US1689259A - Portable load carrying and hoisting machine - Google Patents

Description

Qct. 30, 1928; 1,689,259

- F. J. SHEPARD, JR., ET AL PORTABLE LOAD CARRYING AND HOISTING MACHINE Filed May 3, 1926 4 Sheets- Sheet 1 lnvenToT-s. Frederick J. Shepard J1. Ncnhaniel Worshcnw Oct. 30, 1928. 1,689,259

' F. J. SHEPARD, JR., ET A;

PORTABLE LOAD CARRYING AND HQISTING MACHINE Filed May 3. 1926 4 Sheets-Sheet 2 lnvenTors.

f Frederick J.ShepardJr.

Nathaniel Warshuw Oct. 30, 1928. 1,689,259

F. J. SHEPARD, JR-., El AL PORTABLE LOAD-CARRYING AND HOISTING MACHINE Filed Maya, 1926 4 Sheets-Sheet 3 Fig.3. 22 55 lnvenTo'rs. J I Frederick U.Shepord Jr.

' NclThun'iel Warshaw Oct. 30, 1928. 1,689,259

' F. J. SHEPARD, JR., ET A1.

PORTABLE LOAD CARRYING AND HOISTING MACHINE Filed May 5, 1926 4Sheets-Sheet 4 Fig.6. 88 97 89 37 as Q 9a 1 96 9 1 '6 1 w--. I, l*: 93 Q 94 1 E as ass Z 5 lnvenTors. Frederick Lishepard d1". Nafhoniel Wurshaw b iuw WIIW Patented Get. 30, 1928.

onrrso STATES PATENT OFF-ICE.

FREDERICK J. SHEPARD, m, or AUBURNDALE, .ANn NATHANIEL WARSHAW, or

BOSTON, MASSACHUSETTS, AsSIoNonS TO LEWIS-SHEPARD COMPANY, or WATER- TOWN, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS.

PORTABLE LOAD CARRYING AND HOISTING MACHINE.

"Application filed May 3,

This invention relates'to improvements in hoisting machines and particularly to port.- able machines in which the load is carried upon the vertically movable load support ng means such as a platform, and the general object of the invention is to provide a Simplilied and more rigid construction than has heretofore been produced.

One of the features of the invention consists in providing a more rigid base frame comprising side girders formed of reversely disposed channel bars and having inter-engaging thing-cs connected together preferably by welding at suitable intervals with suitzble transv *rse girders connecting the side girders.

'lhis feature of the invention is illustrated herein as applied to hoisting machine in which means are provided for raising the platforn'i to a suitable height for the purpose of steel-ling or tiering the articles upon each other. The base frame construction above described, however, is equally applicable to elevating trucks in which the platform has a relatively small vertical movement.

A further object of the invention is to pro vide a ticring machine structure in which the standards which form guides for the vertically movable load supporting means are more rigidly connected to the base frame.

llierinsr machinee'; of this type'are usually operated by a winch having a cable running over a suitable sheave at the top of the vertical standards and connected to the vertically mova ble load supporting means.

'llhe winch mechanism of such machines mav be eith r hand operated or power driven in hircord=i1i ze with the character of loads which are to be elevated.

A further object of the invention is to provide a tiering machine construction with a siqiiplemcntal frame carrying the winch and its operating mechanism which is detachably A to the frame and standards so that the .4 nine and standards may be used with differ at winch mechanisms by merely removin the winch-supporting supplemental frame and substituting another.

A. further object of the invention is to provide a connection between the supplemental frame and the base frame of the Standards of such a character that the flexure of the vertical standards which necessarily occurs,

l msm.

A furtherobiect of the invention is to provide a novel movable load supporting means of a more rigid type than heretofore employed and one which can be readily assembled.

Another object ofthe invention is to provide novel antifriction mechanism for guiding the load Supporting means along vertical standards and in which antifriction rollers will engage the inner and outer walls of the rear flange of the channel bars forn'iing the vertical standards.

A. further object of the invention is to provide a novel and simplified support for the shafts of the antifriction rollers which guide the load supporting means along the standards.

