US1874711A - Ore skip and the like - Google Patents

Description

Aug. 30, 71932. I RoBBlNs 1, 74,711

ORE SKIP AND THE LIKE Filed June 12, 1931 :jhven F or I I Robbins Patented Aug. 30, 1932 UNITED A E 1 m 4. ROBBINS, or HIGHLAIIVNV'D PARK, rumors 01m SKIP AND THE LIKE Applicatio filed. June '12,

This invention relates to skips, buckets or 1 other containers for the conveyance or eleva-' tion of ore fines or other materialsliable to stick-r accumulate in the containers. In the: '5 art of mining, for example, ore is transported through vertical shafts in skips and,-as the ore is usually damp or wet, fine particles of ore stick to and become compacted inthe bottom of the skip. These fines accumulate until the capacity of the skip is seriously reduced. When this occurs the skips must be stopped and cleaned by pick-and-shovel men which is a costly operation and involves serious delays in the operation of the mine. My object therefore is to devise means for preventing such accumulations.

I attain my object by providing the skip with a flexible bottom lining including enclosed air pockets, which pockets are comflpressible and expansible to cause the break up of deposits forming on the lining. A certain amount of compression followed by expansion is caused by the alternate filling and emptying of the skip, but I prefer to subject them to alternate changes of air pressure whereby they maybe alternately expanded and collapsed after the skip has been emptied of its readily dischargeable contents.

The changes of air pressure may be efit'ected by alternately exhausting air from the pockets and readmitting air at atmospheric pressure, by alternately introducing air under pressure and thereafter reducing the pressure, or by alternately exhausting air from the pockets and admitting air at more than atmospheric pressure.

The invention is hereinafter more specifically described and is illustrated in the accgnpanying drawing in which Fig. 1 is a side elevation, partly in section, of part of the skip elevating and dumping mechanism;

Fig. 2 a vertical section of a skip provided 1451' with a bottom lining constructed in accordance with my invention showing also its connection with the air conduit; and

Fig. 3 a perspective view, partly broken away, of the bottom lining. i In the drawing like numerals of reference 1931. "Serial No. 543,789.

At the dumping point a roller'fi ontheskip indicate corresponding parts in the different;

enters the grooved guides 7 and 8, which tip (it I the skip in a known manner as shown.

The skip itself is of ordinary form, being. rectangular in cross section, the bottom rounding intothe sides. Inthe bottom I is fitted the lining 9, which is shaped tofit the contours of-the bottom and has the inner. surfaces of its margins curved to meet the sides of the skip. This lining ismade of flexible materiah preferably rubber, and is formed withan' air pocket or pockets prefer-- ably intercommunicating. i W 1' In a preferredformthe lining isprovided- Y with a pocket 10 extending around it adjacent the margin andaplurality of pockets 11 inthe bottom portion communicating with one' another and the marginal pocket. j p The precise constructiomhowever, of the lining with its. pockets may be considerably varied. "The lining is secured in place. by. means of bolts 12 having their heads-imbedded inthe material of the lining.

In order'that'the air pressure within the pockets may be'varied at the time of dump ing, I provide a coupling spigot 13 at one side of the bottom, which communicates with the air pocket 10 and is adapted to enter a coupling socket 14, a washer 15 being provided to' make an airtight joint. 1 This socket; is shown as connected to a cross head 16. Connectedwith the socket 14.- is a conduit 17con nected with suitable means whereby the air pressure in the conduit may be'varied. It is evident that by varying the air pressure in the conduit the air pockets I0 and 11 may be alternately extended and collapsed, thus scaling off any deposits which may have accumulated on the surfaceof the bottom lining. While this operationmight take place while the cross head is stationary, it is customary after the skip has been turned. up-side-down 1 to hoist it ten or fifteen feet higher to give I super-atmospheric. The alternation of presthe finer particles a chance to loosen and fall out.

I take advantage of this movement to control the means for varying the air pressure in the conduit 17. For this purpose I provide a fouray valve 18 of any ordinary type and provided vviththe connection 19 for; con 7 nection with the conduit 17 the connection 20 leading to the atmosphere, the connection 21 for communication witha' source'pf airund'er' pressure. and the connection 22 for communication With exhaust apparatus. The valve is" actuated through the medium of; the-crank arm 23 connected to the valve spindle, the

"connecting rod 24:" connectinjgs the crank 23- sures satisfactorily accomplishes the object of my invention"and effectively loosensad herin'zo're massesfrom'the surfaceof thebot" tom lining. Itwill be understood, of "course, that if an under pressure is trapped inthe air pockets,' collapse a'nd expansion of' the air pockets would take place by the loading and;

unloading of-the skip; but'it is' preferred'td emplov other means such asdescribed to cf feet .the desired movements-"ofthef'surface of the bottom lining which the "ore contacts.

It vvill be noted that th eshape and arrange ment of the pockets is verv effective for the intended purpose; as"partsof' the surface Where accumulation is mostlilkely.to 'tal e place alternately presents a concave and a convex aspect astheai-r pressure'in-the'pock etsis changed.

' What I' cI'aim as'mv inventionis: I

p A skip providedwith aflexibl bottom lining having a closed-air pocket' formed therein, Whereby the'expose'd surface of the lininz'is deformableby variations in exter' nal or internal pressure. V A skip provided-Wither flexible 'bott o'm lining having a plurality'of' closed air pock ets formed therein, Wherebythe xposedsurface of the lining isdefo'rmable byv'ar'ia'tions inexternal or intern al pressure; I i

3.' A skip provided with a flexibleb ott omi lining having a plurality 'of intercomm'uni eating closed airp ockets formed therein, whereby the exposed surface of the lining is deformable by variations in external or in; ternal pressure. 1 m

A skip provijdedvvith flexible bottom hning of dished form having' a" closed pocket extending around it adjacent"the margin; 7

and closed pockets in the bottom portion communicating with one another and the mar-- ginal pocket, whereby the exposed surface of the lining is deformable byvariations in external or internal pressure.

5. A skip provided With a flexible bottom lining of dishedeform having.- a? closed. pocket extendinggaroundiit adjacent thegmargin; closedpockets in the bottom portion communicating with'one'another and the marginal pocltet,-Whereb-y the exposed surface of the lining is deformable by variations in external or internal pressure; and an air coupling member. in .communica-tlon wlth the air pocket in combination With an air conduit providdawithg a couplingzmember. adapted'eto couple withethe'coupli ng member aforesaid,

wherebytherairapressure Within the lining; maybe varied,;byvarying the airpressure i'm tl1e1air conduit, to deformtheexposedisurface;

of itheilininga Signeduat Ghicago,- Ill sthise2ndiday of.

A; PERCY A; mem

June; 1931..

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