US1805664A - Cast hopper door - Google Patents

Description

May 19, 1931. G. G. GILPIN 1,805,664

CAST HOPPER DOQR' Filed Jan. 27, 1928 2 Sheets-Sheet 1 Qorn/e May 19, 1931. G. G. GlLPlN CAST HOPPER DOOR Filed Jan. 27, 1928 2 Sheets-Sheet 2 Fig- 8 Patented May 19, `1931 eriierir e. Giiiriiv, or DivnitsiDii, iLDiNois, Assreiion 'reunion PRCDUCrsj Coli/rimini?,vor Ciliioaeo, iiiiiinois, A Coieroien'rioii or DELAWARE Casa: iiorralr. Doon AApplication filed January 2*?, 1928. Serial No. 250,003.

My invention relates to the construction ot railway cars having s, drop doo-rs, suoli as hopper cars, hopper gondola cars, d-ropbottom or general service gondola cars, mill type 5' gondolas, having drop end doors, or the like,

having a door forming" a part of the car for retaining the load` therein, which door is provided withl hinges adjacent one of its edgesand is capable of being dropped7 or swung 10A open. Y Any meansof raising the door to the closed position and any means for locking and releasing the door may he employed with my device. y A door for this purpose must be very 15 stro-ng and durable because:

First, itis apart of the licor of vthefcar and as such must sustainY the load as well as the impact blow of the load when the car is 'in motion. Second, the car is frequentlylload# 20' ed from chutes or tipples from a'heght of ten feet or more, causing the load to be dropped directly upon the doors. Third, clam shell buckets are frequently used toiunload such cars and itis not uncommonv for 251 these bucketsto rest upon and drag over the doors. Fourth, when the door suddenly comes to rest after being dropped, it is not only subjected toa seyere shock but it must sustain the severe impact thrust or" the load 310' which of course follows the door.

the load is theoretically equally distributed,

the door must be strong over. its entire area and must be capable of transmitting the resulting stresses to the car body without much i, deiiection and no substantial distortion.

Any bending of the door or drooping of the corners would cause a leak of the lading, especially of such linematerial as sand, chats, etc. Any bending ro-r warping might interi0 ere with the complete closing and locking oi"k the door.

An object of the invention is to provide a door o cast metal, preferably malleable iron o-r cast steel, having a. panel portion forming a floor or Wall of a car and to reinforce such panel with cast integral members and to ifoi'mV and shape the entire door so that it will not be deformed by warping when cooling, and furthermore, vwill eliminate shrinkage cracks and internal stresses.

inra, as f yBoth cast metal and annealed cast metal1 citer' greater resistance to corrosion (and similar chemical actions) than rolled steel,`

f owing tothe texture of the metal. `Wlien-A rolled steel is deformed between,V dies (whether heated or not) the fibres on the tension side or" the metal are opened-up or separated byv stretching, while thelibres; on tli'e compression side of the metal'a're forced'fto-A gethei and upset. vBothsnch openingiipl and upsetting actions 'disrupts the 'hoino- 'geneity ofthe ibres, thus permitting the entranceoii moisture therebetween and aug! inenting corrosion, therefore, anotlieirobject* is to provide a door more capa-ble" to resist@ corrosion. Railway ears'arel not onlysubject; tothe usual atmospheric conditions but are.' subject to chemical actionso certain loads, such as, for instance, wet coal' which forms sulpliuric acid;` l y ln the drawings: l Fig. il' showsa portionwith my ldeviceapplied thereon.

