US1544998A - Overturning cage - Google Patents

Description

- July 7', 1925.

D.F.LEPLEY I QVERTURNING CAGE Filed Oct. 22, 1921 4 Sheets-Sheet i July 7, 1925. I 1,544,998

, I D- F. LEPLEY OYERTI-JRNINQ CAGE Fil'ed Oct, 1921 I 4 Sheets-Sheet 4 I l I I I I I I I I I r I l I I I I I I I I I I I I Patented July 7, 192,5

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DANIEL terms, 'os' qoivNiiLtsi/itts, PE'iINSYLVANIA.

Application fired. fict'ber 22,1921; semi No; 509,651.

ToaZZ 107K077?) it may concern: 7

Be'it known that LDANIEL F. LEILEY,- a citizenof the United States, residing at Coniiellsville, in the" county 'of'fiayette and 5' State Of Penns lvania, have inventede new in operatihg tin overturiiing eage or plti'tform in high speed hoists because 'of-tfhe poundingthz it has usually resulted from the abrupt or nearly 'ebiup't actuation ofstlie overturniilglparts. I

It is object of the present invention to provide a cage orhoist of the overturii i'i'i'g platform type with a'iheens for ihverting the said platform at aspeed which increases as the' cage or skip approaches the poiiit of discharge or delivery.

Another object is to'provide mechanism which will start the tilting or overturning oi" the 'plzttforni at a comparatively low speed, s'iid speedincreasing rapidly, the ac tioii being such as to elinihieteall pounding which would otherwise be iiijhrious to the ineeheiiisin. is j A further object is to provide a "skip or in which the overturning portion is substantially balanced when subjected to a, loitl, the stability being maintained by the use of a latchiiig' ine'cliztnisin ad'aptedto be released automatically;immediately fnibifto the overturning gic'tioiij I V; b

A further" objectis to {provide s cjsg'eeiskip the" overturning" p'ortibii of which" is bale-need so'that the inertia load is-reduced to thejn'iiniinuin' and is negotiated very slowly, no part of the operating iiie'ztns'being required to leave or jump zi'c'rossztg ap iii the structure cooperating tliereivit-h either while completing the iioriiial-hoist disteiiice or travelling" as the result 0i ii oveiivin'tl'; thereby avoiding the tremendous liziiiinie i ng fivhich is so destructive to other types of high speed hoists.

With the f regoingand other objects iii vie'iviivhic'h vvill 'appjear as the desoiiptioii proceeds; the inventieii resides in the c'oinbi elation and arrangement or parts and the details of construction hereii 'aifter described ans claimed, itbeing iiiider'stood' tli'it, Within the scope of b What is cleiihed; changes in the precise emboaiiiient of tee-invention shown can he made Without departing from the spirit of the invention.

In" the accompanying drawings the preferred form of the invention" has been shown.

. In saiddrawings- Figure I is 2i side elevation of a ship of the combination PlZLtfOfliIdllCl hopper type, the present improvements being combined therewith.- v

Figure 2 is a; front elevation.

Figure 3 is'fa vertical traIisver se section througli zi portion OLE-one. side of the tiltable' platforn'i' and adjzicent parts;

"Figure" 4 is" a section on line 44,' Figure 3. b

Figure 5 is a section oii line ure 4:.

"Figure-'6 is an enlarged side elevation of p'bft'ion of the ,tiltable platform; it's giidgeoii being hown in section. I

Referring" to the-figures by characters of referent-e designates the frame of the skip or c'zigeadiipted to travel 'on the guide rails iii-amine shaft, this frame being provided with the usiial or any prefer ed hoist mech anism s portiond-f which has been indicated generally at 21 Tothein'ner surface'of each sideoi the frame" l 'i's attached a. yoke 3 win-c111 isiiitegrall' With a plate 4- riveted or otherwise festeiied'to the frame 1. This yeke'has pa-rellelside's as shown in Figure i and is-openat the'top, the sides and hotto'm oft'h'eyok e being formed in their inner faces with acon'tinuous groove 6. l urth'ermore-es sli'o'Wn iii"Fig'ure-3 the sides ofth'e yoke "are taperedupwerdly,*this taper be? is v rsely of thew flie -sbove tliebottom thereof antl cohstitut'es a" ie'teining'means as will I be desribe'd"hereihztfter. v

In the type of ship illustrated there is provided a platform structure 9 having iiietzil'side' Wills 10w sash of which is seadapted wrest w-ithinthe' ieevear These III parts are assembled by inserting the gudgeons 1.6 downwardly within the yokes 3 so that the flanges 17 will slide downwardly in the grooves 6 until seated on the bottom of the yokes. The bolts 8 are then inserted so as to engage the tops of the gudgeons and prevent the parts from becoming separated. Secured to the plate 11 so as to extend partly around the gudgeon 16 is an arcuate rack 18 eccentrically disposed relative to the gudgeon and having its'lower end below and close to the gudgeon while its upper end is above and at some distance from the gudgeon.

The gudgeons 16 are so located that the platform is substantially balanced thereby, the entire load on the platform being likewise balanced so that the inertia necessary to be overcome in order to tilt the platform and its load is negligible. For the purpose of actuating the platform so as to tilt it there is provided an operating means including levers 19 fulcrumed on brackets 20 and extending upwardly from segmental eccentric gears 21 which mesh with the respective racks 18. Mounted on the upper ends of the levers 19 are wheels 22 connected by a cross rod or shaft 23and a latch 24 is adapted to engage this shaft so as to hold the gear 21 against movement relative to the frame 1 while the skip is in operation below the point of discharge. An operating lever 25 slidably and pivotally engages the latch 24 and has a wheel 26 designed to ride within a cam track 27 so as to disengage the latch 24- from the shaft 23 when the skip approaches the point of de livery. This latch and the mechanism employed for operating it constitutes in itself no part of the present invention but already forms the subject matter of Patent No. 1,363,985 issued to me on Dec. 28, 1920.