A further object of the invention is to provide a novel means for securing the ends of the cable to the load supporting means.

Another feature of the invention consists in providing a more rigid support for the shafts of the rolls which support the rear cnds of the base frame. I

Other objects of the invention and details thereof will more fully appear from the fol lowing description and the accompanying drawings, and will be particularly pointed out in the claims.

In the drawings: V

Fig. 1 is'a side elevation of a hoisting or tiering machine embodying the invention in which the supplemental frame contains a hand operated winch mechanism;

Fig. Q'is a similar view of a hoisting or tiering machine in which the supplemental frame carries-the power operating winch mechanism, the upper portion of the standard being broken away and omitted;

Fig. 3 is a front elevation of the base frame, vertical standards, and the supplemental frame which carries the winch mechanism from which the winch mechanism has been omitted; I

Fig. 4 is a detail plan View showing the plate connecting the upper rear end the supplemental frame to the standard-connecting-girder and illustrating also the manner in wh ch the lower end of the supplen'iental frame is connected to the transverse girder of the ha e frame;

Fig. 5 is a detail sectional view illustrat ing the manner in which the shaft for the rear wheels of the base frame is mounted in the box-like s ide girders of the base frame;

Fi (5 is a detail plan view of the vertically movable load supporting means showing the vertical channel bar standards in section and illustrating the platform of the load supporting means in dotted lines;

Fig. 7 is a detail view of the load supporting means alone viewed from the front tmvardthe rear;

Fig. 8 a detail vertical sectional view through one of the box-like side girders of the base frame on the line 88, Fig. 1;

9 isa detail sectional view showing the anchorage for the end of the cable through the load supporting n'ieans.

The hoisting machines as illustrated in 1 and 2 comprise the same base frame, standards and vertically movable load supporting means and differ from each other in that the winch mechanism for raising and lowerii'ig the load supporting means shown in Fig. 1 is of a hand operated type while that illustrated in Fig. 2 is of a power operated type, the supplemental frames which contain and support the winch mechanism being detachable and interchangeable.

This is an important feature of the present invention.

The base frame of the machine comprises a pair of side girders 1 and 2, each of which is formed of two oppositely disposed. channel bars having inter-engaging flanges, the channel bars being secured together preferably by welding at intervals throughout the length. Other means of securing the channel bars together may, however, be employed. Preferably the side girders comprise an outer channel bar 8 and an inner channel bar 1, the inner channel bar being of less width than the outer channel bar so that its flanges it tightly within the flanges of the outer channel bar to form a box-like construction. These channel bars are secured together by welding along the inner edges of the outer channels.

The base frame is provided at its rear end with rear wheels. In the preferred construction a shaft 5 extends through aligned apertures in the walls of the channels 3. at forming the side girders and is secured against rotation-by one or more cotter pins 6 which ex tend through the shaft 5 with pins or rivets 7 passing through the eyes of the cotter pins and driven into suitable apertures in the web of the channel 4. The shaft 5 extends beyond the outer channel 3 of each side girder to provide axles for the wheels 8 and the wheels desirably are provided with rotary bearings 9, such as Timken, of the usual type. By

reason of this construction the shafts for the rear wheels are more rigidly supported in proximity to the wheels than in other constructions and flexure and breakage of the shaft thereby prevented.

The rear ends of the side girders desirably are connected together by an angle bar 10 which is welded at its ends to the inner faces of the side barsl and2 at the lower end thereof. The front ends of the side girders are connected together by an angle bar 12 which fits around the upper ends of the side girders and is welded thereto along the contacting exposed edges and walls of the angle bar and girder. frame desirably is supported upon legs 13 and 1 1 of angle iron which are welded to the outer faces of the side girders and normally rest upon the floor.

Vertical standards 15 and 16, forming guides for the vertically movable load supporting means are rigidly secured to the side girders of the base frame at a distance from the front end thereof and desirable strength ening members are provided to increase the rigidity of the connection therebctween.

