US1350994A - Stump-puller - Google Patents

Description

'1. F. GORMAII.

STUMP FULLER.

APPLICATION FILED DEC.29I I9I6.

#Vif/1.955195:

J. F. GORMAN.

STUMP FULLER. APPLICATION FILED DEC. 9, IsIs.

J. F. GORMAN.

STUMP FULLER.

APPLICATION FILED DEc.29, 1916.

Patented Aug. 24,1920.

3 SHEETS-SHEET 3.

Y a site ...alas f JOHN F, GORMAN, (3F-SEATTLE, WASHINGTON.

STUMP-PULLER.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application led December 29, 1916. Serial No. 139,663.

adapted to be anchored to a iixed object,

and by means of which pull'can be applied to a cable passing through said mechanism.

Among the salient objects of my in'venf tion are,-to provide an improved mechanism of the character referred to, by means oi which pull can be applied to a cable pass ing through said mechanism by the operation of a lever, which is connected withv and operates gripping devices adapted'to alter` nately grip the cable; to provide in a device of the character referred to means 'whereby said mechanism can be operated to release the pull on said cable, step by step, without letting loose of the same; to provide in a device of the character referred to means for getting various operating speeds.

ther objects and advantages will be apparent from the following description of one practical embodiment of my invention, taken in connection with the accompanying three sheets of drawings in which,-

Figure 1 is a side elevation of my invention, with parts shown in section;

Fig. 2 is a side elevation of one of the lower gripping jaws, adapted kto grip the cable;

Fig. 3 is a cross sectional View thereof, taken on line 3 3 of Fig. 2, with the upper gripping jaw indicated in dotted lines;

Fig. l shows` side and edge views oi' one ot the operating segments which coperate with the gripping jaws, shown in Figs. 2 and 3;

Fig. 5 is a side elevation oiI my invention with the reverse mechanism set for operation;

Fig. 6 is a vertical cross sectional view of the device taken on line 6 6, Fig. 1;

Fig. 7 is a combination vertical and hori` Zontal cross sectional view taken on line 7-7 of Fig. 1; and

Fig. 8 is a fragmentary top plan view of that part of the mechanism shownin Fig. 1, to which the section line 7-7 is applied.

Referring now more in detail to the drawings, my invention comprises a main frame composed of top and bottom guide rods 1 and 2, connected together at their opposite ends by means or vertical connecting heads 3 and 4, and connected near their middle portions with an intermediate con` necting member 5, as clearly shown in Figs. l and G. Pivotally connected to the opposite sides ot' the connecting member 5, is a vertical lever structure 6, the two side members of said lever structure being pivoted as at ll, Fig. 6, upon laterally projecting studs on shafts 8 8, which also constitute bearing shafts for two supporting wheels .9-9, as will be clear from Fig. 6. The sides of the vertical lever structure 6, are spaced apart suiiiciently so that said lever structure is free to be rocked, in opposite directions longitudinally of the guide rods 1 and 2, in a manner now to be described.

A mainoperating lever 10, is pivotally connected, as at 11, to the connecting head 3. Said lever 1G, is connected by means of a link, or pitman, 12, with the operating lever structure 6. In order that the opposite ends of said link, or pitman, 12, may be connected in different positions to the operating lever 10, and thus make possible various speeds, said .operating lever is provided with diiferent connecting holes, as '1S-13.

The lever structure 6, is also provided with additional adjustment holes'as (Sil and 6b. Thus it will be seen that as the lever 10 is rocked on to its pivot 11, the lever structure 6, is likewise rocked on its pivot mounting, at 7, said levers being shown rocked to the eXtreme right in Fig. 5.

Slidably mounted between the guide rods 1 and 2, near their opposite ends, are two grip boxes 14 and 15, each composed of two pieces bolted together at their corners, as by means of bolts 14.- and 15. Said grip boxes are each provided on their opposite sides with projecting lugs 14a and 15, by means of which said grip boxes are connected with pitmen 16-16 and 17--17, to the vertical lever structure 6, as at 16a and 17a. Thus it will be understood that by rocking the main lever 10, and the vertical lever structure 6, said grip boxes 14 and 15, are moved toward and from each other on said main frame.

Said main frame is provided at its connecting head 3, with an anchor hook 18, by means of which, and a cable 19, said main frame can be anchored t0, any fixed object,

vMounted in each of said grip bo-xes 14V and 15, is a pair of gripping jaws 21-21 and 22-22, said jaws being provided atV their opposite sides with lug members as 21a- 21n and 22-22, which move in grooves 21h-21', and 22h-22", formed in the inner faces of the sides of the grip boxes,

' as will be clearly understood by reference to F 7, and also to Figs. 1 and 5.' This interfitting between the opposite sides of the jaws and the inner opposite faces of the grip boxes, tends to hold the gripping jaws in proper relationship, even though there may be no pull cable passing through the machine and between said gripping jaws, and at the same time said grooves permit said jaws to move toward each other into gripping engagement with the cable as Vthey move in one direction and to move away fromA cach other and outof gripping engagement with the cable,.as they are moved in the opposite direction.

