US2618295A - Crankshaft bearings for looms - Google Patents

Description

4 Sheets-Sheet l Arme/'Mx E. F. BAHAN CRANKSHAFT BEARINGS FOR LOOMS Nov. 18, 1952 Filed March 8,- 1949 Nov. 18, 1952 E. F. BAHAN 2,518,295

CRANKSHAFT BEARINGS FOB Loon/1s Filed March s, 1949 4 sheets-sheet 2 Nov. 18, 1952 E. F. BAHAN 2,618,295

I `CRANKSl-IAFT BEARINGS FOR LOOMS Filed March 8, 1949 4 Sheets-Sheet 5 Nov. 18, 1952 E. F. BAHAN l l2,618,295

CRANKSHAFT BEARINGS FOR Loon/1s 4 Sheets-Sheet 4 M, H om rm. R m f Filed March 8, 1949 Patented Nov. 18, 1952 i U'Nlreo sTATEfsf PATENT oel-loe This invention relates to a loom and more'r especially to a mounting for the crankshaft of thin-ja` loom and a girt associated therewith for lending;

rigidity to the side frames of the loom.

Looms usually have side frames connected together by an arch and `also connected together by means of a breast beam and front and re lower girts. A'Vcrankshaft is usually rotatab mounted on the yloom frames. 'I he cranksha t has a pair of crank throws and has pitman rd connecting thesame to swords which impat oscillation to the lay. The loom also has a ca shaft with picker cams thereon for operating pick shafts for quickly moving the picker sticks to propel the shuttle across thevlay of the loom in a weaving operation. y v- Heretofore there have been various means pr vided for mounting the crankshaft of the loo 4 and there have been additional strengthening and stiffening means extending crosswise of .the loom immediately adjacent the crankshaft and being connected at opposite ends thereof to the proximate sides of the side frames. However, these girts have not proved satisfactory partienlarly due to the difiiculty and the time and etici't required in properly alining the bearings mounted one'ach of the side frames of the loom for rotgat, ably supporting opposite ends of the crankshaft.

Furthermore, during operation of the loom, the

the side frames of 'the loom and each of which provided with a' pair of semi-circular grooves disposed inexact alinement with each other and between which the vcranks adjacent each end of 4 Claims. (Cl.A 139-1) the'y crankshaft are-adapted -to pass and tofurther providev a pair of bearing caps for each of the cast bearing units', having an inverted semiwith the axis of the semi-circular bearing grooves in the cast bearing unit, as a result of which the cast bearing units .at opposite ends of the loom are held in accurate alinement `with each other, thus insuring that the bearing in which the crankshaft is mounted Will wear* evenly throughout their length and also servingto lend rigidity to the side frames of the loom to l`thereby permit the loom to be run at relatively high speeds without any undue vibration. Thus `the productive capacity of looms equipped with this improved mounting and the girt for thecrankshaft is greatly increased, and stoppages for re-alinement of the crank shaft bearings is eliminated.

Some of the objects of the 'invention having been stated, other objects will appear as the description proceeds, when takenin connection with the accompanying drawingsg'in which Figure 1 is a top plan view of a loom with parts in section andvshowing the improved girt with the cast bearing units mounted thereon, but omitting the grease fittings;

Figure 2 is a vertical sectional yview taken substantially along the line 2 2 in Figure 1 and showing a'loom equipped with the new girt and one of the cast bearing units and with some of the usual parts of the loom being omitted, the grease fittings associated with the bearing unit being omitted;

Figure 3 is a vertical sectional view taken substantially along the line 3--3 inFigure 2 showing yhow the supports for the center bearing blocks forfthe cam shaft are connected to the improved girt and showing the cast bearing .units at opposite ends thereof but omitting the grease ttings;

Figure 4 is an exploded isometric view showing the cast bearing unit at the right-hand side of Figures 1 and 3 removed from the loom and showing the grease fittings in the bearing caps associated therewith; y