In the preferred construction illustrated gusset plates 17 and 18 of general triangula form are welded to the inner faces of the side girders and extend from near the front end thereof approximately to the rear edge of the vertical standards. The webs of. the vertical standard channel bars 15 and 16 are in turn welded to the gusset plates 17 and 18 respectively, or may be both secured thereto by rivets and by welding to provide a very rigid connection. The lower ends of the vertical standards 15 and 16 desirably are connected together by an angle bar 21 which further serves to strengthen the base frame.

A standard-connectinggirder 22 located at a distance from the base frame, which desirably is welded at its ends to the vertical webs of the channels forming the standard. strengthens the stam'lards and also serves as a means for attachment of the supplemental frame which carries the winch mechanism, as. will hereinafter more fully appear.

The vertical standards desirably are formed in sections whiclu as llltlStlli'Otl herein, are hinged together, the upper section being provided with a sheave 19 over which a suitable cable 20 passes, one end of the cable being connected to the vertically movable load supporting means and the other end of the cable to the winch.

The winch mechanism illustrated in Fig. 1 comprises a winding drum 23 having a gear 24: secured thereto andbeing mounted in suitable bearings in brackets secured to the inner walls of the vertical channel bars 26 and 27 of the supplemental frame. The lower ends of the verti al channel bars 26, 27 are connected together by a girder preferably comprising bars 28 and 29 which are The front end of the base respectively welded to the flanges of the channel bars, the lower flanges of the angle bars being detachably secured by bolts 30 to the transverse angle bar girder which connects the front ends of the side girders of the base frame. The upper ends of the vertical ch annel bars of the supplemental frame are connected together by a plate 31 which desirably is secured to the vertical channel bar 26 by an angle plate 32 which is welded to the web of the vertical channel bar and to the top plate 31. The opposite end of the plate 81 is welded to the upper end of the standard 27. A supplemental wider plate see Fig. 4, is welded to the top'platc 31 and is provided with holes 84 near its edges to receive bolts which are detachably secured to the standard-connecting-girder 22. By reason of this construction it will be noted that the supplemental frame for the winding mechanism is secured at its upper rear corner to the central portion of the scandard-coimectinggirder 22 and is secured at its base to the central portion of the transverse angle iron girder 12 of the base frame thus forming a two-point support. The rear lower corner of the supplemental frame does not rest upon the angle bar 21 which connects the side girders of the base frame but is spaced apart sufficiently therefrom so that the supplemental frame may be moved bodily by the fleXure of the vertical standard without being subjected to strains which would tend to distort the supplemental frame, thus the two-point support for the supplemental frame avoids substantial transmission of strains, due to the flexure of the vertical standards, to the supplemental frame.

The winch illustrated in Fig. 1 is actuated by a driving shaft 36 which is journalled in brackets secured to the channel bars and extends through an aperture 37 in the front channel bar 26, the shaft 36 being provided with an angular portion38 at its outer end to receive a suitable crank and having at its opposite end an integral gear 39 which meshes with the gear 24 upon the winding drum. A suitable brake mechanism 40 having a shaft 41. provided with a rectangular portion at. its outer end to receive a crank serves to control the descent of the load. The winch mechanism may be, and desirably is, the same as that illustrated in our prior applica tion, Serial No. 86,820, filed February 8, 1926v Suitable means are provided for elevating the front end of the base frame for transportcated extension at its lower end provided with bearings for the shaft 46 of a steering wheel 47. The upper end of the steering post has connected to it a collar 48 provided with an upwardly and outwardly extending bracket 49 upon which a tongue member 59 having a bifurcated end is pivotally mounted upon a shaft 51. The steering tongue 52 which desirably is a section of pipe is telescopically mounted in the tongue member 50 and has a pin 53 extending through a slot in the tongue member 50 to limit the sliding movement of the tongue 52. A lever 54 which is pivotally mounted upon the shaft 51 is adapted to be engaged by the end of the tongue 52 when the same is forced downwardly or inwardly through the tongue member 50 so that the vertical swinging movement of the tongue will move the lever 54 about its pivot.

