US948851A

US948851A - Derrick.

Info

Publication number: US948851A
Application number: US46778808A
Authority: US
Inventors: Albert Forest
Original assignee: NATIONAL IRON CO
Current assignee: NATIONAL IRON CO
Priority date: 1908-12-16
Filing date: 1908-12-16
Publication date: 1910-02-08
Anticipated expiration: 1927-02-08

Description

' A. FOREST.

' DERRICK.

APPLICATION FILED DEC. 16, 1908. 948,851. Patentd Feb. 8, 1910.

2 QHEETS-SHEET 1,

' W1 TNESSES INVENTOR.

. Patented. Feb; 8, 1910.

2 SHEETS-SHEET 2.

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INVENTOR. azww aZ ATTORNEK rinrTnn STATES raTnnT orrror.

ALBERT FOREST, 0F DEER RIVER, MINNESOTA, ASSIGNOR OF ONE-FOURTH 'IO NA- TIONAL IRON COMPANY, OF DULUTH,

MINNESOTA, A CORPORATION OF MINNE- SOTA, AND ONE-HALF TO JOSEPH P. VINCENT, 0F DULUTH, MINNESOTA.

DERRICK.

To all whom it may concern:

Be it known that I, ALBERT FOREST, a citizen of the United States, residing at Deer River, in the county of Itasca and State of Minnesota, have invented certain new and useful Improvements in Derricks; 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.

My invention relates to log derricks and has for its object the provision of a cheap, effective and convenient derrick of improved construction.

It consists of the constructions, combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of the preferred form of my said invention, omitting the hereinafter referred to sheave for the drive belt of the hoisting drum. Fig. 2, is an enlarged rear elevation of said preferred form of my invention, partly broken away. Fig. 3, is a detail side elevation of a brake device forming part of my said invention. Fig. 4, is an enlarged side elevation of a drum rotating device forming part of my said invention. Fig. 5, is an enlarged front elevation of a latch and an enlarged fragmentary front elevation of a frame, and a fragmentary front elevation of a mast, all embodied in my said invention.

In the drawings 1, is a fixed, forwardly inclined surbase, mounted upon a base of any suitable construction as 2, which base 2 is preferably movable along a roadway from one station when the derrick is to be used to another such station. Upon said base is mounted a pivot plate or socket, 3, whereon is pivotally mounted a horizontally oscillatable clevis A mast 5 is pivotally connected to and supported by said clevis. A mast brace 6, is mounted upon said base and preferably extends transversely thereof in rear of said mast, and said mast is preferably supported against said brace by any suitable means, as by a releasable latch 7, which in operation is secured at its ends to the transversely extending portion of said brace, and passes in front of said mast, pivotally supported on said mast by any suitable means is a forwardly directed jib or Specification of Letters Patent.

Application filed December 16, 1908.

Patented Feb. 8, 1910. Serial No. 467,788.

boom 8, upon the forward end of which is supported a sheave 9 adapted to engage a hoisting cable 10. Upon the upper end of said mast is mounted a cap 11, to which are secured suitable sheaves as 12, 13 and 14:, adapted to engage guy lines 1%, 13 and 14*, respectively. The guy line 12 is secured at one end to a drum 12 mounted upon said mast brace, and after passing through one of the sheaves at said cap, its free end is adapted to be secured to a wayside tree or stump, not shown, or to any suitable anchorage. Said line M is secured at one end to a drum li mounted on said brace, and after passing through one of the sheaves at said cap, is adapted in operation to be secured at its opposite end to a wayside stump, or other suitable anchorage. Said line 18 is secured at one end to a drum l3 mounted upon said brace and after passing through one of the sheaves at said cap is adapted to be secured to a stake (not shown) or any suitable anchorage in rear of said base, or to the rearward end of said base. Upon said surbase is pivotally mounted an upwardly directed windlass frame 16, which is inclined forwardly and rests upon said surbase. Upon said windlass frame is mounted a rotatable shaft 17, upon which is mounted a double windlass of greater diameter at one end as at 18 than at the other end, as at 19, said windlass being provided with an annular partition flange 20 between the ends of different diameters. Said hoisting cable is secured to said flange and in operation is wound one or more times around one or the other end of said windlass and thence passes upwardly through an elongated slot or aper ture 21 formed in a rearwardly directed shifting lever 21 which is pivotally supported at its forward end upon a suitable support, as upon said inast-brace. Said hoisting cable thence passes upward and over a suitable sheave 22 mounted upon said mast and thence forwardly and over said sheave 9. A drive belt wheel .43 of any suitable construction is loosely mounted upon said shaft and is adapted to be engaged by a clutch 2-1 slidably keyed to said shaft, which clutch is preferably operated by a train of levers 2%, 2 t 24: and 24 Said belt wheel is engaged by an endless drive belt 25 of any suitable construction, which belt also engages an idler sheave of any suitable construction A secured to any suitable fixed anchorage in rear of said drive wheel, as to a stake or stump in the roadway. Secured to said belt, between said drive wheel and said idler, is a ring, or equivalent device 25*, to which a team of horses may be secured. Upon said shaft is keyed a brake wheel 26 adapted to be engaged by a band brake 26 which is secured at its end to a brake lever 26 which is pivotally secured to a stanchion 26" mounted upon said windlass frame.- Keyed to said shaft are two