Figure 5 `is an enlarged vertical sectional View showing the manner in which the semi-circular bearing members are mounted in the castbearing unit and being taken substantially along the vline 5-5. in' Figure l, but omitting the loom. frame and the.cranksliaft;. f

amant mounted thereon from whence the warp is drawn` to a conventional sand roll I and thus to a suit-v able cloth take-up mechanism', not shown. 'The n swords I3 oscillatably mounted at their lower ends on the rocker shaft I1 and supporting 'a `-1ay .26

and a reed cap 2| on the upper end thereof. A A

suitable reed 22 is mounted between the lay "26 and the reed cap 2|. Sventionaloa-m shaft 24 having pickcams A25 xed# ly'fmoun'tedthereon 'which lare `adapted to engagefthe usual pick arms, not shown, whi-'chare iristrurriental in proj ecting-theshuttla'not shown, acrossl the upper .surfaces'ohthe lay. 4 ALoorns'u'of this type are `usually provided with a pair fof 'spaced forwardly and rearwardly 'extending middlegi'rts 21 whichare'connect'ed at their front and rear' ends to-the front and rear girts I-2f-"ahd f3-,'respectively, `as byfbolts 30 andA these middle girts i2 1"' support lconventional 'auxiliary shaf-t'fbearing boxes v'32 in whichv the opposite ends o al conventionalauxiliary shaft 33 are rotatably "mounted -and"which usually `hasV the vconventional harness cams,fno`t shown,mounted thereon. AThis auxiliary-shaft .133.Jalso Ahas Aan vauxiliary shaft "gear 'Sx'edly mounted thereon 'which meshes with fan-idl`ergear -36 '(Figure 2) driven by. alconventional harness 'change' `gear '31 liixedly mounted on'thelcam'shaft 24. I A

The-camshait 524 is rotatably mounted `in the usual "bearings V40 "suitably secured to *opposite sides of the loom and the medial 'portion Vo'f- -the cam sha-ft -24-is rotatably Amounted `in lbearing blocks' 4'2 and '42. 'It maybe observed in 'Figure '3 'thatli'lhev bearing block AY4,2 tis "secured as Iby bolts 44 (Figure 2) to a-lcen'ter bo'x bracket 43. Parts associated with the bearing block 42' beingidentifcal A"to Aparts"associated with the bearingblock 42fwil1-therefore-'bear like reference characters to the parts associated with the! bearing block '42-with'the prime rnotation added. t

center box 'bracket v43, atv-the "right-hand bearingv block `42 andhas 'an oil -set ldownwardly extendingportion '146 integral therewith Vthe left- `hand-surface of which-engages the right-lf1arid middle girt 21 and the right-hand surface (Figure 73)* of :which engages' afoot'jmember 41;,` the llojwerendoiwhich visadaptedto rest on thelioor which supports'the' loom. The-ffoot-member 4 1 has'a projection E5i] integral therewithmwhichis penetra-ted alver'tically vdisposed adjustment screw 5 I which :engages-the -lower edge of' the 'downwardly i'projecting portion f46 integral with fthe-'center' box bracket 43 vfor vertical adjustment of thefcenterboxbracket 4-3 -`so the-"'uppe'rsurface ofan AL-shaped bracket 5-2,2securet i tothe upper portion of the center box bracket-"'43-A as by'bolts 53, vmay engage a transverse girtA ArnemberSS. which isa `part 4of thepresent' invention and will te' 'later aescribedrin detail. y

` It maybe observed Figure Y2z that the 'down wardly `projectingportion 461 of the "center box bracket 43 has vertical adjustment slots"51'there'' The loom also has a con- 4 in which are adapted to be slidably penetrated by bolts 66 which also slidably penetrate the vertical portion of the middle girt 21 and the foot member 41 has slots therein which coincide with the slots 51 in the portion 46 of the center box bracket 43 and which are also penetrated by the bolt 66 to thus secure the center box bracket 43 and the foot member 41 to the middle girt mem-y ber 21 after the center box bracket 43 and the foot rrnernjberj'lil''have been adjusted relative to each other by the adjustment screw 5 I.

'Referring to Figure 1 it may be observed that l the girt 55 has ya plurality of spaced longitudinally yextendingslots 65. therein, some of which are adapted to be slidably penetrated by bolts 63 and 63 Vfor securing the brackets 52 and 52', respectively, ztothetransverse girt 55.

