US1177767A - Hoisting and pulling mechanism. - Google Patents

Description

R. N. EGGLESTON.

HolsTlNG AND PULLING MECHANISM.

APPLICATION FILED MAY 29, |914.

R. N. EGGLESTON.

HOISTING AND PULLING MECHANISM.

APPLxcATmN FILED MAY 29.1914.

1,177,767. Patented Apr. 4,1916.

2 SHEETS-SHEET 2.

,UNITED STATES OFFICE.

ROBERT N. 'EGGLESTON, OF MUSKOGEE, OKLAHOMA, ASSIGNOR TO PULL-U-OUT MANU- FACTUBING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION 0F MISSOURI.

HOISTING AND PULLING- MECHANISM.

Specification of Letters Patent.

Patented Apr. 4,1971 6.

Application med may 29, 1914. serial No. 841,900.

To all whom it may concern.'

Be it known that I, ROBERT N. EGGLns'roN, citizen of the United States, residingat Muskogee, in the county of Muskogee and State of Oklahoma, have invented certain new and useful Improvements in Hoisting and Pulling Mechanism, of which the following is a specification.

This invention relates to hoisting and pulling mechanisms, and has for its main object to provide a small, light-weight, manually-operable mechanism that can be used succefullv for lifting great weights or eX- erting a strong pull on a device which it is desired to move.

Another object is to provide a hoisting and pulling mechanism that comprises a block and tackle and manually-operable winding device or windlass combined as a single unit and constructed in such a manner that the complete mechanism can be carried in the tool boX or other small compartment of an automobile when it is not in use.

Other objects and desirable features of my invention will be hereinafter pointed out.

In the drawings: Figure 1 is a perspective view of my invention employed in extracting a self-propelled vehicle from a mudhole; Fig. 2 is a top plan view of the windlass mechanism; Fig. 3 is a perspective view of the entire device folded to its most compact form for shipment or storage; Fig. 4 is a fragmentary sectional view taken on the line 4 4 of Fig. 2; Fig. 5 is a fragmentary sectional view taken on the line 5-5 of Fig. 4; Fig. 6 is a fragmentary perspective view of the pawl and ratchet mechanism employed `in connection with the operating lever showing the parts disassembled.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

-My improved device consists principally of a new and improved type of manually operable windlass or cable winding apparatus, indicated as a Whole by the numeral l0. This windlass includes a frame comprising spaced side members 11 and 12, preferably in the form of metal straps provided along their outer faces with longitudinally extending reinforcing ribs 13, in order to insure the maximum strength with the least weight and having their end portions bent toward each other and secured by bolts 14 and nuts 15.

As best shown in Fig. 2, it will be seen thatthe straps 11 and 12 have their end portions thickened to form reinforcingl heads to receive the .securing bolts 14 and that the end portions at one end of the frame which they form, extend for a considerable distance in parallel spaced relation to each other. These straps are provided intermediate their length with lateral projections or guard arms 16, the free ends of which are directed inwardly to overlap each other, being mortised as shown at 17 for close interlocking engagement, a screw 18 or other fastening device being threaded through their overlapping ends to secure them together. These guard arms 16 form a yoke-shaped device that serves not only as guard, but also as a brace for the inner portions of the side members of the frame. An idler pullev 1 9, peripherally grooved to receive a cable, is journaled upon a shaft 20 mounted in bearings 21 formed adjacent the 'forward end of the frame 10.

The side members of the frame, adjacent the guard arms 16, are thickened eXteriorly to provide bearings 22 for a shaft 23 upon which is journaled the winding drum of the windlass, indicated as a whole by the numeral 24. This winding drum, as best shown in Figs. 4 and 5 of the drawings; is cast or otherwise formed in a single piece of metal, one side face being formed with an annular recess or chamber providing a central hub portion 25 and peripheral cable receiving portion 26 connected to the hub by the bodv plate 27. The peripheral portion 26 of the winding drum is provided at its edges with outwardly directed cable retaining flanges 28 and interiorly with teeth 29 forming in effect an internal gear.

The side member 11 of the frame is thickened interio-rly to provide a bearing 30 in which is journaled a shaft 31, the inner end of which carries a pinion 32 meshing with the internal gear 29. A crank handle or operating lever, indicated as a whole by the numeral 33 is mounted to turn freely upon the shaft 31 and is held against disengagement therefrom by a ratchet wheel 34- pinned or otherwise secured against longitudinal movement from the squared outer end of the shaft 31. The crank handle v3,3 includes a body portion 35 and handle 4 ortion 36, the body portion at its free end ing constructed in the form of a sleeve 37 through which the shank or body portion of the handle member 36 passes, this handle member being provided at its free end with the crank handle is provided with a medial, Y longitudinally extending reinforcing shouldei` 40 and such Vcrank handle member, adjacentthat end engaging about the shaft 31, is olf-set inwardly providing an exterior .shoulder 41 in which. is formed a longitudinal socket 42. The stem or shank portion 43 of a reversible locking pawl 44. extends in this socket and is normally held in outermost position by a helical spring 45 seated in the socket. This stem 43 of the pawl has an enlarged laterally directed head 46 forming a linger' piece by means of which the pawl may be manually retracted and its position reversed, as will be later explained,

