US1019478A - Railroad track-scale. - Google Patents

Description

A. J. JONES. RAILROAD TRACK SCALE.

APPLICATION FILED JULY 11,1911.

Patented Mar. 5, 1912.

4 SHEETS-SHEET 1.

, flllll d (IeJilldi H attozmq A. J. JONES. RAILROAD TRACK SCALE. APPLIGATION FILED JULY 11,1911.

Patented Mar. 5, 1912.

1 SHEETS-SHEET 2.

WWI, A.

A. J. JONES.

RAILROAD TRACK SCALE. 1,019,478.

APPLIOATION FILED JULY 11,1911.

Patented Mar. 5, 1912 4 SHEETSSHEET 3.

lgff'tifllj. Q y

ildredlJonee 544mg all" A. J. JONES.

RAILROAD TRACK SCALE. APPLICATION FILED JULY 11,1911.

Patented Mar. 5, 1912.

4 SHEETS-SHEET 4.

State of Louisiana, have invented a new ALDRED JAMES JONES, OF NEVv OR-LEANS. LOUISIANA.

RAILROAD TRACK-SCALE.

Specification of Letters Patent.

Patented M 31'. 5, 1912.

Application filed July 11, 1911. Serial No. 637.930.

To all-whom it may concern:

Be it known that I, Armani) J. Jones, a citizen of the United States, residing at New'Orleans, in the parish of Orleans and and useful Railroad Track-Scale, of which the following is a specification.

The inventionrelates to improvements in platform scales.

I The object of the present invention is to improve the construction of platform scales, more especially railroadtrack scales, and to simplify and increase the strength and durability of the same, and to enable a single pair of relatively long platform levers to sustain the entire weight of the platform or track sections and the load'to be weighed, and also to provide,bearing and fulcrum pivots of any desired length and strength for the said levers.

A- further object, of theinvention is to provide a railroad track scales of this character, adapted to permit an adjustment of the. pivots in determining the multiplication of the platform levers and .in which the pivots will be permanently fixed after the multiplication of the levers has been determined, so that there can be no change of multiplication except through wear of the,

pivot or the grinding ofthe edges thereof, whereby it Will be impossible in weighing 0 erations to fraudulently manipulate the scales.

Another object of the invention is to provide railroad track scales of this character in which the pivot-fulcrum bearings will be suspended for permitting an oscillation or vibration of the platform or track section, so that cars may be run onto and off of the same withoutinjuring the scales or affecting the accuracy of the same.

Vith these and other objects in view',the

'invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appendedrit being understood that various changes in the form, proportion, size "and minor detailsi of copstriiction, within the. scope of the cla nis', ,1na y be resor ted to without departing from the spirit or'sacrilicing any of the advantages of the invention.

in the drawings l igure 1 is a side elev: tion partly in section of a railroad tracl; scale. constructed in accordance with this invention. Fig. 2 is a plan view of the same, the platform orltrack section icing illustrated in dotted lines. Fig. 3 is a trans verse sectional. view on the line 33 of Fin. 1. Fi l is a-transverse sectional, view on the line t l of Fig. 1. Fig. 5 is an enlarged longitudinal sectional view on the line of Fig 2. Fig. (l is a detail perspective view of the bearing stand. Fig. 7 is a detail perspective view of the platform bearing. 8 is a similar view of the bearing pivot holder. Fig.8 is adetail view of another form of the suspension frame. 10 is a detail view illustrating the mann er of slidably interlocking the bearing stand with the firner supports. I

Like numerals of reference designate cor responding parts in all the figures of the drawings.

In the accompanying drawings in which is illustrated the preferred embodiment of. the invention, the scale is in the form of a railroad track scale, and while the improvements'are designed particularly with reference to railroad track scales and similar .heavy platform scales, they may be advau tageously employed in the smaller class of scales,-sucl.1 as hay scales,'and vario s o er wagon. scales and the like. i

The railroad track scales comprises in its construction two longitudinal platform levers 1, designed to be made of structural "steel, ore-other suitable material, and extend 1ng from the ends of the scales to the center thereof, that portion of the scale which sustains the weight of the platform 2" and the load bemg'constructed in two sections, as clearly shown in Figs. 1 and 2, thereby dispensing with the numerous levers ordinarily employed in railroad track scales and the inconvenience of adjusting such levers and maintaining an accurate multiplication in the same. p