rPhe transverse girt 55 is secured at opposite lends'thereof as by bolts 64 and 64' to inwardly extending underlapping portions 65 and 65' re spectively, of cast bearing vunits broadly designated at '10 and 16', respectively, `to lbe 'later described in detail. The 'cast bearing lunits 10 Iand 10 rotatably support a conventional crank shaft V'H in a manner to be later described. The crank shaf-t- 1I has'cran'k throws -12 and 12' integral therewith vto which one AendY vof pitman rods 13 and i132 respectively, are pivotally connected, their fotherfends being pivotally connectedto the swordsIB. 'It might be statedl that the'loom also has :a suitable'arch ibarl which is ,secured at leach end thereof to the side frames of the loom'by vany suitable mea-ns such as bolts 16;

l-Ie'retofore, in many looms, the crankshaft 1I of the-loom has been mounted in suitable'bear ings disposed in the top portions of'theside'rame I0 and 'I-'I Usually there isprovided with looms o'f this 'type a single vbearing which is disposed'on the lremote side of thevcrank throws 12 and 12' Vand therefore there l"wasnothing to support the middleportion 'of thejcrank'shaft 'and this resulted in vibrations'in the crankshaft thus vmaking A'it impossible to yspeed `up the pcksper kminute of 'the loom.4 'In special instances, there have been 'provided rcast members vhaving kremovable bearf ings 'secured thereto, thereA being 'one of lthese bearings disposed adjacent each 'side of each oi thecrank throws 12 and-12 of thecranks'haft 111i. Howeveigdue tothe fact thatthese bearingso'have `been removable `from thecast memben'therejhas been nojway "by Lwhich 'the bearings .could fbe faccuratelyalined longitudinally of the crankshaft.

of 'the'loom'with the result'that the bearings may vbecome worn unevenly throughout'their length, orinsomeinstances; may 'cause ridges or circular grooves 'in the 'crankshatl Ythus requiring Y,ref placement ofthe removablebearings or. the craiikf shaft or both vafter 'fbearings of this' type fhave been ins'tallecl`tfor a; 'relatively-short length o f time; AYL 'Ifh'e 'cast'beari'ng .unit TU Iatthe left-ih'and's'idc of Figures 'l'iand 3 being identical `togthe cast bearing unit 1U1'at the'right-handside of Figu$ lgzand fsywiththe exception lof being opposite hand,'fonly"the'oast .bearing'uit 10 appearing atftheriglit-"han'd sidedffFgures 1 and? w`i11 'be describedflik'e parts on'the v'cast bearing llunit I'li' bearing like -reference characters to thosega'ppe'aring on" the cast bearing unit '1IJ' with .the prime notation added. IReferring tov Figures `3 A,and 4 i-t may. loe-.ob-4 served that' the cast bearing .unit -1'0 Vhas afver-f tically disposed 'forwardly :and rearwar'dlyy extending portlon '8D .having ,a 1plurali-ty of irregu-l 'l'arly `spaced holes V'o'r slots 7ftherein -which are -tegral with the side frame member I adapted to be slidably penetrated by bolts 82 for securing the cast bearing unit 'I0 to the inner 'ver-tical surface of the side frame I0. The cast bearing unit l0' is, of course, secured tothe inner vertical surface of the side frame I in like manner. Disposed above the vertically disposed portion 80 and extending outwardly therefrom is an integral bearing block portion 83 the lower surface of which is machined accurately for mounting on an outwardly projecting portion 84 which is an integral part of the conventional side frame -member I0, there being a similar portion 84 in- There are many models-of looms which are not provided with the outwardly projecting portions 84 and 84' shown on the remote sides of the frame members I and in Figure 3. In this case, the bearing portions 83` and 83 merely extend outwardly beyond the remote surfaces of fthe side frames |0and Spaced apart from the bearing block portion 83-is ya second bearing block portion 86 having a vertical end wall 81 remote from the bearing block portion 83. The bearing block portions 83 and 86 have .alined semi-circular grooves 90 land 9| cut in their upper surfaces which are machined to accuratelyreceive semi-circular concavo-convex longitudinally extending bearing members 92 and 93, respectively. Figure 5 shows the manner in which the bearing member 92 is mounted in the bearing block-83 to prevent end wise movement of Vthe semi-circular bearing member 92. The semi-circular bearing 493 is mounted in the bearing block portion 86 in an identical manner and a showing of the same is not deemed necessary. It will be noted in Figure that the bearing block portion 83 has a locking member 85 of soft metal, such as bronze orvthe like snugly mounted therein which has a restricted portion 88 projecting upwardly ltherefrom. The vertical length of the portion 88 is less lthan the thickness of the bearing member 92 and the memberl92 Vis provided with a bore 96 which is adapted `to be slidably penetrated by the portion 88 whenthe `member 92 is placed in the. semi-circular groove 90 to thus prevent endwise movement of the member 92 in the bearing block portion83. The upper edges of the bearing members 92 and 93Yare machined accurately ontheir respective axes and it may be observed in Figure 4 that the bearing block portions 83 and 86 are provided with longitudinally extending right angularly cut grooves 94 and 95, respectively, whose top surfaces are disposed in a horizontal plane coinciding with the raxes of the bearing members ,92 and 9.3, there being one of the grooves 94 and 95 `at each side of the bear'- ing members 92 and `93, respectively, :the purpose of which will be later described.