Mounted in each of said grip boxes 14 and 15, above and below said gripping jaws and 22-22, are eccentrieally formed segments, as 23, said segments all being alike and being pivotally seated at their outer ends in the sides of the grip boxes 14 and 15, and atv their inner ends being provided with teeth which interfitwith the backs of the gripping jaws 21-21 and 22-22, as will be clearly understood from Figs. 1 and 5. In 'F ig. 4, is shown an enlarged detail of these eccentric segments, which are preferably constructed with a portion of their outer ends formed into a smooth eccentric face, as 23a, and a portion thereof provided with the teeth, as 23". Thus Vthe teeth portions 23b are adapted to interlit with the backs of the gripping jaws 21-21 and 22m-22', while the smooth eccentric face portions 23a, bear upon the smooth portions of the backs of said gripping jaws, as may be more clearly understood from reference to Figs. 2 and 3', taken in connection with Fig. 4.

Mounted in the left hand ends of the grip boxes 14 and 15, are coiled expansion springs 24 and 25, through which the pull cable 20 passes, which springs normally bear inwardly against the gripping jaws 21-21 and 22-22, tendingto force said jaws normally into gripping engagement on the pull cable 20, for as said gripping jaws 21 and 21, in grip `box 14, Fig. l, for example, are forced to the right by said spring 24, they are also forced toward each other, and into gripping engagement with the pull cable 20, by the eccentric segments 28-23- Said main lever is provided Von its opposite sides with Ahand grips, as 10, by means of which said grip boxes alternately gripping and advancing the cable through the machine. For example, in Fig. 1, if the lever 10 is moved 'to the right, grip box 14 will `be forced to the left, its eccentric segments 23 and its spring 24 operating to force the jaws 21 and 21 into Ygripping engagement with the pull Y cable 20, and thereby pulling the cable with it. During this operation the grip box 15, is being forced to the right and slides over Vthe cable for the reason that its movement relative to the cable, and the set of Vits eccentric segments 23, is such that its jaws are not forced into gripping engagement with said cable, but are sufficiently loose to slide over the cable to the right. As the lever 10 is moved to the left, the grip box 15, is also moved to the left, gripping the cable and pulling it therewith, at the same time thrusting, as it were, the free end of the pull cable 20, through the grip box 14, which is moving to the right. Thus by oscillating the main lever 10, and alternately moving the grip boxes 14 and l5, away from and toward each other, they a ternately grip and pull the cable 2O through the machine.

will now describe vthe. mechanism by means of which I able to reverse the ac- Y tion of the machine on the cable, that is, release the pull on the cable 20, step by step, as the main lever 10 is oscillated.

l'eferring to F ig. 5, l have provided tubular members 26 and 27, slidably mounted threugl the right hand ends, respectively,

of the grip boxes 14 and 15, the tubular member 26, werking through Vthe middle connecting member 5, and the tubular member 27, working through the connecting head 4, at the right hand end of the machine. Mounted on said tubular members 26 and 27 are coiled springs, designated, respectively, 28 and V29, which bear at their outer ends, respeetiY-Icly, against the connecting member 5, andthe connecting Vhead their inner ends said springs bear against collars 3G and 31, secured to the tubular members 26 and 27, said collars being provided with handle portions 30 and V31', as clearly shown in Figs. 1 and The right hand ends of the grip boxes 14Y and 15, are pro- .s lli vided on their opposite sides with slots as 32 and When the collars 30 and 31 are in the positions shown in Fig. 1, the handle portions 30 and 81 bear against the outer right hand ends, respectively, or' the grip boxes ifi and 15. rlhis is the position'in which these parts are held for the normal or pulling operation of the machine, as hereinbcfore described and as shown in Fig. 1. These tubular members 2G and 2T, with their springs 28 and 29, perform no function whatever in this position. lhen, however, it is desired to release the pullon the pull cable 20, said tubular members 26 and 27 are turned so that their handle portions 30 and 81 move, respectively, into the slots and 8f3, the inner ends of said tubular members 26 and 27, then being free to be forced against the right hand ends, respectively, of the gripping jaws 21-21 and 22-22, in opposition to the operation or the springs 211 and 25, at the opposite ends oi said gripping jaws. The springs 28 and 29, are stronger than the springs 24 and 25.

