US917321A - Car-door mechanism. - Google Patents

Description

c. A. LINDSTRM.

OAR -DOOR MEGHANISM. APPLICATION FILED AUG. 2a, 1908.

Patented Apry, 1909.

G. A. LINDSTRM.

GAR DOOR lISIIECHANISM. APPLIUATION FILED AUG. 2a. 190s.

Patented Apr. 6,1909. 2 sHBE'Ts-snsw 2.

Wim @son M @fym/ atteint earner rerun.

CHARLES. A. LINDSTRM, OF PITTSBURG, PEX' SYLYAXIA, ASSIGNOR TO PRESSED STEEL CAR COMPANY, OF PITTSBURG, PEXXSYLVAXIA, A CORPORATION OF NEW JERSEY.

- which the following is a description.

C-DOOR REGHANISm.

Patented April e, i909.

Application filed August 28, 19th?.y Serial N0. 450,611.

i suitable means at its ends or elsewhere toro- T o all 'whom it may concern:

Be it known that l, CHARLES A.' LrND- t 1 ings, is provided with a au' of chain windingf STRM, residing at Pittsburg, north side, county 4of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Car-Door Mechanism, of full, clear, and exact All object of the present invention is .to provide improvements in that class of door sheaves tate same. Shaft 5, as shown in the-dra w- 6 provided Wit acentral perforation 6a to receive the shaft 5, and perforations 6b to receive a pin for securing the sheave 6 to the shaft -5` and for securing the g chain to the sheave and shaft and a spirall guideway 6c extending substantially the ena rotatable shaft and doordiftin'g' chain are .Winding about theshaft is employed for rais-l employed.

to provide a specific form of `winding sheave the door.

A further specic object of the present in i vention is to provide an improved arrange-A ment ofthe chains relatively to the doors and the winding shafts Where a plurality of chains ing the door. A further object of the present invention is to provide an improved yielding connection for'the chain to compensate forstretching and Wear of the links and take up shock due to opening the door, and further to provide a'yield in the chain in the event of its door becoming jammed from lading or other causes.

The invention is clearly illustrated in the accom anying drawings in which like'reference 'c aracters refer to like parts, and in which:

Figure 1 is a plan view of a ortion of a car sufficient to illustrate the su ject-matter of my invention; Fig. 2 is a sectional side elevation of a Fi .1 on t e line 2 2, Fig. 1; Fig. 3 is a de- I ta' longitudinal sectional view of a ortion f the structure shown in Fig. 1 on t e line 3-3, Fig. l; Fig. 4 is a detail view of one of the devices Lcomprised in my invention; Fig. 5 is' an end elevation of the same; Figs. 6, 7 and 8 are three different views of another device comprised in my invention.

Referring now in detail to the drawings, l represents a car cross-bearer, 2 a suitably hinged drop door, 3 an elongated slot in the cross-bearer 1, 4 a slotted casting providing a. widened "bearing for the shaft 5 which is adapted to move bodily through slot 3 and casting 4. Shaft 5 is operated through any ortion of the structure shown in y .for said chain which also forms a door-sup- `porting connection between the lifting shaft i l 5. At the end of the she'ave 6 oppositeL the the door 2.

, ma'ming doors.

. tire length of sheave 6 up to a serrated ,roller operating mechanism for dump cars inwhich '7. 6d.

As mountedon the shaft 5, a pair of sheaves 6 for each drop door 2 are arranged with theiry serrated rollers 6d facing each other and with their spiral guideways 6c eX- tending toward the side edgesof the door.

7 is a chain secured at one end to 8 passed through perforationsb and the shaftserrated rollersd the opposite 'end of the chain 7 is connected to the door 2 by an eyebolt 9 passed through a perforation l()a in a shoe bracket 10 riveted to the underside of y Bracket 10 is formed with a serrated inclined raised portion or shoel 10b so formed on the bracket 1() as to be inline with the serrated roller 6d of the sheave 6. When the bracket `10 and the sheave 6 are secured in position the intermediate por-tion of each chain 7 is wound about the spiral guideway 6c of its respective -sheave 6.

11 are springs mounted on eye-bolts 9 between theA rear sides of brackets 10 and washers 12 on eye-bolts 9. The object of springs 11 is to provide against stretching of chains 7 by allowing the remaining chains 7 to give suiiiciently to insure Winding of a stretched chain or chains 7 on the lshaft 5. Springs 11 also permit of -further Winding of shaft 5 when one or more of the doorsbecomes obstructed by lading, to close the re- Again, springs 11 cushion chains 7 against injurious jars'or jolting due to sudden dropping of the doors upon dis. charge of the lading.

Assuming the parts to be in positions shown in the Figs. 1, 2 and 3, the shaft 5 is rotated in the direction of the arrow", Fig. 2, and is caused to lmove from beneath the door 2 by the action of the serrated roller 6 d on the shoe 10", the bottom of the shaft 5 sliding relatively to the lower edge of the slot 3. As this translation of the shaft 5 takes place the chain 7 is unwinding from the spiral guide- Way 6c toward-the end of the sheave 6 and the cross-bearer 1, and this unwindng con- I tinues as the doors drop after the ,shaft` 5 has facing each other and toward thecen'ter of the free edge of been moved from .beneath thenafI It will thus be seen that the major portion of the t chain 7 vis fed from a position toward the centhe' door gives support to the v door wherejmost needed, when in closed pcbinedvchain guide and sition, While the anchorage of the chain to the door at the 'peint indicated in the drawings gives support to the deer where most needed during its descent. lhe spring or cushioning connection between the door and shaft may be located at any place between said devices.

Having thus described my invention, the following is what I claim as new therein and desireto secure by Letters Patent A. 1.V In a dump car, the combination with' a drop door and a door-raising shaft, of a conrdoor-engaging y roller mounted en said shaft, a pin passed transversely through said roller and shaft and a cable secured at ene-,end to the door and at its opposite end to said pin. u

2.l In a dump car, the combination With a drop door and a bodily movableA shaft for raising said door, of a combined Wearing shoe and cable anchor rigidly mounted on. the underside ofsaid door, a combined door-engaging roller and chain guideunounted shaft, an eye-bolt passed through said roller to as great an extent as' on said.

tubular door-'engaging roller formed With a cable-engaging guide and having 'a transverse perforation, a transverse perforationin the shaft registering with the perforation in said roller and a pin passingthrough said roller and said shaft site end of said cable.

4. In a dump car, in combination With a drop door and a winding device, a Icable connected at one end to said Winding device and a spring' interposed between said door and cable andlocated beneath said door..

In a dump car, in combination with a drop door andra Winding device, a bracket located on-the underside of said doel-,a cable connected at one end to said winding device and secured to the oppoand a spring mounted on said bracket beneath the door and interposed betyveen said cable and door.

6. In a dumpI car, the combination of a drop door and4 door-raisingl shaft, a chain guide mounted on said shaft, apin passed transversely throu cable adapted to Wind on said guide and connected to said door.

The foregoing specification signed at Mc- Kees Rocks, Allegheny county, Pennsylvania, this V13th day of August, .1908."

' CHARLES A. LINDSTROM.

Witnesses: G. A. SCKFIELD,

B. FISHER.

h said chain guide and -a

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