US1228643A - Mine-door. - Google Patents

Description

A. BLEVINS, C. F. KILGORE 6L A. L. BLEVINS.

MINE DOOR.

A. BLEVINS, C. I'. KILGORE IL A. L. BLEVINS.

' MINE nooR,

APPLICATION FILED APR. 20. 1916.

Patented June 5, 1917.

2 SHEETS-SHEET 2.

'narran s'rarns aan ALONZO BLEVINS, CHARLES F. KILGORE, AND ALLEN L. BLEVINS, OF COEBURN, VIR- GINIA., ASSIGN ORS, BY DIRECT AND MESNE ASSIGNMENTS, 0F ONE-FOURTH TO SAID ALONZO BLEVINS AND ON 14E-FOURTH TO SAID KILGORE, AND ONE-FOURTH TO MASON L. JOHNSON AND `ONE-FOURTH TO JOSEPH J. BODY, BOTH OF DANTE, VIRGINIA.

Specification of Letters Patent.

Patented J une 5, 1917.

Application filed April 20, 1916. Serial No. 92,478.

To @ZZ whom t may concern.

Be it known that we, ALONZO BLnvrNs, CHARLES F. KILGORE, and ALLEN L. BLEVINS, citizens of the United States, residing at Coeburn, in the county of Wise and State of Virginia, have invented certain new and useful Improvements in Mine-Doors; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in mine doors of the type which are normally closed and opened automaticallyby the passage of mine cars over the track in the tunnel across which the door is positioned.

The object of the invention is to provide eflicient means for operating the door without employing a multiplicity of complicated parts.

With this general object in view, the invention resides in certain novel features of construction and in unique combinations of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented by the accompanying drawings which constitute a part of this application and in which:

Figure 1 is a top plan view of the invention with the door and its frame in horizontal section;

Fig. 2 is a side( elevation showing the door frame in section;

Fig. 8 is a vertical transverse section taken on the plane indicated by the line 3-3 of Fig. 2;

Fig. 4- is an enlarged section showing the manner in which the car wheels operate the depressible rails;

Fig. 5 is a detail vertical section showing more particularly the mounting of the main operating gears of the door; and

Fig. 6 is a detail longitudinal section through one of the depressible rails taken on the plane indicated by the line 6-6 of Fig. 1.

In specically describing the construction shown in the drawings above briefly described, similar characters will be placed on corresponding parts throughout the several views and reference will be herein 4made to the numerous elements by their respec-z A20 to the rails 1.

tive indices. To this end, the numerals 1 designate the parallel rails of an ordinary mine track, said track extending through a door frame 2 which is suitably secured in a tunnel or the like 3. A pair of upright shafts 4 extend between the upper and lower ends of the frame 2 and are rotatably mounted in appropriate bearings, said shafts carrying the two sections 5 of the door, which sections are normally disposed as shown in Figs. 1 and 3, The shafts Llare provided with beveled pinions 6 meshing with comparatively large beveled gears 7 which are mounted on bolts or the like 8 extending through spacing sleeves 9 and through the sides of the door frame.

Horizontal longitudinally disposed links 1() are pivoted to the gears 7 above the centers thereof, said links extending in opposite directions from the frame 2 and being pivoted at their other ends to the upper ends of rigid crank arms 11 which are secured to and rise from the opposite ends of crank shafts 12, said ends being mounted rockably in appropriate bearings 13 preferably secured to the rails 1. The cranks 14 ofthe shafts 12 are preferably formed by bowing the central portions of said shafts upwardly between said rails l, these cranks l being' normally inclined as shown by the dotted lines in Fig. 2 and supporting thereon the intermediate sections 15 of a pair of depressible rails, these rails being preferably constructed of angle metal as shown. The sections 15 are connected at intervals by transverse bars 15tL riveted or otherwise secured thereto.

