US451716A - Hoisting device - Google Patents

Description

(No Model.)

WELTER.

HOISTING DEVICE.

Patented May 5,1891.

' tutor/m4 Nrrn STATES HOISTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 451,716, dated May 5, 1891.

Application filed January 27, 1891. Serial No. 379,291. (No model.)

To all whom, it may concern.-

Be it known that I, ISAAC CONRAD WELTER, a citizen of the United States, residing at Luzerne, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Hoisting-Machines;

and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

This invention relates to certain new and useful improvements in hoisting apparatus or devices to be employed in connection with an elevator for mines, designed primarily for use in a coal-shaft for the purpose of taking coal from the veins to the top of the breaker.

The invention has for its objects, among others, to provide a device for automatically controlling the hinged supports and for operating a latch that holds the car to the platform of the elevator. I provide pivoted camblocks, in the grooves of which the pin or projection on the elevator-car works, the said cam-blocks being connected with the hinged supports. The wings are so arranged as to form a support for the elevator-car when it reaches the desired height.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claims.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which Figure 1 is a vertical cross-section through the apparatus, with parts broken away and parts in side elevation. Fig. 2 is a vertical section through the line of Fig. 1, looking in the direction of the arrow. Fig. 3 is a top plan with the guides or uprights in cross-section and other parts broken away. Fig. 4 is a perspective view of the latch removed.

Like letters of reference indicate like parts throughout the several views.

Referring now to the details of the drawings by letter, A A designate the uprights or supports, between which the elevator-platform B is suspended in any known way, being guided by said uprights and arranged to be raised and lowered in any suitable manner; but as these features form no part of the present invention they have not been shown.

To any fixed support are pivoted the supports 0, pivoted on suitable pivots a and arranged to swing thereon at right angles to the uprights A, being pivoted at their lower ends, as seen best in Fig. 1. These supports are free to swing easily on their pivots and are under the control of the cam-block soon to be described, and with which theyare connected.

One of the doors is cut away at one upper corner, as seen at bin Fig. 2, for a purpose hereinafter made apparent.

D is a cam-block pivoted at c to a cross-bar or other support E upon the post A said pivot being arranged near the lower end of the cam-block, which is triangular in shape, as seen from Fig. 1, and is formedupon its inner face with the triangular groove or path d, (see also Fig. 1,) and parallel with and above the upper part of this path is another groove or path 6, (shown also in Fig. 1,) communication between the two parallel paths being provided by means of the pivoted switches F, arranged to open in opposite directions, the one at the upper end of the path designed to open upward and the other one designed to open downward, as shown by dotted lines in Fig. 1. Suitable springs should be provided to return the said switches to their normal position, which is closed, and hold them there after they have been opened in a manner hereinafter set forth.

The elevator-platform is strongly braced, and is supported from the timber B, to which the hoisting-rope B is attached, as seen in Fig. 1, and projecting from the side of the elevator-car or some of its parts is a rod f, which is preferably provided with a roller g, as shown in dotted lines in Fig. 3, which is designed to work in the groove of the camblock, as indicated in said Fig. 3 and also in Fig. 1. I sometimes propose to employ two of these cam-blocks, one upon each side, in which case there will be two of these rods, or it may be a single rod extended upon both sides, as may be deemed best; but as I consider this arrangement simply a duplication connected with the cam-block by means of rods or other analagous provisions g, as seen best in Fig. 1, one being connected with the cam-block below its pivot and the other above the same, as shown, so that the two doors or wings will be simultaneously moved in the same directionthat is, either inward or outward-as will be readily understood and the advantage and necessity of which will soon be seen. 7

