US1691873A

US1691873A - Railway car

Info

Publication number: US1691873A
Application number: US751260A
Authority: US
Inventors: Robert R Weaver
Original assignee: GEN AMERICAN TANK CAR CORP
Current assignee: GEN AMERICAN TANK CAR CORP; GENERAL AMERICAN TANK CAR Corp
Priority date: 1924-11-21
Filing date: 1924-11-21
Publication date: 1928-11-13
Anticipated expiration: 1945-11-13

Description

Nov. 13, 1928.

R. R. WEAVER RAILWAY GAR Filed NOV. 2l, 1924 Nov. 13, 192s.

R. R. WEAVER RAILWAY CAR Filed NOV. 21, 1924 9 Sheets-Sheet 2 4N/r L f w; d e T C E mm ww VIIIYlV mm LM. o A0 0. 0 o 0 o o a o O G 1./

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Nov. 13, 1928. 1,691,873

R. R. WEAVER RAILWAY CAR Filed Nov. 21. 1924 9 Sheets-sheet '4 ,y ml F NNN @QN um m, E E 1T QQ WQNW m WNW Nov. 13, 1928.

R. R. WEAVER RAILWAY CAR Filed Nov. 21, 1924 9 sheets-sheet 5 NOV. 13. 1928. Q 1,691,873

R. R. WEAVER RAILWAYCAR Filed Nov. 21. 1924 9 shets-sn'et e WEAVER 9 Sheets-Sheet '7 o Ze 2225125 RAILWAY GAR Nov. 13, 1928.

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RAILWAY GAR Filed NOY. 21, 1924 9 Sheets-Sheet 9 v the fluid to be transported.

Patented Nov. 13, 1928.

UNITED STATES ROBERT R. WEAVER, OF CHICAGO, ILLINOIS 1,691,873 PATENT OFFICE.

, ASSIGNOR TO GENERAL AMERICAN TANK CAR CORPORATION, or CHICAGO, ILLINOIS, A ooRronA'rIoN oF wEs'r VIRGINIA RAILWAY GAB- My invention relates generally to improvements in railway tank cars.

My primary objects are as follows:

To provide in a tank car, the floor of which is liable to have luid spilled thereon, for the proper draining of the floor as desired.

To provide in a car, and more particularly in a tank car having a box-like housing in which the tank is located, for the removaland replacement of the roof portion by a simple and quickly performed operation and without risk of damaging the car, in which structures it is sometimes necessary to remove the tanks from theI cars, as for example in the case of repairs to be made, in which case the tanks are lifted out of the housings, the roof portions of cars as at present constructed being intimately built into-the side walls of the housings rendering the operation of removing the roof a tedious and expensive one and oftentimes resulting in impairment of the structure.

To provide for the so positioning of the refrigerating pipes in refrigerating cars, that the tanks may be removed from, and replaced in, the car housings through their upper ends, without obstructionfrom the pipes and without requiring the disturbingof the position of the latter.

To provide in a tank car of such character, and provided for such use, that the temperature in the car be maintained unaffected, to as great an extent as possible, by outside temperature conditions, as for example in the case of cars the tanks of which are provided for receiving milk, for reducing, to 'as great an extent as possible, the affecting ofthe temperature of the contents of the tanks by outside temperat-ure conditions, while permitting of the ready charging of the tanks with To provide in a tank car, especially of the center-sill type, for` the so securing of the tank bands which hold down the tanks that they will not be required to be carried down through the floor of the car, thereby economizing in the cost of construction, facilitat vingv their installation and removal when desired, and producinga strong and highly resistant structure. To provide a novel and highly etlicient form of cradle structure for the tank of a tank car and its attachment to the under-frame thereof.

To provide in a tank car a novel and etli- 1, 1924. Serial N0. 751,260.

cially of a character employing a receptacle forming portion containing a bed of cushioning material in whichthe lower portion of the tank is embedded; and generally to improve upon structures of the general character above stated as hitherto provided, and to the end that the cost of manufacture and operation will be reduced. r

As a preface to the following description, it may be stated that I have devised my improvements for embodiment, more particula-rly in tank cars the tanks of which are 'provided with linings of glass or enamel for preventing injurious or contaminating effects upon the uid carried in the tanks, as for example milk, tlie tanks being retained in the desired anchored condition, 'i on the underframe of the car, by embedment at their lower port-ions in a bed of material of such a charact-er as to adhere to the' tank and present cushioning qualities, such a material, by way of example being what is known in the trade as coal tar pitch, having a. melting point of about 170 to 200o F., the tanks being located in housing structures comprising side walls and roofs; and I have, therefore, chosen to illustrate my invention in such a type of car, but without, however, intending to be understood as limiting my invention to embodiment 1n such a character of structure, as to those features whichmay be incorporatedin cars of other types.

