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US2801035A - Power-operated loading gate for centrifugal machines - Google Patents

Power-operated loading gate for centrifugal machines Download PDF

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Publication number
US2801035A
US2801035A US380860A US38086053A US2801035A US 2801035 A US2801035 A US 2801035A US 380860 A US380860 A US 380860A US 38086053 A US38086053 A US 38086053A US 2801035 A US2801035 A US 2801035A
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US
United States
Prior art keywords
gate
loading
outlet
movement
spout
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US380860A
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English (en)
Inventor
Hertrich Elise
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Western States Machine Co
Original Assignee
Western States Machine Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR1112192D priority Critical patent/FR1112192A/fr
Application filed by Western States Machine Co filed Critical Western States Machine Co
Priority to US380860A priority patent/US2801035A/en
Priority to GB26902/54A priority patent/GB762436A/en
Application granted granted Critical
Publication of US2801035A publication Critical patent/US2801035A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor

Definitions

  • This invention relates to improvements in loading gates or spout discharge mechanisms, particularly for loading charges of sugar massecuite or magma into sugar centrifugals.
  • sugar crystals from mixtures of sugar crystals and syrup is carried out by treating charges of the mixture in centrifugal machines of the filtering type.
  • a supply tank, or centrifugal mixer is usually provided adjacent to a group of centrifugal machines to hold acomparatively large quantity of the mixture, and loading spouts or chutes extend from the bottom of the supply tank to positions permitting charges of the mixture to be discharged from the spouts and loaded into the baskets of the respective centrifugals.
  • Each loading spout is equipped with a loading gate for controlling the loading operations.
  • actuation is preferably performed automatically, for example, by pressure fluid operated devices.
  • an object of'the present invention is to provide a fluid pressure operated loading gate construction, for centrifugal mixer tanks and the like, which will operate more efliciently than known constructions and is particularly suitable for automatically controlled operation supervised from a remote control center.
  • Another object is to provide a loading gate construction of the described character wherein the gate body, through which the material flows from the related loading spout, has an improved facing at one end against which the gate slidably bears, with the facing being formed to minimize the frictional resistance to sliding movement of the gate and to provide a wiping action for avoiding scoring of the slidably contacting surfaces and for preventing the build-up of crystal and syrup deposits on such surfaces thereby to ensure proper sealing of the gate against the facing when the gate is in its closed position.
  • Another object is to provide a loading gate construction of the described character, wherein the initial portion of the gate movement from its closed position is automatically effected upon relaxation of the pressure fluid applied force urging the gate toward its closed position so that the pressure fluid applied force needed for opening the gate is minim zed and the gate opens, at least partially, in response to failure of the fluid pressure operated actuating means to afford a visual indication of such failure.
  • a further object of the invention is to provide means for urging the gate against the facing with a substantially constant yieldable force during movement of the gate toward and away from its closed position and a wedging action on the gate at the conclusion of its movement toward the closed position thereof for tightly seating the gate against the facing of the gate body, and wherein, upon release of the pressure fluid applied force urging the gate to its closed position, such wedging action results in a component of that force which acts parallel to the facing in the direction of movement of the gate toward its open position and has a magnitude greater than the frictional resistance to movement of the gate toward its open position so that the gate then automatically opens, at least partially, to assist in opening of the gate and toaflord a visual indication of the release of the pressure fluid applied force.
  • a loading gate construction is provided with a facing on the gate body having relatively narrow bearing strips thereon for sliding contact with the gate and formed of a hard, wear resistant material, with the bearing strips being inclined relative to the direction of travel of the gate between the open and closed positions of the latter so that the bearing strips produce a wiping action on the contacted surface of the gate to avoid scoring of the latter andthe build-up of accumulated crystal andsyrup deposits, and means urging the gate against the bearing strips with a yieldable force to ensure sealing of the gate against said strips during movement of the latter to and away from its closed position.
  • the movements of the gate between its open and closed positions are guided by contacting guide members on the gate and gate body having inclined or wedging portions engageable during the concluding portion of the movement of the gate toward its closed position to then clamp the gate against the facing of the gate body, with the wedging portions being inclined sufliciently relative to the path of movement of the gate so that the component of the above mentioned yieldable force acting parallel to that path of movement and in the direction tending to open the gate is greater than the frictional resistance to movement of the gate in said direction whereby the gate automatically opens, at least partially, upon release of the pressure fluid applied force used for closing the gate.
