US931035A - Mine-door. - Google Patents

Description

c. w. GARMAN.,

MINE Doon.

APPLICATION FILED JAN. 26, 1909. Patented Aug. 17, 1909.

asHEETs-BHEET 1.

c. W. GARMAN.

MINE DOOR.

APPLIUATIONVHLED 11111.26, 1909.

l1111111111611 Aug. 17, 1909.

S SHEETS-SHEET 2.

@y m un.. A

NVENTOR WITNESSES C. W. CARMAN.

MINE Doon. APPLICATION FILED JAN. 26, 19097.

931,035. ARemtented Aug. 17, 1909.

3 SHEETS-SHEET 3.

iiivirnn sfrafrns rariiur cierren.

CHARLES W. CARMAN, OF MOUNT HOPE, WEST VIRGINIA, ASSIGNOR OF ONE-HALF TO WILLIAM E. DEEGANS, OF GLENQI EAN, WEST VIRGINIA.

MINE-noon.

spcification of Letters Patent.

Fatented Aug. 17, 1909.

ppiicatio sied January 26, i909. seriai No. 474,341.

To all it may concern:

Be it known that I, CHARLES lV. CARMAN, a. citizen of the United States, residing at Mount Hope, in the county of Fayette and State of TW est Virginia, have invented certain new and useful Improvements in Mine- Dloors, of which the` following is a specification.

My invention relates to doors used in mines toV insure a circulation of pure air throughout the mine, said doors being placed in headings that would short -circuit the draft and prevent the air from reaching all parts of the mines. Heretofore the doors used for this purpose have either been opervated by hand, which proved expensive, or

when operated automatically possessed faults that prevented satisfactory working.

The object of my invention is the. provision of an automatic door opened' by the weight of the car when approachingit fromV either side and closed by a counter-weight when the car has passed the door, and con'- sists sl'iecitically of details of construction that will be described at length hereinafter.

In the drawings: Figures l and 1a are views of the interior of a mine tunnel showing the car track over which cars are transported, carrying the products of the mine, and with the mine door in position, Fig. 2, a cross-section V*of the tunnel showing the door curtain in elevation, Fig. 3, a cross-sec-Y tional view of one of the side posts of the door frame showing a fragment of the curtain iii position, Figs. 4 and 5, detail views of the lever for operating the curtain and its connections, and Figs. 6 and 7, `detail views of the track levers.

In the drawings similar reference characters indicate corresponding pai'ts in all of the views.

The mine tunnel indicated at 1 has. the railroad track 2 therein over which the products of the mine are transported and the automatically operated door to be hereinafter described installed therein. l

The door frame consists of the side posts and head piece t 'connecting the side posts.

5 indicates a roller secured to shaft 6 ournaled in boxes 7, secured to side-posts 3, and has a curtain 8 made of canvas or other fleXi ble material secured thereto and slidably mounted in channels 9 formed by strips l() secured to the posts, said curtain being strengthened and stiffenedby transverse slats or bars l1 of rigid material secured thereto and also riding in channels 9, the 1iowermost slot l1a being slightly longer than the` width of the curtain so as to positively limit the upward movement of the curtain.

12 indicates a cross-bar at the bottom of the eurtaiin 13 indicates another upright 4post rsecured adjacent to one of the posts 3, the shaft 6 being extended so that it is journaled on post 13 as well as the adjacent post 3, said extended end of the shaft having sprocket wheels 14 secured thereto.

15 indicates braces secured to posts 3 and 13, and 16 a shaft journaled on said braces `and having sprocket wheels 17 secured thereto and geared to sprocket wheels 14 by means of chains 18. 19 indicates another post secured to tunnel 1 at a short distance from the door frame and 20 a T-shaped lever fulcruined on said post and having its end provided with two pins 21, each of which is secured to one of the links of each of the chains 18.

It will be understood that when the lever is swung upwardly the roller 5 is rotated so that the curtain 8 is lifted and when it is lowered the roller is rotated in an opposite direction so that the curtain is lowered, the two chains workingindependently but both secured to lever 2O insures continuous working of the device vas should one chain be broken the other one will carry the burden until thel broken chain can be repaired or replaced.