Each of the platform levers 1 comprises in its construction a straight longitudinal beam 3 of. channel metal, or other sultable material, u'ml a. lJl'zJiO i 'also constructed of chcimcl metah or other siiitublc nmtcriul, and consisting oil? an inner diagonally arranged portionj, Hill a longitudinal outcr portion 6. arrangcil in parallelism with the ontcr portion oi the beam 2:3 amt l conncctctl with the hitter by transverse struts or memlicrs T owl 8, also preferably consisting oi? charm-cl beams. The diagonal portion 5 c);-

cucls inwzirtlly uml trzmsvcrscly il rtml the longitudinal portion (3 01' the brace l to the longitudinal l)t?flll1 2}, and the brave, the bean. mul thc struts ure connected together by plates uiul rivcts in. thc usual manner. 'lhc i'imti orm lever l is proriiletl at tho inncr tll'ltl of the boom with n trzmsrcrsclv (lisposcil hot n 1), sccurml at its inner cml to the inner 'zml litmus by plates and cntl'ot tho ltilig'ltlltll rivets anti i'cin'liorcetl by a brace it) and forming a lntcrul extension and carrying a short terminal longitudinal portion 11. The brace 10, which is :mgulirly tlispost-(h is locntml ;liT- the opposiic nit oi? the homo ll l iii the hrzu-c 4-, and it coils ioivcr ll): from tho outer portion, ot the trtmm'crsc strut or member 7 t thc platfornr prcternlilv consist, (1" so 2:1 .1 and is located a the cotter Clitt ct 1e lever o thc upper portion of the lOIlQ'l' li'czi'm and the outer he hr cc 4 p wo being pref-only arr: ngctl in relation with tho upper Eric is oi"; the slid. KAfli l 21ml thc outer pol tion 6 o". the l Secured to the bottom cotertrzmsvcr pivot holder or suppo 13 etl of suitable "metal anti e tending aci s thc lever, anti proviclctl at opposite sites withlongitudinal. flanges iiihaving slots 15 for the reception of bolts is, which pierce the bottom hinges of the outer transvcrs v itrut or mcmhcr Y.

The SlO'LS an i bolts permit on ntljustmcntot tho its? holder or support. to slim tr; In a 1? anti arrange t. 1e some in proper o- The hotly 0 or of the ml oivot. holder or so is 23 m: t. mgular in cross 7c tlepeiitts hcstrot or member 7, the Sill arran; cl at the top of t b 1 i r support, clearly illustrated in 5 of the drawings. The cross sectional or or support rctliices 8 he pivot he: bottom portion. thereof, and the fice with a groove 18, extending longitudinally oi the support and receiving it knife etlgc pivot- 19, which is received within a hearing recess 2001'? a bearing stz ml ll, tending across the space between the longitudinal beam 3 and the longitudinal portion of the lmico 4-, and mounted upon a transverso Lbcrim 22 and secured to the same by bolts 28. Tho hearing stand is proviclccl at the top with upwzu'tlly projecting parallel Sltlc llnuges 524i, forming side Walls anti cow ncctetl by end \ElllS 25 to provitlc 5i lulu cunt reccptuclc tor holding oil to enzihlc the pivot and its hearing to he suhrncmed in the lubricant whereby the friction and wear of the pin-ts are reduced to a minimum and the durability of the fulcrum pivot and its bearing corresoontlingly increased. The and walls 2-3 pro chi c0: sist of clatesextenling across the space between the sicle flanges 2 and to the some by scrtrws or other suit-- able lira-sterling means. 'lhe bearing stand, which is cross tsectiomilly tapered at its lowcr portion, is proviocd opposite siclcs thcreoit with flanges QG tor the reception of the bolts toperinit an. adjustment and LllllQKllQllt o; the hearing; stand 21.

