US1341957A - Hoist - Google Patents

Description

E. C. WILSON.

HOIST.

APPLICATION FILED MAY 2, 19m.

Patented. June 1, 1920c INVENTUR;

PATT QFECE.

ELIHU WILSON, 015 LOS ANGELES, CALIFORNIA.

Specification of Letters Patent Patented we 1, 1920.

Application filed May 2, 1914. Serial No. 835,924.

To all whom it may concern:

Be it known that I, ELIHU C. WILSON, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Hoists, of which the following is a specification.

This invention relates to hoists, of various types and classes, wherein a hoist body or mechanism or" device is supported by suitable means of suspension, being applied directly or indirectly to the work or object to be elevated, such, for instance, as

well casing, and objects and loads to be elevated and lowered in pits, shafts, and wells, and from points of elevation, such as the various floors of buildingsiundergoing construction. The invention has for its object to provide means or devices whereby the suspension means are detachably connected with the body or main portion of the hoist, such means or devices effectively maintaining the connection between the suspension means and the other features of the hoist, but permitting separation, or detachment of the suspension means from such body or other parts of the hoist.

More particularly, the invention has for its object the provision of such means or devices which will act solely in the retaining ofiice, the Weight of the hoist body or other features being directly imparted to the means of suspension, so that the retaining means are not subjected to the working load and may therefore be readily attached, or re-applied, or manipulated for disconnection of the means of suspension from the main hoist features. Such arrangement and operative inter-relation obviates the necessity of providing such retaining means of that mass or strength which would be necessary if the working strain were imparted to or through the retaining devices.

Specifically, in the following specification and in the accompanying drawing, the retaining means or attaching means or devices are shown as associated with the clamping or holding means of a well elevator, or device for raising and lowering well casing. The present invention, sospecifically disclosed, was originally disclosed and claimed in'an application filed by, me for 'United States Letters Patent for wellele vators, under dateof January 2, 1909, having Serial Number 470,536, and in which the present invention as hereinafter dis closed was specifically disclosed as associated with such holding means of a well elevator and the suspension members, or bails or links constituting suspension means. It will, however, be understood, that the present invention relates generally to hoists, a few types of which are hereinabove re ferred to, without any specific limitation to the specific form of hoist or well elevator hereinafter disclosed and described.

.The invention has for its object to providean improved hoist embodying the fea tures above pointed out, and others, which will be generally superior in point of relat1ve simplicity and inexpensiveness of construction, facility in application and in detachment, durability, length of life and compactness in form, and which will be generally superior in efliciency and serviceability and convenience in use.

With the above and other objects in view, the invention consists in the novel provision, construction, formation, combination, association and relative arrangement of parts, members and features, all as hereinafter described, shown in the drawing, and finally pointed out in claims,

In the drawing Figure 1 is a side elevation of a casing elevator embodying the invention, a portion of a casing being shown as connected therewith prior to its insertion to or removal from a well; and the elevator being shown in working connection with hoisting means;

Fig. 2 is a perspective view of the essential featuresof the invention, being a reproduction of a portion of the showing of Fig. 1 upon an enlarged scale; and,

Fig. 3 is an isometric view of essential features of the same, the latter being shown in disassembled relations.

Corresponding parts in all the figures are denoted by the same reference characters.

Referring with particularity to the drawing, the improved elevator comprises, broadly, clamping and holding means A and suspension means B therefor; the latter serving to support the former in connection with hoistingmeans C which latter are not concerned in the issues of the invention and may be of any preferred and suitable type.

The invention is embodied in the formation,

holding means and the suspension means,

the former comprising two clamping and holding members a and b, respectively, and

the latter comprising two suspension members c and d, respectively. The clamping and holding member a may be designated the working body of the means A, and the member Z) may be designated the confining body of the means A; the parts and features hereinafter described and shown in the 'drawing being auxiliary to the membersa and b and the suspension members 0 and d,

all of the same cooperating and being interrelated to the ends of stress-resistance, rigidity and working efficiency and positiveness and conven1ence.. a

The bodies a and bare detachably unitedby connection means 6 which permit relative movement of the same; securing means f being rovided for maintaining the members a and b in predetermined relative posi tions with relation to the load 9; as, for engaging and sustaining the load. The suspension members 0 and d are connected directly with the member a, the weight of the load being imposed upon said suspension members directly through the agency of said member a. h and is designate confining members positioned with respect, to the suspension members 0 and d, and whereby the latter members are maintained in operative connectlon wlth the member a sa1d confin- 'ing members it and is being detachable from the member a. A particular formation, construction and association of parts, members and features embodying the invention is as follows:

The member a comprises a substantially central bowed or curved portion 4 provided with opposite end extensions 5 and 6, respectively; and the member 6 consists of a bowed -or curved portion 7 complementary to the bowed or curved portion 4 .of the member a;

whereby a substantially circular passage 8' is formed vertically, transversely of the clamping and holding means A, and designed for the reception of the load 9. The material of which the portion 7 is composed may be thinner or of less mass than that of which the portion 4 is composed, the portion 4 supporting the major portion of the load. The connection means e are applied to being morethan semi-circular, the portion 7 being consequently less than sem1-circular;' and of a semi-clrcular formatlon. so constituted, the common plane within which the extensions 5 and 6 he coincides substantially with the plane of a diameter of the circular passage 8. The connection means e and se curing means 7 are arranged at one side of the plane last referred to and in a plane coincident with the chord of an are less than a semi-circle in extension. I

The connection means 6 comprises two lugs 9 and 10, respectively, projecting from the body a substantially at the line of junction of the extension 6 and the central por tion 4; combined with a lug 11 formed at one end of the curved portion 7 of the member b; and a headed pin or pintle 12 passing through holes or openings 18 and 14, respectively, in thelugs 9 and 10 and a registering hole or opening 15 in the lug 11. The securing means f comprises two lugs 16 and ,17, respectively,projecting from the opposite end of the curved portion 7; in combination with an outwardly projecting hookshaped lug 18 formed upon or connected with the body a and projecting therefrom substantially at the line of junction between V the central curved portion 4 and theextension 5, together with a key or wedge 19 adapted to be passed between the lugs 16 and 17 and the lug 18; said key or wedge preferably having an angular extension 20 between which and the outer surface of the curved portion 7 extends a chain 21 or other suitable attaching means. The lug 18 is so 'arranged with respect to the lugs 16 and 17 that the key or wedge 19 bears against the lug 16 above and against the lug 17 below said lug 18, firmly holding the members a and 3) against opening, and effectually opposing and neutralizing substantially from top to bottom of the membersa and 7),

member 6.

The holding meansl comprise abutments 22 and 23, respectively formed upon or connected with the member-a inward of the plane of the lug '18, and arranged substantially in the line of junction of the portion 4 and extension 5 of the bodya; in combination with the lugs 16 and 17 which are ar ranged for imposition respectively upon the lugs 22 and 23 when the members a and b are in relative positions permitting operation of the securing means i by the insertion of the key orwedge 19 between the lug 18 and the lugs 16 and 17; and said holding means Z further include a member 0 consistingof an angular recess in the bowed or curved per tion 7 of the member 5, adjacent to the lug flush with the lower portion of the lug 17 and is adapted to fit upon the abutment 23.

The suspension members 0 and d comprise each a closed link 24, preferably metallic, the lower end portions 25 of which are designed for engagement with the extensions 5 and 6 of the body a, and the upper end portions 26 of which are designed and adapted for engagement by the hoisting means C or a hook 27 included therein. The links 24 are preferably laterally bent so that their upper end portions 26 mutually approach or converge, arching in totality above the members a and b. Each of the links 24 is engaged with one of the extensions 5 and 6 by passing the same-through a longitudinal slot 28 formed therein into a curved seat 29 constituting the inner termination of such slot, each of the end extensions 5 and 6 being in this manner bifurcated as shown clearly in Fig. 3.

The confining members 71. and k, respec tively, close the slots 28, when in operative positions, and complete substantially circular formations of the seats 29. Each of said members it and It comprises a block 30 fitting between the two. portions of the bifurcated structure of each of the-respective extensions 5 and 6. It will be noted that the slot between the arms of each wing extends inwardly substantially horizontally and then somewhat upwardly to form an upwardly extending notch, 'above referred to as the seat 29, in the upper arms. In this notch the link may pull and is prevented from swinging laterally against theretaining blocks 30 which, it will be observed,'are located lower than the notches or seats 29 so that the links will not be pressed against the blocks by upward pull. The blocks 30 are held in operative positions by securing devices such as headed bolts 31, each of which passes through holes or openings 32 and 33, respectively, in the respective bifurcated extensions 5 and 6 and likewise through a registering hole or opening 34 in the respective block 30. A suitable nut 35 is applied to each bolt 31.

The upper surfaces of the vmembers a and b, or at least of the curved or bowed portions 4 and 7 of the same, are preferably plane and smooth and adapted for the reception of the collar 36 of the casing 37 constituting the load 9, or for the reception of any substituted part in adaptation of the elevator to other work than that specifically illustrated.