Another arm 55 of the lever 54 is pivotally connected to the lower end of the link 56, the upper end of which is pivotally connected to a swivel 57 having a standard 58 which rotatably mounted in a bracket 59 secured to the vertical channel 26. The link 56 and the arm 55 of the lever 54 are so disposed as to form a toggle so that when the lever 54 is engaged by the tongue 52 and the tongue swung downwardly the toggle will be straightened and the frame of the machine lifted from the floor and supported upon the wheel 47. By then withdrawing the tongue 52 from its engagement with the lever 54 the tongue may be freed to steer the machine during its transportation from one place to another;

The base frame, standards, and load supporting means of the hoisting machine illustrated in Fig. 2 may be, and desirably are, the same as that illustrated in Fig. 1', the mechanism shown in Fig. 2 differing from that in Fig. 1 only in that a different and larger supplemental frame is provided for siuaporting a power driven winch mechanism. In this construction, as in the other, the supplen'iental frame comprises vertical front an d rear channel bars 26 and 27 which are connected to gather at their bases by the horizontal angle bars 28 and 29 (see Fig. 3) and. at the top by a plate 31 which is connected by an angle bar 82 to the upper end of the front channel bar 26 and which is connected at its rear end to the plate 33 which is bolted to the transverse standard-connecting-girder 22. 7 bars 28 and 29 which connect the lower ends of the channel bars 26 and 27 likewise restupon the horizontal transverse girder 12 of the base frame and are connected thereto by bolts 30. In this case, however, the supplemental frame is of greater width so that the angle bars 28 and 29 rest upon the transverse girder 12 intermediate of their ends but in this construction, like that illustrated in Fig. 2, the supplemental frame is connected to the base frame and to the standards by a twopoint support.

The angle 6 The winch mechanism. carried by the supplemental frame shown in Fig. 2 comprises a winding drum or winch having a shaft (51 which is journalled in brackets (52 and 63 secured to the front and rear vertical channel bars. A worm gear (not shown) is connected to the shaft 61 a d enclosed within a housing 64L. The lower end or". the housing is provided with suitable hea rings for a worm shaft 65 having a worm which engages the worn. gear. The worm shaft is driven by a sprocket wheel 66 through a sprocket chain (3? which is actuated by a sprocket (58 upon the shaft of a motor ('39 which is supported upon angle bars 70 which are welded to the webs of the vertical channels 26 and 27'. The worm shaft (35 is pro *ided with a suitable brake drum 71 having bra-lie straps '4'2 and 73 which are connected to levers 74- and 75. the upper ends of which are engaged by a helical spring 76 which tends to separate the upper ends of said levers and thereby norn'ially to apply the brake to the drum.

The levers 74- and are provided with. arms 77 and 78 which overlap at their adjacent ends and are engaged by one end of a ln'ahe-releasing lever 79, the other end of? which is connected by a link 80 to an e: 'ension Ell ot the controller lever 82 ot a. controller 83 which is mounted upon the top plate 31 ot the supplemental. frame. This construction such that movement of the controller lever in either direction from neutral. position will actuate the lu'ake-releasing lever to actuate the brake, sin'uiltaneously with the energization of the .in-otor to rotate the same in the load rah sing or lowering direction. T his mechanisn'i may be, and desirably is, similar to that illustrated in our application for patent Serial No. 1.06 365, filed May 3, 1926.

The controller lever 82 may also be connected by a link 84% to a suitable mechanism for a1ltoil'iatically arresting the lllOYGl'l'KHt ol the load supporting means in the manner more fully described in the prior application above mentioned.

A steering mechanism similar to that heretofore described with respect to the construe tion illustrated in Fig. l also connected to the vertical channel bar 26 of the simplcmental frame by means of which the front end ol the :irame of the l'lOlSl'l Q machine may l raised when the inacnine is to he trai'ispm." from place to place. It will be obvious. therefore, that either a hand-driven or a powerdriven winch mechanism may be utilised for actuating the lea d supporting i'neans by m ere ly bolting to the frame .nd stamlzn'ds a suppleniental frame containng the required ac- I .ng mechanisim .t he further object it the invcn it IE; to provide a novel rigid and easily constructed lead supporting means.

The preferred "term of load supporting means illustrated herein comprises a pair of horizontal channel bar side girders 85 and. 86 tor the platform. the forward ends of which extend within the vertical. standards 15 and 16.