Referring to the accompanying drawings:

Figure 1 is a plan view of a car of the type above referred to. Figure 2 is a plan sectional view of the car, the section being taken immediately below the roof portion thereof, at the irregular line 22 on Fig. 4, the tanks being shown in plan. Figure 3 is an enlarged view in longitudinal sectional elevation of one end of the car, the section being taken at the line 3 on Fig. 2 and viewed in the direction of the arrow. Figure 4 is a section taken 'at the line 4 on Fig..3 and viewe'din the direction of the arrow; Figure 5 is an enlarged elevationallviewy of a side-wall of the car, the roof portion being removed, viewing the side wall from the interior of the car, and showing one of the similar closure-equipped openings of the car, the view being taken at the line 5 on Figure 6, and -viewed in the direction lill of the'. arrow. Figure 6 is a broken section cient tank-supporting structure, and espebroken .sectional view taken at the line 7-,-7 llu Geflits- 5gand viewed in the direction of the arowsx Figure 8 is an enlarged fragmentary sectional view taken at the line 8 on Fig. 1 and viewed in the direction of the arrow; Figure 9 is a broken section taken at the irregular line 9--9 on Fig. 8 and viewed in the direction of the arrows; Figure 10 is a plan view-of the structure shown in Fig. 8, with the roof-proper removed. Figure 11 is a broken, enlarged, fragmentary sectional view taken at the line 11 on Fig. 1, and viewed in the direction of the arrow. Figure 12 is a y face view of one of the plurality of similar longitudinal, sectional, view of the structure shown in Fig. 13, the section being taken at the line 15 on 13 and viewed in the direction of the arrow. Figure 16 is an enlarged,

sectional, view taken at the line 16 on Fig. 18 and viewed in the direction ofthe arrow.

Figure 17 is a fragment-ary, longitudinal, sectional view of the cradling structure and the tank therein and taken through the discharge outlet of the tank, the valve control for which is omitted. Figure 18 is a plan sectional view taken at the lines 18 on Figs. 4 and 16, and

' viewed in the direction of thev arrows, this view showing a detail ofthe Valved discharge out-let ofthe tank. Figure 19 is an enlarged, broken plan sectional viewC of the valveequipped outlet of the tank. Figure 2() is a fragmentary View, in vertical sectional elevation, of the inlet opening of the tank, the section being taken at the line 20 on Fig. 4, and viewed in the direction of the arrow; and Figure 21, an enlarged, sectional view taken at the line 21 on Fig. 4, and Viewed in the direction of the arrow, showing means for illuminating the interior of the tank.

The particular construction shown involves an under-frame.illustrated more especially in Figs. 3, 4 and 14, and of the fish-belly centersill type, the center-sill'being represented at 25 and extending longitudinally of the underframe from end to end thereof. This frame in addition to the center-sill 25 comprises cross-bearers 26 arranged at different points along the center-sill 25 and the body holsters 25a located towards opposite ends of -the frame. The particular construction of centersill shown which is of hollow form, comprises the side walls 27 spaced apart and formed of plates 28 provided at their upper and lower edges with angle bars 29 and 30, respectively, rigidly secured thereto, and a plate 31 eX- tending across the upper ends of the side walls 27 and resting upon the angle bars 29 to which they are secured, as by rivets represented at 32. The underframe shown is supported on wheel trucks the wheels of which are represented at 233, the form of under-frame shown being of well-known construction. The structure also comprises a platform or floor portion represented generally at 33 which, ex-l cept for certain of its portions as hereinafter set forth, is of common construction, this floor portion 33 being superposed on the underframe and secured thereto in any desired manner, as for example in the manner well known in the art.

The particular construction of car shown involves the incorporation therein of two of the tanks of the general type above referred to, these tanks represented atl 34 and which are of elongated form and circular in cross section being shown as located at opposite endsof thecar and at the sam'e distance from the center thereof.