tieciirect to the 1m 'cr face of the beam 22 are cros. bars 27, located. adjacent to the ends of the hemos and projecting laterally thcrcfrooi and supported in links .38, which arc suspended from corner supports by aria justing screws preferably: in the form vertical eye bolts 29. The links 28 are roumlcoi at their ends'antl the lower fices oi th projecting terminal portions of the cross stirs 27 are correspondingly rounded at tho links to fit. the smiles The corner supports 25. each consist of :r hrnrizontal base Hi) and spaced vertical sidcs or standards, which arc connected at their upper ends by a h vrizontal top lmr or portioir 31 through '(:h the eye boltspnss, anti upon which are m'rimgoi nuts 32, mlcptetl to aisc and his Slitlltl :tor lcvciiiig the iowcr tie he. sculc "lhc ports z'iiichoretl by bolts 33, or other its tcnim means to at suitable "foundation, and. tho links, which suspend the bearing stand Within the corner supports, are adopted to permit. a limited swing; or oscillation :of the stand to permit the scale to yield to the hrzilion and jar incident to"'imning cars o mi oli the platform, but if desired winging vibration o" the hearin stand hc ciimimiteel by providing grooves 34; as the or stmclcrls er supports to receivc the pro ids of the cross 27, as illus- Fi 10 of the drawings. The g'groowas 34h 'hich are vertical, do not intot-tore with the vertical adjus ment otthc hcnricg stand for leveling the scales.

lmsc of each oi the corilcrpup The inner transverse strut or member 8 which preferably consists of an I-bcam, is located at a point intermediate of the ends of the lever adjacent to the outer end thereof. and having its lower face in flush relation with the lower faces of the longitudi-' nal beam 2-) and the outer portion 6 of the brace l. and having a bearing pivot support or holder 35. secured to its upper face by bolts 36. The bolts 36. which pierce the top flanges of the transverse strut or mem ber 8, are arranged in slots 3? ofthe bottom side flanges 38.0f the holder orsupport- 35, the slots and bolts permitting an adjustment and alining ofthe knife edge hear .ing pivot 39. The pivot holder or support 351is= provided with a central longitudinal grooveAO in which the pivot 89 is mounted, and the said support or holder is provided at opposite sides with vertical side flanges ell. foru'iing side walls and connected by end walls P3. consisting of plates secured by screws, or other suitable fastening means to the side, walls.- The side and end walls of the pivot support or holder 35 project abovethe plane of the pivot and form a lubricant receptacle for the reception of oil, or other suitable lubricant in which the pivot and the recess 43 of the platform bearing 44 are submerged to reduce the friction: and wear and increase the durability of the parts. The platform bearing 44e'has a reduced lower portion inthe lower face of which is the bearing recess 43, and the said platform bearing is cross sectionally tapered andprovided at the top with side flanges 45, having slots 46 for the reception of bolts 47, which secure the platform bearing to the transverse I-beam 48. The slots and bolts permit an adjustment of the platform bearing for alining and properly positioning the same. The bearing and fulcrum pivot holders or supports, the bearing stand and strength is thereby obtained.

the platl'm'm bearing'are strongly backed of the levers,-and after the latter has beendetermined and the parts secured in their adjustment by the bolts or rivets, it-will' be impossible to tamper with the scales and manipulate the same for fraudulent weighing, as the adjustment of the bearing pivot and the fulcrum pivot are necessary to alter themultiplication of the levers. Since the point pivots are fixed with relation to the lever and the adjustment is obtained only through the fulcrum and bearing pivots, it will be lllll'NlSSlblt. to change the latter withi;ut taking down the scale.

The pl'atftirm -2, which is in the form of a track sectiomis mounted upon girders l9 of steel. or other suitable material, extending longitudinally of the platform and located beneath the same and equipped at their ends with suspension frames 50. The suspension frames 50, which are disposed transversely of the platform, are located at the end portions thereof'and may consist of a. horizontal top bar 51 and depending arms arranged in pairsrat opposite sides of the ends of the bar 51, which is secured by bolts or other suitable fastening devices to the bottom flanges of the longitudinal girders 49. The horizontal top bar 51 enables a plurality of the longitudinal girders to be mounted upon it, and although only two girders are illustrated in Fig. 3 crane drawings, the number may be increased if desired. Instead, however, of employing suspension frames of a length toextnd entirely across the platform, spaced corner suspension frames 54, similar to that illustrated in Fig. 9 of the drawings, may be used. The corner suspension frames are designed to be arranged in pairs vat the ends of the platform and are provided at the top with attaching flanges 54, which are bolted or otl'ierwisesecured to the side girders. The said corner frames are also provided with a pair ofjarms arranged similar to those of the suspension frame 51. The pairs of depending arms of the suspension frames are located at opposite sides of the platform bearing, and are connected at their 'loWer ends by parallel bottom bars 55, which are suspended by links 56 and 57 from cross bars 58 The parallel side bars 55 are disposed transversely witl relation to the platform, and they extend he entire length of the suspension frame, as clearly illiistiated in Fig. 3 ofthe drawings. The links 56 and 57 are arranged in pairs, the lower links 56 receiving the parallel horizontal bottom bars of the suspension frame and fitted in bottom bearing grooves'or recesses 58 thereof. The upper links 57, which are. ar-' ranged at right angles to the lower links, are linked into the samc,'an,d they are arranged upon the cross bars 58, which extend through the upper links. 'The cross bars 5h which are horizontal, are secured by bolts 59 to the upper flanges of the beam 48 of the platforn'i.bearing, and the said cross bars 58 project laterally from the beam and their terminals extend'into the space between the depending arms of the suspension frame, as clearly illustrated in Fig. 5 of the drawings. The mounting of the platform in this mannerenables the same. to swing both longitudinally and latcrady to yield to the ars and vibrations incident to running cars onto and oil of the platform, whereby the scale may be subjected to such jars and vibrations with out liability of excessively wearing or otherwise injuring the bearings or affecting the accuracy of the same.