A platform floor or plate 8? rests upon and is secured to the upper flanges oil' the channel bars andv 86.. Uln'ights 88 and 89 are welded at their lower ends to the forward upper webs of the channel bars 85 and 86 and extend upwardly in parallelism with and in proximity to tl e vertical standards 15 and 16 respectively. These uprights are also welded to a lower horizontal channel l ar 90 which rests upon and is likewise welded to the upper webs of the channels 85 and. 36. The upper ends of the uprights 88 and 89 are also connected by a channel bar 91 which is welded to the rear flanges of said uprights, and a filler plate 92 desirably is welded to the uprights between the channel bars 90 and 91. Gui-z: t plates 93, pretcrably of triai'igular form, are also welded and riveted to the webs of the platform supporting channel and the upright 88 and to the channel 86 and upright respectively, thereby strengthening the corner connection between. the platform channels and the uprights.

Suitable autiit'riction means are provided for guiding the load supporting means thus constructed along the standards 15 and 16. In the preferred construction illustrated herein a shaft 9% passes through the channels and 86 and extends beyond the outer walls of the same to provide axles upon which rollers 95 are mounted preferably upon antitriction bearings, the rollers engaging the rear faces of the flanges ot' the vertical standards l5 and 16 respectively. The upper ends of the uprights 88 and 89 are. likewise provided with antilriction means engaging the standards. A novel rigid and simple construction is provided herein :l'or mounting such anti'lriction members and "terms an important part of the present invention. In the construction illustrated angle plates 96 are welded to the upper transverse channel 91 and also to the ed es of the upright channels 88 and 89. Stud shall's 97 pass through the angle plates 96 and webs of the channels and are secured thereto against rotation and project beyond the outer faces of the channels 88 and 89 suliiciently to term axles for aulilriction rollers 98 which engage res 'icclively the inner faces of the rear flanges of the vertical standard 15 and 16. It will be noted that the anti v...ic lion rollers 98 engage the front faces of the rear flanges of the vertical standards while the rollers 95 engage rear faces of the same flanges. the rollers 85 travelling within the channels of the vertical standards. This construction. so far as we are aware. is novel and superior to other constructions heretofore produced.

A further feature of: the invention consists in providing a relatively simple and extremely rigid means for securing the end of the hoisting cable to the load supporting means. This is accomplished in the present construction by welding the horizontal flange of an angle bar 99 to the upper flanges of the platform channels 85 and 86 at a short distance from the lower horizontal channel 90 of the load supporting means.

A stud 100 located centrally of the width of the load supporting means extends through the vertical web of the angle bar 99 and through the web of the channel 90 and is securely riveted in place and the end of the cable 20 is connected to this stud.

In order to stiffen the platform an angle bar 101 may be riveted to the plate 87 beyond the ends of the channels 85 and 86 of the load supporting means and desi ably the rear ends of the load supporting means are cut away sulliciently to enable the load supporting means to descend until the plate 87 of the platform may rest upon the upper faces of the box- like side girders 1 and 2 when the platform is in its lowest position.

It will be understood that the embodiments of the invention illustrated herein are of an illustrative character and that various changes in design, construction and arrangen ent of parts may be made within the spirit and scope of the following claims. It will also be understood that while the various members of the construction are described herein as welded together to form substantial integral structures they may be secured together by bolts rivets or other suitable means within the scope of the claims. Having thus described the invention, What is claimed as new, and desired to be secured by Letters Patent, is: I

1. A portable hoisting machine comprising a base frame provided with side girders each comprising a pair of reversely disposed channel bar-s having their flanges interengaging and welded together along the exposed edges of the channels to produce a box-like construction, and t'ansverse glrders welded to and rigidly connecting said boxlike side girders.

2. A portable hoisting machine compris-' ing a frame provided with side girders each comprising a pair of reversely disposed channel bars having their flanges interengaging and welded together along the exposed edges of the channels at intervals throughout their length to provide a box-like construction and transverse girders rigidly connecting said box-like side girders including an angle bar extending across and fitting upon the front ends of said side girders and welded thereto.