  • Fig. 1 is a fragmentary side elevational view, partly in section, showing portions of a centrifugal mixer having a loading spout extending therefrom, portions of a centrifugal machine arranged to be loaded from the spout, and a gate construction embodying the present invention and associated with the loading spout;
  • Fig. 2 is a front elevational view of the gate construction shown in Fig. 1;
  • Fig. 3 is a front elevational View, on an enlarged scale, ofda facing included in the gate construction of Figs. 1 an 2;
  • Fig. 4 is a fragmentary sectional View taken along the line 4-4 of Fig. 2, but on an enlarged scale;
  • Fig. 5 is a fragmentary sectional view taken along the line 5-5 of Fig. 2, but on an enlarged scale;
  • Fig. 6 is a fragmentary sectional view taken along the line 6-6 of Fig. 5.
  • a gate construction embodying the present invention is there illustrated and generally identified by the reference numeral it
  • the gate construction 10 is shown associated with a loading spout or chute 12 extending laterally and downwardly from the lower portion of a mixer tank 14 to a position overlying the curb or casing 16 and rotatable basket 18 of a sugar centrifugal.
  • the basket 18 is suspended in the usual manner-from a centrifugal spindle 20, which is adapted to be rotationally driven at high speed by suitable means (not shown) in order to separate syrup from each charge of sugar massecuite or magma in the basket and expel the and the lower endsof the H being connected by a lower cross-member 28 underlying the lower, margin; offthe spout outlet which isdefined bythe openipg' 30 irr the gate body,
  • the upper legs '32 of the forward end wallor facingproject-abovethegate body and provide a slideway for a gate 34in movement of the latter away from and to clo'sed position across spout'outlet opening 30; a
  • bearing strips 36 and 38 are formed of hard, we ar resista'nt metals which are welded tojhe, forwardface of end wall 2 4.
  • bearing strip 38 which extends around the opening 30, is preferably formed'of a weld of high speed cutting tool metal, such as, Stellitewhichis an alloyiof steel with cobalt, chromium'jandtung sten, while bearing strips 36, extending upwardly from the lower corners of strip 38, are preferably forrned of stainless steel weld.
  • the upper portions 36a of bearing strips 36 and the side portions 38a of bearing strip 38 are angled or inclined relative to the direction of movement of gate 34 away from and to its closed position, as indicated bythe arrow 40 (Fig. 3).
  • the bearing strips are narrow to minimize the area of the gate contacted at any time byfsuch strips and hence the frictional resistane mmevemem of the gate, the angled or inclined. character of portions 36a'and 38a of the bearing strips provides a wiping action across the rear face of gate.
  • gate actuating mechanism including a cross 'head 42 which extends transversely across the outer or front side of the gate and has rearwardly turned or directed end portions 44 (Fig. 5) embracing the opposite side edge of'end wall '24 of the gate body.
  • the 'rear edges of end portions 44 are inwardly flanged, as at 46, behind endwall 24, and guide members 48 and 50 (Figs. 5 and'6) are interposed between each of the flanges 46 and the rear face of the related side edge portion of end wall 24.
  • top and bottom ends of guide member 48 are formed with lips or rims 52 overlying and underlying, respectively, the-upper and lower edges of the adjacent end portion 44 and flange 46 at the related end of cross-head 42 so that each guide member 48 is constrained to move vertically with the cross head relative to gate body 22 and'the adjacent guide'member 50 which is secured to'end wall 24 of the gate body, as by machine screws 54.
  • Each guide member 48 is formed with a forwardly end, to a fitting 9ti provided on theend of a pistonrrod extending from a piston (not shown) within a related clined rear surface which is parallelto the inclined front surface of wedge shaped extension'48a.
  • the inclined surfaces of extensions: 48a and 50a are shown to incline forwardly in the upward direction so that, when such inclined surfaces slidably engage each other as a result of downward movement of cross-head 42,- the latter is urged rearwardly toward gate 34 for increasing the pressure of the latter against the bearing strips on end Wall 24;
  • extensions 50a are vertically disposed to engage. extensions 48a whenthecross head, and with it the gate 34, move through the con eluding portion of their downward movement eifective to cover the spout outlet opening 30.
  • Each'of the pressureexertingde vices 64 preferably includes a tubular member or sleeve 66 threaded into a suitable tapped bore in the: cross. head and accommodating a compression spring 68 bearing rearwardly against the related shoe 60.
  • Each of'the sleeves 66 at its forward end defines a tool receiving socket 70 for facilitating screwing of the sleeve, more or less, into the cross head to vary the compressive force. of the related spn'ng.
  • Such pressure fluid operated means preferably includes actuating arms 88 fixed to shaft 80 adjacent the opposite ends of the latter and each connected pivotally, at its free cylinder 92.
  • Each cylinder 92 is -rockably mounted at oneend ona suitable fixed .supportbracket, for example,
  • this automatic opening movement will give a visual indication of the failure so that a person supervising the centrifugal operation from a remote control station may notice the failure and immmediately take steps for its correction.
  • the gates associated with a plurality of loading spouts may be safely and efliciently controlled or operated from a remote control center from which the gates are visible, and the visible discharge of material under a supposedly closed gate provides an indication vof improper functioning in the pressure fluid operated control system associated with that gate.