The particular construction of means shown for anchoringthese tanks in position comprises, for each tank, a bed of material located in a receptacle and in which the lower porti-on of thel tank is embedded in spaced relation, at its ends and underside, to the receptacle, the material referred to thus opposing the ends and underside of the tank an d forming anchoring Ameans cushioning the tank against lengthwise movement thereof in the receptacle. The material employed is preferably of such character that upon positioning this bed material and the tank relative to each other the material sets sufficiently to present the cushioning anchorage referred to, as for example, that hereinbefore referred to. The receptacles referred to are represented generally at 35 each comprising a metal, preferably steel, box-like rectangular frame 36, shown as formed of sheet met-al with its lower edges outwardly hanged, as represented at 37. The end wall of each re- Ceptacle adjacent the center of the car is formed with a downwardly and inwardly extending port-ion 38 which extends, as shown` to a point below the upper portion of the platform 33 and is secured at a flange 39 to the underlying steel plate-portion 31 of the center-sill, both ends of each frame 36 being reinforced with angles 41 at their upper edges. Each receptacle 35 also comprises a sectional curved bottom-forming portion, the curvature being cross-wise of the receptacle and the sections, which are represented at 42, 1ying at their upper edges against the upper curved portions 43 of the sides of the frame 35 and upon the flanges 44 of curved anglebars 45 secured to the end walls of the frame 35 to which angle-bars they are secured byl rivets 46. The sections 42 are spaced apart as represented in the drawings (Fig. 14) and lll at their'inner edges are providedwith dependthe plate 31 at the edges of the latter and to which they are secured by the rivets 32. Thus assembling the sections 42 ,with the centersill causes the structure to present a channel planks 50a located in the Achannels 49 being preferably provided on their upper surfaces with cushioning insulating material 50", as for example, wool-felt, and upon which the tanks directly rest, and in order that the'tanks may incline downwardly toward the center `of the car, the blocks 5() are of progesssively less thickness from the ends of the car toward the center thereof, as shown (Fig. 15).

It may be here stated that in accordance with the preferred embodiment of my invention, the cushioning material above referred to in which the tanks 34 are embedded, and represented at 51, is poured in heated condition into the spaces provided between the ends and undersides of the tanks and the opposed surfaces of the cradling-receptacles, and upon cooling becomes adhered to the tanks and forms a cushioning' anchorage therefor. l

Preferably tank-bands, represented at 52, are provided, these bands partially encircling the tanks at their upper portions, and anchored at their. lower, lug-equipped, ends 53 preferably to lugs 54 on the receptacle-frames 35, as by bolts 55 engaging the

lugs

53 and 54 as shown.

Each tank 34 is provided at the upper portion of the end-wall thereof nearest the center v of the car with an inlet 56 from which leads a short pipe-section 57, secured to the tank 34 and terminating in a threaded portion 58, the pipe 57 being also lined with glass, or enamel, as represented at 59. The threaded portion 58 of the pipe 57 forms means for securing to this pipe, a closure-cap (not shown) or a pipe for directing the fluid into the tank. In the arrangement shown the inlet-pipes 57 for the two tanks 34 are shown as connected\together by a lling pipe-section 60 .nating in threads 78.

to, in the sidesof the car. Where the pipe 60 is rotatably mounted, as described, a pipe l,67 at oneonly, of the

openings

64 and 65, need be employed, as by rotating the pipe 60, the pipe 67 may be caused to extend toward either side of the car, as desired.

Each tank 34 is provided at its lower portion near the end thereof adjacent the center of the car, with an outlet 68 communicating Iwith a pipe 69 equipped with a valve 70, which may be of any desirable construction, that shown comprising a casing 71 secured to the pipe 69 and presenting an inlet-passage 72 containing a seat 73 co-operating with a valveproper 74 the stem of which, represented atl 75, is threaded at 76 at which it engages internal threads on 'a hollow plug 72a screwed into the outer end of the passage 72, the valve being opened or closed by turning the stem75. as by the handwheel thereon. The passage 72 communicates with a passage 76 extending at an angle thereto and opening into a passage 77 shown as extending parallel with the passage 72 the outer end ofthe portion 77 termi- The passages 77 of the valves for each tank are directly o posed and are connected together by a pipe 9, which is shown as rotatably connected with the valvepassages 77 of the two opposed valve-structures, in the same manner as explained for the connections between the pipe 60 and the pipesections 57, the. pipe 79 containing a coupling 80-like the coupling 63 with a plug 81 and pipe-extension 82 as explained of the coupling 63, the outer end of the pipe 82 being threaded for attachment thereto ofa pipe, or hose-line, (not shown) for conducting away from .the tanks 34 the contents of the tank or tanks, to a storage-tank, or 'other receptacle (not shown) as desired.