The underlapping portion 65 at the inner side of the cast bearing unit has .a longitudinally extending keyway |00 out therein which is machined in accurate parallel relation tothe axes .of the bearing members -92 and 93 and is adapted to Aslidably receive a key IUI. Opposite ends of lthe gir-t member 55 are provided with longitudinally extending keyways |02 and |02' which are machined in accurate parallel alinement with each other and are cut in the lower surfaces of the end portions of the girt 55 and which are .adapted to slidably receive the key |0| when the lapping por-tion l65 is provided with a plurality of bores |03 rand the overlapping portion of the girt is provided with slots or openings |04 which coincide with the bores |03 in the underlapping portions 65 for slidable reception of the bolts 64,- heretofore described, which secure :the girt member 55 :to the cast bearing unitA l0. It may be noted in lFigures 4 and 6 that the ends of the gir-|5555 are provided with spaced pads |05, the vertical ends of which may be filed off when the girt V55'and the cast bearing units 'I0 and 'I0' are applied to looms whose side frames I0 and are not far enough .apart from each other to accommodate the girt 55 in its original length.

The cast bearing unit 10 (Figure 4) has an irregluarly curved portion |06 which extends between the bearing block por-tion 86 and the vertically disposed portion 80 and it also has a rear vertically disposed wall portion |01 which 'extends between the rear portions of the bearing block portions - l 83 and 86 and extends downwardly and is curved inwardly as .at |08 to lend rigidity thereto at its juncture with the veritically disposed portion 80. It is thus seen that the portions 80, 83,86, |016 and |01 define an openingv |09 through which the crank throw l2 is adapted to pass. e It will bev noted in Figure 4 that the cast bearing unit -|0 has horizontally disposed portions lll'and ||2 adjacent .the rear wall por-tion |01 and which'are provided with slots ||3 and ||4, respectively for supporting other conventional parts of the loom, not shown, such as the warp stop motion which is no-t pertinent to the present invention and, consequently, is not shown in the drawings. j

The upper surfaces of the bearing block portions 83 and 86 are machined accurately for reception of semi-circular caps ||6 and respectively,1 whose lower surfaces are also ma'- chined; "The bearing caps ||6 and are provided with longitudinally extending inverted semi-circular grooves |20 and |2I, respectively,

which are milled for accurate reception of longitudinally extending semi-circular bearing members |22 and |23, respectively, which coincide with the semi-circular bearing members 92 and 93 in the bearing block members 83 and 8 6, krespectively. It will be notedv that the bearing caps ||6 and are provided with longitudinally ex tending ridges |25 and |26, respectively, there being one of these ridges adjacent each side of the semi-circular grooves |20 and |2I,y respectively, and which are accurately machined parallel to and in the same horizontal plane as the axis of the semi-circular bearing members |22 and |23, so they may seat accurately in the cofinciding grooves 94 and 95 in the bearing block portions 83 and 86, respectively, thus insuring that the parts, when assembled, may be accurately alined.

The bearing blocks ||6 and ||`I are provided with outwardly projecting tab portions or flanges |30 and |3I, respectively, at each side thereof, each of which has a hole |33 therein, the bearing block portions 83 and 86 each having vertically extending bores |34 therein, there being one of these bores |34 adjacent each side of the semicircular bearing portions 92 and 93. The bores |34 coincide with the holes |33 in the bearing caps ||6 and ||'I. The holes |33 in the bearing cap ||6 and the holes |34 in the bearing block portion 83 are adapted to be slidably penetrated by bolts |40 for securing the bearing block portion 83 of the cast bearing unit I0 to the out not` provided Vwith the projectionsll `and B4.

Itis-manifest that `the bolts |40 Vwould then serve only-to secure the 'cap |76 tothe bearing block portion-83.