The inner point pivots 12 are arranged in bearings 60 of loops G1, which are connected by linlis G3 to a rod 64, suspended from a shelf lever 65 of the ordinary construction.

.The shelf lever is connected by a rod 66 with a weighing beam 67, constructed and mounted in the ordinary manner, as indicated in Fi 1 of the drawings. As the particular construction of the weighing lever and the means for connecting the same with the platform levers do not constitute a por tion of the prgsent improvement, and as any form of weighing beam and connections may be employed, further description and illustration thereof are deemed unnecessary. Having thus fully described myinvention, what I claim as new and desire to secure by Letters Patent, is

1. A scale of the class described including a platform, a pair of platform levers located beneath the platform and extending from the outer endsthereof to the center of the scale and provided at their inner ends with fixed point. pivots, fulcrum and bearing pivots secured to the outer portions of the platform levers and having a preliminary ustment through their fastening means, which rigidly-and permanently secure the said pivots to the platform levers after such preliminary adjustment, bearing stands receiving the fulcrum pivots of the levers, and bearings supporting the platform and mounted up onthe'bearing pivots of the levers. A scale of the class described including a platform, platform levers located beneath the platform and extending from the outer ends thereof to the central portion of the scale, fulcrum pivot holders arranged at the outer ends of the levers, bearing pivot holders arranged at points intermediate of the ends ofthe levers, fastenin means securing the said holders to the levers and permitting a preliminary adjustment of the same and rigidly securing the holders in their adjustment, fulcrum and bearing pivots carried by the said holders, bearing stands receiving the fulcrum pivots, platform bearings sup porting the platform and mounted upon the bearing pivots, a weighing beam, and means for connecting the inner ends of the levers with the weighing beam.

3. A scale of the class described including a platform,- levers located beneath the plat" form and extending from the outer end. thereof to the center of the scale and each comprising a longitudinal. beam, a brace connected at an intermediate point with the longitudinal beam and having-its outer portion arran ed in parallelism with the thereof to the center of the scale and each comprising a longitudinal beam, a brace connected at an intermediate point with the longitudinal beam and having its outer portion arranged in parallelism with the outer portion of the beam, inner and outer transverse struts connected tothe outer portion,

of the: brace and the said beam, fulcrum and bearing pivot holders provided with slots or openings and having fastening means operating in the slots or openings and ad justably securing the pivot holders to the said struts, fulcrum and bearingpivots carried by the .said holders, bearing stands receiving the fulcrum pivots, and platform bearings supporting the platform and mounted upon the bearing pivots.

5. A. scale of the class described includ' ing a platform, levers located beneath the platform and extending from the outer ends thereof to the center of the scale, and each comprising. a longitudinal beam, a'brac secured to the beam-at a point intermediate of the ends thereof and having an outer portion arranged in parallelism With and spaced from the outer portion of the beam, a-transverse beam extendingflaterally from the inner endof' each longitudinalbeam, inner longitudinally disposed terminals carried by the transverse beimsUinner and outer transverse struts connecting the brace and the longitudinal beam, fulcrum pivots secured to the outer struts, bearing pivots mounted upon the inner struts, bearing stands receiving the fulcrum pivots, and platform bearings supporting the platform and mounted upon the bearing pivots.