3. A portable hoisting machine comprising a base frame having side girders each comprising an outer channel bar and a reversely disposed inner channel bar having its flanges closely fitting within the flanges of the outer channel bar and welded thereto along the edges of the flanges of the outer channel at intervals throughout its length to produce a box-like construction, and means connecting said side girders including a transverse girder of angle iron extending across the open front ends of said side. girders and welded thereto along the edges of the vertical and horizontal flanges of said transverse girder, and a rear transverse girder of angle iron having its ends abutting the inner faces of said side girders adjacent the lower edges thereof and Welded thereto. at. A portable load raising and transporting machine comprising a base frame provided with side girders each comprising a pair of reversely disposed channel bars having their flanges interengaging and secured together to produce a box-like construction, transverse girders rigidly connecting said box-like side girders and a shaft extending through the vertical webs of the channel bars ofboth of said box-like side girders in proximity to their rear ends and presenting axles extending beyond the outer faces of said side girders, and wheels having antifriction bearings mounted upon said axles adjacent to the respective side girders.

5. A portable hoisting machine comprising a base frame provided with side girders each comprising. a pair of reversely disposed channel bars having their flanges interengaging and secured together to produce a box-like construction, transverse girders rigidly connecting said box-like girders, and a pair of vertical channel bars located at a distance from the frontend of said base frame and having their webs rigidly secured respectively to the inner faces of said box-like side girders to form upright standards, and guides for a vertically movable load supporting means.

6. A portable hoisting machine comprising a base frame provided with side girders each comprising a pair of reversely disposed channel bars having their flanges interengaging and welded together along the exposed edges of the channels to produce a box-like construction, transverse girders rigidly connecting said box-like girders, with gusset plates welded to the inner faces of said side girders near the front ends thereof and vertical chan nel'bars located at a distance from the front ends of said base frame engaging said gusset plates and welded to said gusset plates to form upright standards and guides for a vertically movable load supporting means.

7. A portable hoisting machine comprising a base frame having side girders and a trans verse girder connecting the front ends thereof and standards rigidly secured thereto at a distance from the front end of said base frame to form guides for an upwardly movable Illu load supporting means, a stan'dard-connecting-girder located at a distance from said. base frame, a rectangular supplemental frame for the elevating mechanism, means respectively connecting said supplemental frame to the transverse girder of said base frame and to said standard-connecting girder midway of said standards and forl'ning a twopoint connection, whereby transmission of strains, produced by the flexure of the standards, to the supplemental frame will be substantially avoided.

S. A. portable hoisting machine comprising a base frame and standards rigidly secured thereto at a distance from the front end of said base frame to form guides for an upwardly movable load supiiorting means. a standard-conuecting-girder located at a distance from said base frame, a SUpPlQlDOHiHl frame for the elevating mechanism, having a base and an upright, means detachably connecting the base of the supplemental frame to the base frame at a distance from the base of said standards, and means dctachably connecting r: rid supplemental frame to the stand.- ard-connecting girder, whereby transmission of strains produced by the flcxures of the standards to the supplemental frame will be substantially avoided and TOIHOVtIblQ replace ment of the supplemental frame permitted.

9. A portable hoisting machine having a base frame comprising side girders and a transverse girder of angle iron fitting upon and connecting the front ends thereof, stand ards rigidly secured to said side girders, at a distance from their front ends, forming guides for upwardly movable load supporting means, a standard-connecting girder located at a distance from said base frame, a rectangular supplemental frame for the elevating mechanism having its base supported. upon the central portion of said transverse girder, and detachably secured thereto, and means connecting the upper rear corner of said supplemental frame to the central portion of said. standard-connecting girder, whereby the supplemental frame and the elevating mechanism carried thereby may be readily removed as a unit similar supple mental frame having other elevating mechanism substituted.