  • the illustrated embodiment of the invention is a loading gate adapted especially for a mixer or loading
  • the gate body and actuating mechanism may be mounted so that the cross head and gate move me substantially horizontal plane, to allow material to flow almost vertically downward from the tank and spout. It is therefore desired that the invention be accorded a scope fully commensurate with its novel contributions to the art, as intended to be set forth in the appended claims.
  • a loading gate assembly comprising a hollow body adapted to form an end portion of a loading spout, said body forming a spout outlet and a face at the end of said outlet, said end face surrounding said outlet and having a portion extending to one side thereof, said end face being formed with narrow bearing strips of a hard wearresistant metal elevated from its surface and extending around said outlet and along said side portion, a gate fitted to slide on said bearing strips from a fully closed position covering said outlet to an open position in which it is displaced to said side thereof, yieldable means for pressing said gate against said end face, means connected with said gate for moving said gate along said bearing strips between said positions, power operated means operative to apply a powerful force through said gate moving means in the directions of the gate movements, means including inclined surfaces engaged by said gate moving means during a terminal part of the path of closing movement of said gate, whereby said gate moving means when moved by said force in said terminal part of said path, clamp said gate against said bearing strips under an extreme localized pressure to prevent leakage between said facing and said gate
  • a loading gate assembly comprising a hollow, open ended gate body adapted to form an end portion of a loading spout and having an end wall with an opening therein to define a spout outlet, said end wall having parallel, opposite longitudinal edges and an end face surrounding said spout outlet with a portion extending to a side of the latter; raised, narrow bearing strips of hard, wear resistant metal on said face of said end wall and extending around said outlet and along said side portion, a gate rectilinearly slidable on said bearing strips in a direction substantially parallel to said longitudinal edges between a fully closed position covering said outlet and an open position at said side of the outlet, a crosshead extending across said gate and loosely embracing said parallel longitudinal edges for movement therealong, said crosshead being connected to said gate and carrying yieldable means that constantly press said gate against said bearing strips, and actuating means for effecting rectilinear sliding movement of said gate and crosshead away from and to said fully closed and open positions of the gate.
  • a loading gate assembly according to claim 3; wherein parts of said bearing strips extending along said side portion are angled relative to the latter to wipe the contacted surface of said gate during sliding movement of the latter and distribute the wear over said contacted surface.
  • a loading gate-assembly comprising a hollow body adapted to forrnan end portion'of a loading spout,said body forming aspout outlet and having'a face at the end of saidoutlet, said end face surrounding said outlet and havinga portion extending to one side thereof, a gate fitted to slideon said face from afully closed position coveringsaid-outlet to an open position in which it is displaced to said side thereof, yieldable means for pressing said gate against-said end face, means connected with the gate.
  • a loading gate assembly comprising a hollow body adapted. to form-an end-portion of a' loading spout, said body forming a spout outlet'and'having a face at the endof said outlet, said end face surrounding said outlet and. having a portion extending to one side thereof, said endfacebeing formed with narrow bearing strips of a hardwear-resistant metal elevatedfrom its surface and extending around said outlet and along said side portion, a gate 'fittedto slide on saidbearing strips from a fullyv closed position covering said-outlet to an open position, in which ittis displaced to saidside thereof, yieldablemeans for pressing said gate against said bearing strips, meansv connected. with the gate formoving said gate.
  • 8.1Aloading-gate assembly comprising'a hollow body adapted .to. form an end portion of a lbading spout, said body: forming. a spout outlet and having a-face atthe end:.,of said .outlet,'said'end face surrounding saidoutlet and having --'aportion extending toone side thereof; a
  • a loading gate; assembly comprising a hollow gate body adapted to: formgan endzportiontof 'a loading spout, a facing mounted on,.and. surrounding the opening at, one
  • said facinghaving portions extended laterally away from said out--- let to onesideof saidbody, narrow bearingr strips, of relatively hard wear'resistant, material'fixed to; said fac ingwith partsof said s'tripsrsurrounding. said outlet and 1 other parts thereof extending away fromsaidsurrounding parts .and along said laterally extended facing portions at opposite sides of said'outlet;v said; strips having top surfaces elevated from said facing;and lying ina common flatplanega gate fitted to bear.
  • said strips having top surfaces elevated fromsaid facing andlying in a commonzfiat' plane, a gate fitted to bear. and slide on said strip sur- 7 faces, means for pressing said gate tightly against said surfaces, and means for sliding said gate on said surfaces in the direction of said extended'portions between a closed position in which said gate closessaid outlet and.
  • both said surrounding parts and said other parts of said strips atopposite sides-of saidoutlet having top surfaces-extending at angles to said' direction to wipe and distribute Wear over contacted surfaces of said gate;