6. A scale of the class described includ ing a platform, levers located beneath and extending from the outer ends of the platform to the center of the scale, and each comprising a longitudinal beam, an outer brace consisting of a diagonally arranged portion connected to the longitudinal beam,

and a longitudinal portion arranged in parallelism 'ith the. outer portion of the beam, a transverse beam extending laterally from the mncr end of the longitudinal beam, an

inner diagonal brace connecting the trans verse and iongitudinabeams, and inner and, outer transverse struts connecting the.

struts, fulcrum and bearing pivots carried by the said holders, bearing stands receiving the fulcrum pivots, and platform bearings mounted upon the bearing pivots and supporting the platform. Y 7. A scale of the class described including a platform, levers located beneath the platform and fulcrumed at their outer ends, bearing pivot holders mounted upon the levers and provided with knife edge pivots and having walls surrounding the same and forming lubricant receptacles, and platform bearings supporting the plat-form and having portions extending into the receptacles of the supports and provided with recesses receiving the pivots.

8. In a scale of the class described, thecombination with a platform,of a platformlever arranged beneath the platform and having spaced portions located at opposite sides of the scale, means for fulcruming the outer end of the lever, a bearing pivot holder extending across the space between the said portions of the lever and provided with a knife'ed'ge pivot and having side and end walls extending above the pivot to form a lubricant receptacle, and a plat form bearing supporting the platform and extending across the same and having a lower POI'UOII'IIIOUHtGd'UPOD thesald knife edge pivot and arranged within the said receptacle.

9. In a'scale of the class described, the

combination with a platform, of a lever lo-' cated beneath the same and having spaced portions arranged at'opposite sides of the the platform and having a reduced portion projecting into the lubricantzreceptacle and to the platform bearing, and means for conmounted upon the knife edge pivot.

10. In a scale of the class described, the combination with a platform, of a lever located beneath the platform and having spaced portions, means for fulcruming the outer end of the lever, a beam connecting the spaced portions, a bearing pivot holdermounted upon the said beam and extending across the leve r, a knife edge pivotextending longitudinally of the said holder and Se cured to the same, a plat-form bearing also' extending across the lever and mounted upon the bearing pivot, a transverse beam secured necting the platform with the last-mentioned beam.

11 In a scale of the class descrilfed, the

combination. with 'a platform, of a lever located beneath the platform and having spaced portions, means for fulcruming the outer end of the lever, a beam connecting the spaced'portions, a bearing pivotholder mounted upon the said beam and extending across the lover, a knife edge pivot extending longitudinally of the said holder and secured to the same, a platform bearing also extending across the lever and mounted upon the bearing pivot, a transverse beam secured totherplatform bearing, a cross bar secured to and projecting beyond the lastmentioned beam, and links arranged upon the projecting ends of the cross bar and connecting the platform with the beam.

, 12. In a scale of the class described, the

combination with a platform, of a lever, means for fulcruming the lever, a bearing pivot carried by the lever,-.a platform bearing mounted upon the pivot, a cross bar carried by the said bearing and having projecting portions, -.1i suspension frame secured to the platform and extending below the cross bar, and links connecting the projecting portionsof the cross bar with the lower port-ions of -the suspension frame.

13. In a sealeof the class described, the combination with' a platform, of a lever,

means for fulcrumin'g the lever, a bearing.

pivot carried by the lever, a platform bearing mounted upon the pivot, a cross-bar carried by the said bearing and having projecting' portions, a suspension frame secured v to the platform and having depending arms arranged in pairs and located at opposite sides of the projecting portions of the cross bar, and links connectingtl e ends of the cross bar with the arms of the suspension frame. I

14, In a scaleof the class describ ed,'the ebmbination with a platform,- of a lever,

' means for fulcruming the lever, a bearing pivot carried by the lever, a platform bearing'mounted upon the pivot, a cross bar carried by the said bearing and having pro jecting portions, a 'suspension frame secured to the platform and having depending arms arranged in pairs and located at opposite sides of the projecting portions of the cross. bar, horizontal bars connecting the lower ends of the =arms of the suspension frame, and links receiving the said horizontal bars and arranged and depending from the projecting portions of the cross bar.