The operation, method of use and advantages of the improved well elevator constituting the invention, will be understood from the foregoing description, taken in connection with the accompanying drawing and the follow ng statement:

WVith the parts in the relative positions shown in Figs. 1 and 2 ofthe drawing and ready for the reception of the load, such as the well casing 37, the members a and b are relatively moved upon the connection means 6, which act as a hinge, the securing means f being first manipulated to that end by the withdrawal of the key or wedge 19 from its position among the lugs 16 and 17 and the abutment 22 and the lug 18. The curved portion 4 of the member a is then passed into engagement with the load and beneath the collar 36 of the casing 37, and the collar 36 is brought to bear firmly upon the upper surface of the curved portion 4. The member b is then swung against the member a, upon the connection means 6, the upper surface of the curved portion 7 passing under the collar 36;and the key or wedge 19 is passed between the lugs 16 and 17 and the lug 18, firmly holding the members a and b in operative positions. The collar 36 is not firmly set upon the member a in practice, until the member I) is manipulated as last described; and thereupon the collar 36 is imposed upon the members a and b at the upper surfaces of the portions 4 and 7 thereof.

'All the weight of the loadis transmitted of the recess constituting the holding means member 0, of the secondary holding means 1. Asingle rigid structure, namely the body a, thus transmits the weight of the load directly to the suspension means B, and the tendency of the two members of the clamping and holding means A to buckle under the weight of the load, as in other similar devices and mechanism, is obviated. Perfect alinement and working conditions respecting and affecting the two members a and Z) are maintained, due to rigidity of the member a and the transmission of all lead weight imposed upon the member I) to the member a and thence to the suspension means B. It results. that the efliciency and operativeness of the connection means 6 and the securing means 7' are not diminishedor- 'their proper functions.

The obviation of any possibility of spring or play of the clamping and holding means I A prevents the impingement of the clampbody a of the 'means A, whatever such means. maybe, in the adaptation of the invention to. j 40 ing members a and 6 upon the casing with consequentinjury to and weakening of the latter. Furthermore, the load can in no Way foul the securing means 7 so as to cause the inadvertent manipulation of the same during operation. v

The connection of the suspension means B with but one of the clamping members,

namely, a, and independently of the connection means 6 and the securing means f, permits of connection of the load with, and disconnection of the load from the clamping and holding means A while the suspension means are in operative position. Furthermore, due to the relative arrangement of parts described, the securing means f may be manipulated to free the member 6, while the collar 36 of the casing is resting upon the upper surface of the member a, obviating the necessity of lowering the elevator so weight of the load is imparted to or through the confining members h and it, nor the bolts 31 which retain the same in place. Such confining members or blocks 30 may thus ,be

readily slipped into or out of place, to free the suspension means or links 24 from the various forms of hoists. It also follows that said blocks 30 and bolts 31 are not subjected to any strains or stresses which would tend 'to distort or mis-shape them, resulting in their becoming jammed in their working positions. They may at all times be readily removed and restored to working positions, all of the load of the hoist being directly frlansmitted to" the bails or links 24 or the 1 e.

I do not desire that the invention be limited to the specific provision, construction, formation and association of parts, members and features shown and described; but reserve the right to vary the same in adapting the improvements to varying conditions of use without departing from the spirit of the invention. I

Having thus disclosed In invention, I claim and desire to secure by etters Patent:

1. A casing elevator including a body and a complemental jaw mounted on the body for cooperation therewith to embrace a casing, said body being provided with laterally projecting wings which are bifurcated substantially horizontally, closed suspension links fitted removably'in the bifurcations of the Wings so as to be supported by the lower arms of the bifurcations when inoperative and pull against the upper arms when operative, and retaining means for holding the links removably in position within the bifurcations.

2. A casing elevator including parts forming a substantially annular casing encircling and engaging structure,- said structurebei'ng provided with laterally projecting wings which are bifurcated substantially horizontally, suspension links fitted removably in the bifurcations of the wings so as to be supported by the lower arms of the bifurcations when inoperative and pull against the upper arms when operative, and retaining -means for holding the links removably in position within the bifurcations.

3. A casingelevator including parts forming a substantially annular casing encircling and engaging structure, said structure being provided with laterally projecting wings,

which are bifurcated substantially horizontally, suspension links fitted removably in the bifurcations of the wings soas to be supported by the lower arms of the bifurcations when inoperative and pull against the upper arms when operative; the space between the bifurcations extending inwardly substantially horizontally and then somewhat upwardly to. make an upwardly extending notch in the upper arm in 'which .the link may pull; and retaining means between the arms for holding the links removably in position. a

4. A casing elevator including parts forming a substantially annular casing encircling and engaging structure,'said structure being provided with laterally projecting wings which are'bifurcated substantially horizontally, suspension links fitted removably in the bifurcations of'the wings so as to be supported by the lower arms of the bifurcations when inoperative and pull against the-upper arms when operative; the space between the bifurcations extending inwardly substantially horizontally and then somewhat upwardly to make an upwardly extending notch in the upper arm in which the link may pull; and a retaining block'filling the space between the ends of, the arms and being located lower than the upwardly extending notch so that the links will not be pressed against the blocks by upward pull.

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

ELIHU o. WILSoN.

Witnesses:

RAYMOND I. BLAKEsLE'E, I. BENJAMIN.

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