10. A portable hoisting machine having a base frame comprising side girders and a trz-msverse girder of angle iron fitting upon and. connecting the front ends thereof, stand ards rigidly secured to said side girders at a distance from the front end thereof forming guides for an upwardly moving load supporting means, a standard connecting-girder located at a distance from said base frame, a supplemental. rectangular frame for the elevating mechanism having front and rear vertical channel bars, and a bottom girder supported upon the central portion of said transverse girder, and having a top plate connecting the upper ends of said vertical channel bars, means detachahly connecting the top plate to the standard-connecting girder, and means detachably connecting the bottom girder of the supplemental frame the transverse girder of the base fran'ic, whereby the supplemental frame and elevat ing mechanism -arried thereby may be readily removed and a similar sunolemental frame having other elevating mechanism subs stituted therefor.

11. A. portable hoisting machine having a base frame comprising side girders and atransverse girder of angle iron fitting upon and connecting the front ends thereof, "andards rigidly secured to said side giriiers at a distance from the front end thereof forming guides for an upwardly moving load supporting means, a standard-connect-in girder located at a distance from said base frame, a. supplemental rectangular frame for the elevating mechanism having front and rear vertical channel bars, angle iron girders welded to the flanges ofsaid channel bars at the bottom thereof and resting upon the central portion of the front transverse girder of the base frame, atop plate connecting the upper ends of said vertical channel bars, means detachably seeming said top plate to the standardconnecting girder, and means detachably connecting the bottom angle iron bars of the supplemental frame to the central portion of the transverse front girder of the base frame. 7

1 In a hoisting machine comprising a base frame and standards of channel iron extending upwardly therefrom, a vertically movable load supporting means comprising plat-form side girders having their ends located in proxin'lity to the flanges of the stand ards, channel bar uprights secured to said platform side girders extending in parallelism with said standards, a transverse channel bar secured to said platforn'i-girders and to said uprights, means connecting the upper ends of said uprights, and ant-ifriction means secured respectively to said platform girders and to the upper ends of said uprights engaging respectively the inner and outer faces of the. rear flanges of said verti al standards.

13. In a hoisting machine comprising a base frame and standards of channel iron extending upwardly therefrom, a vertically movable load supporting means comprising platform side girders having their ends located in proximity to the flanges of the standards, channel bar uprights secured to said platform side girders extendii'ig in parallelism with said standards, a transverse channel bar secured to said platform girders and to said uprights, a channel bar connecting the upper ends of said upright-s, angle plates Welded to the web of said channel bar and to the flanges of the uprights, stud shafts extending through and secured to the webs of the uprights and the respective angle plates, and antifriction rolls upon said shaft engaging the inner face of the rear flange of the standard channel and antifrict-ion rollers mounted upon the platform girders engaging the outer faces of the rear walls of said channel standards.

1%. In a hoisting machine comprising a base frame with vertical standards of channel iron extending upwardly therefrom, a vertically movable load-supporting means comprising platform side girders having their ends located in proximity to the flanges of said standards, channel. bar uprights secured to said platform side girders extending in parallelism with said standards, a transverse channel bar secured to said platform girders and to said uprights, and an angle bar located in front of and spaced apart from said transverse channel bar and connected at its ends to said platform girders, and a central stud connecting the vertical Web of said angle bar and the vertical Web of said transverse channel bar forming an anchorage for a supporting cable, and antifriotion means secured respectively to the platform girders and to the upper ends of said uprights respectively engaging the inner and top faces of the rear flanges of the vertical standards.

15. A portable hoisting machine having a base frame comprising side girders and a transverse girder of angle iron fitting upon ing girder located at a distance from said base frame, a rectangular supplemental frame for the elevating mechanism having its base supported upon the central portion of the transverse girder of the base frame and detachably secured thereto, means detachably connecting the upper rear corner of said frame to the central portion of said standard-connecting-girder, a steering wheel bracket detachably connected to the lower end portion of the front channel bar of the supplemental frame, a steering wheel having a post rotatably and reciprocably mount ed in said bracket, a steering tongue and means operable by the vertical swinging mrnement of the steering tongue to raise said bracket upon said steering post, whereby the front end of the machine will be sup ported upon the steering Wheel.

In testimony whereof, we have signed our names to this specification.

FREDERICK J. SHEPARD, JR. NATHANIEL l/VARSHAl/V.

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