n operating the machine to release, step by step, the pull cable 20, referring to Fig. 5, with the lever moved to the right, as shown, the grip box 14, is in holding engagement with the cable, its jaws 21 and 21 being in gripping engagement therewith. The pull on the cable is sufficient to keep said jaws in holding engagement with the cable as the lever 10 is moved to the left, which moves grip box 1% to the right, the cable moving therewith. rhe grip box 15, is sliding over the cable, its gripping jaws being pressed to the left by the spring 29, in opposition to spring 25, which is compressed, as shown. As the gripping box 15,

moves sulliciently to the left so that the tension or the spring 29, and its tubular member 2i' no longer operates against the right liano end oi'l its gripping jaws 22 and 22', said gripping jaws 22 and 22 are then moved to the right by spring 25, ready to grip the cable 2O and take the load. As they take the load it is released suiiiciently from gripping jaws 21 and 21 of grip box 141, which has been moved to the right and compressed spring 28, which spring 28 and its tube 26 now operates against the right hand ends of the gripping jaws 21 and 21 to torce them loose from the cable so that the grip box 14 can slide over the cable as it is moved to the left while the grip box 15 is carrying the cable and its load to the right. As it comes to this position, grip box 14, having now been moved to the left, its gripping jaws 21 and 21 having been moved away from the end of the tubular member 26, are now i'orced into gripping engagement with the pull cable 2O by their spring 24, thus vtaking the load. immediately following this action, spring 29, which has been compressed by the movement of grip box 15 to the right, operatesl to move gripping jaws 22 and 22 to the left, and out of engagement with the pull cable 20, in opposition to spring 25. T ius by turning the collars 30 and 31 so that their handle portions 30 and 31 move into the slots 32 and 33 at the right hand ends oft the boxes 14 and 15, to allow the heavy springs 28 and 29 to function, as ust described, my machine can be used to release, or pay out, step by step, the pull cable with its load thereon.

It will be apparent from the drawings that by changing the positions of the opposite ends of the connecting link, or pitman, 12, to different positions on the operating lever 10, or the vertical lever structure 6, that dilferent speeds in the action of' the gripping boxes 14 and 15 on the pull cable can be had, as well as a change in power.

I am aware that changes can be made in my invention as here illustrated, without departing from the spirit thereof, and I do not, therefore, limit the invention to these details, except as I may be limited by the hereto appended claims.

claim:

1. In a device of the character referred to, in combination, a rigid frame structure having spaced parallel guides thereon, a pair of gripping elements movable thereon, an operating lever pivoted on said rigid frame structure therebetween and connected therewith to move said elements toward and from each other on said frame structure, gripping mechanisms in each of said gripping elements moi/*able toward and from each other, and adapted to grip the opposite sides of a pulling element extending 'from one gripping element to the other, and means for automatically moving said gripping mechanisms into and out of gripping action as said gripping elements are moved in opposite directions on said main frame.

2. In a device of the character referred to, in combination, a rigid frame structure having spaced parallel guides thereon a pair of gripping elements movable thereon, an operating lever pivoted on said rigid frame structure therebetween and connected therewith to move said elements toward and from each other on said frame structure, gripping jaws movably mounted within said gripping elements and movable toward and from each other, operating elements connected with said main gripping elements and with said gripping jaws and adapted to automatically move said gripping jaws toward each other when said gripping elements are moved in one direction and to release said jaws when moved in the opposite direction, substantially as described.

3. In a device of the character referred to, in combination, a rigid 'frame structure havn ing spaced parallel guides thereon, a pair of gripping elements kslidable toward and yfrom each other thereon, ope 'ating levers pivoted to said rigid frame structure for simultaneously moving said elements, a pair of gripping jaws in each of said elements and movable toward and fromV each other and longitudinally within said elements, operating elements pivotally connecting said gripping jaws with said gripping elements, and means normally moving said gripping jaws into gripping positions, substantially as described.

4. In a device of the character referred to,

in combination, a rigid frame structure having spaced parallel guides thereon, a pair of gripping elements slidably mounted thereon and movable toward and vfrom each other, an operating lever therebetween, connected with said main frame and to said gripping elements at its opposite sides, movable gripping mechanisms in each of said gripping elements, the mechanisms Vof each element being movabletoward and from each other into and out of gripping positions, means normally moving said gripping mechanism into gripping positions, and means connecting said gripping mechanisms with said gripping elements, whereby they are automatically operated by the operation of said gripping elements, substantially as de scribed.

