base frame 1, which is shown as being of rectangular shape and as being pivoted to one end of a vehicle 5 to adapt it and the mast to be placed in elevated or reclining positions relative to the vehicle.

The lower mast section 1- is provided at its top with a head-block 6, which is provided therethrough with a bore 7 that is enlarged at its lower end to receive the end of the section 1 to which it is threaded or otherwise suitably secured, and has its remaining portion of suitable size to center the upper mast section 2 within the lower section and enable it to have free longitudinal adjustment relative thereto. The block 6 is provided in opposite sides thereof with incuts or recesses 8 8, which open into the bore 7 and in each of which is suitably mounted a vertically disposed sheave 9, the edge of which overhangs the annular space 3 between the two sections. Mounted in suitable bearings on the topv of the frame 4 and extending transversely of the mast is the shaft 10, which carries the drums 11 and crank arm 12, thus forming a Windlass to which both ends of a cable or rope 13 are attached. The cable 13 rises from the Windlass at one side of the mast and passes up over one of the sheaves 9, thence down within the annular space 3 between the mast sections, and under the sheave 14, which is mounted in a longitudinal slot 14 provided through the lower end of the upper mastsection 2 and plug 14" secured in said end, as shown. From the sheave 14 the cable eX- tends up through the annular space 3 and preferably over the other sheave 9 and down to and attaches to the Windlass drum at the opposite side of the mast to the point of attachment of the other end of the cable, thus causing a turning of the Windlass to effect a more easy and rapid adjustment of the upper mast section than would be the case if only one end of the cable were attached to the Windlass. The lower end of the upper section is maintained centered within the lower section by studs 15 which project from said upper section.

When the upper section 2 has been elevated to the desired height the adjusting cable 13 is relieved of all hoisting strain by the insertion of a bolt or pin 16 through holes 17 in the lower section immediately below the end of the upper section, thus permitting the upper section to rest on and turn freely relative to the lower section to enable the sheave 18 at the top of said upper section to adjust itself to the direct line of pull of the hoisting cable 19 as strain is applied thereto.

20 designates a power drum to which the cable 19 attaches, and 21 the guy-ropes for bracing the mast when elevated.

It is thus apparent that I have provided simple, cheap and very efficient means for effecting a relative longitudinal adjustment of the mast sections and permitting a relative rotary adjustment thereof to enable the top section to automatically adjust itself when a pulling stress is applied to the hoisting cable so that the sheave 18 at the top of the mast will stand in the direct line of such pull.

I wish it understood that I do not desire to be restricted to the exact details of construction and arrangement of the parts shown and described, as obvious modifications will occur to persons skilled in the art.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is,-

1. In a hoisting-machine, a mast comprising relatively adjustable telescoping sections, and means for adjusting said sections, said means comprising a Windlass, two sheaves carried at the upper end of the lower section on opposite sides thereof, a sheave carried at the lower end of the upper section, and a cable having its ends attached to the Windlass and its intermediate portion acting on the sheaves on said sections to effect a raising or lowering of the upper section when the windlass is turned.

2. In a hoisting-machine, a mast comprising relatively adjustable telescoping sections adapted to have free relative turning movements, the lower section having bolt holes therethrough, a sheave at each side of the lower section at the upper end thereof, a sheave carried at the lower end of the upper section, a Windlass, and a cable attached to the Windlass and acting on said several sheaves, to communicate a relative adjusting movement to the mast sections when the Windlass is operated, and a member adapted to be inserted in said bolt holes to support the upper section in adjusted position and permit a free turning thereof relative to the lower section.

3. In a hoisting-machine, a mast comprising upper and lower relatively adjustable telescoping sections, said sections having an annular space between them, a block fixed to the upper end of the lower section, said block being bored to receive the upper section and center it within the lower section and having incuts in opposite sides thereof in communication with said annular space, sheaves mounted in said mcuts, means at the lower end of the upper sectlon for centering 1t within the lower section, a sheave carried at the lower end of the upper section, a Windlass mounted without the sections, and means cooperating with said several sheaves and Windlass for eifecting a relative adjustment of the sections when the Windlass is operated.

4. In a hoisting-machine, a mast comprising sections adapted to have relative longitudinal and rotary adjustment, a Windlass cable cooperating with both sections for effecting relative longitudinal adjustment thereof, and means cooperating with the sections when in longitudinally adjustable position adapted to maintain them. in such position and to permit a free relative turning thereof.

5. In a hoisting machine, the combination with a mast having adjustable telescoping sections, of a cable having a portion extending between the telescoping portions of the sections and looped under the lower portion of the inner section, and means for taking up or letting out the cable to effect a relative adjustment of the sections.

6. In a hoisting-machine, the combination with a mast-having two longitudinally adjustable telescoping sections, the inner of which is spaced from the outer, a sheave carried at the lower end of the inner section, a cable looped down between the sections and under said sheave, and means for taking up or letting out the cable to relatively adjust the sections.

7. In a hoisting-machine, a mast having telescoping sections capable of relative longitudinal and rotary adjustment, said sections being concentrically spaced from each other, a sheave carried at the lower end of the inner section, a cable looped down between the sections and under the sheave, and means for taking up or letting out the cable to relatively adjust the sections.

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

WILLIAM M. BROWN.

Witnesses:

CORNELL SCHREIBER, C. W. OWEN.

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