Bolts -|4| .slidably penetrate the -holes 133 in .thebearing cap |11 and the .bores |34 inthe bearingvblock portions Bof the cast bearingunit 10 `to thus secure the bearing cap on the bearing block portion 86. Y.

ReferringtofFigures and '1, it maybe observed that-the vsemi-circular bearing member i22 is mounted .in the groove V|211 of' bearing cap ||6zin amanner similar to that in which the' bearing member 92 is mounted in the block portion1183.

A .locking member |43 of .soft metaLsuch :bronze or thelike, `is snugly mounted in the cap U6 and has a. restrictedportion |44 projecting l,vziownvvardly therefrom. The 'vertical length of .the portion |44 is lessthan the thickness of the semi-.circular bearing member |22 and the mem- Y,ber `|22 is provided with a bore |45 which is ,adapted to be slidably penetrated Vby the portion |44 to prevent endwise movementof `the bearing member |22 inzthe capvl I6 when assembled. The

4bearing cap has a suitable .grease fitting |46- :threadably mounted therein and has a bore |47 .therein which extends between the grease fitting .andthe-locking member |43. The lockingmemberl43 has a hole |50 therein -through whichthe lubricant vmay pass from the bore .|41 into the larea defined by the semi-circular .bearing member |22. The bearing member l|23 is mounted `.in the lcap. ||1 in a manner identical to that shown for the bearing member 1|22and a, further description o f the same isnotdeemed necessary. The grease fitting associated with cap is indicated at |5| in Figure 4. The locking members 85 `and |43 also prevent lthe .semi-.circular bearing membersf92 and |22 from rotating with the crankshaft 1|. y

In order to insure the desiredY relationship bevtween the various machined surfaces on the cast bearingunit 10, a description of the manner in .which the various surfaces are machined isbe- .lieved to be in-order. -The initial surfac'ev'tol be machined is'the vertical side of portion 8|) which is adapted to engagethe inner side of the side frame'member |-0. The cast-bearing unit 'i0 is then placed in a suitable jig and ther upper surf lface vof the lunderlapped portion 65 is ma- `-cured to the upperv surfaces of thebearing Lblock portions 83 and in the-manner described, after v.which the semi-circular grooves and-B ,in .the cast bearing .unit 10 and-the semi-circular grooves |20 and |2| in the bearingcaps H6 and. iliare machined simultaneously'by the-useV ofa .single `cutting tool, -the axis of whichiwouldbe parallel 'to thesurfaces :83 and' 86 a :horizontal plane and parallel to the-.keyway |00. rin :a .horizontal plane. f .j

It has already been stated how the -endsof the girt members .55 v are vmachined and itis thus seen that accurate alinement of the bearing surfaces in .the cast bearing 'l0 .with the girt members 55 Vand-'vviththe lbearing surfaces in thevotherzof the cast -bearing'units 10' may loe-insured. It thus seen that I have provided a com'- .bination girt and crankshaft mounting for a loom comprising castbearing units to which .the

girt may be .removably secured before securing the cast bearing units tothe side frame members v.of the loom and the cast bearing unitsh-aving .bearings therein for rotatably supporting the crankshaft at oppositefsides of eachfofthe crank throws. Means are vfurther provided whereby accurate alnement of the various parts may :be .insuredupon these parts being assembledand the girt, of course, tends to lessen vibration caused by the various driven parts of tberloom.

yIn the drawings and specification there has been set tforth a ypreferred `embodiment of the in'- vention, and although specific terms are rem vPlytiji, .they are used lin a lgeneric and descriptive sense only, Aand notfor purposes of limitation, the scope-of the. inventionl being defined in the claims.

.rc1-aim:

.1. In a loom havingside frames and also hav.- ing .a crankshaft, .the said crankshaft having .a pair .of crank vthrows thereon, means for rotatably -mounting theV crankshaft between ...the side frames of the loom comprising a pair .of 4cast bearing units adapted .to be secured to the 'proximate surfaces of the side framesfthe cast beariingunits being provided with semi-circular bearing surfaces milled in their lupper extremities. said bearing surfaces being-disposed on thesame axis and being adapted tofrotatably receivethe `crankshaft on yeachsde ofthe crankthrows. bearngcaps removably securedto the upper surfaces of the cast bearing units andh-avingbear# ing .surfaces attheirlower extremities adapted Vto .coincide `with the bearing' surfaces in theupper extremities of the cast bearing units, theproximateends of the said cast bearing units having inwardly .projecting .portions integral therewith, each of the invrardly'projecting. portions being `provided with a keyway, a key adapted to `be slid'- ably mounted in the keyway, a girt adapted .to 'be secured at each end thereof to the upper surfaces of .the inwardly projecting vportions of the cast bearing-units, saidgirt having a keywayj'a't each end thereof disposed in coinciding relationwith the keyways in the inwardly projecting lportions of the cast bearing units -and being ladapted 'to slidably receive the upper portion of the correspending keys,.said vkeyvvays in the inwardlyprojecting portions of Athejeast bearing and in the opposite ends of .the girtvbein'g cut in accuratealinement withveach other to thus insure `accurate alinementof the cast 'bearing units with respect to each other. -1

