US1374444A - Hoisting apparatus - Google Patents

Description

A. conm'. HOISTINGAPPARATUS. APPLICATloN. FILED ocr. 1S. `1919 Patented Apr. 12, 192:1.

WIT/VESSES UNirED STATES ANNIE GLTRY, 0F NORTH PLATTE, NEBRASKA.

HOISTING APPARATUS.

Application filed October 18, 1919.

To @ZZ whom t may concern Be it known that I, ANNIE GOLTRY, a citizen of the United States, residing at North Platte, in the county of Lincoln and State of Nebraska, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

My invention relates to hoisting apparatus and more particularly to that type of devices which may be effectively employed as a log jack for elevating logs whereby they may be sawed or otherwise treated.

' An important object of my invention is to provide a device including means whereby a load may be elevated and retained in said position.

Another important object of the invention is to provide a device of this nature which includes means whereby the grapple may be automatically lowered from its elevated position.

Another object of the invention is to provide a device of the above nature including means whereby the load is securely gripped and held in this manner while it is elevated.

A still further object of the invention is to provide a device of the above nature which is strong, durable, comparatively inexpensive to manufacture, and is highly efficient in practice.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the accompanying drawings v Figure 1 is a side elevation of the inven tion in use, parts of the same being broken away, and Q Fig. 2 is an end elevation of the same.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of the invention, the numeral 3 designates a frame in general, which consists of a' pair of vertically arranged arched members 4, retained in spaced parallel relation by spacing elements 5, some of which consist of bolts while others are sleeves, the latter being mounted upon elements .to be hereinafter described. The lower ends 6 of the arched members 4 are extended outwardly of the members to be connected by bars 7.

A lever 8, substantially ogee in configuration is pivotally mounted adjacent its inner end, upon a shaft or bolt 9, and is retained in spaced relation between the arched mem- Specication of Letters Patent.

Patented Apr. 12, 1921.

Serial No. 331,626.

bers 4 by spacing elements 5. 'As will be seen in Fig. 2 of the drawing, this lever is mounted upon the shaft 9 adjacent one of the arched members 4 whereby the operating mechanism for the lever may be disposed adjacent the co-acting arched member, as more clearly shown in F ig. 2 to permit eiiicient operation of the various` parts of the invention.

A grapple or lazy-tongs 10 is employed to grip the load, and the upper ends of the lazy-tongs are connected with the inner end of the lever 8 through the medium of links 11, whereby a firm grip is obtained upon the load by the lazy-tongs to prevent accidental dislocation.

The outer end of the lever 8 extends a substantial distance beyond the frame 3 to be connected at its outermost end with a cable 12, which is wound and secured upon a drum 13 journaled upon a shaft 14, which connects the lower end of the arched members 4 upon one side of the frame. A sprocket wheel 15 is secured to the drum 13 adjacent one Vof the arched members 4 and meshes with a smaller sprocket wheel 16 secured to a shaft 17 mounted transversely through the arched members the proper distance above the shaft 14. Each face of the sprocket wheel 16 'is equipped with a disk 18 of the same diameter as the sprocket wheehwhereby these disks prevent disengagement of the sprocket wheel 16 with the wheel 15. As is customary. the spacing elements 5 are mounted upon the shaft 17 upon each side of the sprocket wheel 16 whereby it is retained in its proper position to effectively engage its co-acting sprocket wheel. The shaft 17 is equipped withv a crank 19 to permit the operator to easily operate the lever operating mechanism. A gravity pawl 20 is pivot- .ally mounted upon a bracket 21 secured to the frame directly above the sprocket wheel 16 whereby the working end of the pawl 20 normally engages the-teeth of the sprocket wheel 16. This paw] 20 prevents retrograde movement of the sprocket wheel 16 but when it is desired to permit such movement of the sprocket wheel 16 thehandle 22 of the pawl is engaged, which action `disengages the working end of the pawl.

When the grapple is in an elevated position and it is desired to automatically return the same to the ground for engagement with the load, the pawl 2O is disengaged from the sprocket wheel 16 to permit reaction of tance beyond the center oiC the lazy tongs,

and it extends upwardly oit the iframe a substantial Vdistance so that by connecting oneend of the spring 23 to the uppermost edge of this bracket, the spring will have a greater effect upon the lever 8 during the reaction ot the spring.v

In operation, it will be nanilfest that the spring 23 normally retains the various parts of the invention in suchposition that the grapple or lazy-tongs l0 are always in a position to receive a load or log. Consequently the lazy-tongs are first adjusted to ei'ectively grip the load, after which the crank 19 is actuated to impart a clockwise rotation to the sprocket wheel 16, which in turn imn parts a counter clockwise .movement to the larger sprocket wheel l5. As the drum 13 is rotated with the sprocket' wheel l5, it will be manifest that the cable l2 will be wound thereon and consequently the outermost end of the lever 8 will b'e moved downwardly causing its inner end to ascend and the coill spring 23 to expand. Ot course7 the links 1l and lazy tongs lO will be elevated together with the load, while the working end of the pawl 20 slips over the teeth of 'the sprocket wheel 16. Y'When the load has been elevated to the desired height, its descension is `prevented by the pawl 20 engaging the sprocket wheel 16. However, after the load Y has been treated or the loo sawed the working end of the pawl 20 may be disengaged from the sprocket wheel 16 thereby permitting ready reaction of the coil spring 23 and the pivotal movement of the lever S to re-V turn the grapple to the ground.

The foregoing description and accompanying drawings have reference to what sions, et cetera, as may prove expedient and e tall within the scope of the appended claims.

'Havingthus fully described my invention what l claim as new and desire to Ysecure by Letters Patent, is

l. fr hoisting apparatus comprising a frame, a lever pivoted adjacent one end to the trame.y grapple means connected to the ond ot the lever adjacent its ulcrum7 means connected with the other end or the lever 'for actuating the same, and means tor automatically lowering the grapple means.

2. ne hoisting apparatus comprising a Ytrame7 a lever pivoted adjacent one end to the frame, grapple means connected to the end or" the lever adiacent its i'ulcrum, means connected to the outer end or" the lever Ytor actuating the same, and a coiled spring having one end connected to the lever and .its opposite end connected to the trame' i'or automatically lowering the grapple.

3. A hoisting apparatus comprising a frame, a lever pivoted adjacent one end to the trame, grapple means connected to the end ot the lever adjacent its tulcrum, means connected with the other end of 'the lever yigor actuating the same, an arm secured to the frame and projecting above the ulcrum of the lever, yand a coiled spring having one end connected to the lever and its opposite end connected to the free end ot said arm er automatically lowering the grapple.

ln testimony where it l :fl'lix my signature iu presence of two witnesses.

ANNUL GOLTRY

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