The operation of this part of the invention will be readily understood upon reference to Fig. 1. When the elevator-platform is at the bottom of the shaft, the doors or wings assume the position indicated by dotted lines in Fig. 1-the innermost ones. As the platform nears the top of the shaft the projecting rod f engages the trian gulargroove of the camblock at the lower end, as seen in Fig. 1, and as the elevator-car travels upward the said rod, following the said path or groove, as indicated by arrows in Fig. 1, causes the camblock to turn on its pivot and as it turns the supports are thrown outward simultaneously into the position in which they are shown in full lines in Fig. 1, at which time the rod f has traveled the length of the inclined groove or path at the upper end of the cam-block, as indicated by arrows, and when it arrives at the end thereof, being unsupported, it falls into the vertical groove or path at the other side of the cam-block, as indicated by arrows; but as soon as it does this the cam-block, owing to the preponderance of weight being on the other side of its vertical line, falls slightly toward the right-hand side of Fig. 1, and the doors or wings, which in the meantime had been moved into the position shown by the outermost dotted lines, are drawn in into the position shown by full lines, and the platform stops in its downward movement and is sup ported upon said supports. The car upon the platform is then unloaded, and when all is ready to descend a slight upward movement of the platform causes the rod f to engage the switch F, which readily yields to the pressure thereon, as indicated by dotted lines in Fig. 1, and as soon as the rodf has passed the latch the latter is thrown back into its closed position, and then the rod f has to travel down the inclined path until it engages the switch Fat the other end, which readily yields downward and the rod f passes through into the downward groove of the cam-block, as indicated by arrows 111 Fig. 1.

As the rod f travels along the upper path or groove, the cam-block is tilted on its pivot in the opposite direction and the doors are thrown outward to allow the platform to pass, and then are drawn inward.

Upon the elevator-platform I provide any suitable means for locking the coal-car thereon during its movement of the platform up and down, and arrange means for automatically unlocking the same as the elevator-car reaches the top of the shaft.

I is the lever, which is designed to be connected with and operate the locking device,

which may be of any of the known forms.

This lever is pivoted at i on a vertical pivot and works between stops j on the upper face of the platform, as seen in Fig. 3. It haspivotally connected therewith, beyond its pivot, a lateral rod J, which works through aguide loop or staple 70, as seen in Fig. 3, and its outer end, which extends beyond the side of the platform, is turned at right angles to its length as seen in Fig. 3 and at. This is actuated automatically by the movement of the elevatorcar as follows:

L is an arm pivoted near its lower end to a support M, and between itsends pivotally connected with the cam-block bya rod or link Z, as seen in Figs. 1 and This arm has a horizontal extension, as seen bestin Fig. 4, which has an inclined upper face with a shoulder on extending horizontally and vertically, as seen best in said Fig. 4c.

N is a latch or gate pivoted to this exten sion and adapted to be held normally closed by aspringo, suitably arranged andconnected, as is common in the art. This arm L is arranged with its extension in the path of the bent end of the arm or rod J, as seen in Fig. 3, and as the elevator ascends, the car having been locked and the rod J drawn in to its fullest extent, the bent end of the rod retains its innermost position until after the rodf has traveled to the end of the bottom upper path 'or groove of the cam -block, but as it drops into the outer vertical path, as above described, then the bent end of the rod J travels down the inclined face of the extension of the arm M and the rod J and consequently the locking-lever to which it is attached is pulled out and the car thus unlocked. The pivoted gate or latch permits of the upward passage of the bent arm, as indicated in Fig.-

4 by dotted lines and in Fig. 2. Further movement of the cam-block swings the arm M or latch out of the way, as shown in Fig. 1.

What I claim as new is 1. The combination, with the elevator-car and its projecting rod, of the hinged supports and cam-block pivoted near its lowerend and formed with path in which the rod works, as set forth.

2. The combination, with the elevator-car and its projecting rod, of the hinged supports and pivoted cam-block having paths and pivoted gates or switches providing comm unication between the different paths, as set forth. 3. The combination, with the elevator-car and its projecting rod, of the pivoted camblock having separated paths with pivoted gates or switches at the end of one path, and the pivoted supports connected with the camblock, as set forth.

4. The combination, with the elevator-car and its projecting rod, of the pivoted camblock actuated by the said rod and the piv- I oted supports pivotally connected with the cam-block to swing simultaneously in opposite directions, as set forth.

5. The combination, with the elevator-car and the pivoted cam-block adapted to be actuated thereby, of the locking-lever on the elevator-platform, the rod connected therewith and having bent end, and the pivoted latch carried by a support connected with the cam-block and having inclined portion to engage the said rod, substantially as specified.

6. The combination, with the elevator-car, the pivoted cam-block; and the locking-lever and its rod, of the pivoted arm L, having inclined upper face and pivoted latch and connected with the cam-block, substantially as specified.

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