and this extension, at a point substantiallyv 1n alinement with the stem or shank of the pawl, is provided with a transverse pawl shoulder 47 having one vertical and one inclined face, as clearly shown in Fig. 6 of the drawings. The pawl stem at that side diametrically opposite the extension 46, is provided with a radially extending locking pin 48 adapted, under certain circumstances, v

to be swung to seat in a transverse groove 49 formed in the outer Vface of the body portion-of the crank handle.

In addition to the above described pawl, controlling the rotation of the shaft 31 upon turning of the crank handle, I provide a second pawl, indicated as a whole by the numeral 50 which engages directly with the teeth of the pinion 32 when in active posi- A tion. This pawl is pivoted intermediate its length upon a pivot pin 51 passed'through the upward extension or guard arm 16 of the iframeA member 11, immediately above such frame member and has one end offset inwardly, as shown in dotted lines in Fig. 5 to `extend into the plane of the'pinion and then curved downwardly to form a pinion tooth engaging terminal 52. The opposite end of the pawl is provided with an outwardly directed-extension or finger -piece 53 by means ofwhich the pawl Amay be swung into or out of engagement with the pinion. The pawl is provided, substantially concentrically with respect to its pivot 51, with an arcuate shoulder 54 notched as shown at 55 to receive the rebent terminal of a leaf locking spring 56 when the pawl is in inactive position, as shown in Fig. 4.

vWhen the pawl is swung to active position;

ther terminal 56 rides out of this notch to engage against the rear face of'the shoulder and hold the'pawl in engagement with the pinion. This leaf spring' is secured'at its opposite end to a stud 57 extending inwardly from the saine guard arm supporting 4the pawl 50, by a screw or otherfastening device 58. The active terminal o-r pinion engaging end of the pawl is so shaped that when the pawl is in active position, it will permit'- about the drum, when the device is not in l use, and the other end is passed about one of the pulleys 60.0f a double pulley block 61, back about the idler pulley'19, from l there about the other pulley 62 of the pulley bloc-k and is .then secured by any suitable form of clamp 63 to the adjacent end of the frame of the windlass.

' In addition to the above described windlass structure, my complete mechanism, when used for extracting vehicles from mudholes, includes a chain or cable 64v provided at its ends with hooks 65, a second chain or cable 66 provided at one end with a hook 67, and one or more land anchors 68. These land anchors are each preferably formed from a single piece of' metal including a body portion terminating at o-ne end in a widened piercing point 69 and at its opposite end in a widened head 70 having a claw 71 between the fingers of which a chain link may be positioned; I

ln employing the above described device to draw a vehicle out of a mud-hole or sand pit, the operator first drives one or more of the land anchors or stakes into the earth as One of the hooksf65 of the chain 64 is then engaged in the rear end of the frame of the windlass device 10, as shown in the draw-V ings, and its opposite end secured to the ve hicle in any suitable manner, a simple way being to pass it about the forward axle 7 2 of the vehicle and secure it by engaging the other hook 65 through one of the chain links. The locking pawl 50 is then swung-out of engagement with the pinion 32 and the hand crank locking pawl 44 moved to inoperative position by forcing its stem into the socket 42 until the pin 48 is opposite the slot- 49 and then swinging the pawl to seat the pin in the slot. In this position. the ratchet wheel engaging shoulder 4T of the pawl is held in spaced relation to thev ratchet wheel, under which circumstances, the cable drum is free to turn without hindrance and without movement of the crank handle. is then unwound from the drum by pulling upon the block and tackle 61, after which the hook 67 of the chain 66 is inserted through the eye of the block and tackle and the chain secured between the claws of the land anchors in the manner shown in Fig. 1. The set bolt 39 is loosened to permit withdrawal of the portion 39 of the crank handle from the sleeve 37, such portion at this time being so mounted in the sleeve that the hand grip 38 is directed inwardly toward the windlass frame, as shown in Fig. 3. The hand crank portion 36 is then inserted in the manner formed, the pawl 50 is thrown into active position and the pawl 44 released by swinging the pin 48 out of the slot 49. This latter pawl is then turned to s uch a position that it will lock the shaft 31 against such movement as would permit unwinding of the cable 59 from the winding drum and the cable is wound upon the drum by turning the hand crank 33. This winding of the cable upon the windlass, which is anchored by means of the land anchors, results in drawing the vehicle toward the land anchors, and consequently out of the mud-hole or sand pit. Because of the employment of the pinion 32 with the internal gear 29. great leverage is obtained and but little effort is required to extract the vehicle, irrespective of how badly mired it may be. This leverage isstill further increased of course by the manner in which the cable is trained about the pulleys of the block and tackle, thewinding drum and the pulley 19 of the Windlass.