Eachl tank 34 also contains at one end a manhole, equipped with a removable closure represented at 83, and shown as hinged at 84 -to an end-wall of the tank and releasably held in closed position by clamping nuts 85 on studs 86 secured to the said wall.

Each tank is also equipped with means for4 agitating the contents thereof vwhich coniprlses a motor 87 mounted on the outside of the tank andl having driving connection with a propeller-device (not shown). located in the interior of the tank; and also 'with a thermometer device, represented at 88,"fo'r indiliu eating the temperature 0f the contents of the tank and comprising a thermometer-tube 89 such as commonly provided, mountedto extend exteriorly of the tank and co-operating with means (not shown) extending into the contents of the tank, whereby the tempera.-v -ture 'of such contents is communicated to the thermometer tube 89.

Provision is also made for viewing the contents of the tank, as desired, these means comprising a peep-sight 90 in one end of the tank and located Anear its top surface and to one liti' side of the longitudinal center line of the tank, and an illuminating device 91 in the same end of the tank and at about the same level as the peep-sight but at the other side of the center line of the tank. The device 91 is shown as comprising a threaded tubular member 92 extending outwardly from the tank and opening into the interior of the tank, with the glass, or enamel, lining 95 of the tank covering the inner surface of the member 92.g

A transparent plate 96, as of glass, extends across the outer end o'l' the member 92 and is held in place between ,the latter and a reliector-membcr 97 by a sleeve 98 intel-locked with an annular iange 99 on the reflector-member 97 and screwed on the outer end ot' the member 92. The reflector-member 97 contains an opening 100 in which an electric lamp socket 101 is secured, the lamp located in the socket 101 and represented at 102 being located in the reflector-member 91 and on the outside of the transparent plate 96. f

By disposing the illuminating device as described and shown, those portions vof the tank which are within the range of Vision of one looking through the pcepsight 90, are so illuminated, as to permit such portions, as also the tank-contents, to be readily seen and visually inspected.

The housing' structure for the tanks 34 comprise end and side-

walls

103 and 104, respectively, a-nd a roof-portion 105, the wall-

portions

103 and 104 being built into each other and into theplatform portion 33 ot the car as is common in refrigerating cars, these wallvportions being of plural-wall construction with spaces therebetween containing any suitable thermal insulating material. The

'sidewalls 104 at the central portion of the ear contain the usual large door-openings 106 equipped with doors 107 and above these dooropenings, with smaller openings 108 equipped with removable closures 109 shown as in the form of tapered plugs having hand-grips 110 on their outer surfaces and retainers for holding them in place shown as in the form of bars 111 pivoted at 112 on the body of the side-wall adjacent each opening 108 at opposite sides thereof and adapted to be swung into and out of a position in which they overlap the mar-- ginal edges of theplugs 109, ringsv 113 of thermal insulating material being provided about these plugs. I

The side and end walls 104 and l103 are provided along their upper edges with side and end plates 114 which together form a rectangular' frame l115 built into the spa' ed wall-forming portions et these walls." 'lhe roof-portion 105 of the housingis likewise formed ot a rectangular frame 116 of substantially the same size and sh pe as the frame 115 and comprising side plates 117 suitably connected together at their en ds, the frame 116 resting upon the frame' 115, pref- Leereve erahly with thermal insulating material represented at 115, interposed therebetween. 'lhe trame 116 is provided at intervals along its inner surfaces, at itsl sides and ends, with cleats 118, those at the sides of the car being located between adjacent carlins 119, as shown in Fig. 10, the cleats 118 which extend inwardly beyond the side plates 114 and 117 being rigidly secured to the frame 116 by bolts 12() extending through the side plates 117 andthe cleats 118. The frame structure thus presented has secured to it the roofproper represented at 121 and the ceiling 122 spaced from the roof-proper-121 to provide air-spaces with thermal insulation interposed therein, the ceiling 122 being secured in place as hy nailing it to the carlins`119. rlhe root' portion 105 at its eleated portion is provided at intervals with vertically-disposed holte: 123 having square upper ends 124 at which they extend into square openings 125 in the cleats 118, these bolts passing vdownwardly through the cleats 118, the ceiling 122 and through the horizontal flanges of angleelips 126, the nuts 123a of these bolts bearing againstthe undersides of the angle-clips 126. Plates 128 resting on the upper surfaces ot' the cleats 118 and secured thereto by bolts 129 and extending across'the upper ends ot' `the bolt-s 123 prevent upward displacement of the latter in the applicationot' the roof-portion 105 to the side and end-wall portion of the car. tioned at intervals in the angular spacesbetween the end and side-