, 1 5. In a scale of the class described, the combination of a platform, a lever,'means for fulcruming the lever, a bearing pivot carried by the lever, a platform bearing mounted upon the pivot, a suspension frame secured to the platform and having dependin'garms arranged in pairs at each side of the platform bearing, said suspension frame being also provided with horizontal bars located at opposite sides of the platformbearand extending between the said ,arms and receiving and supporting the links.

16. In a scale of the class described, the combination with a platform, of lever lo- ?ated beneath the platform and provided With spaced portions arranged at opposite sides of the platform, a transverse beam connecting the spaced portions, means for tulernming the lover, a hearing pivot holder secured to the said beam an extending across the space between the portions of the lever and provided with knife edge pivot, platform bearing also extending across the lever and supported uponthe said: pivot, a transverse beam secured to the platform bearing and having laterally project means, a suspensionframe secured to the platform and provided with arms arranged in pairs and located at opposite sides of the said projecting means and extending below the same, and links connecting the project leg means With the lower ends of th. arms.

17. In a scale of the class described, the combination with a platform, of a lever having spaced portions, a fulcrum pivot extending across the lever, a hearing stand provvided at the top with Walls t'orn'iing a in hricant receptacle and receiving the fulcrum pivot, and means for mounting the pl attorin upon the lever. I

18. In a scale of the class described. the combination vvlth a plat-term, of a lever hav l ng spaced portions, a pivot extending across the spaced portions, a hearing; stand extend mg across the lever and receivnig the folcrum pivot, supports, ad usting means connectinn; the hearing stand with the supports for raising and lowering" the stand to level the scale,.and means for mounting the plat form on'the lever.

19. In a scale of the class described, the combination with a platform, of a lever having spaced portions, aheam extending across the spaced portions, 21. fulcrum pivot support secured to the lower face of the beam andextending across the lever and provided at the bottom with a knife edge pivot, a hearing standprovided at the top with a healing recess to receive the said pivot and having Walls surrounding the recess and forming a lubricant receptacle, and means for moiinting the platform on the lever.

, 29. In a scale of the class described, the combination with a platform, of ailever havingspaced portions, a fulcrum pivot holder extending across the space between the said portions, a pivot. carried. by holder, a hearing stand receiving the pivot, a heain arranged transversely otthe lever supporting the heaiing stand, means connected with the beam for raising and lowering the stand, and means for mounting the platform on the lever. i

21. In a scale of the class described, the combination of a platform, a lever having a fulcri'in'i piv t a hearing stand receiving the fulcrum pivot, a seam supporting the hearing stand, supports provided with vertical adjusting screws, links connecting the adjusting screws with the heain for leveling the scale, and means for mounting tl a plat;- form on the lever.

l'n a scale of the class described, the combination of a platform, a lever having spaced portions, a fulcrum pivot holder ex" tending across the spaced portions and provided with a pivot, 21 hearing stand also extending across the said pivot, a transverse beam secured to the bottom of the stand, cross bars arranged beneath the beam and. projecting therefrom, corner supports, ee tical adjusting so mounted on the corner supports, links suspended from the screws and receiving the proj'ectii'ig portions of the said hers, and means for mounting the platform on the lever.

QS ln a of the class described, the combination with a platform, of a lever haw ing spaced portions, a :ilcrum pivot holder extending across the spaced portions, a pivot carried by the said holder, a hearing stand also extending; across the said lever, a beam. secured to the hearing stand at the bottom thereof, corner supports each comprising a base, standard and standards, vertical adjusting screws depending from the top of .the corner supports, links located at opposite sides of the hearing stand .and connected with the adjusting screws, means for conneetingthe links \ith the said beam, and means mounting the platform upon the lever.

94-. In a scaleof the class described, the combination of a platform, a lever having a top connecting the spaced portions, a beam connecting the spaced portions, a fulcrum pivot holder eX-- tendin across the lever and fitted a -ainstthe lower face of the beam and having slots and provided with a pivot, a hearing stand receiving the pivot and provided at the bot tom with slots, transverse heain supporb the the

the bearing stand, links suspending the bearing stand from the corner supports, a platform bearing mounted upon the bearing pivot, a suspension frame secured to the" platform and having arms located at opposlte sides of the platform bearlng, and llnks connecting the anna of the suspension frame with the aidplatfonn bearing.

In testimony, that I claim the foregoing as my own, I have hereto afllxtd my stgnature 10 in the presence of two \vltnosscs.

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