Fig. 2 is a,section:Onliney Q-Qof'Fitg. 1f- Fig'. 3" is a section oiilinejSl-of 'F ig. l.' f l Fig.y 41 is af detail of the' door yrioni the` undersiile.`

Figo is a section 'on line'Lo o'fFig 4.-., 'A Fig. 'G'i's a section4 online 6"-6'oii Fivv Figs. 7 and 8' are 'inodiiri'edforms' of vention. y l lncasting a door having aii'integral depending,` flange extending around all four of l its sidesg'the liquid steelisv j irefer'ably pouredthrough at plurality" of gates" into the vpanelf' portion ofl the doorffroiii whence iti flows into j the integral ii'an'ge. The ylo'vi'ier -portion ofthe of' ya railway' oar j flange, therefore, coolsl ir's't: andfoiiiers resist` is provided .which me'rges'into 'opposite porpanel portionu'iro'uld'.breakl one end (or may be both ends) oif'the *transversefrib away from? the integralflange or cause a rupture ofthev lower side of the transverserib.' These are panel. Sometimes these stresses are not sufficient to crack and sever the metal but cause internal (latent) stresses which when increased by a load imposed upon the door become sufficient to (and do) break the door.

To illustrate one adaptation of my device, I have shown a so-called general service7 vdrop bottom gondola car wherein the major portion of the floor consists of drop doors. The door openings are surrunded by the center construction 1, side wall 2 and cross diaphragme 3. In normal or closed position the door completely closes this opening and in fact is a trifle larger on all sides than the opening so as to provide a lap joint between the door and the car frame member. The doors are hinged to the center construction and are suj ported adjacent the side wall by the raising or locking mechanism. Any convenient stop may be used vto limit the downward movement of the door.

The cast metal door comprises a panel 5 with a continuous depending integral flange 6 rextending around all four sides of the panel. v Y

The door is provided with a secondary rib 7 crossing each corner with its opposite ends merging into the depending flange 6 and a veo primary rib 8 connecting two of the secondary ribs which may be on the same side of the door, as shown in Fig. 4l, or in diagonally opposite corners of the door, as shown in Fig. 8. y

The door may further be strengthened by 'reinforcing ribs 9 extending parallel with the primary ribs 8, as shown in Fig. l, or may extend angularly thereto, as shown in Fig. 7.

In order to prevent shrinkage in cooling from breaking the reinforcing ribs away from their adjacent members Iv prefer to form them on curves or to wave them, or broadly speaking, to form them in some other than a straight line.

In Fig. 7 the arcuate secondary ribs -20 are connected by arcuate primary ribs 21 and by arcuate transverse reinforcing ribs 22.

In Fig. 8 the arcuate secondary ribs 30 merge into the primary arcuate reinforcing ribs 31, which in turn, merge together adjacent the middle portion of the door. Y

The hinge lugs 15 are cast integral with the depending flange 6 and some of the reinforcing ribs preferably terminate into the panel adjacent'the integral hinge lugs so as to carryv their stresses to the hinges.

The accompanying drawings illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope of the claims will occur to persons skilled in the art.

In applications Serial No.-2l9,999; No. 250,000; No. 250,001 and No. 250,002, all

Leoaeea filed January 27, 1928, I have disclosed and claimed certain features disclosed but not claimed herein.

I claim:

1. A hinged door for a railway car consisting of an integral casting comprising a panel with a continuous flange adjacent its perimeter, a secondary rib crossing each corner with its opposite ends merging into the flange, and a primary rib connecting the secondary ribs on the same side of the door.

2. A hinged door for a railway car consisting of'an integral casting comprising a panel with a continuous flange adjacent its perimeter, a secondary rib crossing each corner with its opposite ends merging into the flange, and a curved primary rib connecting the secondary ribs on the same side of the door.

3. A hinged door for a railway car consisting of an integral casting comprising a panel with a continuous flange adjacent its perimeter, a secondary rib crossing each corner with its opposite ends merging into the flange, 'and a primary rib connecting the secondary ribs on the same side of the door, and other ribs connecting said primary ribs.

4. A hinged door for a railway car consisting of an integral casting comprising a panel with a continuous flange adjacent its perimeter, a secondary rib crossing each corner with its opposite ends merging into the flange, a primary rib connecting the secondary ribs on the same side of the door, and another rib substantially parallel to the primary ribs.

' GARTI-I G. GILPIN.

Images