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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
US380860A 1953-09-17 1953-09-17 Power-operated loading gate for centrifugal machines Expired - Lifetime US2801035A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1112192D FR1112192A (ja) 1953-09-17
US380860A US2801035A (en) 1953-09-17 1953-09-17 Power-operated loading gate for centrifugal machines
GB26902/54A GB762436A (en) 1953-09-17 1954-09-16 Improvements relating to loading gate assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US380860A US2801035A (en) 1953-09-17 1953-09-17 Power-operated loading gate for centrifugal machines

Publications (1)

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US2801035A true US2801035A (en) 1957-07-30

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US380860A Expired - Lifetime US2801035A (en) 1953-09-17 1953-09-17 Power-operated loading gate for centrifugal machines

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US (1) US2801035A (ja)
FR (1) FR1112192A (ja)
GB (1) GB762436A (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939616A (en) * 1958-01-21 1960-06-07 Farrel Birmingham Co Inc Door structure for rubber mixers and the like
US3011641A (en) * 1957-10-28 1961-12-05 Western States Machine Co Overriding loading control for centrifugal machines
US3097711A (en) * 1959-11-09 1963-07-16 Lake Shore Inc Skip loading and weighing apparatus
US3449778A (en) * 1967-09-21 1969-06-17 American Tent Co Inc Adjustable water safety jacket
US3901418A (en) * 1972-10-26 1975-08-26 United States Steel Corp Operating mechanism for slidable gates
EP0016201B1 (en) * 1978-08-23 1983-09-07 The Western States Machine Company Power-operated loading gate incorporating auxiliary drive means
US4616936A (en) * 1984-09-10 1986-10-14 Ber Fong Huang Construction of a foaming machine
US5254241A (en) * 1992-08-12 1993-10-19 The Western States Machine Company Loading control system for a cyclical centrifugal machine which adjusts pinch position

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1018552A (en) * 1911-10-04 1912-02-27 Richard T Cooke Can-spout.
US2337817A (en) * 1941-01-07 1943-12-28 Western States Machine Co Loading gate for centrifugal machines
US2517408A (en) * 1946-01-15 1950-08-01 Charles A Olcott Gate operating mechanism
US2663468A (en) * 1950-03-09 1953-12-22 Sam Schwartzman Sifter cap device for dispensing containers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1018552A (en) * 1911-10-04 1912-02-27 Richard T Cooke Can-spout.
US2337817A (en) * 1941-01-07 1943-12-28 Western States Machine Co Loading gate for centrifugal machines
US2517408A (en) * 1946-01-15 1950-08-01 Charles A Olcott Gate operating mechanism
US2663468A (en) * 1950-03-09 1953-12-22 Sam Schwartzman Sifter cap device for dispensing containers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011641A (en) * 1957-10-28 1961-12-05 Western States Machine Co Overriding loading control for centrifugal machines
US2939616A (en) * 1958-01-21 1960-06-07 Farrel Birmingham Co Inc Door structure for rubber mixers and the like
US3097711A (en) * 1959-11-09 1963-07-16 Lake Shore Inc Skip loading and weighing apparatus
US3449778A (en) * 1967-09-21 1969-06-17 American Tent Co Inc Adjustable water safety jacket
US3901418A (en) * 1972-10-26 1975-08-26 United States Steel Corp Operating mechanism for slidable gates
EP0016201B1 (en) * 1978-08-23 1983-09-07 The Western States Machine Company Power-operated loading gate incorporating auxiliary drive means
US4616936A (en) * 1984-09-10 1986-10-14 Ber Fong Huang Construction of a foaming machine
US5254241A (en) * 1992-08-12 1993-10-19 The Western States Machine Company Loading control system for a cyclical centrifugal machine which adjusts pinch position

Also Published As

Publication number Publication date
GB762436A (en) 1956-11-28
FR1112192A (ja) 1956-03-09

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