Slotted plates 16 are securedto and project beyond the ends of the rail sections 15, said plates supporting thereon the inner ends of the end sections 17 of said depressible rails, said ends having headed studs or the like 1S passing through the slots 19 of the plates 16, whereby sliding and pivotal connections are established at these points. The outer ends of the sections 17 are pivoted at The intermediate sections 15 of thedepressible rails as well as the inner portions ofthe sections 17 thereof are normally raised above the rails 1 by coiled springs 21 disposed beneath the ends of said sections 15, whereby said rails will be always properly positioned to be operated by the 2 passage of a mine car thereovei. The cranks 1st are held in operative-relation in respect tothe depi'essible rails by the tension 'of coiled springs 22 connected at one end to the crank arms 11 kwhile their' other ends are anchored by any suitable means such as rods 23 having turnbuckles 24 for varying the tension of the springs 22. As shown most clearly in FigzpQ the springs 22 also serve to hold the gears 7 normally in proper position to retain the door closed, said-springs also exerting their tension to close said door when'fopened.

By construct-ing the invention in the manner sho-wn and described, the passage of a mine car upon'the depressible rails consist-y ing of the sections 15 and 17, will depressy said rails fromthe position shown in Fig. 3 'to that depicted in" Fig. 1. 'The result or this movement is that the shafts -12 are rockedbythe cranks 14h-this movement causing the crank arms 11 to so operate the` links 10 as totui'n the mainA operating gears 7, the latter now transferring motion tothe door sections 5 through the instrumentality of the lpinions 6. This opens the door and allows the cark to pass therethrough and when saidcarhas left the depressible rails and again travels onto the rails 1,' the springs 21 and 22 will return all'parts to their normal positions. Y It is-to be observed that both cranks 14 incline upwardly toward the doors and contact with the rails 15 at points spaced between Vthe rock shafts LZ and saiddoors. This structure yor an-equivalent arrangement is an important feature since` a car approaching the doors 1n either direc-r tion will open said doors in the direction in which said car is traveling' as indicated by the arrows in Fig. 1. By this arrangement, therefore, economy in space is had and the depressible rails need not be of such length as would be necessary if the toward an approaching car. 1t is also to be noted that when one crank 14 moves downwardly by the weight of a car traveling onto s the adjacent end of the railsl 15, the other crank rmust move upwardlyy to a slight yextent due to the inclination of said cranks.

This 'operation is readily permitted, however, byy th connectionsbetween the parts 15 and 17, said connections consistingfof the slotted plates Copies of this patentmay be obtained for doors 5 opened ,n

ing.

combined pivotal and sliding'y 16 and the headed studs 18shown` most clearly in Fig. 6.

From the foregoing, taken in connectiony with the accompanying drawings, the construction, manner of operation and advann tages of the invention Will be readily under f stood without requiring a more extended explanation. In conclusion, however, we will state that although certaink specic detailsy The combination with a railway and a Vdoor mounted to swing across the vsame, a

pair of operating links extending to opposite sides of said door, operating connections between said door and links for opening the former in either direction according to thc direction in which the links are shifted, a depressible rail passing beneath the door and disposed adjacent one rail of the railway, inclinedv rail sections at and in line with the ends of said depressible rail, said sections 1 being both pivotally andfslidably connected with the endsy of said depressible rail and being pivoted to said one rail of the railway, and a pair of rock shafts extending transversely of the railway on opposite sides of the door, said shafts having upstanding crank arms pivoted to the aforesaid links and additional cranks upon which the depressible rail rests, said rail bearing on said additional cranks at points spaced toward the door from said rock shafts whereby a car traveling in either direction will open the door in the direction said car is travel;

1n testimony whereof we have hereunto set our hands in presence of two subscribing` witnesses. s

ALONZO BLEVINS@y s CHARLES F. 'KILGORE ALLEN L. BLEVINS. Witnesses:

W. H. MOODY, B. Y. PERRY.

ve cents each, by addressing `the Commissioner of Patents,` 'Washingtoinin C.

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