walls

103 and 104 ot the car and the ceiling 122 are connected with ,the side plates 114, the inner surfaces of which they overlap. by means of bolts 130 which extend through the side plates 114 and the depending flanges of the angle-clips 126.

Provision is made for retrigerating the car, these means comprising refrigerating coils 131 i'or any suilahle lrlrigeral ing medium, as i'or example ammonia. arranged along the inner surfaces ol` the. side-walls 104. The coils 131 at euch sido ol`l (he var are connected together at their lower ends hy pipes 132 ex- The angle-clips 126 which as posi-k tending helow the platform 33 and'prorided with lillng and draw-oil valves 133 and at their upper ends. through couplings 134, by cross-over pipes 135. I

The platform 33 of the car is built-up,.as shown in Fig. 14 at 136, throughout its area, except' Jfor those portions thereof which are covered'hy the receptacle-structures 35, to cause the upper surface of the lplatform to slope from all directions toward a sump 137 formed in the platform 33 adjacent the deflected portions 38 of the end walls of the r ceptacles 35 the edges of the built-up portions of the platform, inclining upwardly as shown for the purpose of draining to this sump such fluid as may become spilled upon the platform. `The bottom of the sump 137' contains an opening 138, whichis provided with a plug-valve 139, and communicates with a drain pipe 140.

The car is also shown as equipped with flushing-water supplying means, comprising -a tank 141 having an inlet for compressed air supplied to the tank 141, through a pipe 142, from any suitable source, the tank 141 containing a pipe 143 opening at' its lower end into the lower portion ot the tank and leading at its opposite outlet end, at which-it is equip d with a valve144, to a position central o the car. Y

As regards the use of the car for conveying luids which it is desired be maintained at a giventemperature, as for example, a relatively low temperature, as inthe case of milk, the provision of the relatively small openings 108 in the sides of the car, is of great advantage, inasmuch as it avoids the necessity of maintaining the large side doors of the car in open conditionduring the filling of the tank or tanks 34, thereby reducing to the minimum, the heating of the contents of the car by access thereto of the atmosphere, it being understood that the provision of the small openings at opposite sides of the car enables the tanks to be filled` from either side of the car, the pipe' 60 being rotated to cause the pipe 67 to extend at. its outer. end adjacent either one of the small openings as desired, as represented by the full and dotted lines in Fig. 4.

Another feature of advantage lis that of providing the roof portion of the car as a section readily removable and replaceable on the side wall-forming portions of the car, it

being understood that the roof portion may be quickly released for removal by unscrewing the nuts on the lower ends of the bolts 123. By such an arrangement of parts, the roof portion may be readily removed and replaced without dismantling any of the parts of the wall-forming portions of the car, to

permit the tanks 34 to be bodily lifted, as by ready attachment of the lifting device-.to the cranes, out of the car-housings, and replaced therein as desired, it being understood that the piping located directly above the tanks would be first removed. 'To provide for the roof-portion 105, as -for example, the .lifting element of a crane, the root-portion 105 is provided at intervals with upwardly-extending apertured vplates145 secured thereto asby bolts 146.

Furthermore, a' car embodying my improvements is exceedingly strong in construction, sanitary, readily repairable, when necessary, is particularly adaptable for the most eiicient anchoring of' the tanks without danger of impairment thereof, and generally Y is .suitable to a high degree to fluid trans,

portation,v especially forv the transportation of'milk.