After the vehicle has been drawn out of difliculty, the chains 66 and 64 are disconnected from the windlass and fr om the land anchors and vehicle axle, respectively, and the land anchors drawn from the ground. The hand crank is then turned to wind up any remaining slack cable, bringing the block and tackle 61 into direct engagement with the winding drum, as best shown in Fig. 3 of the drawings, after which the handle carrying portion of the hand crank is again freed from the sleeve and replaced in reverse position in order that the crank may The cable be swung to the position shown in Fig. 3 with the handle proper extending transversely of the windlass frame and thereby occupying practically no space.

It might be well to state at this point that, in case it becomes difiicult to draw the cable from the winding drum merely by pulling upon the block and tackle, the pa'wl 44 may be swung to reverse position to that which it occupies when winding the cable and with the pawl 50 released, the hand crank may be turned to rotate the drum and facilitate the unwinding of the cable therefrom. The intermediate portion of the slot 49 ispreferably notched as shown at 73 to provide a seat for the pin 48 to prevent casual disengagement of the pawl 44 when the latter is locked in inactive position.

From the foregoing description, it will be apparent that I have provided a simply constructed device which is strong, readily operated and durable and which, above all. when folded to the position shown in Fig. 3 of the drawings, is extremely compact, occupyingA but little more space in the tool box of the vehicle than would a coil of wire cable of the length contained upon the drum if wound by hand, this being due to the fact that it is almost impossible to tightly wind such cable, save by the use of considerable force in connection with a winding drum.

Stakes or land anchors of the type disclosed, when applied in the .manner illustrated `in Fig. 1 of the drawings, offer remarkable resistance to their withdrawal, when in use, due to the fact that being driven into the ground until their claws are substantially flush with the surface, the enlarged heads in effect form fulcrums about which their lower ends must swing beforethey can be drawn out by strain applied in any direction other than the direction of their length. For this reason, comparatively small land anchors, not over 10 and 12 inches in length, are found to be sufficient.

Although I have described the windlass structure in connection with land anchors and chains for extracting vehicles from mud-holes and other like diiiculties. it will of course be understood that I do not wish to limit it to such use as it may be employed for hoisting purposes,"wire stretching, or in fact for any purpose for which it may prove to be adapted, without in the slightest degree departing from the spirit of my invention. Furthermore, while I have herein illustrated and described a land anchor of novel construction and also a novel method of anchoring a pulling device to the ground, I make no claim in this application to either of the above features, as they form the subject-matter of my pending application Serial No. 841,899, filed May 29, 1914. Furthermore, the chains 64 and 66 may be l or sho the invention, what which one end of a'block and tackle can beconnected, a hollow drum rotatably mounted on said frame between the 'side members thereof and provided with an internalgear,

- said drum being arranged in longitudinal alinement with said pulley, a shaft on said frame provided with a pinion that meshes with said internal gear, and an'operating mechanism for said shaft comprising a manually-operable levelthat can be arranged in parallel relation with'the side members of said frame when the mechanism is'not in use.

2. A hoisting and pulling mechanism, comprising a frame Aprovided with spaced side members, a yoke-shaped device arranged at right vangles to said side members and acting to reinforce and strengthen the intermediate portions of same, a hollow ldrum rotatably mounted on said side members and arranged between the side said portions of said yoke-shaped device, an Vinternal gear on 'said drum, a pinion carrled l by saidframe and meshing with said gear,

a manually-operable actuating means for p1n1on, means at one end of said frame to which a block and tackle can be connect- Y ed, andpmeans at the opposite end of said framel to which a stay or securing device can be connected.

3. A windlass mechanism :including spaced frame forming straps having their end portions oi'set toward each other to extend in parallel spaced relation, means connecting such end portions including a pulley rotatably mounted between adjacent end portions, upwardly directed guard arms carried 4 one by each strap and having inwardly directed over-lapping terminals connected to each other, a shaft mountedv in the strap members adjacent their juncture with the guard arms, a cable receiving Winding drum mounted upon the shaft, whereby the guard arms guide the cable during its winding upon or unwinding from the drum, and

means for rotating the drum.

In testimony whereof I aiiix my signature in presence of two witnesses.

ROBERT N. EGGLESTON.

Witnesses:

J. K. MOORE, SAMUEL N. ACKER.

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