Fixedly mounted within the mine shaft adjacent the point where the load is to be delivered, there. are provided cam tracks 28 the lower ends of which are flared so that, as the skip approaches the upper limit of its movement the wheels 22 will be free to enter between the rails of the tracks 28. During this operation the wheel 26 will enter the cam track 27 and be shifted so as to disengage the latch 24- from the shaft 28. The cam tracks 28 provide a means for imparting a gradual swinging movement to the levers 19 as the skip travels upwardly and this movement will be such as to cause the cam gears 21 to actuate the racks 18. It will be noted that the racks and gears are so shaped and proportioned that a gradually increasing leverage will be exerted upon the rack 18 and the speed of rotation of the rack will be proportionately increased. Thus the platform 9 will be given the de sired tilting or overturning action without being subjected to an abrupt start but will,

on the contrary, be started gradually in its tilting action, the speed of tilting increasing gradually and being so timed that the maximum tilting movement will be attained when the skip is at the proper point of delivery.

Obviously with a structure such as described the objectionable pounding or hammering that has thus far been present due to the abrupt contact of operating parts is entirely eliminated even though the skip travels at a high speed and, therefore, the life of the mechanism is greatly prolonged.

Although the overturning mechanism has been illustrated in connection with a skip having a tilting platform, a hopper, and a chute extendingfrom the hopper it is to be understood that the improvements are not restricted necessarily to a skip of this type. .Vhere such a skip is used, however, the cam track 28 can be employed not only for operating the mechanism to tilt the platform 9 but can also be used for actuating a bell crank lever 29 employed for swinging the pivoted chute or gate mounted on the outlet portion 31 extending from the bottom of the hopper 32. This mechanism does not constitute any part of the present invention but has already been disclosed in Patent No. 1,304,? 841 issued to me on May 27 1919.

WVhat is claimed is 1. The combination with a movable skip frame, of a constantly balanced load supporting structure, and cooperating fixed and movable means in the path of and on the skip frame respectively for gradually overcoming the inertia of the load supporting structure and rotating it relative to the skip frame, the velocity of rotation increasing progressively as the skip frame moves toward its terminal.

2. The combination with a movable skip frame, of a constantly balanced load supporting structure, and cooperating fixed and movable means in the path of and on the skip frame respectively for gradually overcoming the inertia of the supporting structure and rotating said structure, said means maintaining a practically uniform speed of rotation of the load structure during the slowing down period of said structure while approaching its terminal.

3. The combination with a movable skip frame, of a tiltable structure, means for locking said structure normally against tilting, stationary actuating means, means movable with the frame for engaging said actuating means to tilt the structure at a gradually increasing speed during the movement of the frame, and cooperating stationary and movable means for automatically unlocking the tiltable structure prior to the tilting operation.

4. The combination with a movable skip frame, of a tiltable structure, an arcuate rack eccentric with theaxis of rotation of the structure, a cam gear engaging the rack, and fixed means for actuating the cam gear during the movement of the frame to tilt the structure at a gradually increasing speed independently of the speed of movement of the frame.

5. The combination with a movable frame, of a tiltable member carried thereby, an arcuate rack eccentrieally disposed relative to the axis of rotation of said member, an eccentric gear meshing withthe rack, and cooperating fixed and movable means for actuating the gear during the movement of the frame for tilting said member at a gradually increasing speed.

6. The combination with a movable frame, of yokes secured to the sides thereof and opening upwardly, said yokes constituting bearings, a tiltable structure within the frame,

' gudgeons extending therefrom and mount ed in the yokes, and means for detachably securing the gudgeonsagainst withdrawal through the open upper ends of the yokes.

7. The combination with a movable skip frame, of yokes secured to'the sides thereof and opening upwardly, said yokes having grooves in the inner faces of the sides and bottoms thereof, a tiltable structure, gudgeons extending therefrom and insertible downwardly into the yokes to be supported thereby, and flanges on the gudgeons for insertion into the grooves thereby to hold the gudgeons against longitudinal withdrawal from the yokes.

8. The combination with a movable skip frame, of yokes secured to the sides thereof and opening upwardly, said yokes having grooves in the inner faces of the sides and bottoms thereof, a tiltable structure, gudgeons extending therefrom and insertible downwardly into the yokes to be supported thereby,

and flanges on the gudgeons for insertion into the grooves thereby to hold the gudgeons against longitudinal withdrawal from the yokes, and means extending transversely of the yokes and above the gudgeons for holding said gudgeons against upward withdrawal from the yokes,

9. The combination with a movable skip frame and a constantly balanced load supporting structure carried thereby, of motion transmitting means upon and movable relative to the frame, fixed means for engagement by said movable means to actuate the same through a gradually increasing area during the movement of the frame toward its terminal, and means on the load supporting structure and cooperating with the mo tion transmitting means for maintaining the velocity of rotation of said load supporting means practically uniform during the slowing down period of said structure while approaching its terminal.

10. The combination with a movable skip frame and a constantly balanced load supporting structure carried thereby, of motion transmitting means movably mounted on the frame, fixed means for engagement by said movable means for gradually increasing the shift thereof during the movement of the frame toward its terminal, and means on the load supporting structure and cooperation with the motion transmitting means for maintaining the velocity of said load supporting means practically uniform during the slowing down period of said structure while approaching its terminal.

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

DANIEL F. LEPLEY.

Witnesses HERBERT D. LAWSON,

G. M. DAVIDSON.

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