Y While'I have illustrated and described a particular construction embodying my improvements, I do not wish to be understood as intending to limit my invention` thereto, as the same may be variously modified and altered, without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is:

1. In a tank car, the combinat-ion of an under-frame comprising a center-sill structure, a unitary cradling structure having a centrally-disposed depending portion superposed on, and`connected with, said center sill, a platform carried by said underframe and extending beneath the side portions of said cradling structure substantially to said depending portion, a tank mounted on said cradling structure, and a tank band engaging said tank and connected at its ends to said cradling structure.

2. In a tank-car, the combination of an underframe, a cradling receptaclestructure carried by said underirame, a tank mounted in said cradling-structure, a bed of cushioning f material interposed between said tank and said cradling-structure and yadhering to said tank, and a. tank-band engaging said tank and connected at its ends Ito said cradlingstructure.

3. In a tank car, the combination of an under-frame, a housing structure mounted on said under-frame, a cradling-structure connected with said under-frame and extending in said housing, a tank mounted on Said cradling structure and located in said housing and receiving support'by sides of saidhousing, and a tank band engaging said tank and connected at its ends to .said cradling structure.

4. In a tank-car', the combination of its underframe, a receptacle mounted on the underrame, a tank extendingv at its lower portion into said receptacle, a rest for the tank, cushioning material interposed between said tank and said rest, and a bed of cushioning material in said receptacle and in which the lower portion of said tank is embedded.

5. In a tank-car, the combination or" its underframe, a receptacle mounted on the underframe, a tank extending at its lower portion into said receptacle, a rest for the tank, cushioning insulating material interposed between said tank andsaid rest, and a bed of cushioning material in said receptacle and in which the llower portion of said tank is embedded and to which said tank is adhered.

6. In a tank car, the combination of an underframe formed of a center-sill structure, a cradling-structure mounted on Said under- Aframe and superposing, and connected with, said center-sill structure, a tank extending at its lower portion into said cradling-structure, and afloor carried by said underframe and located below and under said tank, said floor comprising supportin \members connected with said center sill an extending wholly-below the upper surface of said center sill.

7. In a tank-car, the combination of its nnderframe, a separate receptacle cradlingstructure mounted thereon and comprising a rest which is supported on said underframe directly above the median line of the underframe, and a tank extending at its lower portion into said receptacle and mounted on said rest. v

8. In a. tank-car, the combination of its underirame, a separate receptacle cradlingstructure mounted thereon and comprising a rest which is supported on said underframe direct-ly above the median line of the underframe, a tank extending at its lower portion into said receptacle and mounted on said rest, and a bed of cushioning material-n said receptacle and interposed between the walls of the latter and said tank.

9. In a tank-car, the combination of its underframe comprising a center-sill structure, a separate receptacle cra-dling structure mounted on said underframe with a portion thereof su'perposed on,and connected with, said center-sill structure and comprising a rest which is supported on, and located directly above, said center-sill structure, and a tank extending at its lower portion into said receptacle and mountedy on said iest.

10. In a tank-Car, the combination of its undert'rame comprising a center-sill structure, a separate receptacle cradling-structure mounted on said underframe with a portion thereof superposedon, and connected with, said center-sill structure and comprising a rest which is supported on, and located directly above, said center-.sill structure, a tank extending at its lower portion into said receptacle and mounted on said rest and a bed of cushioning material in said receptacle and interposed between the walls of the latter and said tank. y,

lLInl a tank-car, the combination of an under-frame, a separate receptacle-orming structure thereon, said structure being dopressed, at its lower portion, a rest in said depression, and a tank extending 'at its lower portion into said receptacle and mounted on said rest.

12. In a tank-car, the combination of an underframe comprising a center-sill structure, a receptacle-formnig structure on said underframe, the bottom wall of which is formed of sections having downwardly-extending spaced-apart portions which .superpose said center-sill Structure and are oonnected therewith, a rest superposing said center-sill structure and located between said depending portions, and a tank extending into said receptacle and mounted on said rest.

13. In a tank oar, the combination of an under-frame formed of a center-sill structure, a cradling structure mounted on said underframe and superposing, and connected with, said center sill structure, 'a tank extending at its lower portion into said cradling structure, and a floor carried by said under-frame and located below and under said tank, said Hoor comprising supporting members connected with the sides of said center-sill and extending wholly below the surface of said center sill.

ROBERT R. WEAVER.