'Ihe lever is actuated so as to raise the curtain by the instrument-alities hereinafter described and is returned in its lowermost position by means of weights 22 secured thereto. The mechanism for raising the curtain consists of rods 23 and 23aL secured to the two ends of the cross-bar 20LL of T-shaped lever 20, the rod Q3 secured to the upper end of the cross bar 20a being secured to a bar 24 supported by arms 25 secured to rock shafts 26,]'ournaled at one side of track 2, in plates 27 secured to two adjacent crossties 28. The bar 24 is made up of a number of sections secured to arms 25 and secured together between each pair of arms by means of turn buckles 29 so that the length of bar between each pair of arms may .be adjusted for the most effectual operation of the door.

3() indicates an arm secured to each shaft 26 and 31 a supplemental rail supported by means of links 32 secured to the free ends of arms 30, said supplemental rail extending above the rail of track 2 and having its free end extended at a distance as shown at 33 and loosely secured to the track rail as shown at 34 so that a car approaching the door Will run onto the rail 31 and by its Weight depress the extended ends of arms 30, thus rocking shafts 26 and with them swinging arms 25. This will draw the bar 21.1;` back from the door frame so as to swing the long arm of the lever 2O upwardly and through the instrumentality of chains 18 and the sprocket Wheels lll, secured to shaft 6, rotate the roller 5 so as to roll up the curtain 8. The rod 23a secured to the lower end of cross-bar 20a of lever 20 is secured to a bar 24;a on the other side of the door frame from the bar 24 and is supported by arms I f 25a secured to rock shafts 2Ga journaled on cross ties 28, said bar heilig also divided in sections secured together by turnbuckles not shown similar to the construction of bar 24. Shafts 26a are rocked by means of arms 30L secured thereto and connected to supplemental rail 3lEt by means of links 32a. rlhe adjacent ends of supplemental rails 3l and 31a are secured together by means of U- shaped strap 33.

It will be understood from the above description and an inspection of the drawings that a car approaching the door from either direction will depress the supplemental rail 3l or 31L and through the instrumentality of rock shafts 26 or 26a move the bar 24 or 24a aivay.from the door so that the rod 23 or 23il swings the long arm of the lever 20 upwardly, rotating the roller 5 and lifting the curtain 8 so that the car can pass through thedoor. After the car has left the supplemental rail at the other side of the door the Weight 22 pulls the long arm of the lever downwardly closing the door andy returning the other operating parts to their former position.

As the operating mechanism for the curtain is outside of the track rails the dangerv of injuring the animals, used in hauling ears',- by the mechanism is substantially eliminated.` lf, however, the cars are operated by trolley as is the case in the large percentage of modern mines I provide a bridge 34 for carrying the current over the break 34a in the line Wire provided for the curtain 8.

Having thus described my invention what claim isl. In an automatic door for mines, in combination With a tunnel, a track in the tunnel, a door frame secured in the tunnel, a roller journaled on said frame, a curtain secured to the roller, chain and sprocket gearing secured to the roller, a lever suitably fulcrumed and secured to said chain gearing, rock shafts journaled adjacent to t-he track, arms secured to said shafts, a bar secured to said arm, a rod connecting the bar and lever, other arms secured to the rock shafts, and a supplemental*rail secured to the last mentioned arms and positioned over one of the track rails.

ln an automatic door for mines, in combination vvith a tunnel, a track in the tunnel, a door frame secured in the tunnel, a roller journaled on said frame, a curtain secured to the roller, chain and sprocket gearing secured to the roller, a T-shaped lever suitably fulcrumed and secured to the chain gearing, the cross-bar of the lever having rods secured to its ends, rock shafts journaled at one side of the track, arms secured to said rock shafts, bars secured to said arms, the rods secured to the lever crossbar secured to the bars, one on one side of the door frame, the other on the other, other arms secured to said rock shafts, a supplemental rail positioned above one of the track rails, and links connecting said supplemental rail and the last mentioned arms.

In testimony whereof l hereto alix my signature in the presence of tivo witnesses.

CHARLES lV. GARMAN.

Witnesses D. B. HUNTER, G. H. NUGEN.

Images