ratchet wheels

27 and 28, having oppositely directed teeth. Forwardly of said ratchet wheel. 27, is positioned a pawl 27 adapted in operation to engage said ratchet wheel 27. R-earwardly of said ratchet wheel :28 is positioned a pawl 28 adapted in operation to engage said ratchet wheel 28. Said pawls are enlarged or weighted at their lower ends and are pivotally connected intermediate of their ends to the opposite ends of the body portion 29 of a rock arm which is pivotally mounted intermediate of its ends upon said windlass frame. Said rock arm is provided with a lever portion 29*, extending at an angle to the body portion thereof, which lever portion is pivotally connected at one end to one end of a connecting bar 30, which is pivotally connected at its opposite end to an operating lever 31 pivotally mounted upon said windlass frame. \Vhen said lever is in normal position at center, said pawls are both clear of said ratchet wheels, but when said lever is thrust forward or drawn back ward, one or the other of said pawls will engage its ratchet wheel, and rotate said shaft in one direction or the other as the case may be. Ratchet wheels 12, 18 and 14 and pawls 12 13 and 1 1 are provided for preventing the counter rotation of said drums 12 13 and la as will be readily understood by those skilled in the art; and said drmns may be rotated by hand cranks 32 engaged by the shafts upon which said drums are keyed. Mounted upon a suitable support, as upon a bracket 15 secured to said mast, is a drum 33, to which is secured one end of a guy line 33, which passes thence over a pulley 33 mounted on said mast and thence forwardly to the forward end of said boom, to which it is secured. The said drum 33, may be rotated by a crank similar to said cranks 32, and its counter rotation may be prevented by a ratchet wheel and pawl similar to the wheel 12 and pawl 12.

In operation, the base is fixed in position on the roadway, by any suitable means, as by stakes or pins, A. The idler pulley is then carried out and secured to its anchorage. The team is then connected to said ring and traverses a path between said idler and said base, going back and forth if desired without stop. When going in one direction the team will (provided said clutch is engaged with said drive wheel) rotate said windlass to wind up the hoisting cable, and when going in the opposite direction (said clutch being then thrown out) will rotate the drive wheel idly in the opposite directionor, if at such time the clutch be thrown into engagement with the drive wheel,will operate the windlass to pay out the hoisting cable, said shift lever may be operated to shift the hoisting cable to the larger or smaller end of the windlass so as to increase either the speed or the power thereof with relation to the hoisting cable. The direction of the lead of the hoisting cable along the windlass during the winding operation is governed by the position of the windlass frame on the surbase. Thus, if the windlass frame be swung in one direction or the other on its pivot, one end or the other, of said windlass frame will ride higher on the inclined surbace, and the corresponding end of the windlass shaft will. be lifted out of horizontal and the lead of the cable will be influenced accordingly. The cable may thus be made to lead properly without respect to which end of windlass it is desired to lead toward from said partition flange.

The mast may oscillate in its socket without materially twisting the guys or hoisting cable, and by paying out one side guy line and tightening the other the mast may be tilted sidewise, slightly, so as to give the boom a tendency to swing by gravity over the repository to be loaded.

The ratchet wheels on the drive shaft and their pawls and operating lever form a kicking device, which is adapted to rapidly rotate the windlass to take up slack when shifting the cable from one end of the windlass to the other, or it may be used to hold the windlass while under load to relieve the horses or the brake operator.

Having now described my invention What I claim is 1. In a derrick, the combination of a base, a forwardly inclined surbase, a mast, a boom, a forwardly inclined windlass frame mounted on said surbase and pivoted thereto, and adapted at its opposite ends to ride up or down the inclined plane formed by said surbase, means for rotating said Windlass and a hoisting cable secured at one end to said windlass and supported intermediate of its ends by said boom.

2. In a derrick, the combination of a base, a forwardly inclined surbase mounted thereon and secured thereto, a windlass frame mounted on said surbase and pivotally connected thereto and adapted to swing up or down the inclined plane formed by said surbase, means for rotating said windlass, a mast mounted on said frame, a boom mounted on said mast, a hoisting cable secured at one end to said Windlass and supported intermediate of its ends by said mast.

3. In a derrick, the combination of a base, a surbase mounted on said base and having a forwardly inclined upper face, a Windlass frame mounted on said surbase and having a forwardly inclined lower face corresponding to the inclined face of said surbase and pivotally connected to said surbase and adapted at one end to swing up or down the inclined plane formed by said surbase, a windlass mounted on said frame and comprising a drum of greater diameter at one end than at the other, the enlarged end of said drum being partitioned from the reduced end thereof by an annular flange, a hoisting cable secured at one end to said fiange,'a mast mounted on said base, a boom mounted on said mast, said hoisting cable being supported intermediate of its ends by said boom, means for shifting the inter 5 mediate portion of said cable from the en larged end of said Windlass to the reduced end thereof, means for rotating said Windlass, said means including a drive wheel, an idler sheave and an endless drive belt engaging said drive wheel and idler sheave, means for securing a means of power to said drive belt intermediate of said drive wheel and said idler sheave, and means for braking said Windlass.

a. In a derrick, the combination of a base, a socket mounted thereon, a clevis seated in said socket and adapted to swing horizontally a limited distance, a mast hinged in said clevis and adapted to swing vertically, adjustable means for supporting said mast at an incline or in a vertical position as de sired, a boom mounted on said mast, a wind lass in rear of said mast, a hoisting cable secured at one end to said Windlass and sup ported intermediate of its ends by said boom, and means for operating said windlass.

5. In a derrick, the combination of a suitable support, a rotatable shaft mounted thereon, a Windlass drum keyed to said shaft, two oppositely toothed ratchet wheels keyed to said shaft, a pawl positioned at one side of one of said ratchet wheels and adapted in operation to engage the same, a pawl positioned at the opposite side of the other ratchet wheel and adapted in operation to engage the same a rock bar pivotally connected to said pawls intermediate of their ends, means for operating said rock bar to throw one or the other of said pawls into engagement with its ratchet wheel as desired.

In testimony whereof I hereunto aflix my signature, in presence of two witnesses.

ALBERT FOREST.

Witnesses JAMES T. Lawson, C. T. CRANDALL.