US373105A - Paekee steves - Google Patents

Description

(No Model.)

P. STBVES.

DEVICE EOE OPERATING THE DOORS OE MINE SEAETS. No. 373,105. Patented NOV. 15, 1887.

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PARKER STEVES, OF ASPEN, COLORADO.

DEVICE FOR OPERATING THE DOORS OF MINE-SHAFTS.

SPECIFICATION forming part of Letters Patent No. 373,105, dated November 15, 1887.

Application liled April 2D, 1887.

To all whom, it may concern:

Be it known that l, PARKER Sfrnvns, a citizen of the United States,residing at Aspen, in the county of Pitkin and State ot' Colorado, have invented a new and useful Improvement in Devices for Operating the Doors of Mine- Shafts, ofwhich the following is a specification.

My invention relates to an improvement in devices for operating the doors ol' mine-shafts; ,and it consists in the peculiar construction and combination of devices,that will be more fully set forth hereinafter, and particularly pointed out in the claims. i

In the drawings, Figure l is an elevation of an apparatus embodying my improvements, showing the doors closed. Fig. 2 is a similar view of the same, showing the doors open. Fig. 3 is a top plan view of Fig. 2. Fig. 4 is a detail View of one of the connecting-links.

A represents a platform,which is erected on one side of the mine-shaft. B represents the lcasing of the shaft, and C represents the doors, -Which are hinged at their outer sides and close together at their free edges, so as to close the shaft. v

D represents the frame,whieh is triangular in end elevation, and which supports the doors when the latter are closed.

To one end of the frameD is attached a pair of vertical guide-rods, E, which extend down through the platform for a suitable distance. l F represents a cross-head,which slides vertcally on the guide-rod, and is provided with downward-extending tubular sleeves G,which Work on the guide-rods. The central portion of the crosshead is arched, as shown, and from the upper side of the arch depends an eyebolt, H.

Each of the doors C is provided on its inner side, at one end,with a bracket-plate, I.

K represents a pair of links, which connect the ends of the cross-head F to the ears of the bracket-plates I. Each link is composed of a right-hand screw, K, the left-hand screw L, and a sleeve, M, which is interiorly threaded and adapted to receive the inner endsv of the screws in order to connect the same together. By turning the sleeve in one direction it will be understood that the screws will be moved from each other, thereby lengthening the link, and by turning the sleeve in the contrary div rection the screws will be drawn toward each Serial No. 236,00l. (No model.)

other and thereby shorten the link. By thus making the links longitudinally adjustable they are adapted to be so adjusted as to cause the doors to tit snugly together and upon the frame D when they are closed, so as to ell'ectm allyl close the shaft. Y

N represents a bell crank-lever, which is fulcrumed between a pair of knees or standards, O, that are bolted on the platform A. This bell-crank lever has ashort arm, P, and a long arm, R. The outer end of the short arm is pivoted to the lower end of a connecting-rod,

S, and the upper end of the said connecting` rod is pivoted to the eye of the bolt H by means of a bolt, T, and thereby connected to the cross-head.

U representsafoot-lever, which is fulcrumed on the same bolt or pin with the bell crank lever, the latter being provided with an opening at its fulcrum to receive the foot-lever, and the short arm of the saidV foot-lever is adapted to bear under the short arm P of the bell-crank lever, for the purpose to be hereinafter explained.

V represents a vertical seg1nent-plate,which is bolted on the platform A, and bears against one side of the bellcrank lever. segment-plate has a notch,V, formed in its upper edge at a suitable point.

X represents a spring-actuated locking-bolt, with which the long arm of the bellcrank lever is provided. The said locking-bolt is adaptedto engage the notch V, and is operated by a handle, Y,which is fulcrumed to the long arm ofthe bell-crank lever, near the upper end thereof.

The operation of my invention is as follows: When the upper end of the bell-crank lever is turned to the right, the short arm thereof draws downward on the connecting-rod T and causes the cross-head F to descend on the guide-rods, and as the cross-head is connected to the door C by means of the links K, it follows that the said doors are caused to close together and on the upper inclined sides of the frame D. Then the upper end of the bell-crank lever is moved to the left, the cross-head is caused to rise and thereby force the doors apart and open the same` and by the time that the long arm ofthe bell'crank lever has assumed a position alongside the notch W the spring-actuated vbolt X drops into the said notch, and

The said IOC thereby looks the bell-crank lever to the segment-plate, and consequently locks the doors in an open position, as shown in Fig. 2. The foot-lever serves to `aid the operator in moving the bell crank lever,e as it enables the operator to stand upon the outer end of the foot-lever, thus causing his Weight to be utilized in assisting to work the lever.

Having thus described my invention, I Clam-- 1. The combination of the doors C, hinged at their outer sides and adapted to close together, the vertically-movable erosshead, the links connecting the cross-head to the doors, and the lever to operate the cross-head and thereby open and close the doors,snbstantiall y as described.

2. The combination ofthe frameD,the doors G,liinged thereto at their outer sides, the vertically-movable cross-head F, longitudinallyadjustablelinks connecting the said cross-head to the door, and the lever to raise and lower the cross-head and thereby open and close the doors, substantially as described.

3. The combination of the frame D,thedoors 0,'hinged thereto at their outer sides and adapted to close together', the vertieally-lnovable erosshead, the links connecting the same to the door, the bell-crank lever connected to the cross-head, and devices, substantially as set forth, to lock the lever when the doors are opened, substantially as described.

4. In combination with the hinged doors C, the guide-rods, the cross-head moving on the guide-rods and having depending tubes to slide over the rods, the links connecting the crossliead to the doors, and the operating-lever, as set forth.

In testimony that I claim the foregoing as my own I have hereto afxed my signature in presence of two witnesses.

PARKER STEYES.

'Vil-xiesses:

CHARLIE PETERSON, DANIEL A. BRnEsE.

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