5. In a device of the character referred to,

'in combination, a main frame, a pair of gripping elements movably mounted upon said main frame, means for moving said gripping elements in opposite directions thereon, said gripping elements being adapted to automatically grip and move therewith a pulling element extending from one gripping element to the other, and means forl reversing the action of said gripping elements, whereby they may be made to grip onto said pulling element during their movements in either direction desired, and to move freely along on said pulling element when moved in the opposite direction, whereby said device can be operated to move said pulling element step by step in one direction, or it can be set to release said pulling element, step by step, in the opposite direction. Y

. 6. In a device of the. character referred to, in combination, a rigid frame structure having two spaced guide members thereon, a pair of gripping elements movably mounted lthereon and adapted to be moved in oppoyment when said gripping elements are moved in the opposite direction, and compound operating Y levers pivoted on said frame structure with operatingY connections for moving said gripping elements in opposite directions on said main frame, said operating connections being adjustable to vary the speed and power in the operation of said gripping elements by said operating lever.

7. In a device of the character referred to, in combination, a rigid frame structure having two spaced guide members thereon, a pair of gripping elements movably mounted upon said main frame, said gripping elements being provided with oppositely movable jaws for automatically gripping on to a pulling element extending from one gripping element to the other, said means operatingon said pulling element as said gripping elements are moved in one direction, and moving inoperatively along said pulling element as said gripping elements are moved in the opposite direction, an operating lever mounted on said main frame, a vertical lever structure pivotally mounted on said main frame, connecting members from said vertical lever structure to said gripping elements, and a connecting link, or pitman, adjustably connecting, said operating lever with said vertical lever structure, whereby the operation of said operating lever operates said gripping elements in opposite directions on said main frame for moving said pulling element step by step from one gripping element to the other, substantially as described.

8. In a device of the character referred to,

a gripping element comprising a box-like' structure, a pair of gripping jaws mounted to be moved toward and from each other within said box-like structure, a plurality of eccentric segments operating within said box-like structure on said gripping jaws, whereby to force said gripping jaws toward each other when moved in one direction within said box-like structure, a spring within said boX- like structure normally moving said gripping jaws in one direction within said boxlike structure, whereby they are moved toward each other by said eccentric segments and releasable means for moving said jaws in the opposite direction, substantially as described.

9. In a device of the character referred to, a gripping element comprising a box-like structure, a pair of gripping jaws mounted to be moved toward and from each other within saidboX-like structure, a plurality of eccentric segments operating within said box-like structure on said gripping jaws, whereby to force said gripping jaws toward each other when moved in one direction within said box-like structure, a spring normally moving said gripping jaws in one direction within said box-like structure, whereby they are moved toward each other by said eccentric segments, and a second spring adapted to be set to operate on said gripping jaws to move them in the opposite direction against the action oi' said irst mentioned spring, substantially as described.

10. In a device of the character referred to, a gripping element comprising 1a boxlike structure, a pair of gripping jaws mounted to be moved toward and from each other within said box-like structure, a plurality of eccentric segments operating within said box-like structure on said gripping jaws, whereby to force said gripping jaws toward each other when moved in one direction within said box-like structure, said eccentric segments having toothed portions adapted to have intertitting engagement with said jaws, a spring normally moving said gripping jaws in one direction within said box-like structure, whereby they are moved toward each other by said eccentric segments, and releasable means for moving said jaws in the opposite direction, substantially as described.

11. In a device of the character referred to, a gripping element comprising a box-like structure, a pair of gripping aws mounted to be moved toward and from each other within said box-like structure, a plurality ot eccentric segments operating within said boX- like structure on said gripping jaws,whereby to force said gripping aws toward each other when moved in one direction within said boxlike structure, said eccentric segments having toothed portions adapted to have intertting engagement with said jaws, and also having smooth portions having a coperating bearing engagement with said jaws, a spring normally moving said gripping aws within said box-like structure, whereby they are moved toward each other by said eccentric segments, and a releasable spring for moving them in the opposite direction at will, substantially as described.

12. A gripping device comprising a boxlike structure, a pair of gripping jaws therein, a spring operating to move said jaws in one direction in said box-like structure, means operating to move them toward each other they are moved by said spring, and a second spring adapted to be set at will to operate to move said jaws in the opposite direction against the tension ot' said first mentioned spring, substantially as described.

13. A gripping device comprising a boxlike structure, a pair of gripping jaws therein, a spring operating to move said jaws in one direction in said box-like structure, means operating to move them toward each other as they are moved by said spring, a second spring adapted to be set at will to operate to move said jaws in the opposite direction against the tension of said irst men-- tioned spring, and means for moving said jaws away from each other as they are moved by said second spring, substantially as described.

Signed at Portland, Multnomah county,

In the presence of- I. M. GRIFFIN, J. C. STRENG.

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