2. .In alecm having Vside'frame members, 'each vof said side frame members .liavingan outwardly :theysaid .crankshaft comprising a pair of .cast

`bearing units, each Vof said cast bearing units .comprising a vertical portion, .an outwardly extending bearing block portion integral withthe 75 vertical portion vand having@ semi#circularbearing cavity milled therein, the lower surface of the outwardly extending bearing portion being machined and being adapted to rest on the outwardly projecting portion of the side frame of the loom, a cast bearing block portion spaced inwardly from the first-named bearing block portion and also being integral with the cast bearing unit and having a semi-circular bearing milled therein whose axis is in alinement with the other semi-circular bearing cavity, each of said cast bearing units having a front portion and a rear wall portion integral therewith spanning the distance between the first named and second named bearing block portions and defining an opening through which the crank throw at the adjacent end of the crankshaft is adapted to pass, bearing caps removably secured to the upper surfaces of each of the said bearing block portions to form the upper halves of bearings for rotatably supporting the crankshaft, means for lending rigidity to the side frame members of the loom in cooperation with the means for rotatably supporting the crankshaft comprising a girt member, underlapping portions at the proximate sides of the cast bearing units, said underlapping portions being adapted to underlap the opposite ends of the girt member, said underlapping portions each having a key extending longitudinally thereof and in exact alinement with each other, the overlapping ends of the girt member each being provided with a keyway, said keyways in the end of the girt being machined in accurate alinement with each other and being adapted to slidably receive the said key in the underlapping portions and means for securing the overlapping ends of the girt to the underlapping portions of the cast bearing unit, said keys in the underlapping portions of the cast bearing units being machined in parallel alinement with the axis of the bearing surfaces in each of the cast bearing units thus insuring that both of the cast bearing units and the girt shall be in accurate alinement with respect to each other.

3. In a loom having side frames and a crankshaft and said crankshaft having a crank throw near each end thereof, means for rotatably mounting the crankshaft in the loom comprising a pair of cast bearing units adapted to be secured to the proximate surfaces of the side frames, each of said cast bearing units having a pair of spaced bearing block portions cast integral therewith, each of said bearing block portions having a semi-circular groove milled therein, the axes of the said semi-circular grooves being in alinement with each other, said bearing block portions being adapted to rotatably support the crankshaft adjacent opposite sides of the crank throws, semi-circular bearing caps adapted to be secured to the upper surfaces of the bearing block portions to form the upper half of the bearing for rotatably supporting the crankshaft, a rigid member having its ends secured to the proximate sides of the cast bearing units and spanning the distance therebetween, the connection between the ends of the girt and the cast bearing units comprising a key and keyway extending longitudinally of the girt and bearing units.

4. In a loom having side frames and a crankshaft and said crankshaft having a crank throw near each end thereof,l means for rotatably mounting the crankshaft in the loom comprising a pair of cast bearing units adapted to be secured to the proximate surfaces of the side frames, each of said cast bearing units having a pair of spaced bearing block portions cast integral therewith, each of said bearing block portions having a semi-circular groove therein, the axes of the said semi-circular grooves being in alinement with each other, said bearing block portions being adapted to rotatably support the crankshaft adjacent opposite sides of the crank throws, semi-circular bearing caps adapted to be secured to the upper surfaces of the bearing block portions to form the upper half of the bearing for rotatably supporting the crankshaft, a rigid member having its ends secured to the proximate sides of the cast bearing units by a key and keyway connection and spanning the distance therey between and holding all of the bearing grooves in both of the bearing block portions in a straight line.

EDWARD F. BAHAN.

REFERENCES CITED rIChe following references are of record in the file of this patent:

UNITED STATES PATENTS

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